Re: Commit 500f7147cf5bafd139056d521536b10c2bc2e154 breaks _resume_

Jeff Chua
2011-02-07T08:36:38Z

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On Mon, Feb 7, 2011 at 4:25 PM, Takashi Iwai <tiwai@suse.de> wrote:
> At Mon, 7 Feb 2011 13:02:46 +0800,
> Jeff Chua wrote:
>>
>> On Mon, Feb 7, 2011 at 12:48 PM, Jeff Chua <jeff.chua.linux@gmail.com> wrote:
>> > On Sun, Feb 6, 2011 at 11:27 PM, Chris Wilson <chris@chris-wilson.co.uk> wrote:
>> >> One last step: move contents of intel_crtc_reset() back to
>> >> intel_crtc_init() one by one.
>> >>
>> >> The active flag is my suspicion. I was thinking that we brought up the
>> >> outputs in a similar manner upon resume as upon initial boot. On
>> >> reflection, this is the not case.
>> >>
>> >> However, the first action we take inside modesetting is to disable the
>> >> outputs about to be reconfigured. So setting active should be the right
>> >> course of action so that cleanup any residual state from resume.
>> >>
>> >> So I am intrigued as to which line is the cause, and just where the
>> >> machine becomes unresponsive...
>> >
>> > It's this line causing the problem.
>> >
>> > intel_crtc->active = true; /* force the pipe off on setup_init_config */
>> >
>> >
>> > When it's called before entering intel_crtc_reset(&intel_crtc->base),
>> > it works, but if called within the function, it doesn't work. Strange.
>> > Not sure whether is passing the correct value to to_intel_crtc(crtc)?
>>
>> I've added printk() below and the function returns a different value
>> of intel_crtc.
>>
>>
>> static void intel_crtc_reset(struct drm_crtc *crtc)
>> {
>>         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>>         printk("intel_crtc %p\n", intel_crtc); ===> intel_crtc ffff8802349d1000
>>
>> }
>>
>> printk("intel_crtc %p\n", intel_crtc); ===> intel_crtc ffff8802349d0000
>> intel_crtc_reset(&intel_crtc->base);
>
> That's weird.  Since base is the first member, both intel_crtc and crtc
> must be identical.

In case I'm messing something up, here's my intel_display.c

Thanks,
Jeff

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/*
* Copyright © 2006-2007 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*/

#include <linux/module.h>
#include <linux/input.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/vgaarb.h>
#include "drmP.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
#include "i915_trace.h"
#include "drm_dp_helper.h"

#include "drm_crtc_helper.h"

#define HAS_eDP (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))

bool intel_pipe_has_type (struct drm_crtc *crtc, int type);
static void intel_update_watermarks(struct drm_device *dev);
static void intel_increase_pllclock(struct drm_crtc *crtc);
static void intel_crtc_update_cursor(struct drm_crtc *crtc, bool on);

typedef struct {
/* given values */
int n;
int m1, m2;
int p1, p2;
/* derived values */
int dot;
int vco;
int m;
int p;
} intel_clock_t;

typedef struct {
int min, max;
} intel_range_t;

typedef struct {
int dot_limit;
int p2_slow, p2_fast;
} intel_p2_t;

#define INTEL_P2_NUM 2
typedef struct intel_limit intel_limit_t;
struct intel_limit {
intel_range_t dot, vco, n, m, m1, m2, p, p1;
intel_p2_t p2;
bool (* find_pll)(const intel_limit_t *, struct drm_crtc *,
int, int, intel_clock_t *);
};

#define I8XX_DOT_MIN 25000
#define I8XX_DOT_MAX 350000
#define I8XX_VCO_MIN 930000
#define I8XX_VCO_MAX 1400000
#define I8XX_N_MIN 3
#define I8XX_N_MAX 16
#define I8XX_M_MIN 96
#define I8XX_M_MAX 140
#define I8XX_M1_MIN 18
#define I8XX_M1_MAX 26
#define I8XX_M2_MIN 6
#define I8XX_M2_MAX 16
#define I8XX_P_MIN 4
#define I8XX_P_MAX 128
#define I8XX_P1_MIN 2
#define I8XX_P1_MAX 33
#define I8XX_P1_LVDS_MIN 1
#define I8XX_P1_LVDS_MAX 6
#define I8XX_P2_SLOW 4
#define I8XX_P2_FAST 2
#define I8XX_P2_LVDS_SLOW 14
#define I8XX_P2_LVDS_FAST 7
#define I8XX_P2_SLOW_LIMIT 165000

#define I9XX_DOT_MIN 20000
#define I9XX_DOT_MAX 400000
#define I9XX_VCO_MIN 1400000
#define I9XX_VCO_MAX 2800000
#define PINEVIEW_VCO_MIN 1700000
#define PINEVIEW_VCO_MAX 3500000
#define I9XX_N_MIN 1
#define I9XX_N_MAX 6
/* Pineview's Ncounter is a ring counter */
#define PINEVIEW_N_MIN 3
#define PINEVIEW_N_MAX 6
#define I9XX_M_MIN 70
#define I9XX_M_MAX 120
#define PINEVIEW_M_MIN 2
#define PINEVIEW_M_MAX 256
#define I9XX_M1_MIN 10
#define I9XX_M1_MAX 22
#define I9XX_M2_MIN 5
#define I9XX_M2_MAX 9
/* Pineview M1 is reserved, and must be 0 */
#define PINEVIEW_M1_MIN 0
#define PINEVIEW_M1_MAX 0
#define PINEVIEW_M2_MIN 0
#define PINEVIEW_M2_MAX 254
#define I9XX_P_SDVO_DAC_MIN 5
#define I9XX_P_SDVO_DAC_MAX 80
#define I9XX_P_LVDS_MIN 7
#define I9XX_P_LVDS_MAX 98
#define PINEVIEW_P_LVDS_MIN 7
#define PINEVIEW_P_LVDS_MAX 112
#define I9XX_P1_MIN 1
#define I9XX_P1_MAX 8
#define I9XX_P2_SDVO_DAC_SLOW 10
#define I9XX_P2_SDVO_DAC_FAST 5
#define I9XX_P2_SDVO_DAC_SLOW_LIMIT 200000
#define I9XX_P2_LVDS_SLOW 14
#define I9XX_P2_LVDS_FAST 7
#define I9XX_P2_LVDS_SLOW_LIMIT 112000

/*The parameter is for SDVO on G4x platform*/
#define G4X_DOT_SDVO_MIN 25000
#define G4X_DOT_SDVO_MAX 270000
#define G4X_VCO_MIN 1750000
#define G4X_VCO_MAX 3500000
#define G4X_N_SDVO_MIN 1
#define G4X_N_SDVO_MAX 4
#define G4X_M_SDVO_MIN 104
#define G4X_M_SDVO_MAX 138
#define G4X_M1_SDVO_MIN 17
#define G4X_M1_SDVO_MAX 23
#define G4X_M2_SDVO_MIN 5
#define G4X_M2_SDVO_MAX 11
#define G4X_P_SDVO_MIN 10
#define G4X_P_SDVO_MAX 30
#define G4X_P1_SDVO_MIN 1
#define G4X_P1_SDVO_MAX 3
#define G4X_P2_SDVO_SLOW 10
#define G4X_P2_SDVO_FAST 10
#define G4X_P2_SDVO_LIMIT 270000

/*The parameter is for HDMI_DAC on G4x platform*/
#define G4X_DOT_HDMI_DAC_MIN 22000
#define G4X_DOT_HDMI_DAC_MAX 400000
#define G4X_N_HDMI_DAC_MIN 1
#define G4X_N_HDMI_DAC_MAX 4
#define G4X_M_HDMI_DAC_MIN 104
#define G4X_M_HDMI_DAC_MAX 138
#define G4X_M1_HDMI_DAC_MIN 16
#define G4X_M1_HDMI_DAC_MAX 23
#define G4X_M2_HDMI_DAC_MIN 5
#define G4X_M2_HDMI_DAC_MAX 11
#define G4X_P_HDMI_DAC_MIN 5
#define G4X_P_HDMI_DAC_MAX 80
#define G4X_P1_HDMI_DAC_MIN 1
#define G4X_P1_HDMI_DAC_MAX 8
#define G4X_P2_HDMI_DAC_SLOW 10
#define G4X_P2_HDMI_DAC_FAST 5
#define G4X_P2_HDMI_DAC_LIMIT 165000

/*The parameter is for SINGLE_CHANNEL_LVDS on G4x platform*/
#define G4X_DOT_SINGLE_CHANNEL_LVDS_MIN 20000
#define G4X_DOT_SINGLE_CHANNEL_LVDS_MAX 115000
#define G4X_N_SINGLE_CHANNEL_LVDS_MIN 1
#define G4X_N_SINGLE_CHANNEL_LVDS_MAX 3
#define G4X_M_SINGLE_CHANNEL_LVDS_MIN 104
#define G4X_M_SINGLE_CHANNEL_LVDS_MAX 138
#define G4X_M1_SINGLE_CHANNEL_LVDS_MIN 17
#define G4X_M1_SINGLE_CHANNEL_LVDS_MAX 23
#define G4X_M2_SINGLE_CHANNEL_LVDS_MIN 5
#define G4X_M2_SINGLE_CHANNEL_LVDS_MAX 11
#define G4X_P_SINGLE_CHANNEL_LVDS_MIN 28
#define G4X_P_SINGLE_CHANNEL_LVDS_MAX 112
#define G4X_P1_SINGLE_CHANNEL_LVDS_MIN 2
#define G4X_P1_SINGLE_CHANNEL_LVDS_MAX 8
#define G4X_P2_SINGLE_CHANNEL_LVDS_SLOW 14
#define G4X_P2_SINGLE_CHANNEL_LVDS_FAST 14
#define G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT 0

/*The parameter is for DUAL_CHANNEL_LVDS on G4x platform*/
#define G4X_DOT_DUAL_CHANNEL_LVDS_MIN 80000
#define G4X_DOT_DUAL_CHANNEL_LVDS_MAX 224000
#define G4X_N_DUAL_CHANNEL_LVDS_MIN 1
#define G4X_N_DUAL_CHANNEL_LVDS_MAX 3
#define G4X_M_DUAL_CHANNEL_LVDS_MIN 104
#define G4X_M_DUAL_CHANNEL_LVDS_MAX 138
#define G4X_M1_DUAL_CHANNEL_LVDS_MIN 17
#define G4X_M1_DUAL_CHANNEL_LVDS_MAX 23
#define G4X_M2_DUAL_CHANNEL_LVDS_MIN 5
#define G4X_M2_DUAL_CHANNEL_LVDS_MAX 11
#define G4X_P_DUAL_CHANNEL_LVDS_MIN 14
#define G4X_P_DUAL_CHANNEL_LVDS_MAX 42
#define G4X_P1_DUAL_CHANNEL_LVDS_MIN 2
#define G4X_P1_DUAL_CHANNEL_LVDS_MAX 6
#define G4X_P2_DUAL_CHANNEL_LVDS_SLOW 7
#define G4X_P2_DUAL_CHANNEL_LVDS_FAST 7
#define G4X_P2_DUAL_CHANNEL_LVDS_LIMIT 0

/*The parameter is for DISPLAY PORT on G4x platform*/
#define G4X_DOT_DISPLAY_PORT_MIN 161670
#define G4X_DOT_DISPLAY_PORT_MAX 227000
#define G4X_N_DISPLAY_PORT_MIN 1
#define G4X_N_DISPLAY_PORT_MAX 2
#define G4X_M_DISPLAY_PORT_MIN 97
#define G4X_M_DISPLAY_PORT_MAX 108
#define G4X_M1_DISPLAY_PORT_MIN 0x10
#define G4X_M1_DISPLAY_PORT_MAX 0x12
#define G4X_M2_DISPLAY_PORT_MIN 0x05
#define G4X_M2_DISPLAY_PORT_MAX 0x06
#define G4X_P_DISPLAY_PORT_MIN 10
#define G4X_P_DISPLAY_PORT_MAX 20
#define G4X_P1_DISPLAY_PORT_MIN 1
#define G4X_P1_DISPLAY_PORT_MAX 2
#define G4X_P2_DISPLAY_PORT_SLOW 10
#define G4X_P2_DISPLAY_PORT_FAST 10
#define G4X_P2_DISPLAY_PORT_LIMIT 0

/* Ironlake / Sandybridge */
/* as we calculate clock using (register_value + 2) for
N/M1/M2, so here the range value for them is (actual_value-2).
*/
#define IRONLAKE_DOT_MIN 25000
#define IRONLAKE_DOT_MAX 350000
#define IRONLAKE_VCO_MIN 1760000
#define IRONLAKE_VCO_MAX 3510000
#define IRONLAKE_M1_MIN 12
#define IRONLAKE_M1_MAX 22
#define IRONLAKE_M2_MIN 5
#define IRONLAKE_M2_MAX 9
#define IRONLAKE_P2_DOT_LIMIT 225000 /* 225Mhz */

/* We have parameter ranges for different type of outputs. */

/* DAC & HDMI Refclk 120Mhz */
#define IRONLAKE_DAC_N_MIN 1
#define IRONLAKE_DAC_N_MAX 5
#define IRONLAKE_DAC_M_MIN 79
#define IRONLAKE_DAC_M_MAX 127
#define IRONLAKE_DAC_P_MIN 5
#define IRONLAKE_DAC_P_MAX 80
#define IRONLAKE_DAC_P1_MIN 1
#define IRONLAKE_DAC_P1_MAX 8
#define IRONLAKE_DAC_P2_SLOW 10
#define IRONLAKE_DAC_P2_FAST 5

/* LVDS single-channel 120Mhz refclk */
#define IRONLAKE_LVDS_S_N_MIN 1
#define IRONLAKE_LVDS_S_N_MAX 3
#define IRONLAKE_LVDS_S_M_MIN 79
#define IRONLAKE_LVDS_S_M_MAX 118
#define IRONLAKE_LVDS_S_P_MIN 28
#define IRONLAKE_LVDS_S_P_MAX 112
#define IRONLAKE_LVDS_S_P1_MIN 2
#define IRONLAKE_LVDS_S_P1_MAX 8
#define IRONLAKE_LVDS_S_P2_SLOW 14
#define IRONLAKE_LVDS_S_P2_FAST 14

/* LVDS dual-channel 120Mhz refclk */
#define IRONLAKE_LVDS_D_N_MIN 1
#define IRONLAKE_LVDS_D_N_MAX 3
#define IRONLAKE_LVDS_D_M_MIN 79
#define IRONLAKE_LVDS_D_M_MAX 127
#define IRONLAKE_LVDS_D_P_MIN 14
#define IRONLAKE_LVDS_D_P_MAX 56
#define IRONLAKE_LVDS_D_P1_MIN 2
#define IRONLAKE_LVDS_D_P1_MAX 8
#define IRONLAKE_LVDS_D_P2_SLOW 7
#define IRONLAKE_LVDS_D_P2_FAST 7

/* LVDS single-channel 100Mhz refclk */
#define IRONLAKE_LVDS_S_SSC_N_MIN 1
#define IRONLAKE_LVDS_S_SSC_N_MAX 2
#define IRONLAKE_LVDS_S_SSC_M_MIN 79
#define IRONLAKE_LVDS_S_SSC_M_MAX 126
#define IRONLAKE_LVDS_S_SSC_P_MIN 28
#define IRONLAKE_LVDS_S_SSC_P_MAX 112
#define IRONLAKE_LVDS_S_SSC_P1_MIN 2
#define IRONLAKE_LVDS_S_SSC_P1_MAX 8
#define IRONLAKE_LVDS_S_SSC_P2_SLOW 14
#define IRONLAKE_LVDS_S_SSC_P2_FAST 14

/* LVDS dual-channel 100Mhz refclk */
#define IRONLAKE_LVDS_D_SSC_N_MIN 1
#define IRONLAKE_LVDS_D_SSC_N_MAX 3
#define IRONLAKE_LVDS_D_SSC_M_MIN 79
#define IRONLAKE_LVDS_D_SSC_M_MAX 126
#define IRONLAKE_LVDS_D_SSC_P_MIN 14
#define IRONLAKE_LVDS_D_SSC_P_MAX 42
#define IRONLAKE_LVDS_D_SSC_P1_MIN 2
#define IRONLAKE_LVDS_D_SSC_P1_MAX 6
#define IRONLAKE_LVDS_D_SSC_P2_SLOW 7
#define IRONLAKE_LVDS_D_SSC_P2_FAST 7

/* DisplayPort */
#define IRONLAKE_DP_N_MIN 1
#define IRONLAKE_DP_N_MAX 2
#define IRONLAKE_DP_M_MIN 81
#define IRONLAKE_DP_M_MAX 90
#define IRONLAKE_DP_P_MIN 10
#define IRONLAKE_DP_P_MAX 20
#define IRONLAKE_DP_P2_FAST 10
#define IRONLAKE_DP_P2_SLOW 10
#define IRONLAKE_DP_P2_LIMIT 0
#define IRONLAKE_DP_P1_MIN 1
#define IRONLAKE_DP_P1_MAX 2

/* FDI */
#define IRONLAKE_FDI_FREQ 2700000 /* in kHz for mode->clock */

static bool
intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock);
static bool
intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock);

static bool
intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock);
static bool
intel_find_pll_ironlake_dp(const intel_limit_t *, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock);

static inline u32 /* units of 100MHz */
intel_fdi_link_freq(struct drm_device *dev)
{
if (IS_GEN5(dev)) {
struct drm_i915_private *dev_priv = dev->dev_private;
return (I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK) + 2;
} else
return 27;
}

static const intel_limit_t intel_limits_i8xx_dvo = {
.dot = { .min = I8XX_DOT_MIN, .max = I8XX_DOT_MAX },
.vco = { .min = I8XX_VCO_MIN, .max = I8XX_VCO_MAX },
.n = { .min = I8XX_N_MIN, .max = I8XX_N_MAX },
.m = { .min = I8XX_M_MIN, .max = I8XX_M_MAX },
.m1 = { .min = I8XX_M1_MIN, .max = I8XX_M1_MAX },
.m2 = { .min = I8XX_M2_MIN, .max = I8XX_M2_MAX },
.p = { .min = I8XX_P_MIN, .max = I8XX_P_MAX },
.p1 = { .min = I8XX_P1_MIN, .max = I8XX_P1_MAX },
.p2 = { .dot_limit = I8XX_P2_SLOW_LIMIT,
.p2_slow = I8XX_P2_SLOW, .p2_fast = I8XX_P2_FAST },
.find_pll = intel_find_best_PLL,
};

static const intel_limit_t intel_limits_i8xx_lvds = {
.dot = { .min = I8XX_DOT_MIN, .max = I8XX_DOT_MAX },
.vco = { .min = I8XX_VCO_MIN, .max = I8XX_VCO_MAX },
.n = { .min = I8XX_N_MIN, .max = I8XX_N_MAX },
.m = { .min = I8XX_M_MIN, .max = I8XX_M_MAX },
.m1 = { .min = I8XX_M1_MIN, .max = I8XX_M1_MAX },
.m2 = { .min = I8XX_M2_MIN, .max = I8XX_M2_MAX },
.p = { .min = I8XX_P_MIN, .max = I8XX_P_MAX },
.p1 = { .min = I8XX_P1_LVDS_MIN, .max = I8XX_P1_LVDS_MAX },
.p2 = { .dot_limit = I8XX_P2_SLOW_LIMIT,
.p2_slow = I8XX_P2_LVDS_SLOW, .p2_fast = I8XX_P2_LVDS_FAST },
.find_pll = intel_find_best_PLL,
};

static const intel_limit_t intel_limits_i9xx_sdvo = {
.dot = { .min = I9XX_DOT_MIN, .max = I9XX_DOT_MAX },
.vco = { .min = I9XX_VCO_MIN, .max = I9XX_VCO_MAX },
.n = { .min = I9XX_N_MIN, .max = I9XX_N_MAX },
.m = { .min = I9XX_M_MIN, .max = I9XX_M_MAX },
.m1 = { .min = I9XX_M1_MIN, .max = I9XX_M1_MAX },
.m2 = { .min = I9XX_M2_MIN, .max = I9XX_M2_MAX },
.p = { .min = I9XX_P_SDVO_DAC_MIN, .max = I9XX_P_SDVO_DAC_MAX },
.p1 = { .min = I9XX_P1_MIN, .max = I9XX_P1_MAX },
.p2 = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
.p2_slow = I9XX_P2_SDVO_DAC_SLOW, .p2_fast = I9XX_P2_SDVO_DAC_FAST },
.find_pll = intel_find_best_PLL,
};

static const intel_limit_t intel_limits_i9xx_lvds = {
.dot = { .min = I9XX_DOT_MIN, .max = I9XX_DOT_MAX },
.vco = { .min = I9XX_VCO_MIN, .max = I9XX_VCO_MAX },
.n = { .min = I9XX_N_MIN, .max = I9XX_N_MAX },
.m = { .min = I9XX_M_MIN, .max = I9XX_M_MAX },
.m1 = { .min = I9XX_M1_MIN, .max = I9XX_M1_MAX },
.m2 = { .min = I9XX_M2_MIN, .max = I9XX_M2_MAX },
.p = { .min = I9XX_P_LVDS_MIN, .max = I9XX_P_LVDS_MAX },
.p1 = { .min = I9XX_P1_MIN, .max = I9XX_P1_MAX },
/* The single-channel range is 25-112Mhz, and dual-channel
* is 80-224Mhz. Prefer single channel as much as possible.
*/
.p2 = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
.p2_slow = I9XX_P2_LVDS_SLOW, .p2_fast = I9XX_P2_LVDS_FAST },
.find_pll = intel_find_best_PLL,
};

/* below parameter and function is for G4X Chipset Family*/
static const intel_limit_t intel_limits_g4x_sdvo = {
.dot = { .min = G4X_DOT_SDVO_MIN, .max = G4X_DOT_SDVO_MAX },
.vco = { .min = G4X_VCO_MIN, .max = G4X_VCO_MAX},
.n = { .min = G4X_N_SDVO_MIN, .max = G4X_N_SDVO_MAX },
.m = { .min = G4X_M_SDVO_MIN, .max = G4X_M_SDVO_MAX },
.m1 = { .min = G4X_M1_SDVO_MIN, .max = G4X_M1_SDVO_MAX },
.m2 = { .min = G4X_M2_SDVO_MIN, .max = G4X_M2_SDVO_MAX },
.p = { .min = G4X_P_SDVO_MIN, .max = G4X_P_SDVO_MAX },
.p1 = { .min = G4X_P1_SDVO_MIN, .max = G4X_P1_SDVO_MAX},
.p2 = { .dot_limit = G4X_P2_SDVO_LIMIT,
.p2_slow = G4X_P2_SDVO_SLOW,
.p2_fast = G4X_P2_SDVO_FAST
},
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_g4x_hdmi = {
.dot = { .min = G4X_DOT_HDMI_DAC_MIN, .max = G4X_DOT_HDMI_DAC_MAX },
.vco = { .min = G4X_VCO_MIN, .max = G4X_VCO_MAX},
.n = { .min = G4X_N_HDMI_DAC_MIN, .max = G4X_N_HDMI_DAC_MAX },
.m = { .min = G4X_M_HDMI_DAC_MIN, .max = G4X_M_HDMI_DAC_MAX },
.m1 = { .min = G4X_M1_HDMI_DAC_MIN, .max = G4X_M1_HDMI_DAC_MAX },
.m2 = { .min = G4X_M2_HDMI_DAC_MIN, .max = G4X_M2_HDMI_DAC_MAX },
.p = { .min = G4X_P_HDMI_DAC_MIN, .max = G4X_P_HDMI_DAC_MAX },
.p1 = { .min = G4X_P1_HDMI_DAC_MIN, .max = G4X_P1_HDMI_DAC_MAX},
.p2 = { .dot_limit = G4X_P2_HDMI_DAC_LIMIT,
.p2_slow = G4X_P2_HDMI_DAC_SLOW,
.p2_fast = G4X_P2_HDMI_DAC_FAST
},
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
.dot = { .min = G4X_DOT_SINGLE_CHANNEL_LVDS_MIN,
.max = G4X_DOT_SINGLE_CHANNEL_LVDS_MAX },
.vco = { .min = G4X_VCO_MIN,
.max = G4X_VCO_MAX },
.n = { .min = G4X_N_SINGLE_CHANNEL_LVDS_MIN,
.max = G4X_N_SINGLE_CHANNEL_LVDS_MAX },
.m = { .min = G4X_M_SINGLE_CHANNEL_LVDS_MIN,
.max = G4X_M_SINGLE_CHANNEL_LVDS_MAX },
.m1 = { .min = G4X_M1_SINGLE_CHANNEL_LVDS_MIN,
.max = G4X_M1_SINGLE_CHANNEL_LVDS_MAX },
.m2 = { .min = G4X_M2_SINGLE_CHANNEL_LVDS_MIN,
.max = G4X_M2_SINGLE_CHANNEL_LVDS_MAX },
.p = { .min = G4X_P_SINGLE_CHANNEL_LVDS_MIN,
.max = G4X_P_SINGLE_CHANNEL_LVDS_MAX },
.p1 = { .min = G4X_P1_SINGLE_CHANNEL_LVDS_MIN,
.max = G4X_P1_SINGLE_CHANNEL_LVDS_MAX },
.p2 = { .dot_limit = G4X_P2_SINGLE_CHANNEL_LVDS_LIMIT,
.p2_slow = G4X_P2_SINGLE_CHANNEL_LVDS_SLOW,
.p2_fast = G4X_P2_SINGLE_CHANNEL_LVDS_FAST
},
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
.dot = { .min = G4X_DOT_DUAL_CHANNEL_LVDS_MIN,
.max = G4X_DOT_DUAL_CHANNEL_LVDS_MAX },
.vco = { .min = G4X_VCO_MIN,
.max = G4X_VCO_MAX },
.n = { .min = G4X_N_DUAL_CHANNEL_LVDS_MIN,
.max = G4X_N_DUAL_CHANNEL_LVDS_MAX },
.m = { .min = G4X_M_DUAL_CHANNEL_LVDS_MIN,
.max = G4X_M_DUAL_CHANNEL_LVDS_MAX },
.m1 = { .min = G4X_M1_DUAL_CHANNEL_LVDS_MIN,
.max = G4X_M1_DUAL_CHANNEL_LVDS_MAX },
.m2 = { .min = G4X_M2_DUAL_CHANNEL_LVDS_MIN,
.max = G4X_M2_DUAL_CHANNEL_LVDS_MAX },
.p = { .min = G4X_P_DUAL_CHANNEL_LVDS_MIN,
.max = G4X_P_DUAL_CHANNEL_LVDS_MAX },
.p1 = { .min = G4X_P1_DUAL_CHANNEL_LVDS_MIN,
.max = G4X_P1_DUAL_CHANNEL_LVDS_MAX },
.p2 = { .dot_limit = G4X_P2_DUAL_CHANNEL_LVDS_LIMIT,
.p2_slow = G4X_P2_DUAL_CHANNEL_LVDS_SLOW,
.p2_fast = G4X_P2_DUAL_CHANNEL_LVDS_FAST
},
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_g4x_display_port = {
.dot = { .min = G4X_DOT_DISPLAY_PORT_MIN,
.max = G4X_DOT_DISPLAY_PORT_MAX },
.vco = { .min = G4X_VCO_MIN,
.max = G4X_VCO_MAX},
.n = { .min = G4X_N_DISPLAY_PORT_MIN,
.max = G4X_N_DISPLAY_PORT_MAX },
.m = { .min = G4X_M_DISPLAY_PORT_MIN,
.max = G4X_M_DISPLAY_PORT_MAX },
.m1 = { .min = G4X_M1_DISPLAY_PORT_MIN,
.max = G4X_M1_DISPLAY_PORT_MAX },
.m2 = { .min = G4X_M2_DISPLAY_PORT_MIN,
.max = G4X_M2_DISPLAY_PORT_MAX },
.p = { .min = G4X_P_DISPLAY_PORT_MIN,
.max = G4X_P_DISPLAY_PORT_MAX },
.p1 = { .min = G4X_P1_DISPLAY_PORT_MIN,
.max = G4X_P1_DISPLAY_PORT_MAX},
.p2 = { .dot_limit = G4X_P2_DISPLAY_PORT_LIMIT,
.p2_slow = G4X_P2_DISPLAY_PORT_SLOW,
.p2_fast = G4X_P2_DISPLAY_PORT_FAST },
.find_pll = intel_find_pll_g4x_dp,
};

static const intel_limit_t intel_limits_pineview_sdvo = {
.dot = { .min = I9XX_DOT_MIN, .max = I9XX_DOT_MAX},
.vco = { .min = PINEVIEW_VCO_MIN, .max = PINEVIEW_VCO_MAX },
.n = { .min = PINEVIEW_N_MIN, .max = PINEVIEW_N_MAX },
.m = { .min = PINEVIEW_M_MIN, .max = PINEVIEW_M_MAX },
.m1 = { .min = PINEVIEW_M1_MIN, .max = PINEVIEW_M1_MAX },
.m2 = { .min = PINEVIEW_M2_MIN, .max = PINEVIEW_M2_MAX },
.p = { .min = I9XX_P_SDVO_DAC_MIN, .max = I9XX_P_SDVO_DAC_MAX },
.p1 = { .min = I9XX_P1_MIN, .max = I9XX_P1_MAX },
.p2 = { .dot_limit = I9XX_P2_SDVO_DAC_SLOW_LIMIT,
.p2_slow = I9XX_P2_SDVO_DAC_SLOW, .p2_fast = I9XX_P2_SDVO_DAC_FAST },
.find_pll = intel_find_best_PLL,
};

static const intel_limit_t intel_limits_pineview_lvds = {
.dot = { .min = I9XX_DOT_MIN, .max = I9XX_DOT_MAX },
.vco = { .min = PINEVIEW_VCO_MIN, .max = PINEVIEW_VCO_MAX },
.n = { .min = PINEVIEW_N_MIN, .max = PINEVIEW_N_MAX },
.m = { .min = PINEVIEW_M_MIN, .max = PINEVIEW_M_MAX },
.m1 = { .min = PINEVIEW_M1_MIN, .max = PINEVIEW_M1_MAX },
.m2 = { .min = PINEVIEW_M2_MIN, .max = PINEVIEW_M2_MAX },
.p = { .min = PINEVIEW_P_LVDS_MIN, .max = PINEVIEW_P_LVDS_MAX },
.p1 = { .min = I9XX_P1_MIN, .max = I9XX_P1_MAX },
/* Pineview only supports single-channel mode. */
.p2 = { .dot_limit = I9XX_P2_LVDS_SLOW_LIMIT,
.p2_slow = I9XX_P2_LVDS_SLOW, .p2_fast = I9XX_P2_LVDS_SLOW },
.find_pll = intel_find_best_PLL,
};

static const intel_limit_t intel_limits_ironlake_dac = {
.dot = { .min = IRONLAKE_DOT_MIN, .max = IRONLAKE_DOT_MAX },
.vco = { .min = IRONLAKE_VCO_MIN, .max = IRONLAKE_VCO_MAX },
.n = { .min = IRONLAKE_DAC_N_MIN, .max = IRONLAKE_DAC_N_MAX },
.m = { .min = IRONLAKE_DAC_M_MIN, .max = IRONLAKE_DAC_M_MAX },
.m1 = { .min = IRONLAKE_M1_MIN, .max = IRONLAKE_M1_MAX },
.m2 = { .min = IRONLAKE_M2_MIN, .max = IRONLAKE_M2_MAX },
.p = { .min = IRONLAKE_DAC_P_MIN, .max = IRONLAKE_DAC_P_MAX },
.p1 = { .min = IRONLAKE_DAC_P1_MIN, .max = IRONLAKE_DAC_P1_MAX },
.p2 = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
.p2_slow = IRONLAKE_DAC_P2_SLOW,
.p2_fast = IRONLAKE_DAC_P2_FAST },
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_ironlake_single_lvds = {
.dot = { .min = IRONLAKE_DOT_MIN, .max = IRONLAKE_DOT_MAX },
.vco = { .min = IRONLAKE_VCO_MIN, .max = IRONLAKE_VCO_MAX },
.n = { .min = IRONLAKE_LVDS_S_N_MIN, .max = IRONLAKE_LVDS_S_N_MAX },
.m = { .min = IRONLAKE_LVDS_S_M_MIN, .max = IRONLAKE_LVDS_S_M_MAX },
.m1 = { .min = IRONLAKE_M1_MIN, .max = IRONLAKE_M1_MAX },
.m2 = { .min = IRONLAKE_M2_MIN, .max = IRONLAKE_M2_MAX },
.p = { .min = IRONLAKE_LVDS_S_P_MIN, .max = IRONLAKE_LVDS_S_P_MAX },
.p1 = { .min = IRONLAKE_LVDS_S_P1_MIN, .max = IRONLAKE_LVDS_S_P1_MAX },
.p2 = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
.p2_slow = IRONLAKE_LVDS_S_P2_SLOW,
.p2_fast = IRONLAKE_LVDS_S_P2_FAST },
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_ironlake_dual_lvds = {
.dot = { .min = IRONLAKE_DOT_MIN, .max = IRONLAKE_DOT_MAX },
.vco = { .min = IRONLAKE_VCO_MIN, .max = IRONLAKE_VCO_MAX },
.n = { .min = IRONLAKE_LVDS_D_N_MIN, .max = IRONLAKE_LVDS_D_N_MAX },
.m = { .min = IRONLAKE_LVDS_D_M_MIN, .max = IRONLAKE_LVDS_D_M_MAX },
.m1 = { .min = IRONLAKE_M1_MIN, .max = IRONLAKE_M1_MAX },
.m2 = { .min = IRONLAKE_M2_MIN, .max = IRONLAKE_M2_MAX },
.p = { .min = IRONLAKE_LVDS_D_P_MIN, .max = IRONLAKE_LVDS_D_P_MAX },
.p1 = { .min = IRONLAKE_LVDS_D_P1_MIN, .max = IRONLAKE_LVDS_D_P1_MAX },
.p2 = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
.p2_slow = IRONLAKE_LVDS_D_P2_SLOW,
.p2_fast = IRONLAKE_LVDS_D_P2_FAST },
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
.dot = { .min = IRONLAKE_DOT_MIN, .max = IRONLAKE_DOT_MAX },
.vco = { .min = IRONLAKE_VCO_MIN, .max = IRONLAKE_VCO_MAX },
.n = { .min = IRONLAKE_LVDS_S_SSC_N_MIN, .max = IRONLAKE_LVDS_S_SSC_N_MAX },
.m = { .min = IRONLAKE_LVDS_S_SSC_M_MIN, .max = IRONLAKE_LVDS_S_SSC_M_MAX },
.m1 = { .min = IRONLAKE_M1_MIN, .max = IRONLAKE_M1_MAX },
.m2 = { .min = IRONLAKE_M2_MIN, .max = IRONLAKE_M2_MAX },
.p = { .min = IRONLAKE_LVDS_S_SSC_P_MIN, .max = IRONLAKE_LVDS_S_SSC_P_MAX },
.p1 = { .min = IRONLAKE_LVDS_S_SSC_P1_MIN,.max = IRONLAKE_LVDS_S_SSC_P1_MAX },
.p2 = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
.p2_slow = IRONLAKE_LVDS_S_SSC_P2_SLOW,
.p2_fast = IRONLAKE_LVDS_S_SSC_P2_FAST },
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
.dot = { .min = IRONLAKE_DOT_MIN, .max = IRONLAKE_DOT_MAX },
.vco = { .min = IRONLAKE_VCO_MIN, .max = IRONLAKE_VCO_MAX },
.n = { .min = IRONLAKE_LVDS_D_SSC_N_MIN, .max = IRONLAKE_LVDS_D_SSC_N_MAX },
.m = { .min = IRONLAKE_LVDS_D_SSC_M_MIN, .max = IRONLAKE_LVDS_D_SSC_M_MAX },
.m1 = { .min = IRONLAKE_M1_MIN, .max = IRONLAKE_M1_MAX },
.m2 = { .min = IRONLAKE_M2_MIN, .max = IRONLAKE_M2_MAX },
.p = { .min = IRONLAKE_LVDS_D_SSC_P_MIN, .max = IRONLAKE_LVDS_D_SSC_P_MAX },
.p1 = { .min = IRONLAKE_LVDS_D_SSC_P1_MIN,.max = IRONLAKE_LVDS_D_SSC_P1_MAX },
.p2 = { .dot_limit = IRONLAKE_P2_DOT_LIMIT,
.p2_slow = IRONLAKE_LVDS_D_SSC_P2_SLOW,
.p2_fast = IRONLAKE_LVDS_D_SSC_P2_FAST },
.find_pll = intel_g4x_find_best_PLL,
};

static const intel_limit_t intel_limits_ironlake_display_port = {
.dot = { .min = IRONLAKE_DOT_MIN,
.max = IRONLAKE_DOT_MAX },
.vco = { .min = IRONLAKE_VCO_MIN,
.max = IRONLAKE_VCO_MAX},
.n = { .min = IRONLAKE_DP_N_MIN,
.max = IRONLAKE_DP_N_MAX },
.m = { .min = IRONLAKE_DP_M_MIN,
.max = IRONLAKE_DP_M_MAX },
.m1 = { .min = IRONLAKE_M1_MIN,
.max = IRONLAKE_M1_MAX },
.m2 = { .min = IRONLAKE_M2_MIN,
.max = IRONLAKE_M2_MAX },
.p = { .min = IRONLAKE_DP_P_MIN,
.max = IRONLAKE_DP_P_MAX },
.p1 = { .min = IRONLAKE_DP_P1_MIN,
.max = IRONLAKE_DP_P1_MAX},
.p2 = { .dot_limit = IRONLAKE_DP_P2_LIMIT,
.p2_slow = IRONLAKE_DP_P2_SLOW,
.p2_fast = IRONLAKE_DP_P2_FAST },
.find_pll = intel_find_pll_ironlake_dp,
};

static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc,
int refclk)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
const intel_limit_t *limit;

if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
if ((I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) ==
LVDS_CLKB_POWER_UP) {
/* LVDS dual channel */
if (refclk == 100000)
limit = &intel_limits_ironlake_dual_lvds_100m;
else
limit = &intel_limits_ironlake_dual_lvds;
} else {
if (refclk == 100000)
limit = &intel_limits_ironlake_single_lvds_100m;
else
limit = &intel_limits_ironlake_single_lvds;
}
} else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
HAS_eDP)
limit = &intel_limits_ironlake_display_port;
else
limit = &intel_limits_ironlake_dac;

return limit;
}

static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
const intel_limit_t *limit;

if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
LVDS_CLKB_POWER_UP)
/* LVDS with dual channel */
limit = &intel_limits_g4x_dual_channel_lvds;
else
/* LVDS with dual channel */
limit = &intel_limits_g4x_single_channel_lvds;
} else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
limit = &intel_limits_g4x_hdmi;
} else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
limit = &intel_limits_g4x_sdvo;
} else if (intel_pipe_has_type (crtc, INTEL_OUTPUT_DISPLAYPORT)) {
limit = &intel_limits_g4x_display_port;
} else /* The option is for other outputs */
limit = &intel_limits_i9xx_sdvo;

return limit;
}

static const intel_limit_t *intel_limit(struct drm_crtc *crtc, int refclk)
{
struct drm_device *dev = crtc->dev;
const intel_limit_t *limit;

if (HAS_PCH_SPLIT(dev))
limit = intel_ironlake_limit(crtc, refclk);
else if (IS_G4X(dev)) {
limit = intel_g4x_limit(crtc);
} else if (IS_PINEVIEW(dev)) {
if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
limit = &intel_limits_pineview_lvds;
else
limit = &intel_limits_pineview_sdvo;
} else if (!IS_GEN2(dev)) {
if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
limit = &intel_limits_i9xx_lvds;
else
limit = &intel_limits_i9xx_sdvo;
} else {
if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
limit = &intel_limits_i8xx_lvds;
else
limit = &intel_limits_i8xx_dvo;
}
return limit;
}

/* m1 is reserved as 0 in Pineview, n is a ring counter */
static void pineview_clock(int refclk, intel_clock_t *clock)
{
clock->m = clock->m2 + 2;
clock->p = clock->p1 * clock->p2;
clock->vco = refclk * clock->m / clock->n;
clock->dot = clock->vco / clock->p;
}

static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
{
if (IS_PINEVIEW(dev)) {
pineview_clock(refclk, clock);
return;
}
clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
clock->p = clock->p1 * clock->p2;
clock->vco = refclk * clock->m / (clock->n + 2);
clock->dot = clock->vco / clock->p;
}

/**
* Returns whether any output on the specified pipe is of the specified type
*/
bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
{
struct drm_device *dev = crtc->dev;
struct drm_mode_config *mode_config = &dev->mode_config;
struct intel_encoder *encoder;

list_for_each_entry(encoder, &mode_config->encoder_list, base.head)
if (encoder->base.crtc == crtc && encoder->type == type)
return true;

return false;
}

#define INTELPllInvalid(s) do { /* DRM_DEBUG(s); */ return false; } while (0)
/**
* Returns whether the given set of divisors are valid for a given refclk with
* the given connectors.
*/

static bool intel_PLL_is_valid(struct drm_device *dev,
const intel_limit_t *limit,
const intel_clock_t *clock)
{
if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
INTELPllInvalid ("p1 out of range\n");
if (clock->p < limit->p.min || limit->p.max < clock->p)
INTELPllInvalid ("p out of range\n");
if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
INTELPllInvalid ("m2 out of range\n");
if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
INTELPllInvalid ("m1 out of range\n");
if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
INTELPllInvalid ("m1 <= m2\n");
if (clock->m < limit->m.min || limit->m.max < clock->m)
INTELPllInvalid ("m out of range\n");
if (clock->n < limit->n.min || limit->n.max < clock->n)
INTELPllInvalid ("n out of range\n");
if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
INTELPllInvalid ("vco out of range\n");
/* XXX: We may need to be checking "Dot clock" depending on the multiplier,
* connector, etc., rather than just a single range.
*/
if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
INTELPllInvalid ("dot out of range\n");

return true;
}

static bool
intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock)

{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
intel_clock_t clock;
int err = target;

if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
(I915_READ(LVDS)) != 0) {
/*
* For LVDS, if the panel is on, just rely on its current
* settings for dual-channel. We haven't figured out how to
* reliably set up different single/dual channel state, if we
* even can.
*/
if ((I915_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
LVDS_CLKB_POWER_UP)
clock.p2 = limit->p2.p2_fast;
else
clock.p2 = limit->p2.p2_slow;
} else {
if (target < limit->p2.dot_limit)
clock.p2 = limit->p2.p2_slow;
else
clock.p2 = limit->p2.p2_fast;
}

memset (best_clock, 0, sizeof (*best_clock));

for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
clock.m1++) {
for (clock.m2 = limit->m2.min;
clock.m2 <= limit->m2.max; clock.m2++) {
/* m1 is always 0 in Pineview */
if (clock.m2 >= clock.m1 && !IS_PINEVIEW(dev))
break;
for (clock.n = limit->n.min;
clock.n <= limit->n.max; clock.n++) {
for (clock.p1 = limit->p1.min;
clock.p1 <= limit->p1.max; clock.p1++) {
int this_err;

intel_clock(dev, refclk, &clock);
if (!intel_PLL_is_valid(dev, limit,
&clock))
continue;

this_err = abs(clock.dot - target);
if (this_err < err) {
*best_clock = clock;
err = this_err;
}
}
}
}
}

return (err != target);
}

static bool
intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
intel_clock_t clock;
int max_n;
bool found;
/* approximately equals target * 0.00585 */
int err_most = (target >> 8) + (target >> 9);
found = false;

if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
int lvds_reg;

if (HAS_PCH_SPLIT(dev))
lvds_reg = PCH_LVDS;
else
lvds_reg = LVDS;
if ((I915_READ(lvds_reg) & LVDS_CLKB_POWER_MASK) ==
LVDS_CLKB_POWER_UP)
clock.p2 = limit->p2.p2_fast;
else
clock.p2 = limit->p2.p2_slow;
} else {
if (target < limit->p2.dot_limit)
clock.p2 = limit->p2.p2_slow;
else
clock.p2 = limit->p2.p2_fast;
}

memset(best_clock, 0, sizeof(*best_clock));
max_n = limit->n.max;
/* based on hardware requirement, prefer smaller n to precision */
for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
/* based on hardware requirement, prefere larger m1,m2 */
for (clock.m1 = limit->m1.max;
clock.m1 >= limit->m1.min; clock.m1--) {
for (clock.m2 = limit->m2.max;
clock.m2 >= limit->m2.min; clock.m2--) {
for (clock.p1 = limit->p1.max;
clock.p1 >= limit->p1.min; clock.p1--) {
int this_err;

intel_clock(dev, refclk, &clock);
if (!intel_PLL_is_valid(dev, limit,
&clock))
continue;

this_err = abs(clock.dot - target);
if (this_err < err_most) {
*best_clock = clock;
err_most = this_err;
max_n = clock.n;
found = true;
}
}
}
}
}
return found;
}

static bool
intel_find_pll_ironlake_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock)
{
struct drm_device *dev = crtc->dev;
intel_clock_t clock;

if (target < 200000) {
clock.n = 1;
clock.p1 = 2;
clock.p2 = 10;
clock.m1 = 12;
clock.m2 = 9;
} else {
clock.n = 2;
clock.p1 = 1;
clock.p2 = 10;
clock.m1 = 14;
clock.m2 = 8;
}
intel_clock(dev, refclk, &clock);
memcpy(best_clock, &clock, sizeof(intel_clock_t));
return true;
}

/* DisplayPort has only two frequencies, 162MHz and 270MHz */
static bool
intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
int target, int refclk, intel_clock_t *best_clock)
{
intel_clock_t clock;
if (target < 200000) {
clock.p1 = 2;
clock.p2 = 10;
clock.n = 2;
clock.m1 = 23;
clock.m2 = 8;
} else {
clock.p1 = 1;
clock.p2 = 10;
clock.n = 1;
clock.m1 = 14;
clock.m2 = 2;
}
clock.m = 5 * (clock.m1 + 2) + (clock.m2 + 2);
clock.p = (clock.p1 * clock.p2);
clock.dot = 96000 * clock.m / (clock.n + 2) / clock.p;
clock.vco = 0;
memcpy(best_clock, &clock, sizeof(intel_clock_t));
return true;
}

/**
* intel_wait_for_vblank - wait for vblank on a given pipe
* @dev: drm device
* @pipe: pipe to wait for
*
* Wait for vblank to occur on a given pipe. Needed for various bits of
* mode setting code.
*/
void intel_wait_for_vblank(struct drm_device *dev, int pipe)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int pipestat_reg = (pipe == 0 ? PIPEASTAT : PIPEBSTAT);

/* Clear existing vblank status. Note this will clear any other
* sticky status fields as well.
*
* This races with i915_driver_irq_handler() with the result
* that either function could miss a vblank event. Here it is not
* fatal, as we will either wait upon the next vblank interrupt or
* timeout. Generally speaking intel_wait_for_vblank() is only
* called during modeset at which time the GPU should be idle and
* should *not* be performing page flips and thus not waiting on
* vblanks...
* Currently, the result of us stealing a vblank from the irq
* handler is that a single frame will be skipped during swapbuffers.
*/
I915_WRITE(pipestat_reg,
I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);

/* Wait for vblank interrupt bit to set */
if (wait_for(I915_READ(pipestat_reg) &
PIPE_VBLANK_INTERRUPT_STATUS,
50))
DRM_DEBUG_KMS("vblank wait timed out\n");
}

/*
* intel_wait_for_pipe_off - wait for pipe to turn off
* @dev: drm device
* @pipe: pipe to wait for
*
* After disabling a pipe, we can't wait for vblank in the usual way,
* spinning on the vblank interrupt status bit, since we won't actually
* see an interrupt when the pipe is disabled.
*
* On Gen4 and above:
* wait for the pipe register state bit to turn off
*
* Otherwise:
* wait for the display line value to settle (it usually
* ends up stopping at the start of the next frame).
*
*/
void intel_wait_for_pipe_off(struct drm_device *dev, int pipe)
{
struct drm_i915_private *dev_priv = dev->dev_private;

if (INTEL_INFO(dev)->gen >= 4) {
int reg = PIPECONF(pipe);

/* Wait for the Pipe State to go off */
if (wait_for((I915_READ(reg) & I965_PIPECONF_ACTIVE) == 0,
100))
DRM_DEBUG_KMS("pipe_off wait timed out\n");
} else {
u32 last_line;
int reg = PIPEDSL(pipe);
unsigned long timeout = jiffies + msecs_to_jiffies(100);

/* Wait for the display line to settle */
do {
last_line = I915_READ(reg) & DSL_LINEMASK;
mdelay(5);
} while (((I915_READ(reg) & DSL_LINEMASK) != last_line) &&
time_after(timeout, jiffies));
if (time_after(jiffies, timeout))
DRM_DEBUG_KMS("pipe_off wait timed out\n");
}
}

static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_framebuffer *fb = crtc->fb;
struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
struct drm_i915_gem_object *obj = intel_fb->obj;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int plane, i;
u32 fbc_ctl, fbc_ctl2;

if (fb->pitch == dev_priv->cfb_pitch &&
obj->fence_reg == dev_priv->cfb_fence &&
intel_crtc->plane == dev_priv->cfb_plane &&
I915_READ(FBC_CONTROL) & FBC_CTL_EN)
return;

i8xx_disable_fbc(dev);

dev_priv->cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE;

if (fb->pitch < dev_priv->cfb_pitch)
dev_priv->cfb_pitch = fb->pitch;

/* FBC_CTL wants 64B units */
dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
dev_priv->cfb_fence = obj->fence_reg;
dev_priv->cfb_plane = intel_crtc->plane;
plane = dev_priv->cfb_plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;

/* Clear old tags */
for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
I915_WRITE(FBC_TAG + (i * 4), 0);

/* Set it up... */
fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | plane;
if (obj->tiling_mode != I915_TILING_NONE)
fbc_ctl2 |= FBC_CTL_CPU_FENCE;
I915_WRITE(FBC_CONTROL2, fbc_ctl2);
I915_WRITE(FBC_FENCE_OFF, crtc->y);

/* enable it... */
fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;
if (IS_I945GM(dev))
fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
fbc_ctl |= (dev_priv->cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;
if (obj->tiling_mode != I915_TILING_NONE)
fbc_ctl |= dev_priv->cfb_fence;
I915_WRITE(FBC_CONTROL, fbc_ctl);

DRM_DEBUG_KMS("enabled FBC, pitch %ld, yoff %d, plane %d, ",
dev_priv->cfb_pitch, crtc->y, dev_priv->cfb_plane);
}

void i8xx_disable_fbc(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 fbc_ctl;

/* Disable compression */
fbc_ctl = I915_READ(FBC_CONTROL);
if ((fbc_ctl & FBC_CTL_EN) == 0)
return;

fbc_ctl &= ~FBC_CTL_EN;
I915_WRITE(FBC_CONTROL, fbc_ctl);

/* Wait for compressing bit to clear */
if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
DRM_DEBUG_KMS("FBC idle timed out\n");
return;
}

DRM_DEBUG_KMS("disabled FBC\n");
}

static bool i8xx_fbc_enabled(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
}

static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_framebuffer *fb = crtc->fb;
struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
struct drm_i915_gem_object *obj = intel_fb->obj;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
unsigned long stall_watermark = 200;
u32 dpfc_ctl;

dpfc_ctl = I915_READ(DPFC_CONTROL);
if (dpfc_ctl & DPFC_CTL_EN) {
if (dev_priv->cfb_pitch == dev_priv->cfb_pitch / 64 - 1 &&
dev_priv->cfb_fence == obj->fence_reg &&
dev_priv->cfb_plane == intel_crtc->plane &&
dev_priv->cfb_y == crtc->y)
return;

I915_WRITE(DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN);
POSTING_READ(DPFC_CONTROL);
intel_wait_for_vblank(dev, intel_crtc->pipe);
}

dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
dev_priv->cfb_fence = obj->fence_reg;
dev_priv->cfb_plane = intel_crtc->plane;
dev_priv->cfb_y = crtc->y;

dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
if (obj->tiling_mode != I915_TILING_NONE) {
dpfc_ctl |= DPFC_CTL_FENCE_EN | dev_priv->cfb_fence;
I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
} else {
I915_WRITE(DPFC_CHICKEN, ~DPFC_HT_MODIFY);
}

I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
(stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
(interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
I915_WRITE(DPFC_FENCE_YOFF, crtc->y);

/* enable it... */
I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);

DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
}

void g4x_disable_fbc(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 dpfc_ctl;

/* Disable compression */
dpfc_ctl = I915_READ(DPFC_CONTROL);
if (dpfc_ctl & DPFC_CTL_EN) {
dpfc_ctl &= ~DPFC_CTL_EN;
I915_WRITE(DPFC_CONTROL, dpfc_ctl);

DRM_DEBUG_KMS("disabled FBC\n");
}
}

static bool g4x_fbc_enabled(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
}

static void sandybridge_blit_fbc_update(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 blt_ecoskpd;

/* Make sure blitter notifies FBC of writes */
__gen6_force_wake_get(dev_priv);
blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
GEN6_BLITTER_LOCK_SHIFT;
I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
GEN6_BLITTER_LOCK_SHIFT);
I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
POSTING_READ(GEN6_BLITTER_ECOSKPD);
__gen6_force_wake_put(dev_priv);
}

static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_framebuffer *fb = crtc->fb;
struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
struct drm_i915_gem_object *obj = intel_fb->obj;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
unsigned long stall_watermark = 200;
u32 dpfc_ctl;

dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
if (dpfc_ctl & DPFC_CTL_EN) {
if (dev_priv->cfb_pitch == dev_priv->cfb_pitch / 64 - 1 &&
dev_priv->cfb_fence == obj->fence_reg &&
dev_priv->cfb_plane == intel_crtc->plane &&
dev_priv->cfb_offset == obj->gtt_offset &&
dev_priv->cfb_y == crtc->y)
return;

I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN);
POSTING_READ(ILK_DPFC_CONTROL);
intel_wait_for_vblank(dev, intel_crtc->pipe);
}

dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;
dev_priv->cfb_fence = obj->fence_reg;
dev_priv->cfb_plane = intel_crtc->plane;
dev_priv->cfb_offset = obj->gtt_offset;
dev_priv->cfb_y = crtc->y;

dpfc_ctl &= DPFC_RESERVED;
dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
if (obj->tiling_mode != I915_TILING_NONE) {
dpfc_ctl |= (DPFC_CTL_FENCE_EN | dev_priv->cfb_fence);
I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
} else {
I915_WRITE(ILK_DPFC_CHICKEN, ~DPFC_HT_MODIFY);
}

I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
(stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
(interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
I915_WRITE(ILK_FBC_RT_BASE, obj->gtt_offset | ILK_FBC_RT_VALID);
/* enable it... */
I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);

if (IS_GEN6(dev)) {
I915_WRITE(SNB_DPFC_CTL_SA,
SNB_CPU_FENCE_ENABLE | dev_priv->cfb_fence);
I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
sandybridge_blit_fbc_update(dev);
}

DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
}

void ironlake_disable_fbc(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 dpfc_ctl;

/* Disable compression */
dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
if (dpfc_ctl & DPFC_CTL_EN) {
dpfc_ctl &= ~DPFC_CTL_EN;
I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);

DRM_DEBUG_KMS("disabled FBC\n");
}
}

static bool ironlake_fbc_enabled(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
}

bool intel_fbc_enabled(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

if (!dev_priv->display.fbc_enabled)
return false;

return dev_priv->display.fbc_enabled(dev);
}

void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
{
struct drm_i915_private *dev_priv = crtc->dev->dev_private;

if (!dev_priv->display.enable_fbc)
return;

dev_priv->display.enable_fbc(crtc, interval);
}

void intel_disable_fbc(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

if (!dev_priv->display.disable_fbc)
return;

dev_priv->display.disable_fbc(dev);
}

/**
* intel_update_fbc - enable/disable FBC as needed
* @dev: the drm_device
*
* Set up the framebuffer compression hardware at mode set time. We
* enable it if possible:
* - plane A only (on pre-965)
* - no pixel mulitply/line duplication
* - no alpha buffer discard
* - no dual wide
* - framebuffer <= 2048 in width, 1536 in height
*
* We can't assume that any compression will take place (worst case),
* so the compressed buffer has to be the same size as the uncompressed
* one. It also must reside (along with the line length buffer) in
* stolen memory.
*
* We need to enable/disable FBC on a global basis.
*/
static void intel_update_fbc(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc = NULL, *tmp_crtc;
struct intel_crtc *intel_crtc;
struct drm_framebuffer *fb;
struct intel_framebuffer *intel_fb;
struct drm_i915_gem_object *obj;

DRM_DEBUG_KMS("\n");

if (!i915_powersave)
return;

if (!I915_HAS_FBC(dev))
return;

/*
* If FBC is already on, we just have to verify that we can
* keep it that way...
* Need to disable if:
* - more than one pipe is active
* - changing FBC params (stride, fence, mode)
* - new fb is too large to fit in compressed buffer
* - going to an unsupported config (interlace, pixel multiply, etc.)
*/
list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
if (tmp_crtc->enabled) {
if (crtc) {
DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES;
goto out_disable;
}
crtc = tmp_crtc;
}
}

if (!crtc || crtc->fb == NULL) {
DRM_DEBUG_KMS("no output, disabling\n");
dev_priv->no_fbc_reason = FBC_NO_OUTPUT;
goto out_disable;
}

intel_crtc = to_intel_crtc(crtc);
fb = crtc->fb;
intel_fb = to_intel_framebuffer(fb);
obj = intel_fb->obj;

if (intel_fb->obj->base.size > dev_priv->cfb_size) {
DRM_DEBUG_KMS("framebuffer too large, disabling "
"compression\n");
dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL;
goto out_disable;
}
if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) ||
(crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) {
DRM_DEBUG_KMS("mode incompatible with compression, "
"disabling\n");
dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE;
goto out_disable;
}
if ((crtc->mode.hdisplay > 2048) ||
(crtc->mode.vdisplay > 1536)) {
DRM_DEBUG_KMS("mode too large for compression, disabling\n");
dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE;
goto out_disable;
}
if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) {
DRM_DEBUG_KMS("plane not 0, disabling compression\n");
dev_priv->no_fbc_reason = FBC_BAD_PLANE;
goto out_disable;
}
if (obj->tiling_mode != I915_TILING_X) {
DRM_DEBUG_KMS("framebuffer not tiled, disabling compression\n");
dev_priv->no_fbc_reason = FBC_NOT_TILED;
goto out_disable;
}

/* If the kernel debugger is active, always disable compression */
if (in_dbg_master())
goto out_disable;

intel_enable_fbc(crtc, 500);
return;

out_disable:
/* Multiple disables should be harmless */
if (intel_fbc_enabled(dev)) {
DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
intel_disable_fbc(dev);
}
}

int
intel_pin_and_fence_fb_obj(struct drm_device *dev,
struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
{
u32 alignment;
int ret;

switch (obj->tiling_mode) {
case I915_TILING_NONE:
if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
alignment = 128 * 1024;
else if (INTEL_INFO(dev)->gen >= 4)
alignment = 4 * 1024;
else
alignment = 64 * 1024;
break;
case I915_TILING_X:
/* pin() will align the object as required by fence */
alignment = 0;
break;
case I915_TILING_Y:
/* FIXME: Is this true? */
DRM_ERROR("Y tiled not allowed for scan out buffers\n");
return -EINVAL;
default:
BUG();
}

ret = i915_gem_object_pin(obj, alignment, true);
if (ret)
return ret;

ret = i915_gem_object_set_to_display_plane(obj, pipelined);
if (ret)
goto err_unpin;

/* Install a fence for tiled scan-out. Pre-i965 always needs a
* fence, whereas 965+ only requires a fence if using
* framebuffer compression. For simplicity, we always install
* a fence as the cost is not that onerous.
*/
if (obj->tiling_mode != I915_TILING_NONE) {
ret = i915_gem_object_get_fence(obj, pipelined, false);
if (ret)
goto err_unpin;
}

return 0;

err_unpin:
i915_gem_object_unpin(obj);
return ret;
}

/* Assume fb object is pinned & idle & fenced and just update base pointers */
static int
intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
int x, int y, enum mode_set_atomic state)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_framebuffer *intel_fb;
struct drm_i915_gem_object *obj;
int plane = intel_crtc->plane;
unsigned long Start, Offset;
u32 dspcntr;
u32 reg;

switch (plane) {
case 0:
case 1:
break;
default:
DRM_ERROR("Can't update plane %d in SAREA\n", plane);
return -EINVAL;
}

intel_fb = to_intel_framebuffer(fb);
obj = intel_fb->obj;

reg = DSPCNTR(plane);
dspcntr = I915_READ(reg);
/* Mask out pixel format bits in case we change it */
dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
switch (fb->bits_per_pixel) {
case 8:
dspcntr |= DISPPLANE_8BPP;
break;
case 16:
if (fb->depth == 15)
dspcntr |= DISPPLANE_15_16BPP;
else
dspcntr |= DISPPLANE_16BPP;
break;
case 24:
case 32:
dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
break;
default:
DRM_ERROR("Unknown color depth\n");
return -EINVAL;
}
if (INTEL_INFO(dev)->gen >= 4) {
if (obj->tiling_mode != I915_TILING_NONE)
dspcntr |= DISPPLANE_TILED;
else
dspcntr &= ~DISPPLANE_TILED;
}

if (HAS_PCH_SPLIT(dev))
/* must disable */
dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;

I915_WRITE(reg, dspcntr);

Start = obj->gtt_offset;
Offset = y * fb->pitch + x * (fb->bits_per_pixel / 8);

DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
Start, Offset, x, y, fb->pitch);
I915_WRITE(DSPSTRIDE(plane), fb->pitch);
if (INTEL_INFO(dev)->gen >= 4) {
I915_WRITE(DSPSURF(plane), Start);
I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
I915_WRITE(DSPADDR(plane), Offset);
} else
I915_WRITE(DSPADDR(plane), Start + Offset);
POSTING_READ(reg);

intel_update_fbc(dev);
intel_increase_pllclock(crtc);

return 0;
}

static int
intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_master_private *master_priv;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int ret;

/* no fb bound */
if (!crtc->fb) {
DRM_DEBUG_KMS("No FB bound\n");
return 0;
}

switch (intel_crtc->plane) {
case 0:
case 1:
break;
default:
return -EINVAL;
}

mutex_lock(&dev->struct_mutex);
ret = intel_pin_and_fence_fb_obj(dev,
to_intel_framebuffer(crtc->fb)->obj,
NULL);
if (ret != 0) {
mutex_unlock(&dev->struct_mutex);
return ret;
}

if (old_fb) {
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;

wait_event(dev_priv->pending_flip_queue,
atomic_read(&obj->pending_flip) == 0);

/* Big Hammer, we also need to ensure that any pending
* MI_WAIT_FOR_EVENT inside a user batch buffer on the
* current scanout is retired before unpinning the old
* framebuffer.
*/
ret = i915_gem_object_flush_gpu(obj, false);
if (ret) {
i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
mutex_unlock(&dev->struct_mutex);
return ret;
}
}

ret = intel_pipe_set_base_atomic(crtc, crtc->fb, x, y,
LEAVE_ATOMIC_MODE_SET);
if (ret) {
i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
mutex_unlock(&dev->struct_mutex);
return ret;
}

if (old_fb) {
intel_wait_for_vblank(dev, intel_crtc->pipe);
i915_gem_object_unpin(to_intel_framebuffer(old_fb)->obj);
}

mutex_unlock(&dev->struct_mutex);

if (!dev->primary->master)
return 0;

master_priv = dev->primary->master->driver_priv;
if (!master_priv->sarea_priv)
return 0;

if (intel_crtc->pipe) {
master_priv->sarea_priv->pipeB_x = x;
master_priv->sarea_priv->pipeB_y = y;
} else {
master_priv->sarea_priv->pipeA_x = x;
master_priv->sarea_priv->pipeA_y = y;
}

return 0;
}

static void ironlake_set_pll_edp(struct drm_crtc *crtc, int clock)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 dpa_ctl;

DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", clock);
dpa_ctl = I915_READ(DP_A);
dpa_ctl &= ~DP_PLL_FREQ_MASK;

if (clock < 200000) {
u32 temp;
dpa_ctl |= DP_PLL_FREQ_160MHZ;
/* workaround for 160Mhz:
1) program 0x4600c bits 15:0 = 0x8124
2) program 0x46010 bit 0 = 1
3) program 0x46034 bit 24 = 1
4) program 0x64000 bit 14 = 1
*/
temp = I915_READ(0x4600c);
temp &= 0xffff0000;
I915_WRITE(0x4600c, temp | 0x8124);

temp = I915_READ(0x46010);
I915_WRITE(0x46010, temp | 1);

temp = I915_READ(0x46034);
I915_WRITE(0x46034, temp | (1 << 24));
} else {
dpa_ctl |= DP_PLL_FREQ_270MHZ;
}
I915_WRITE(DP_A, dpa_ctl);

POSTING_READ(DP_A);
udelay(500);
}

static void intel_fdi_normal_train(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
u32 reg, temp;

/* enable normal train */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
I915_WRITE(reg, temp);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
if (HAS_PCH_CPT(dev)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_NORMAL_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_NONE;
}
I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);

/* wait one idle pattern time */
POSTING_READ(reg);
udelay(1000);
}

/* The FDI link training functions for ILK/Ibexpeak. */
static void ironlake_fdi_link_train(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
u32 reg, temp, tries;

/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = I915_READ(reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
I915_WRITE(reg, temp);
I915_READ(reg);
udelay(150);

/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~(7 << 19);
temp |= (intel_crtc->fdi_lanes - 1) << 19;
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
I915_WRITE(reg, temp | FDI_TX_ENABLE);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
I915_WRITE(reg, temp | FDI_RX_ENABLE);

POSTING_READ(reg);
udelay(150);

/* Ironlake workaround, enable clock pointer after FDI enable*/
I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_ENABLE);

reg = FDI_RX_IIR(pipe);
for (tries = 0; tries < 5; tries++) {
temp = I915_READ(reg);
DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);

if ((temp & FDI_RX_BIT_LOCK)) {
DRM_DEBUG_KMS("FDI train 1 done.\n");
I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
break;
}
}
if (tries == 5)
DRM_ERROR("FDI train 1 fail!\n");

/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
I915_WRITE(reg, temp);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
I915_WRITE(reg, temp);

POSTING_READ(reg);
udelay(150);

reg = FDI_RX_IIR(pipe);
for (tries = 0; tries < 5; tries++) {
temp = I915_READ(reg);
DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);

if (temp & FDI_RX_SYMBOL_LOCK) {
I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
DRM_DEBUG_KMS("FDI train 2 done.\n");
break;
}
}
if (tries == 5)
DRM_ERROR("FDI train 2 fail!\n");

DRM_DEBUG_KMS("FDI train done\n");

}

static const int const snb_b_fdi_train_param [] = {
FDI_LINK_TRAIN_400MV_0DB_SNB_B,
FDI_LINK_TRAIN_400MV_6DB_SNB_B,
FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
FDI_LINK_TRAIN_800MV_0DB_SNB_B,
};

/* The FDI link training functions for SNB/Cougarpoint. */
static void gen6_fdi_link_train(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
u32 reg, temp, i;

/* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
for train result */
reg = FDI_RX_IMR(pipe);
temp = I915_READ(reg);
temp &= ~FDI_RX_SYMBOL_LOCK;
temp &= ~FDI_RX_BIT_LOCK;
I915_WRITE(reg, temp);

POSTING_READ(reg);
udelay(150);

/* enable CPU FDI TX and PCH FDI RX */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~(7 << 19);
temp |= (intel_crtc->fdi_lanes - 1) << 19;
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
/* SNB-B */
temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
I915_WRITE(reg, temp | FDI_TX_ENABLE);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
if (HAS_PCH_CPT(dev)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
}
I915_WRITE(reg, temp | FDI_RX_ENABLE);

POSTING_READ(reg);
udelay(150);

for (i = 0; i < 4; i++ ) {
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[i];
I915_WRITE(reg, temp);

POSTING_READ(reg);
udelay(500);

reg = FDI_RX_IIR(pipe);
temp = I915_READ(reg);
DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);

if (temp & FDI_RX_BIT_LOCK) {
I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
DRM_DEBUG_KMS("FDI train 1 done.\n");
break;
}
}
if (i == 4)
DRM_ERROR("FDI train 1 fail!\n");

/* Train 2 */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
if (IS_GEN6(dev)) {
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
/* SNB-B */
temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
}
I915_WRITE(reg, temp);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
if (HAS_PCH_CPT(dev)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_2;
}
I915_WRITE(reg, temp);

POSTING_READ(reg);
udelay(150);

for (i = 0; i < 4; i++ ) {
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
temp |= snb_b_fdi_train_param[i];
I915_WRITE(reg, temp);

POSTING_READ(reg);
udelay(500);

reg = FDI_RX_IIR(pipe);
temp = I915_READ(reg);
DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);

if (temp & FDI_RX_SYMBOL_LOCK) {
I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
DRM_DEBUG_KMS("FDI train 2 done.\n");
break;
}
}
if (i == 4)
DRM_ERROR("FDI train 2 fail!\n");

DRM_DEBUG_KMS("FDI train done.\n");
}

static void ironlake_fdi_enable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
u32 reg, temp;

/* Write the TU size bits so error detection works */
I915_WRITE(FDI_RX_TUSIZE1(pipe),
I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);

/* enable PCH FDI RX PLL, wait warmup plus DMI latency */
reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~((0x7 << 19) | (0x7 << 16));
temp |= (intel_crtc->fdi_lanes - 1) << 19;
temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);

POSTING_READ(reg);
udelay(200);

/* Switch from Rawclk to PCDclk */
temp = I915_READ(reg);
I915_WRITE(reg, temp | FDI_PCDCLK);

POSTING_READ(reg);
udelay(200);

/* Enable CPU FDI TX PLL, always on for Ironlake */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
if ((temp & FDI_TX_PLL_ENABLE) == 0) {
I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);

POSTING_READ(reg);
udelay(100);
}
}

static void intel_flush_display_plane(struct drm_device *dev,
int plane)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg = DSPADDR(plane);
I915_WRITE(reg, I915_READ(reg));
}

/*
* When we disable a pipe, we need to clear any pending scanline wait events
* to avoid hanging the ring, which we assume we are waiting on.
*/
static void intel_clear_scanline_wait(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ring_buffer *ring;
u32 tmp;

if (IS_GEN2(dev))
/* Can't break the hang on i8xx */
return;

ring = LP_RING(dev_priv);
tmp = I915_READ_CTL(ring);
if (tmp & RING_WAIT)
I915_WRITE_CTL(ring, tmp);
}

static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
{
struct drm_i915_gem_object *obj;
struct drm_i915_private *dev_priv;

if (crtc->fb == NULL)
return;

obj = to_intel_framebuffer(crtc->fb)->obj;
dev_priv = crtc->dev->dev_private;
wait_event(dev_priv->pending_flip_queue,
atomic_read(&obj->pending_flip) == 0);
}

static void ironlake_crtc_enable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int plane = intel_crtc->plane;
u32 reg, temp;

if (intel_crtc->active)
return;

intel_crtc->active = true;
intel_update_watermarks(dev);

if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
temp = I915_READ(PCH_LVDS);
if ((temp & LVDS_PORT_EN) == 0)
I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
}

ironlake_fdi_enable(crtc);

/* Enable panel fitting for LVDS */
if (dev_priv->pch_pf_size &&
(intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) || HAS_eDP)) {
/* Force use of hard-coded filter coefficients
* as some pre-programmed values are broken,
* e.g. x201.
*/
I915_WRITE(pipe ? PFB_CTL_1 : PFA_CTL_1,
PF_ENABLE | PF_FILTER_MED_3x3);
I915_WRITE(pipe ? PFB_WIN_POS : PFA_WIN_POS,
dev_priv->pch_pf_pos);
I915_WRITE(pipe ? PFB_WIN_SZ : PFA_WIN_SZ,
dev_priv->pch_pf_size);
}

/* Enable CPU pipe */
reg = PIPECONF(pipe);
temp = I915_READ(reg);
if ((temp & PIPECONF_ENABLE) == 0) {
I915_WRITE(reg, temp | PIPECONF_ENABLE);
POSTING_READ(reg);
intel_wait_for_vblank(dev, intel_crtc->pipe);
}

/* configure and enable CPU plane */
reg = DSPCNTR(plane);
temp = I915_READ(reg);
if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
I915_WRITE(reg, temp | DISPLAY_PLANE_ENABLE);
intel_flush_display_plane(dev, plane);
}

/* For PCH output, training FDI link */
if (IS_GEN6(dev))
gen6_fdi_link_train(crtc);
else
ironlake_fdi_link_train(crtc);

/* enable PCH DPLL */
reg = PCH_DPLL(pipe);
temp = I915_READ(reg);
if ((temp & DPLL_VCO_ENABLE) == 0) {
I915_WRITE(reg, temp | DPLL_VCO_ENABLE);
POSTING_READ(reg);
udelay(200);
}

if (HAS_PCH_CPT(dev)) {
/* Be sure PCH DPLL SEL is set */
temp = I915_READ(PCH_DPLL_SEL);
if (pipe == 0 && (temp & TRANSA_DPLL_ENABLE) == 0)
temp |= (TRANSA_DPLL_ENABLE | TRANSA_DPLLA_SEL);
else if (pipe == 1 && (temp & TRANSB_DPLL_ENABLE) == 0)
temp |= (TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
I915_WRITE(PCH_DPLL_SEL, temp);
}

/* set transcoder timing */
I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
I915_WRITE(TRANS_HSYNC(pipe), I915_READ(HSYNC(pipe)));

I915_WRITE(TRANS_VTOTAL(pipe), I915_READ(VTOTAL(pipe)));
I915_WRITE(TRANS_VBLANK(pipe), I915_READ(VBLANK(pipe)));
I915_WRITE(TRANS_VSYNC(pipe), I915_READ(VSYNC(pipe)));

intel_fdi_normal_train(crtc);

/* For PCH DP, enable TRANS_DP_CTL */
if (HAS_PCH_CPT(dev) &&
intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
reg = TRANS_DP_CTL(pipe);
temp = I915_READ(reg);
temp &= ~(TRANS_DP_PORT_SEL_MASK |
TRANS_DP_SYNC_MASK |
TRANS_DP_BPC_MASK);
temp |= (TRANS_DP_OUTPUT_ENABLE |
TRANS_DP_ENH_FRAMING);
temp |= TRANS_DP_8BPC;

if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;

switch (intel_trans_dp_port_sel(crtc)) {
case PCH_DP_B:
temp |= TRANS_DP_PORT_SEL_B;
break;
case PCH_DP_C:
temp |= TRANS_DP_PORT_SEL_C;
break;
case PCH_DP_D:
temp |= TRANS_DP_PORT_SEL_D;
break;
default:
DRM_DEBUG_KMS("Wrong PCH DP port return. Guess port B\n");
temp |= TRANS_DP_PORT_SEL_B;
break;
}

I915_WRITE(reg, temp);
}

/* enable PCH transcoder */
reg = TRANSCONF(pipe);
temp = I915_READ(reg);
/*
* make the BPC in transcoder be consistent with
* that in pipeconf reg.
*/
temp &= ~PIPE_BPC_MASK;
temp |= I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK;
I915_WRITE(reg, temp | TRANS_ENABLE);
if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
DRM_ERROR("failed to enable transcoder %d\n", pipe);

intel_crtc_load_lut(crtc);
intel_update_fbc(dev);
intel_crtc_update_cursor(crtc, true);
}

static void ironlake_crtc_disable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int plane = intel_crtc->plane;
u32 reg, temp;

if (!intel_crtc->active)
return;

intel_crtc_wait_for_pending_flips(crtc);
drm_vblank_off(dev, pipe);
intel_crtc_update_cursor(crtc, false);

/* Disable display plane */
reg = DSPCNTR(plane);
temp = I915_READ(reg);
if (temp & DISPLAY_PLANE_ENABLE) {
I915_WRITE(reg, temp & ~DISPLAY_PLANE_ENABLE);
intel_flush_display_plane(dev, plane);
}

if (dev_priv->cfb_plane == plane &&
dev_priv->display.disable_fbc)
dev_priv->display.disable_fbc(dev);

/* disable cpu pipe, disable after all planes disabled */
reg = PIPECONF(pipe);
temp = I915_READ(reg);
if (temp & PIPECONF_ENABLE) {
I915_WRITE(reg, temp & ~PIPECONF_ENABLE);
POSTING_READ(reg);
/* wait for cpu pipe off, pipe state */
intel_wait_for_pipe_off(dev, intel_crtc->pipe);
}

/* Disable PF */
I915_WRITE(pipe ? PFB_CTL_1 : PFA_CTL_1, 0);
I915_WRITE(pipe ? PFB_WIN_SZ : PFA_WIN_SZ, 0);

/* disable CPU FDI tx and PCH FDI rx */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
POSTING_READ(reg);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~(0x7 << 16);
temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
I915_WRITE(reg, temp & ~FDI_RX_ENABLE);

POSTING_READ(reg);
udelay(100);

/* Ironlake workaround, disable clock pointer after downing FDI */
if (HAS_PCH_IBX(dev))
I915_WRITE(FDI_RX_CHICKEN(pipe),
I915_READ(FDI_RX_CHICKEN(pipe) &
~FDI_RX_PHASE_SYNC_POINTER_ENABLE));

/* still set train pattern 1 */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
I915_WRITE(reg, temp);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
if (HAS_PCH_CPT(dev)) {
temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
} else {
temp &= ~FDI_LINK_TRAIN_NONE;
temp |= FDI_LINK_TRAIN_PATTERN_1;
}
/* BPC in FDI rx is consistent with that in PIPECONF */
temp &= ~(0x07 << 16);
temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
I915_WRITE(reg, temp);

POSTING_READ(reg);
udelay(100);

if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
temp = I915_READ(PCH_LVDS);
if (temp & LVDS_PORT_EN) {
I915_WRITE(PCH_LVDS, temp & ~LVDS_PORT_EN);
POSTING_READ(PCH_LVDS);
udelay(100);
}
}

/* disable PCH transcoder */
reg = TRANSCONF(plane);
temp = I915_READ(reg);
if (temp & TRANS_ENABLE) {
I915_WRITE(reg, temp & ~TRANS_ENABLE);
/* wait for PCH transcoder off, transcoder state */
if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
DRM_ERROR("failed to disable transcoder\n");
}

if (HAS_PCH_CPT(dev)) {
/* disable TRANS_DP_CTL */
reg = TRANS_DP_CTL(pipe);
temp = I915_READ(reg);
temp &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK);
I915_WRITE(reg, temp);

/* disable DPLL_SEL */
temp = I915_READ(PCH_DPLL_SEL);
if (pipe == 0)
temp &= ~(TRANSA_DPLL_ENABLE | TRANSA_DPLLB_SEL);
else
temp &= ~(TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL);
I915_WRITE(PCH_DPLL_SEL, temp);
}

/* disable PCH DPLL */
reg = PCH_DPLL(pipe);
temp = I915_READ(reg);
I915_WRITE(reg, temp & ~DPLL_VCO_ENABLE);

/* Switch from PCDclk to Rawclk */
reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
I915_WRITE(reg, temp & ~FDI_PCDCLK);

/* Disable CPU FDI TX PLL */
reg = FDI_TX_CTL(pipe);
temp = I915_READ(reg);
I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);

POSTING_READ(reg);
udelay(100);

reg = FDI_RX_CTL(pipe);
temp = I915_READ(reg);
I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);

/* Wait for the clocks to turn off. */
POSTING_READ(reg);
udelay(100);

intel_crtc->active = false;
intel_update_watermarks(dev);
intel_update_fbc(dev);
intel_clear_scanline_wait(dev);
}

static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int plane = intel_crtc->plane;

/* XXX: When our outputs are all unaware of DPMS modes other than off
* and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
*/
switch (mode) {
case DRM_MODE_DPMS_ON:
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
DRM_DEBUG_KMS("crtc %d/%d dpms on\n", pipe, plane);
ironlake_crtc_enable(crtc);
break;

case DRM_MODE_DPMS_OFF:
DRM_DEBUG_KMS("crtc %d/%d dpms off\n", pipe, plane);
ironlake_crtc_disable(crtc);
break;
}
}

static void intel_crtc_dpms_overlay(struct intel_crtc *intel_crtc, bool enable)
{
if (!enable && intel_crtc->overlay) {
struct drm_device *dev = intel_crtc->base.dev;

mutex_lock(&dev->struct_mutex);
(void) intel_overlay_switch_off(intel_crtc->overlay, false);
mutex_unlock(&dev->struct_mutex);
}

/* Let userspace switch the overlay on again. In most cases userspace
* has to recompute where to put it anyway.
*/
}

static void i9xx_crtc_enable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int plane = intel_crtc->plane;
u32 reg, temp;

if (intel_crtc->active)
return;

intel_crtc->active = true;
intel_update_watermarks(dev);

/* Enable the DPLL */
reg = DPLL(pipe);
temp = I915_READ(reg);
if ((temp & DPLL_VCO_ENABLE) == 0) {
I915_WRITE(reg, temp);

/* Wait for the clocks to stabilize. */
POSTING_READ(reg);
udelay(150);

I915_WRITE(reg, temp | DPLL_VCO_ENABLE);

/* Wait for the clocks to stabilize. */
POSTING_READ(reg);
udelay(150);

I915_WRITE(reg, temp | DPLL_VCO_ENABLE);

/* Wait for the clocks to stabilize. */
POSTING_READ(reg);
udelay(150);
}

/* Enable the pipe */
reg = PIPECONF(pipe);
temp = I915_READ(reg);
if ((temp & PIPECONF_ENABLE) == 0)
I915_WRITE(reg, temp | PIPECONF_ENABLE);

/* Enable the plane */
reg = DSPCNTR(plane);
temp = I915_READ(reg);
if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
I915_WRITE(reg, temp | DISPLAY_PLANE_ENABLE);
intel_flush_display_plane(dev, plane);
}

intel_crtc_load_lut(crtc);
intel_update_fbc(dev);

/* Give the overlay scaler a chance to enable if it's on this pipe */
intel_crtc_dpms_overlay(intel_crtc, true);
intel_crtc_update_cursor(crtc, true);
}

static void i9xx_crtc_disable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int plane = intel_crtc->plane;
u32 reg, temp;

if (!intel_crtc->active)
return;

/* Give the overlay scaler a chance to disable if it's on this pipe */
intel_crtc_wait_for_pending_flips(crtc);
drm_vblank_off(dev, pipe);
intel_crtc_dpms_overlay(intel_crtc, false);
intel_crtc_update_cursor(crtc, false);

if (dev_priv->cfb_plane == plane &&
dev_priv->display.disable_fbc)
dev_priv->display.disable_fbc(dev);

/* Disable display plane */
reg = DSPCNTR(plane);
temp = I915_READ(reg);
if (temp & DISPLAY_PLANE_ENABLE) {
I915_WRITE(reg, temp & ~DISPLAY_PLANE_ENABLE);
/* Flush the plane changes */
intel_flush_display_plane(dev, plane);

/* Wait for vblank for the disable to take effect */
if (IS_GEN2(dev))
intel_wait_for_vblank(dev, pipe);
}

/* Don't disable pipe A or pipe A PLLs if needed */
if (pipe == 0 && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
goto done;

/* Next, disable display pipes */
reg = PIPECONF(pipe);
temp = I915_READ(reg);
if (temp & PIPECONF_ENABLE) {
I915_WRITE(reg, temp & ~PIPECONF_ENABLE);

/* Wait for the pipe to turn off */
POSTING_READ(reg);
intel_wait_for_pipe_off(dev, pipe);
}

reg = DPLL(pipe);
temp = I915_READ(reg);
if (temp & DPLL_VCO_ENABLE) {
I915_WRITE(reg, temp & ~DPLL_VCO_ENABLE);

/* Wait for the clocks to turn off. */
POSTING_READ(reg);
udelay(150);
}

done:
intel_crtc->active = false;
intel_update_fbc(dev);
intel_update_watermarks(dev);
intel_clear_scanline_wait(dev);
}

static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode)
{
/* XXX: When our outputs are all unaware of DPMS modes other than off
* and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
*/
switch (mode) {
case DRM_MODE_DPMS_ON:
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
i9xx_crtc_enable(crtc);
break;
case DRM_MODE_DPMS_OFF:
i9xx_crtc_disable(crtc);
break;
}
}

/**
* Sets the power management mode of the pipe and plane.
*/
static void intel_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_master_private *master_priv;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
bool enabled;

if (intel_crtc->dpms_mode == mode)
return;

intel_crtc->dpms_mode = mode;

dev_priv->display.dpms(crtc, mode);

if (!dev->primary->master)
return;

master_priv = dev->primary->master->driver_priv;
if (!master_priv->sarea_priv)
return;

enabled = crtc->enabled && mode != DRM_MODE_DPMS_OFF;

switch (pipe) {
case 0:
master_priv->sarea_priv->pipeA_w = enabled ? crtc->mode.hdisplay : 0;
master_priv->sarea_priv->pipeA_h = enabled ? crtc->mode.vdisplay : 0;
break;
case 1:
master_priv->sarea_priv->pipeB_w = enabled ? crtc->mode.hdisplay : 0;
master_priv->sarea_priv->pipeB_h = enabled ? crtc->mode.vdisplay : 0;
break;
default:
DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);
break;
}
}

static void intel_crtc_disable(struct drm_crtc *crtc)
{
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
struct drm_device *dev = crtc->dev;

crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);

if (crtc->fb) {
mutex_lock(&dev->struct_mutex);
i915_gem_object_unpin(to_intel_framebuffer(crtc->fb)->obj);
mutex_unlock(&dev->struct_mutex);
}
}

/* Prepare for a mode set.
*
* Note we could be a lot smarter here. We need to figure out which outputs
* will be enabled, which disabled (in short, how the config will changes)
* and perform the minimum necessary steps to accomplish that, e.g. updating
* watermarks, FBC configuration, making sure PLLs are programmed correctly,
* panel fitting is in the proper state, etc.
*/
static void i9xx_crtc_prepare(struct drm_crtc *crtc)
{
i9xx_crtc_disable(crtc);
}

static void i9xx_crtc_commit(struct drm_crtc *crtc)
{
i9xx_crtc_enable(crtc);
}

static void ironlake_crtc_prepare(struct drm_crtc *crtc)
{
ironlake_crtc_disable(crtc);
}

static void ironlake_crtc_commit(struct drm_crtc *crtc)
{
ironlake_crtc_enable(crtc);
}

void intel_encoder_prepare (struct drm_encoder *encoder)
{
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
/* lvds has its own version of prepare see intel_lvds_prepare */
encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
}

void intel_encoder_commit (struct drm_encoder *encoder)
{
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
/* lvds has its own version of commit see intel_lvds_commit */
encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
}

void intel_encoder_destroy(struct drm_encoder *encoder)
{
struct intel_encoder *intel_encoder = to_intel_encoder(encoder);

drm_encoder_cleanup(encoder);
kfree(intel_encoder);
}

static bool intel_crtc_mode_fixup(struct drm_crtc *crtc,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = crtc->dev;

if (HAS_PCH_SPLIT(dev)) {
/* FDI link clock is fixed at 2.7G */
if (mode->clock * 3 > IRONLAKE_FDI_FREQ * 4)
return false;
}

/* XXX some encoders set the crtcinfo, others don't.
* Obviously we need some form of conflict resolution here...
*/
if (adjusted_mode->crtc_htotal == 0)
drm_mode_set_crtcinfo(adjusted_mode, 0);

return true;
}

static int i945_get_display_clock_speed(struct drm_device *dev)
{
return 400000;
}

static int i915_get_display_clock_speed(struct drm_device *dev)
{
return 333000;
}

static int i9xx_misc_get_display_clock_speed(struct drm_device *dev)
{
return 200000;
}

static int i915gm_get_display_clock_speed(struct drm_device *dev)
{
u16 gcfgc = 0;

pci_read_config_word(dev->pdev, GCFGC, &gcfgc);

if (gcfgc & GC_LOW_FREQUENCY_ENABLE)
return 133000;
else {
switch (gcfgc & GC_DISPLAY_CLOCK_MASK) {
case GC_DISPLAY_CLOCK_333_MHZ:
return 333000;
default:
case GC_DISPLAY_CLOCK_190_200_MHZ:
return 190000;
}
}
}

static int i865_get_display_clock_speed(struct drm_device *dev)
{
return 266000;
}

static int i855_get_display_clock_speed(struct drm_device *dev)
{
u16 hpllcc = 0;
/* Assume that the hardware is in the high speed state. This
* should be the default.
*/
switch (hpllcc & GC_CLOCK_CONTROL_MASK) {
case GC_CLOCK_133_200:
case GC_CLOCK_100_200:
return 200000;
case GC_CLOCK_166_250:
return 250000;
case GC_CLOCK_100_133:
return 133000;
}

/* Shouldn't happen */
return 0;
}

static int i830_get_display_clock_speed(struct drm_device *dev)
{
return 133000;
}

struct fdi_m_n {
u32 tu;
u32 gmch_m;
u32 gmch_n;
u32 link_m;
u32 link_n;
};

static void
fdi_reduce_ratio(u32 *num, u32 *den)
{
while (*num > 0xffffff || *den > 0xffffff) {
*num >>= 1;
*den >>= 1;
}
}

static void
ironlake_compute_m_n(int bits_per_pixel, int nlanes, int pixel_clock,
int link_clock, struct fdi_m_n *m_n)
{
m_n->tu = 64; /* default size */

/* BUG_ON(pixel_clock > INT_MAX / 36); */
m_n->gmch_m = bits_per_pixel * pixel_clock;
m_n->gmch_n = link_clock * nlanes * 8;
fdi_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n);

m_n->link_m = pixel_clock;
m_n->link_n = link_clock;
fdi_reduce_ratio(&m_n->link_m, &m_n->link_n);
}

struct intel_watermark_params {
unsigned long fifo_size;
unsigned long max_wm;
unsigned long default_wm;
unsigned long guard_size;
unsigned long cacheline_size;
};

/* Pineview has different values for various configs */
static struct intel_watermark_params pineview_display_wm = {
PINEVIEW_DISPLAY_FIFO,
PINEVIEW_MAX_WM,
PINEVIEW_DFT_WM,
PINEVIEW_GUARD_WM,
PINEVIEW_FIFO_LINE_SIZE
};
static struct intel_watermark_params pineview_display_hplloff_wm = {
PINEVIEW_DISPLAY_FIFO,
PINEVIEW_MAX_WM,
PINEVIEW_DFT_HPLLOFF_WM,
PINEVIEW_GUARD_WM,
PINEVIEW_FIFO_LINE_SIZE
};
static struct intel_watermark_params pineview_cursor_wm = {
PINEVIEW_CURSOR_FIFO,
PINEVIEW_CURSOR_MAX_WM,
PINEVIEW_CURSOR_DFT_WM,
PINEVIEW_CURSOR_GUARD_WM,
PINEVIEW_FIFO_LINE_SIZE,
};
static struct intel_watermark_params pineview_cursor_hplloff_wm = {
PINEVIEW_CURSOR_FIFO,
PINEVIEW_CURSOR_MAX_WM,
PINEVIEW_CURSOR_DFT_WM,
PINEVIEW_CURSOR_GUARD_WM,
PINEVIEW_FIFO_LINE_SIZE
};
static struct intel_watermark_params g4x_wm_info = {
G4X_FIFO_SIZE,
G4X_MAX_WM,
G4X_MAX_WM,
2,
G4X_FIFO_LINE_SIZE,
};
static struct intel_watermark_params g4x_cursor_wm_info = {
I965_CURSOR_FIFO,
I965_CURSOR_MAX_WM,
I965_CURSOR_DFT_WM,
2,
G4X_FIFO_LINE_SIZE,
};
static struct intel_watermark_params i965_cursor_wm_info = {
I965_CURSOR_FIFO,
I965_CURSOR_MAX_WM,
I965_CURSOR_DFT_WM,
2,
I915_FIFO_LINE_SIZE,
};
static struct intel_watermark_params i945_wm_info = {
I945_FIFO_SIZE,
I915_MAX_WM,
1,
2,
I915_FIFO_LINE_SIZE
};
static struct intel_watermark_params i915_wm_info = {
I915_FIFO_SIZE,
I915_MAX_WM,
1,
2,
I915_FIFO_LINE_SIZE
};
static struct intel_watermark_params i855_wm_info = {
I855GM_FIFO_SIZE,
I915_MAX_WM,
1,
2,
I830_FIFO_LINE_SIZE
};
static struct intel_watermark_params i830_wm_info = {
I830_FIFO_SIZE,
I915_MAX_WM,
1,
2,
I830_FIFO_LINE_SIZE
};

static struct intel_watermark_params ironlake_display_wm_info = {
ILK_DISPLAY_FIFO,
ILK_DISPLAY_MAXWM,
ILK_DISPLAY_DFTWM,
2,
ILK_FIFO_LINE_SIZE
};

static struct intel_watermark_params ironlake_cursor_wm_info = {
ILK_CURSOR_FIFO,
ILK_CURSOR_MAXWM,
ILK_CURSOR_DFTWM,
2,
ILK_FIFO_LINE_SIZE
};

static struct intel_watermark_params ironlake_display_srwm_info = {
ILK_DISPLAY_SR_FIFO,
ILK_DISPLAY_MAX_SRWM,
ILK_DISPLAY_DFT_SRWM,
2,
ILK_FIFO_LINE_SIZE
};

static struct intel_watermark_params ironlake_cursor_srwm_info = {
ILK_CURSOR_SR_FIFO,
ILK_CURSOR_MAX_SRWM,
ILK_CURSOR_DFT_SRWM,
2,
ILK_FIFO_LINE_SIZE
};

static struct intel_watermark_params sandybridge_display_wm_info = {
SNB_DISPLAY_FIFO,
SNB_DISPLAY_MAXWM,
SNB_DISPLAY_DFTWM,
2,
SNB_FIFO_LINE_SIZE
};

static struct intel_watermark_params sandybridge_cursor_wm_info = {
SNB_CURSOR_FIFO,
SNB_CURSOR_MAXWM,
SNB_CURSOR_DFTWM,
2,
SNB_FIFO_LINE_SIZE
};

static struct intel_watermark_params sandybridge_display_srwm_info = {
SNB_DISPLAY_SR_FIFO,
SNB_DISPLAY_MAX_SRWM,
SNB_DISPLAY_DFT_SRWM,
2,
SNB_FIFO_LINE_SIZE
};

static struct intel_watermark_params sandybridge_cursor_srwm_info = {
SNB_CURSOR_SR_FIFO,
SNB_CURSOR_MAX_SRWM,
SNB_CURSOR_DFT_SRWM,
2,
SNB_FIFO_LINE_SIZE
};

/**
* intel_calculate_wm - calculate watermark level
* @clock_in_khz: pixel clock
* @wm: chip FIFO params
* @pixel_size: display pixel size
* @latency_ns: memory latency for the platform
*
* Calculate the watermark level (the level at which the display plane will
* start fetching from memory again). Each chip has a different display
* FIFO size and allocation, so the caller needs to figure that out and pass
* in the correct intel_watermark_params structure.
*
* As the pixel clock runs, the FIFO will be drained at a rate that depends
* on the pixel size. When it reaches the watermark level, it'll start
* fetching FIFO line sized based chunks from memory until the FIFO fills
* past the watermark point. If the FIFO drains completely, a FIFO underrun
* will occur, and a display engine hang could result.
*/
static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
struct intel_watermark_params *wm,
int pixel_size,
unsigned long latency_ns)
{
long entries_required, wm_size;

/*
* Note: we need to make sure we don't overflow for various clock &
* latency values.
* clocks go from a few thousand to several hundred thousand.
* latency is usually a few thousand
*/
entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
1000;
entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);

DRM_DEBUG_KMS("FIFO entries required for mode: %d\n", entries_required);

wm_size = wm->fifo_size - (entries_required + wm->guard_size);

DRM_DEBUG_KMS("FIFO watermark level: %d\n", wm_size);

/* Don't promote wm_size to unsigned... */
if (wm_size > (long)wm->max_wm)
wm_size = wm->max_wm;
if (wm_size <= 0)
wm_size = wm->default_wm;
return wm_size;
}

struct cxsr_latency {
int is_desktop;
int is_ddr3;
unsigned long fsb_freq;
unsigned long mem_freq;
unsigned long display_sr;
unsigned long display_hpll_disable;
unsigned long cursor_sr;
unsigned long cursor_hpll_disable;
};

static const struct cxsr_latency cxsr_latency_table[] = {
{1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
{1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
{1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
{1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
{1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */

{1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
{1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
{1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
{1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
{1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */

{1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
{1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
{1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
{1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
{1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */

{0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
{0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
{0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
{0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
{0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */

{0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
{0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
{0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
{0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
{0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */

{0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
{0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
{0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
{0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
{0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
};

static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
int is_ddr3,
int fsb,
int mem)
{
const struct cxsr_latency *latency;
int i;

if (fsb == 0 || mem == 0)
return NULL;

for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
latency = &cxsr_latency_table[i];
if (is_desktop == latency->is_desktop &&
is_ddr3 == latency->is_ddr3 &&
fsb == latency->fsb_freq && mem == latency->mem_freq)
return latency;
}

DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");

return NULL;
}

static void pineview_disable_cxsr(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

/* deactivate cxsr */
I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
}

/*
* Latency for FIFO fetches is dependent on several factors:
* - memory configuration (speed, channels)
* - chipset
* - current MCH state
* It can be fairly high in some situations, so here we assume a fairly
* pessimal value. It's a tradeoff between extra memory fetches (if we
* set this value too high, the FIFO will fetch frequently to stay full)
* and power consumption (set it too low to save power and we might see
* FIFO underruns and display "flicker").
*
* A value of 5us seems to be a good balance; safe for very low end
* platforms but not overly aggressive on lower latency configs.
*/
static const int latency_ns = 5000;

static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t dsparb = I915_READ(DSPARB);
int size;

size = dsparb & 0x7f;
if (plane)
size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;

DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
plane ? "B" : "A", size);

return size;
}

static int i85x_get_fifo_size(struct drm_device *dev, int plane)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t dsparb = I915_READ(DSPARB);
int size;

size = dsparb & 0x1ff;
if (plane)
size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
size >>= 1; /* Convert to cachelines */

DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
plane ? "B" : "A", size);

return size;
}

static int i845_get_fifo_size(struct drm_device *dev, int plane)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t dsparb = I915_READ(DSPARB);
int size;

size = dsparb & 0x7f;
size >>= 2; /* Convert to cachelines */

DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
plane ? "B" : "A",
size);

return size;
}

static int i830_get_fifo_size(struct drm_device *dev, int plane)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t dsparb = I915_READ(DSPARB);
int size;

size = dsparb & 0x7f;
size >>= 1; /* Convert to cachelines */

DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
plane ? "B" : "A", size);

return size;
}

static void pineview_update_wm(struct drm_device *dev, int planea_clock,
int planeb_clock, int sr_hdisplay, int unused,
int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
const struct cxsr_latency *latency;
u32 reg;
unsigned long wm;
int sr_clock;

latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
dev_priv->fsb_freq, dev_priv->mem_freq);
if (!latency) {
DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
pineview_disable_cxsr(dev);
return;
}

if (!planea_clock || !planeb_clock) {
sr_clock = planea_clock ? planea_clock : planeb_clock;

/* Display SR */
wm = intel_calculate_wm(sr_clock, &pineview_display_wm,
pixel_size, latency->display_sr);
reg = I915_READ(DSPFW1);
reg &= ~DSPFW_SR_MASK;
reg |= wm << DSPFW_SR_SHIFT;
I915_WRITE(DSPFW1, reg);
DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);

/* cursor SR */
wm = intel_calculate_wm(sr_clock, &pineview_cursor_wm,
pixel_size, latency->cursor_sr);
reg = I915_READ(DSPFW3);
reg &= ~DSPFW_CURSOR_SR_MASK;
reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
I915_WRITE(DSPFW3, reg);

/* Display HPLL off SR */
wm = intel_calculate_wm(sr_clock, &pineview_display_hplloff_wm,
pixel_size, latency->display_hpll_disable);
reg = I915_READ(DSPFW3);
reg &= ~DSPFW_HPLL_SR_MASK;
reg |= wm & DSPFW_HPLL_SR_MASK;
I915_WRITE(DSPFW3, reg);

/* cursor HPLL off SR */
wm = intel_calculate_wm(sr_clock, &pineview_cursor_hplloff_wm,
pixel_size, latency->cursor_hpll_disable);
reg = I915_READ(DSPFW3);
reg &= ~DSPFW_HPLL_CURSOR_MASK;
reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
I915_WRITE(DSPFW3, reg);
DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);

/* activate cxsr */
I915_WRITE(DSPFW3,
I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
DRM_DEBUG_KMS("Self-refresh is enabled\n");
} else {
pineview_disable_cxsr(dev);
DRM_DEBUG_KMS("Self-refresh is disabled\n");
}
}

static void g4x_update_wm(struct drm_device *dev, int planea_clock,
int planeb_clock, int sr_hdisplay, int sr_htotal,
int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int total_size, cacheline_size;
int planea_wm, planeb_wm, cursora_wm, cursorb_wm, cursor_sr;
struct intel_watermark_params planea_params, planeb_params;
unsigned long line_time_us;
int sr_clock, sr_entries = 0, entries_required;

/* Create copies of the base settings for each pipe */
planea_params = planeb_params = g4x_wm_info;

/* Grab a couple of global values before we overwrite them */
total_size = planea_params.fifo_size;
cacheline_size = planea_params.cacheline_size;

/*
* Note: we need to make sure we don't overflow for various clock &
* latency values.
* clocks go from a few thousand to several hundred thousand.
* latency is usually a few thousand
*/
entries_required = ((planea_clock / 1000) * pixel_size * latency_ns) /
1000;
entries_required = DIV_ROUND_UP(entries_required, G4X_FIFO_LINE_SIZE);
planea_wm = entries_required + planea_params.guard_size;

entries_required = ((planeb_clock / 1000) * pixel_size * latency_ns) /
1000;
entries_required = DIV_ROUND_UP(entries_required, G4X_FIFO_LINE_SIZE);
planeb_wm = entries_required + planeb_params.guard_size;

cursora_wm = cursorb_wm = 16;
cursor_sr = 32;

DRM_DEBUG("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);

/* Calc sr entries for one plane configs */
if (sr_hdisplay && (!planea_clock || !planeb_clock)) {
/* self-refresh has much higher latency */
static const int sr_latency_ns = 12000;

sr_clock = planea_clock ? planea_clock : planeb_clock;
line_time_us = ((sr_htotal * 1000) / sr_clock);

/* Use ns/us then divide to preserve precision */
sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
pixel_size * sr_hdisplay;
sr_entries = DIV_ROUND_UP(sr_entries, cacheline_size);

entries_required = (((sr_latency_ns / line_time_us) +
1000) / 1000) * pixel_size * 64;
entries_required = DIV_ROUND_UP(entries_required,
g4x_cursor_wm_info.cacheline_size);
cursor_sr = entries_required + g4x_cursor_wm_info.guard_size;

if (cursor_sr > g4x_cursor_wm_info.max_wm)
cursor_sr = g4x_cursor_wm_info.max_wm;
DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
"cursor %d\n", sr_entries, cursor_sr);

I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
} else {
/* Turn off self refresh if both pipes are enabled */
I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
& ~FW_BLC_SELF_EN);
}

DRM_DEBUG("Setting FIFO watermarks - A: %d, B: %d, SR %d\n",
planea_wm, planeb_wm, sr_entries);

planea_wm &= 0x3f;
planeb_wm &= 0x3f;

I915_WRITE(DSPFW1, (sr_entries << DSPFW_SR_SHIFT) |
(cursorb_wm << DSPFW_CURSORB_SHIFT) |
(planeb_wm << DSPFW_PLANEB_SHIFT) | planea_wm);
I915_WRITE(DSPFW2, (I915_READ(DSPFW2) & DSPFW_CURSORA_MASK) |
(cursora_wm << DSPFW_CURSORA_SHIFT));
/* HPLL off in SR has some issues on G4x... disable it */
I915_WRITE(DSPFW3, (I915_READ(DSPFW3) & ~DSPFW_HPLL_SR_EN) |
(cursor_sr << DSPFW_CURSOR_SR_SHIFT));
}

static void i965_update_wm(struct drm_device *dev, int planea_clock,
int planeb_clock, int sr_hdisplay, int sr_htotal,
int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
unsigned long line_time_us;
int sr_clock, sr_entries, srwm = 1;
int cursor_sr = 16;

/* Calc sr entries for one plane configs */
if (sr_hdisplay && (!planea_clock || !planeb_clock)) {
/* self-refresh has much higher latency */
static const int sr_latency_ns = 12000;

sr_clock = planea_clock ? planea_clock : planeb_clock;
line_time_us = ((sr_htotal * 1000) / sr_clock);

/* Use ns/us then divide to preserve precision */
sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
pixel_size * sr_hdisplay;
sr_entries = DIV_ROUND_UP(sr_entries, I915_FIFO_LINE_SIZE);
DRM_DEBUG("self-refresh entries: %d\n", sr_entries);
srwm = I965_FIFO_SIZE - sr_entries;
if (srwm < 0)
srwm = 1;
srwm &= 0x1ff;

sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
pixel_size * 64;
sr_entries = DIV_ROUND_UP(sr_entries,
i965_cursor_wm_info.cacheline_size);
cursor_sr = i965_cursor_wm_info.fifo_size -
(sr_entries + i965_cursor_wm_info.guard_size);

if (cursor_sr > i965_cursor_wm_info.max_wm)
cursor_sr = i965_cursor_wm_info.max_wm;

DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
"cursor %d\n", srwm, cursor_sr);

if (IS_CRESTLINE(dev))
I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
} else {
/* Turn off self refresh if both pipes are enabled */
if (IS_CRESTLINE(dev))
I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
& ~FW_BLC_SELF_EN);
}

DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
srwm);

/* 965 has limitations... */
I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) | (8 << 16) | (8 << 8) |
(8 << 0));
I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
/* update cursor SR watermark */
I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
}

static void i9xx_update_wm(struct drm_device *dev, int planea_clock,
int planeb_clock, int sr_hdisplay, int sr_htotal,
int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t fwater_lo;
uint32_t fwater_hi;
int total_size, cacheline_size, cwm, srwm = 1;
int planea_wm, planeb_wm;
struct intel_watermark_params planea_params, planeb_params;
unsigned long line_time_us;
int sr_clock, sr_entries = 0;

/* Create copies of the base settings for each pipe */
if (IS_CRESTLINE(dev) || IS_I945GM(dev))
planea_params = planeb_params = i945_wm_info;
else if (!IS_GEN2(dev))
planea_params = planeb_params = i915_wm_info;
else
planea_params = planeb_params = i855_wm_info;

/* Grab a couple of global values before we overwrite them */
total_size = planea_params.fifo_size;
cacheline_size = planea_params.cacheline_size;

/* Update per-plane FIFO sizes */
planea_params.fifo_size = dev_priv->display.get_fifo_size(dev, 0);
planeb_params.fifo_size = dev_priv->display.get_fifo_size(dev, 1);

planea_wm = intel_calculate_wm(planea_clock, &planea_params,
pixel_size, latency_ns);
planeb_wm = intel_calculate_wm(planeb_clock, &planeb_params,
pixel_size, latency_ns);
DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);

/*
* Overlay gets an aggressive default since video jitter is bad.
*/
cwm = 2;

/* Calc sr entries for one plane configs */
if (HAS_FW_BLC(dev) && sr_hdisplay &&
(!planea_clock || !planeb_clock)) {
/* self-refresh has much higher latency */
static const int sr_latency_ns = 6000;

sr_clock = planea_clock ? planea_clock : planeb_clock;
line_time_us = ((sr_htotal * 1000) / sr_clock);

/* Use ns/us then divide to preserve precision */
sr_entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
pixel_size * sr_hdisplay;
sr_entries = DIV_ROUND_UP(sr_entries, cacheline_size);
DRM_DEBUG_KMS("self-refresh entries: %d\n", sr_entries);
srwm = total_size - sr_entries;
if (srwm < 0)
srwm = 1;

if (IS_I945G(dev) || IS_I945GM(dev))
I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
else if (IS_I915GM(dev)) {
/* 915M has a smaller SRWM field */
I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN);
}
} else {
/* Turn off self refresh if both pipes are enabled */
if (IS_I945G(dev) || IS_I945GM(dev)) {
I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
& ~FW_BLC_SELF_EN);
} else if (IS_I915GM(dev)) {
I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN);
}
}

DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
planea_wm, planeb_wm, cwm, srwm);

fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
fwater_hi = (cwm & 0x1f);

/* Set request length to 8 cachelines per fetch */
fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
fwater_hi = fwater_hi | (1 << 8);

I915_WRITE(FW_BLC, fwater_lo);
I915_WRITE(FW_BLC2, fwater_hi);
}

static void i830_update_wm(struct drm_device *dev, int planea_clock, int unused,
int unused2, int unused3, int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t fwater_lo = I915_READ(FW_BLC) & ~0xfff;
int planea_wm;

i830_wm_info.fifo_size = dev_priv->display.get_fifo_size(dev, 0);

planea_wm = intel_calculate_wm(planea_clock, &i830_wm_info,
pixel_size, latency_ns);
fwater_lo |= (3<<8) | planea_wm;

DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);

I915_WRITE(FW_BLC, fwater_lo);
}

#define ILK_LP0_PLANE_LATENCY 700
#define ILK_LP0_CURSOR_LATENCY 1300

static bool ironlake_compute_wm0(struct drm_device *dev,
int pipe,
const struct intel_watermark_params *display,
int display_latency_ns,
const struct intel_watermark_params *cursor,
int cursor_latency_ns,
int *plane_wm,
int *cursor_wm)
{
struct drm_crtc *crtc;
int htotal, hdisplay, clock, pixel_size;
int line_time_us, line_count;
int entries, tlb_miss;

crtc = intel_get_crtc_for_pipe(dev, pipe);
if (crtc->fb == NULL || !crtc->enabled)
return false;

htotal = crtc->mode.htotal;
hdisplay = crtc->mode.hdisplay;
clock = crtc->mode.clock;
pixel_size = crtc->fb->bits_per_pixel / 8;

/* Use the small buffer method to calculate plane watermark */
entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
if (tlb_miss > 0)
entries += tlb_miss;
entries = DIV_ROUND_UP(entries, display->cacheline_size);
*plane_wm = entries + display->guard_size;
if (*plane_wm > (int)display->max_wm)
*plane_wm = display->max_wm;

/* Use the large buffer method to calculate cursor watermark */
line_time_us = ((htotal * 1000) / clock);
line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
entries = line_count * 64 * pixel_size;
tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
if (tlb_miss > 0)
entries += tlb_miss;
entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
*cursor_wm = entries + cursor->guard_size;
if (*cursor_wm > (int)cursor->max_wm)
*cursor_wm = (int)cursor->max_wm;

return true;
}

/*
* Check the wm result.
*
* If any calculated watermark values is larger than the maximum value that
* can be programmed into the associated watermark register, that watermark
* must be disabled.
*/
static bool ironlake_check_srwm(struct drm_device *dev, int level,
int fbc_wm, int display_wm, int cursor_wm,
const struct intel_watermark_params *display,
const struct intel_watermark_params *cursor)
{
struct drm_i915_private *dev_priv = dev->dev_private;

DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
" cursor %d\n", level, display_wm, fbc_wm, cursor_wm);

if (fbc_wm > SNB_FBC_MAX_SRWM) {
DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
fbc_wm, SNB_FBC_MAX_SRWM, level);

/* fbc has it's own way to disable FBC WM */
I915_WRITE(DISP_ARB_CTL,
I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS);
return false;
}

if (display_wm > display->max_wm) {
DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
display_wm, SNB_DISPLAY_MAX_SRWM, level);
return false;
}

if (cursor_wm > cursor->max_wm) {
DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
cursor_wm, SNB_CURSOR_MAX_SRWM, level);
return false;
}

if (!(fbc_wm || display_wm || cursor_wm)) {
DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level);
return false;
}

return true;
}

/*
* Compute watermark values of WM[1-3],
*/
static bool ironlake_compute_srwm(struct drm_device *dev, int level,
int hdisplay, int htotal,
int pixel_size, int clock, int latency_ns,
const struct intel_watermark_params *display,
const struct intel_watermark_params *cursor,
int *fbc_wm, int *display_wm, int *cursor_wm)
{

unsigned long line_time_us;
int line_count, line_size;
int small, large;
int entries;

if (!latency_ns) {
*fbc_wm = *display_wm = *cursor_wm = 0;
return false;
}

line_time_us = (htotal * 1000) / clock;
line_count = (latency_ns / line_time_us + 1000) / 1000;
line_size = hdisplay * pixel_size;

/* Use the minimum of the small and large buffer method for primary */
small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
large = line_count * line_size;

entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
*display_wm = entries + display->guard_size;

/*
* Spec says:
* FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
*/
*fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2;

/* calculate the self-refresh watermark for display cursor */
entries = line_count * pixel_size * 64;
entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
*cursor_wm = entries + cursor->guard_size;

return ironlake_check_srwm(dev, level,
*fbc_wm, *display_wm, *cursor_wm,
display, cursor);
}

static void ironlake_update_wm(struct drm_device *dev,
int planea_clock, int planeb_clock,
int hdisplay, int htotal,
int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int fbc_wm, plane_wm, cursor_wm, enabled;
int clock;

enabled = 0;
if (ironlake_compute_wm0(dev, 0,
&ironlake_display_wm_info,
ILK_LP0_PLANE_LATENCY,
&ironlake_cursor_wm_info,
ILK_LP0_CURSOR_LATENCY,
&plane_wm, &cursor_wm)) {
I915_WRITE(WM0_PIPEA_ILK,
(plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
" plane %d, " "cursor: %d\n",
plane_wm, cursor_wm);
enabled++;
}

if (ironlake_compute_wm0(dev, 1,
&ironlake_display_wm_info,
ILK_LP0_PLANE_LATENCY,
&ironlake_cursor_wm_info,
ILK_LP0_CURSOR_LATENCY,
&plane_wm, &cursor_wm)) {
I915_WRITE(WM0_PIPEB_ILK,
(plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
" plane %d, cursor: %d\n",
plane_wm, cursor_wm);
enabled++;
}

/*
* Calculate and update the self-refresh watermark only when one
* display plane is used.
*/
I915_WRITE(WM3_LP_ILK, 0);
I915_WRITE(WM2_LP_ILK, 0);
I915_WRITE(WM1_LP_ILK, 0);

if (enabled != 1)
return;

clock = planea_clock ? planea_clock : planeb_clock;

/* WM1 */
if (!ironlake_compute_srwm(dev, 1, hdisplay, htotal, pixel_size,
clock, ILK_READ_WM1_LATENCY() * 500,
&ironlake_display_srwm_info,
&ironlake_cursor_srwm_info,
&fbc_wm, &plane_wm, &cursor_wm))
return;

I915_WRITE(WM1_LP_ILK,
WM1_LP_SR_EN |
(ILK_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
(fbc_wm << WM1_LP_FBC_SHIFT) |
(plane_wm << WM1_LP_SR_SHIFT) |
cursor_wm);

/* WM2 */
if (!ironlake_compute_srwm(dev, 2, hdisplay, htotal, pixel_size,
clock, ILK_READ_WM2_LATENCY() * 500,
&ironlake_display_srwm_info,
&ironlake_cursor_srwm_info,
&fbc_wm, &plane_wm, &cursor_wm))
return;

I915_WRITE(WM2_LP_ILK,
WM2_LP_EN |
(ILK_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
(fbc_wm << WM1_LP_FBC_SHIFT) |
(plane_wm << WM1_LP_SR_SHIFT) |
cursor_wm);

/*
* WM3 is unsupported on ILK, probably because we don't have latency
* data for that power state
*/
}

static void sandybridge_update_wm(struct drm_device *dev,
int planea_clock, int planeb_clock,
int hdisplay, int htotal,
int pixel_size)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int latency = SNB_READ_WM0_LATENCY() * 100; /* In unit 0.1us */
int fbc_wm, plane_wm, cursor_wm, enabled;
int clock;

enabled = 0;
if (ironlake_compute_wm0(dev, 0,
&sandybridge_display_wm_info, latency,
&sandybridge_cursor_wm_info, latency,
&plane_wm, &cursor_wm)) {
I915_WRITE(WM0_PIPEA_ILK,
(plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
" plane %d, " "cursor: %d\n",
plane_wm, cursor_wm);
enabled++;
}

if (ironlake_compute_wm0(dev, 1,
&sandybridge_display_wm_info, latency,
&sandybridge_cursor_wm_info, latency,
&plane_wm, &cursor_wm)) {
I915_WRITE(WM0_PIPEB_ILK,
(plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
" plane %d, cursor: %d\n",
plane_wm, cursor_wm);
enabled++;
}

/*
* Calculate and update the self-refresh watermark only when one
* display plane is used.
*
* SNB support 3 levels of watermark.
*
* WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
* and disabled in the descending order
*
*/
I915_WRITE(WM3_LP_ILK, 0);
I915_WRITE(WM2_LP_ILK, 0);
I915_WRITE(WM1_LP_ILK, 0);

if (enabled != 1)
return;

clock = planea_clock ? planea_clock : planeb_clock;

/* WM1 */
if (!ironlake_compute_srwm(dev, 1, hdisplay, htotal, pixel_size,
clock, SNB_READ_WM1_LATENCY() * 500,
&sandybridge_display_srwm_info,
&sandybridge_cursor_srwm_info,
&fbc_wm, &plane_wm, &cursor_wm))
return;

I915_WRITE(WM1_LP_ILK,
WM1_LP_SR_EN |
(SNB_READ_WM1_LATENCY() << WM1_LP_LATENCY_SHIFT) |
(fbc_wm << WM1_LP_FBC_SHIFT) |
(plane_wm << WM1_LP_SR_SHIFT) |
cursor_wm);

/* WM2 */
if (!ironlake_compute_srwm(dev, 2,
hdisplay, htotal, pixel_size,
clock, SNB_READ_WM2_LATENCY() * 500,
&sandybridge_display_srwm_info,
&sandybridge_cursor_srwm_info,
&fbc_wm, &plane_wm, &cursor_wm))
return;

I915_WRITE(WM2_LP_ILK,
WM2_LP_EN |
(SNB_READ_WM2_LATENCY() << WM1_LP_LATENCY_SHIFT) |
(fbc_wm << WM1_LP_FBC_SHIFT) |
(plane_wm << WM1_LP_SR_SHIFT) |
cursor_wm);

/* WM3 */
if (!ironlake_compute_srwm(dev, 3,
hdisplay, htotal, pixel_size,
clock, SNB_READ_WM3_LATENCY() * 500,
&sandybridge_display_srwm_info,
&sandybridge_cursor_srwm_info,
&fbc_wm, &plane_wm, &cursor_wm))
return;

I915_WRITE(WM3_LP_ILK,
WM3_LP_EN |
(SNB_READ_WM3_LATENCY() << WM1_LP_LATENCY_SHIFT) |
(fbc_wm << WM1_LP_FBC_SHIFT) |
(plane_wm << WM1_LP_SR_SHIFT) |
cursor_wm);
}

/**
* intel_update_watermarks - update FIFO watermark values based on current modes
*
* Calculate watermark values for the various WM regs based on current mode
* and plane configuration.
*
* There are several cases to deal with here:
* - normal (i.e. non-self-refresh)
* - self-refresh (SR) mode
* - lines are large relative to FIFO size (buffer can hold up to 2)
* - lines are small relative to FIFO size (buffer can hold more than 2
* lines), so need to account for TLB latency
*
* The normal calculation is:
* watermark = dotclock * bytes per pixel * latency
* where latency is platform & configuration dependent (we assume pessimal
* values here).
*
* The SR calculation is:
* watermark = (trunc(latency/line time)+1) * surface width *
* bytes per pixel
* where
* line time = htotal / dotclock
* surface width = hdisplay for normal plane and 64 for cursor
* and latency is assumed to be high, as above.
*
* The final value programmed to the register should always be rounded up,
* and include an extra 2 entries to account for clock crossings.
*
* We don't use the sprite, so we can ignore that. And on Crestline we have
* to set the non-SR watermarks to 8.
*/
static void intel_update_watermarks(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
int sr_hdisplay = 0;
unsigned long planea_clock = 0, planeb_clock = 0, sr_clock = 0;
int enabled = 0, pixel_size = 0;
int sr_htotal = 0;

if (!dev_priv->display.update_wm)
return;

/* Get the clock config from both planes */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
if (intel_crtc->active) {
enabled++;
if (intel_crtc->plane == 0) {
DRM_DEBUG_KMS("plane A (pipe %d) clock: %d\n",
intel_crtc->pipe, crtc->mode.clock);
planea_clock = crtc->mode.clock;
} else {
DRM_DEBUG_KMS("plane B (pipe %d) clock: %d\n",
intel_crtc->pipe, crtc->mode.clock);
planeb_clock = crtc->mode.clock;
}
sr_hdisplay = crtc->mode.hdisplay;
sr_clock = crtc->mode.clock;
sr_htotal = crtc->mode.htotal;
if (crtc->fb)
pixel_size = crtc->fb->bits_per_pixel / 8;
else
pixel_size = 4; /* by default */
}
}

if (enabled <= 0)
return;

dev_priv->display.update_wm(dev, planea_clock, planeb_clock,
sr_hdisplay, sr_htotal, pixel_size);
}

static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
{
return dev_priv->lvds_use_ssc && i915_panel_use_ssc;
}

static int intel_crtc_mode_set(struct drm_crtc *crtc,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode,
int x, int y,
struct drm_framebuffer *old_fb)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int plane = intel_crtc->plane;
u32 fp_reg, dpll_reg;
int refclk, num_connectors = 0;
intel_clock_t clock, reduced_clock;
u32 dpll, fp = 0, fp2 = 0, dspcntr, pipeconf;
bool ok, has_reduced_clock = false, is_sdvo = false, is_dvo = false;
bool is_crt = false, is_lvds = false, is_tv = false, is_dp = false;
struct intel_encoder *has_edp_encoder = NULL;
struct drm_mode_config *mode_config = &dev->mode_config;
struct intel_encoder *encoder;
const intel_limit_t *limit;
int ret;
struct fdi_m_n m_n = {0};
u32 reg, temp;
int target_clock;

drm_vblank_pre_modeset(dev, pipe);

list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
if (encoder->base.crtc != crtc)
continue;

switch (encoder->type) {
case INTEL_OUTPUT_LVDS:
is_lvds = true;
break;
case INTEL_OUTPUT_SDVO:
case INTEL_OUTPUT_HDMI:
is_sdvo = true;
if (encoder->needs_tv_clock)
is_tv = true;
break;
case INTEL_OUTPUT_DVO:
is_dvo = true;
break;
case INTEL_OUTPUT_TVOUT:
is_tv = true;
break;
case INTEL_OUTPUT_ANALOG:
is_crt = true;
break;
case INTEL_OUTPUT_DISPLAYPORT:
is_dp = true;
break;
case INTEL_OUTPUT_EDP:
has_edp_encoder = encoder;
break;
}

num_connectors++;
}

if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2) {
refclk = dev_priv->lvds_ssc_freq * 1000;
DRM_DEBUG_KMS("using SSC reference clock of %d MHz\n",
refclk / 1000);
} else if (!IS_GEN2(dev)) {
refclk = 96000;
if (HAS_PCH_SPLIT(dev) &&
(!has_edp_encoder || intel_encoder_is_pch_edp(&has_edp_encoder->base)))
refclk = 120000; /* 120Mhz refclk */
} else {
refclk = 48000;
}

/*
* Returns a set of divisors for the desired target clock with the given
* refclk, or FALSE. The returned values represent the clock equation:
* reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
*/
limit = intel_limit(crtc, refclk);
ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk, &clock);
if (!ok) {
DRM_ERROR("Couldn't find PLL settings for mode!\n");
drm_vblank_post_modeset(dev, pipe);
return -EINVAL;
}

/* Ensure that the cursor is valid for the new mode before changing... */
intel_crtc_update_cursor(crtc, true);

if (is_lvds && dev_priv->lvds_downclock_avail) {
has_reduced_clock = limit->find_pll(limit, crtc,
dev_priv->lvds_downclock,
refclk,
&reduced_clock);
if (has_reduced_clock && (clock.p != reduced_clock.p)) {
/*
* If the different P is found, it means that we can't
* switch the display clock by using the FP0/FP1.
* In such case we will disable the LVDS downclock
* feature.
*/
DRM_DEBUG_KMS("Different P is found for "
"LVDS clock/downclock\n");
has_reduced_clock = 0;
}
}
/* SDVO TV has fixed PLL values depend on its clock range,
this mirrors vbios setting. */
if (is_sdvo && is_tv) {
if (adjusted_mode->clock >= 100000
&& adjusted_mode->clock < 140500) {
clock.p1 = 2;
clock.p2 = 10;
clock.n = 3;
clock.m1 = 16;
clock.m2 = 8;
} else if (adjusted_mode->clock >= 140500
&& adjusted_mode->clock <= 200000) {
clock.p1 = 1;
clock.p2 = 10;
clock.n = 6;
clock.m1 = 12;
clock.m2 = 8;
}
}

/* FDI link */
if (HAS_PCH_SPLIT(dev)) {
int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
int lane = 0, link_bw, bpp;
/* CPU eDP doesn't require FDI link, so just set DP M/N
according to current link config */
if (has_edp_encoder && !intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
target_clock = mode->clock;
intel_edp_link_config(has_edp_encoder,
&lane, &link_bw);
} else {
/* [e]DP over FDI requires target mode clock
instead of link clock */
if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base))
target_clock = mode->clock;
else
target_clock = adjusted_mode->clock;

/* FDI is a binary signal running at ~2.7GHz, encoding
* each output octet as 10 bits. The actual frequency
* is stored as a divider into a 100MHz clock, and the
* mode pixel clock is stored in units of 1KHz.
* Hence the bw of each lane in terms of the mode signal
* is:
*/
link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
}

/* determine panel color depth */
temp = I915_READ(PIPECONF(pipe));
temp &= ~PIPE_BPC_MASK;
if (is_lvds) {
/* the BPC will be 6 if it is 18-bit LVDS panel */
if ((I915_READ(PCH_LVDS) & LVDS_A3_POWER_MASK) == LVDS_A3_POWER_UP)
temp |= PIPE_8BPC;
else
temp |= PIPE_6BPC;
} else if (has_edp_encoder) {
switch (dev_priv->edp.bpp/3) {
case 8:
temp |= PIPE_8BPC;
break;
case 10:
temp |= PIPE_10BPC;
break;
case 6:
temp |= PIPE_6BPC;
break;
case 12:
temp |= PIPE_12BPC;
break;
}
} else
temp |= PIPE_8BPC;
I915_WRITE(PIPECONF(pipe), temp);

switch (temp & PIPE_BPC_MASK) {
case PIPE_8BPC:
bpp = 24;
break;
case PIPE_10BPC:
bpp = 30;
break;
case PIPE_6BPC:
bpp = 18;
break;
case PIPE_12BPC:
bpp = 36;
break;
default:
DRM_ERROR("unknown pipe bpc value\n");
bpp = 24;
}

if (!lane) {
/*
* Account for spread spectrum to avoid
* oversubscribing the link. Max center spread
* is 2.5%; use 5% for safety's sake.
*/
u32 bps = target_clock * bpp * 21 / 20;
lane = bps / (link_bw * 8) + 1;
}

intel_crtc->fdi_lanes = lane;

if (pixel_multiplier > 1)
link_bw *= pixel_multiplier;
ironlake_compute_m_n(bpp, lane, target_clock, link_bw, &m_n);
}

/* Ironlake: try to setup display ref clock before DPLL
* enabling. This is only under driver's control after
* PCH B stepping, previous chipset stepping should be
* ignoring this setting.
*/
if (HAS_PCH_SPLIT(dev)) {
temp = I915_READ(PCH_DREF_CONTROL);
/* Always enable nonspread source */
temp &= ~DREF_NONSPREAD_SOURCE_MASK;
temp |= DREF_NONSPREAD_SOURCE_ENABLE;
temp &= ~DREF_SSC_SOURCE_MASK;
temp |= DREF_SSC_SOURCE_ENABLE;
I915_WRITE(PCH_DREF_CONTROL, temp);

POSTING_READ(PCH_DREF_CONTROL);
udelay(200);

if (has_edp_encoder) {
if (intel_panel_use_ssc(dev_priv)) {
temp |= DREF_SSC1_ENABLE;
I915_WRITE(PCH_DREF_CONTROL, temp);

POSTING_READ(PCH_DREF_CONTROL);
udelay(200);
}
temp &= ~DREF_CPU_SOURCE_OUTPUT_MASK;

/* Enable CPU source on CPU attached eDP */
if (!intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
if (intel_panel_use_ssc(dev_priv))
temp |= DREF_CPU_SOURCE_OUTPUT_DOWNSPREAD;
else
temp |= DREF_CPU_SOURCE_OUTPUT_NONSPREAD;
} else {
/* Enable SSC on PCH eDP if needed */
if (intel_panel_use_ssc(dev_priv)) {
DRM_ERROR("enabling SSC on PCH\n");
temp |= DREF_SUPERSPREAD_SOURCE_ENABLE;
}
}
I915_WRITE(PCH_DREF_CONTROL, temp);
POSTING_READ(PCH_DREF_CONTROL);
udelay(200);
}
}

if (IS_PINEVIEW(dev)) {
fp = (1 << clock.n) << 16 | clock.m1 << 8 | clock.m2;
if (has_reduced_clock)
fp2 = (1 << reduced_clock.n) << 16 |
reduced_clock.m1 << 8 | reduced_clock.m2;
} else {
fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
if (has_reduced_clock)
fp2 = reduced_clock.n << 16 | reduced_clock.m1 << 8 |
reduced_clock.m2;
}

/* Enable autotuning of the PLL clock (if permissible) */
if (HAS_PCH_SPLIT(dev)) {
int factor = 21;

if (is_lvds) {
if ((intel_panel_use_ssc(dev_priv) &&
dev_priv->lvds_ssc_freq == 100) ||
(I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP)
factor = 25;
} else if (is_sdvo && is_tv)
factor = 20;

if (clock.m1 < factor * clock.n)
fp |= FP_CB_TUNE;
}

dpll = 0;
if (!HAS_PCH_SPLIT(dev))
dpll = DPLL_VGA_MODE_DIS;

if (!IS_GEN2(dev)) {
if (is_lvds)
dpll |= DPLLB_MODE_LVDS;
else
dpll |= DPLLB_MODE_DAC_SERIAL;
if (is_sdvo) {
int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
if (pixel_multiplier > 1) {
if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
dpll |= (pixel_multiplier - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
else if (HAS_PCH_SPLIT(dev))
dpll |= (pixel_multiplier - 1) << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
}
dpll |= DPLL_DVO_HIGH_SPEED;
}
if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base))
dpll |= DPLL_DVO_HIGH_SPEED;

/* compute bitmask from p1 value */
if (IS_PINEVIEW(dev))
dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
else {
dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
/* also FPA1 */
if (HAS_PCH_SPLIT(dev))
dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
if (IS_G4X(dev) && has_reduced_clock)
dpll |= (1 << (reduced_clock.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
}
switch (clock.p2) {
case 5:
dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
break;
case 7:
dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
break;
case 10:
dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
break;
case 14:
dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
break;
}
if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
} else {
if (is_lvds) {
dpll |= (1 << (clock.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
} else {
if (clock.p1 == 2)
dpll |= PLL_P1_DIVIDE_BY_TWO;
else
dpll |= (clock.p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
if (clock.p2 == 4)
dpll |= PLL_P2_DIVIDE_BY_4;
}
}

if (is_sdvo && is_tv)
dpll |= PLL_REF_INPUT_TVCLKINBC;
else if (is_tv)
/* XXX: just matching BIOS for now */
/* dpll |= PLL_REF_INPUT_TVCLKINBC; */
dpll |= 3;
else if (is_lvds && intel_panel_use_ssc(dev_priv) && num_connectors < 2)
dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
else
dpll |= PLL_REF_INPUT_DREFCLK;

/* setup pipeconf */
pipeconf = I915_READ(PIPECONF(pipe));

/* Set up the display plane register */
dspcntr = DISPPLANE_GAMMA_ENABLE;

/* Ironlake's plane is forced to pipe, bit 24 is to
enable color space conversion */
if (!HAS_PCH_SPLIT(dev)) {
if (pipe == 0)
dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;
else
dspcntr |= DISPPLANE_SEL_PIPE_B;
}

if (pipe == 0 && INTEL_INFO(dev)->gen < 4) {
/* Enable pixel doubling when the dot clock is > 90% of the (display)
* core speed.
*
* XXX: No double-wide on 915GM pipe B. Is that the only reason for the
* pipe == 0 check?
*/
if (mode->clock >
dev_priv->display.get_display_clock_speed(dev) * 9 / 10)
pipeconf |= PIPECONF_DOUBLE_WIDE;
else
pipeconf &= ~PIPECONF_DOUBLE_WIDE;
}

dspcntr |= DISPLAY_PLANE_ENABLE;
pipeconf |= PIPECONF_ENABLE;
dpll |= DPLL_VCO_ENABLE;

DRM_DEBUG_KMS("Mode for pipe %c:\n", pipe == 0 ? 'A' : 'B');
drm_mode_debug_printmodeline(mode);

/* assign to Ironlake registers */
if (HAS_PCH_SPLIT(dev)) {
fp_reg = PCH_FP0(pipe);
dpll_reg = PCH_DPLL(pipe);
} else {
fp_reg = FP0(pipe);
dpll_reg = DPLL(pipe);
}

/* PCH eDP needs FDI, but CPU eDP does not */
if (!has_edp_encoder || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
I915_WRITE(fp_reg, fp);
I915_WRITE(dpll_reg, dpll & ~DPLL_VCO_ENABLE);

POSTING_READ(dpll_reg);
udelay(150);
}

/* enable transcoder DPLL */
if (HAS_PCH_CPT(dev)) {
temp = I915_READ(PCH_DPLL_SEL);
if (pipe == 0)
temp |= TRANSA_DPLL_ENABLE | TRANSA_DPLLA_SEL;
else
temp |= TRANSB_DPLL_ENABLE | TRANSB_DPLLB_SEL;
I915_WRITE(PCH_DPLL_SEL, temp);

POSTING_READ(PCH_DPLL_SEL);
udelay(150);
}

/* The LVDS pin pair needs to be on before the DPLLs are enabled.
* This is an exception to the general rule that mode_set doesn't turn
* things on.
*/
if (is_lvds) {
reg = LVDS;
if (HAS_PCH_SPLIT(dev))
reg = PCH_LVDS;

temp = I915_READ(reg);
temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
if (pipe == 1) {
if (HAS_PCH_CPT(dev))
temp |= PORT_TRANS_B_SEL_CPT;
else
temp |= LVDS_PIPEB_SELECT;
} else {
if (HAS_PCH_CPT(dev))
temp &= ~PORT_TRANS_SEL_MASK;
else
temp &= ~LVDS_PIPEB_SELECT;
}
/* set the corresponsding LVDS_BORDER bit */
temp |= dev_priv->lvds_border_bits;
/* Set the B0-B3 data pairs corresponding to whether we're going to
* set the DPLLs for dual-channel mode or not.
*/
if (clock.p2 == 7)
temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
else
temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);

/* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
* appropriately here, but we need to look more thoroughly into how
* panels behave in the two modes.
*/
/* set the dithering flag on non-PCH LVDS as needed */
if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
if (dev_priv->lvds_dither)
temp |= LVDS_ENABLE_DITHER;
else
temp &= ~LVDS_ENABLE_DITHER;
}
I915_WRITE(reg, temp);
}

/* set the dithering flag and clear for anything other than a panel. */
if (HAS_PCH_SPLIT(dev)) {
pipeconf &= ~PIPECONF_DITHER_EN;
pipeconf &= ~PIPECONF_DITHER_TYPE_MASK;
if (dev_priv->lvds_dither && (is_lvds || has_edp_encoder)) {
pipeconf |= PIPECONF_DITHER_EN;
pipeconf |= PIPECONF_DITHER_TYPE_ST1;
}
}

if (is_dp || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
intel_dp_set_m_n(crtc, mode, adjusted_mode);
} else if (HAS_PCH_SPLIT(dev)) {
/* For non-DP output, clear any trans DP clock recovery setting.*/
if (pipe == 0) {
I915_WRITE(TRANSA_DATA_M1, 0);
I915_WRITE(TRANSA_DATA_N1, 0);
I915_WRITE(TRANSA_DP_LINK_M1, 0);
I915_WRITE(TRANSA_DP_LINK_N1, 0);
} else {
I915_WRITE(TRANSB_DATA_M1, 0);
I915_WRITE(TRANSB_DATA_N1, 0);
I915_WRITE(TRANSB_DP_LINK_M1, 0);
I915_WRITE(TRANSB_DP_LINK_N1, 0);
}
}

if (!has_edp_encoder || intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
I915_WRITE(dpll_reg, dpll);

/* Wait for the clocks to stabilize. */
POSTING_READ(dpll_reg);
udelay(150);

if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
temp = 0;
if (is_sdvo) {
temp = intel_mode_get_pixel_multiplier(adjusted_mode);
if (temp > 1)
temp = (temp - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
else
temp = 0;
}
I915_WRITE(DPLL_MD(pipe), temp);
} else {
/* The pixel multiplier can only be updated once the
* DPLL is enabled and the clocks are stable.
*
* So write it again.
*/
I915_WRITE(dpll_reg, dpll);
}
}

intel_crtc->lowfreq_avail = false;
if (is_lvds && has_reduced_clock && i915_powersave) {
I915_WRITE(fp_reg + 4, fp2);
intel_crtc->lowfreq_avail = true;
if (HAS_PIPE_CXSR(dev)) {
DRM_DEBUG_KMS("enabling CxSR downclocking\n");
pipeconf |= PIPECONF_CXSR_DOWNCLOCK;
}
} else {
I915_WRITE(fp_reg + 4, fp);
if (HAS_PIPE_CXSR(dev)) {
DRM_DEBUG_KMS("disabling CxSR downclocking\n");
pipeconf &= ~PIPECONF_CXSR_DOWNCLOCK;
}
}

if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
pipeconf |= PIPECONF_INTERLACE_W_FIELD_INDICATION;
/* the chip adds 2 halflines automatically */
adjusted_mode->crtc_vdisplay -= 1;
adjusted_mode->crtc_vtotal -= 1;
adjusted_mode->crtc_vblank_start -= 1;
adjusted_mode->crtc_vblank_end -= 1;
adjusted_mode->crtc_vsync_end -= 1;
adjusted_mode->crtc_vsync_start -= 1;
} else
pipeconf &= ~PIPECONF_INTERLACE_W_FIELD_INDICATION; /* progressive */

I915_WRITE(HTOTAL(pipe),
(adjusted_mode->crtc_hdisplay - 1) |
((adjusted_mode->crtc_htotal - 1) << 16));
I915_WRITE(HBLANK(pipe),
(adjusted_mode->crtc_hblank_start - 1) |
((adjusted_mode->crtc_hblank_end - 1) << 16));
I915_WRITE(HSYNC(pipe),
(adjusted_mode->crtc_hsync_start - 1) |
((adjusted_mode->crtc_hsync_end - 1) << 16));

I915_WRITE(VTOTAL(pipe),
(adjusted_mode->crtc_vdisplay - 1) |
((adjusted_mode->crtc_vtotal - 1) << 16));
I915_WRITE(VBLANK(pipe),
(adjusted_mode->crtc_vblank_start - 1) |
((adjusted_mode->crtc_vblank_end - 1) << 16));
I915_WRITE(VSYNC(pipe),
(adjusted_mode->crtc_vsync_start - 1) |
((adjusted_mode->crtc_vsync_end - 1) << 16));

/* pipesrc and dspsize control the size that is scaled from,
* which should always be the user's requested size.
*/
if (!HAS_PCH_SPLIT(dev)) {
I915_WRITE(DSPSIZE(plane),
((mode->vdisplay - 1) << 16) |
(mode->hdisplay - 1));
I915_WRITE(DSPPOS(plane), 0);
}
I915_WRITE(PIPESRC(pipe),
((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));

if (HAS_PCH_SPLIT(dev)) {
I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m);
I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n);
I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m);
I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n);

if (has_edp_encoder && !intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
ironlake_set_pll_edp(crtc, adjusted_mode->clock);
}
}

I915_WRITE(PIPECONF(pipe), pipeconf);
POSTING_READ(PIPECONF(pipe));

intel_wait_for_vblank(dev, pipe);

if (IS_GEN5(dev)) {
/* enable address swizzle for tiling buffer */
temp = I915_READ(DISP_ARB_CTL);
I915_WRITE(DISP_ARB_CTL, temp | DISP_TILE_SURFACE_SWIZZLING);
}

I915_WRITE(DSPCNTR(plane), dspcntr);

ret = intel_pipe_set_base(crtc, x, y, old_fb);

intel_update_watermarks(dev);

drm_vblank_post_modeset(dev, pipe);

return ret;
}

/** Loads the palette/gamma unit for the CRTC with the prepared values */
void intel_crtc_load_lut(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int palreg = (intel_crtc->pipe == 0) ? PALETTE_A : PALETTE_B;
int i;

/* The clocks have to be on to load the palette. */
if (!crtc->enabled)
return;

/* use legacy palette for Ironlake */
if (HAS_PCH_SPLIT(dev))
palreg = (intel_crtc->pipe == 0) ? LGC_PALETTE_A :
LGC_PALETTE_B;

for (i = 0; i < 256; i++) {
I915_WRITE(palreg + 4 * i,
(intel_crtc->lut_r[i] << 16) |
(intel_crtc->lut_g[i] << 8) |
intel_crtc->lut_b[i]);
}
}

static void i845_update_cursor(struct drm_crtc *crtc, u32 base)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
bool visible = base != 0;
u32 cntl;

if (intel_crtc->cursor_visible == visible)
return;

cntl = I915_READ(CURACNTR);
if (visible) {
/* On these chipsets we can only modify the base whilst
* the cursor is disabled.
*/
I915_WRITE(CURABASE, base);

cntl &= ~(CURSOR_FORMAT_MASK);
/* XXX width must be 64, stride 256 => 0x00 << 28 */
cntl |= CURSOR_ENABLE |
CURSOR_GAMMA_ENABLE |
CURSOR_FORMAT_ARGB;
} else
cntl &= ~(CURSOR_ENABLE | CURSOR_GAMMA_ENABLE);
I915_WRITE(CURACNTR, cntl);

intel_crtc->cursor_visible = visible;
}

static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
bool visible = base != 0;

if (intel_crtc->cursor_visible != visible) {
uint32_t cntl = I915_READ(pipe == 0 ? CURACNTR : CURBCNTR);
if (base) {
cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
cntl |= pipe << 28; /* Connect to correct pipe */
} else {
cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
cntl |= CURSOR_MODE_DISABLE;
}
I915_WRITE(pipe == 0 ? CURACNTR : CURBCNTR, cntl);

intel_crtc->cursor_visible = visible;
}
/* and commit changes on next vblank */
I915_WRITE(pipe == 0 ? CURABASE : CURBBASE, base);
}

/* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
static void intel_crtc_update_cursor(struct drm_crtc *crtc,
bool on)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int x = intel_crtc->cursor_x;
int y = intel_crtc->cursor_y;
u32 base, pos;
bool visible;

pos = 0;

if (on && crtc->enabled && crtc->fb) {
base = intel_crtc->cursor_addr;
if (x > (int) crtc->fb->width)
base = 0;

if (y > (int) crtc->fb->height)
base = 0;
} else
base = 0;

if (x < 0) {
if (x + intel_crtc->cursor_width < 0)
base = 0;

pos |= CURSOR_POS_SIGN << CURSOR_X_SHIFT;
x = -x;
}
pos |= x << CURSOR_X_SHIFT;

if (y < 0) {
if (y + intel_crtc->cursor_height < 0)
base = 0;

pos |= CURSOR_POS_SIGN << CURSOR_Y_SHIFT;
y = -y;
}
pos |= y << CURSOR_Y_SHIFT;

visible = base != 0;
if (!visible && !intel_crtc->cursor_visible)
return;

I915_WRITE(pipe == 0 ? CURAPOS : CURBPOS, pos);
if (IS_845G(dev) || IS_I865G(dev))
i845_update_cursor(crtc, base);
else
i9xx_update_cursor(crtc, base);

if (visible)
intel_mark_busy(dev, to_intel_framebuffer(crtc->fb)->obj);
}

static int intel_crtc_cursor_set(struct drm_crtc *crtc,
struct drm_file *file,
uint32_t handle,
uint32_t width, uint32_t height)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_i915_gem_object *obj;
uint32_t addr;
int ret;

DRM_DEBUG_KMS("\n");

/* if we want to turn off the cursor ignore width and height */
if (!handle) {
DRM_DEBUG_KMS("cursor off\n");
addr = 0;
obj = NULL;
mutex_lock(&dev->struct_mutex);
goto finish;
}

/* Currently we only support 64x64 cursors */
if (width != 64 || height != 64) {
DRM_ERROR("we currently only support 64x64 cursors\n");
return -EINVAL;
}

obj = to_intel_bo(drm_gem_object_lookup(dev, file, handle));
if (!obj)
return -ENOENT;

if (obj->base.size < width * height * 4) {
DRM_ERROR("buffer is to small\n");
ret = -ENOMEM;
goto fail;
}

/* we only need to pin inside GTT if cursor is non-phy */
mutex_lock(&dev->struct_mutex);
if (!dev_priv->info->cursor_needs_physical) {
if (obj->tiling_mode) {
DRM_ERROR("cursor cannot be tiled\n");
ret = -EINVAL;
goto fail_locked;
}

ret = i915_gem_object_pin(obj, PAGE_SIZE, true);
if (ret) {
DRM_ERROR("failed to pin cursor bo\n");
goto fail_locked;
}

ret = i915_gem_object_set_to_gtt_domain(obj, 0);
if (ret) {
DRM_ERROR("failed to move cursor bo into the GTT\n");
goto fail_unpin;
}

ret = i915_gem_object_put_fence(obj);
if (ret) {
DRM_ERROR("failed to move cursor bo into the GTT\n");
goto fail_unpin;
}

addr = obj->gtt_offset;
} else {
int align = IS_I830(dev) ? 16 * 1024 : 256;
ret = i915_gem_attach_phys_object(dev, obj,
(intel_crtc->pipe == 0) ? I915_GEM_PHYS_CURSOR_0 : I915_GEM_PHYS_CURSOR_1,
align);
if (ret) {
DRM_ERROR("failed to attach phys object\n");
goto fail_locked;
}
addr = obj->phys_obj->handle->busaddr;
}

if (IS_GEN2(dev))
I915_WRITE(CURSIZE, (height << 12) | width);

finish:
if (intel_crtc->cursor_bo) {
if (dev_priv->info->cursor_needs_physical) {
if (intel_crtc->cursor_bo != obj)
i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
} else
i915_gem_object_unpin(intel_crtc->cursor_bo);
drm_gem_object_unreference(&intel_crtc->cursor_bo->base);
}

mutex_unlock(&dev->struct_mutex);

intel_crtc->cursor_addr = addr;
intel_crtc->cursor_bo = obj;
intel_crtc->cursor_width = width;
intel_crtc->cursor_height = height;

intel_crtc_update_cursor(crtc, true);

return 0;
fail_unpin:
i915_gem_object_unpin(obj);
fail_locked:
mutex_unlock(&dev->struct_mutex);
fail:
drm_gem_object_unreference_unlocked(&obj->base);
return ret;
}

static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

intel_crtc->cursor_x = x;
intel_crtc->cursor_y = y;

intel_crtc_update_cursor(crtc, true);

return 0;
}

/** Sets the color ramps on behalf of RandR */
void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

intel_crtc->lut_r[regno] = red >> 8;
intel_crtc->lut_g[regno] = green >> 8;
intel_crtc->lut_b[regno] = blue >> 8;
}

void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

*red = intel_crtc->lut_r[regno] << 8;
*green = intel_crtc->lut_g[regno] << 8;
*blue = intel_crtc->lut_b[regno] << 8;
}

static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t start, uint32_t size)
{
int end = (start + size > 256) ? 256 : start + size, i;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

for (i = start; i < end; i++) {
intel_crtc->lut_r[i] = red[i] >> 8;
intel_crtc->lut_g[i] = green[i] >> 8;
intel_crtc->lut_b[i] = blue[i] >> 8;
}

intel_crtc_load_lut(crtc);
}

/**
* Get a pipe with a simple mode set on it for doing load-based monitor
* detection.
*
* It will be up to the load-detect code to adjust the pipe as appropriate for
* its requirements. The pipe will be connected to no other encoders.
*
* Currently this code will only succeed if there is a pipe with no encoders
* configured for it. In the future, it could choose to temporarily disable
* some outputs to free up a pipe for its use.
*
* \return crtc, or NULL if no pipes are available.
*/

/* VESA 640x480x72Hz mode to set on the pipe */
static struct drm_display_mode load_detect_mode = {
DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664,
704, 832, 0, 480, 489, 491, 520, 0, DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC),
};

struct drm_crtc *intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,
struct drm_connector *connector,
struct drm_display_mode *mode,
int *dpms_mode)
{
struct intel_crtc *intel_crtc;
struct drm_crtc *possible_crtc;
struct drm_crtc *supported_crtc =NULL;
struct drm_encoder *encoder = &intel_encoder->base;
struct drm_crtc *crtc = NULL;
struct drm_device *dev = encoder->dev;
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
struct drm_crtc_helper_funcs *crtc_funcs;
int i = -1;

/*
* Algorithm gets a little messy:
* - if the connector already has an assigned crtc, use it (but make
* sure it's on first)
* - try to find the first unused crtc that can drive this connector,
* and use that if we find one
* - if there are no unused crtcs available, try to use the first
* one we found that supports the connector
*/

/* See if we already have a CRTC for this connector */
if (encoder->crtc) {
crtc = encoder->crtc;
/* Make sure the crtc and connector are running */
intel_crtc = to_intel_crtc(crtc);
*dpms_mode = intel_crtc->dpms_mode;
if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
crtc_funcs = crtc->helper_private;
crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
}
return crtc;
}

/* Find an unused one (if possible) */
list_for_each_entry(possible_crtc, &dev->mode_config.crtc_list, head) {
i++;
if (!(encoder->possible_crtcs & (1 << i)))
continue;
if (!possible_crtc->enabled) {
crtc = possible_crtc;
break;
}
if (!supported_crtc)
supported_crtc = possible_crtc;
}

/*
* If we didn't find an unused CRTC, don't use any.
*/
if (!crtc) {
return NULL;
}

encoder->crtc = crtc;
connector->encoder = encoder;
intel_encoder->load_detect_temp = true;

intel_crtc = to_intel_crtc(crtc);
*dpms_mode = intel_crtc->dpms_mode;

if (!crtc->enabled) {
if (!mode)
mode = &load_detect_mode;
drm_crtc_helper_set_mode(crtc, mode, 0, 0, crtc->fb);
} else {
if (intel_crtc->dpms_mode != DRM_MODE_DPMS_ON) {
crtc_funcs = crtc->helper_private;
crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
}

/* Add this connector to the crtc */
encoder_funcs->mode_set(encoder, &crtc->mode, &crtc->mode);
encoder_funcs->commit(encoder);
}
/* let the connector get through one full cycle before testing */
intel_wait_for_vblank(dev, intel_crtc->pipe);

return crtc;
}

void intel_release_load_detect_pipe(struct intel_encoder *intel_encoder,
struct drm_connector *connector, int dpms_mode)
{
struct drm_encoder *encoder = &intel_encoder->base;
struct drm_device *dev = encoder->dev;
struct drm_crtc *crtc = encoder->crtc;
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;

if (intel_encoder->load_detect_temp) {
encoder->crtc = NULL;
connector->encoder = NULL;
intel_encoder->load_detect_temp = false;
crtc->enabled = drm_helper_crtc_in_use(crtc);
drm_helper_disable_unused_functions(dev);
}

/* Switch crtc and encoder back off if necessary */
if (crtc->enabled && dpms_mode != DRM_MODE_DPMS_ON) {
if (encoder->crtc == crtc)
encoder_funcs->dpms(encoder, dpms_mode);
crtc_funcs->dpms(crtc, dpms_mode);
}
}

/* Returns the clock of the currently programmed mode of the given pipe. */
static int intel_crtc_clock_get(struct drm_device *dev, struct drm_crtc *crtc)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
u32 dpll = I915_READ((pipe == 0) ? DPLL_A : DPLL_B);
u32 fp;
intel_clock_t clock;

if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
fp = I915_READ((pipe == 0) ? FPA0 : FPB0);
else
fp = I915_READ((pipe == 0) ? FPA1 : FPB1);

clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
if (IS_PINEVIEW(dev)) {
clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
} else {
clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
}

if (!IS_GEN2(dev)) {
if (IS_PINEVIEW(dev))
clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
else
clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
DPLL_FPA01_P1_POST_DIV_SHIFT);

switch (dpll & DPLL_MODE_MASK) {
case DPLLB_MODE_DAC_SERIAL:
clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
5 : 10;
break;
case DPLLB_MODE_LVDS:
clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
7 : 14;
break;
default:
DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
"mode\n", (int)(dpll & DPLL_MODE_MASK));
return 0;
}

/* XXX: Handle the 100Mhz refclk */
intel_clock(dev, 96000, &clock);
} else {
bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);

if (is_lvds) {
clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
DPLL_FPA01_P1_POST_DIV_SHIFT);
clock.p2 = 14;

if ((dpll & PLL_REF_INPUT_MASK) ==
PLLB_REF_INPUT_SPREADSPECTRUMIN) {
/* XXX: might not be 66MHz */
intel_clock(dev, 66000, &clock);
} else
intel_clock(dev, 48000, &clock);
} else {
if (dpll & PLL_P1_DIVIDE_BY_TWO)
clock.p1 = 2;
else {
clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
}
if (dpll & PLL_P2_DIVIDE_BY_4)
clock.p2 = 4;
else
clock.p2 = 2;

intel_clock(dev, 48000, &clock);
}
}

/* XXX: It would be nice to validate the clocks, but we can't reuse
* i830PllIsValid() because it relies on the xf86_config connector
* configuration being accurate, which it isn't necessarily.
*/

return clock.dot;
}

/** Returns the currently programmed mode of the given pipe. */
struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
struct drm_crtc *crtc)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
struct drm_display_mode *mode;
int htot = I915_READ((pipe == 0) ? HTOTAL_A : HTOTAL_B);
int hsync = I915_READ((pipe == 0) ? HSYNC_A : HSYNC_B);
int vtot = I915_READ((pipe == 0) ? VTOTAL_A : VTOTAL_B);
int vsync = I915_READ((pipe == 0) ? VSYNC_A : VSYNC_B);

mode = kzalloc(sizeof(*mode), GFP_KERNEL);
if (!mode)
return NULL;

mode->clock = intel_crtc_clock_get(dev, crtc);
mode->hdisplay = (htot & 0xffff) + 1;
mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
mode->hsync_start = (hsync & 0xffff) + 1;
mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
mode->vdisplay = (vtot & 0xffff) + 1;
mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
mode->vsync_start = (vsync & 0xffff) + 1;
mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;

drm_mode_set_name(mode);
drm_mode_set_crtcinfo(mode, 0);

return mode;
}

#define GPU_IDLE_TIMEOUT 500 /* ms */

/* When this timer fires, we've been idle for awhile */
static void intel_gpu_idle_timer(unsigned long arg)
{
struct drm_device *dev = (struct drm_device *)arg;
drm_i915_private_t *dev_priv = dev->dev_private;

if (!list_empty(&dev_priv->mm.active_list)) {
/* Still processing requests, so just re-arm the timer. */
mod_timer(&dev_priv->idle_timer, jiffies +
msecs_to_jiffies(GPU_IDLE_TIMEOUT));
return;
}

dev_priv->busy = false;
queue_work(dev_priv->wq, &dev_priv->idle_work);
}

#define CRTC_IDLE_TIMEOUT 1000 /* ms */

static void intel_crtc_idle_timer(unsigned long arg)
{
struct intel_crtc *intel_crtc = (struct intel_crtc *)arg;
struct drm_crtc *crtc = &intel_crtc->base;
drm_i915_private_t *dev_priv = crtc->dev->dev_private;
struct intel_framebuffer *intel_fb;

intel_fb = to_intel_framebuffer(crtc->fb);
if (intel_fb && intel_fb->obj->active) {
/* The framebuffer is still being accessed by the GPU. */
mod_timer(&intel_crtc->idle_timer, jiffies +
msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
return;
}

intel_crtc->busy = false;
queue_work(dev_priv->wq, &dev_priv->idle_work);
}

static void intel_increase_pllclock(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int dpll_reg = DPLL(pipe);
int dpll;

if (HAS_PCH_SPLIT(dev))
return;

if (!dev_priv->lvds_downclock_avail)
return;

dpll = I915_READ(dpll_reg);
if (!HAS_PIPE_CXSR(dev) && (dpll & DISPLAY_RATE_SELECT_FPA1)) {
DRM_DEBUG_DRIVER("upclocking LVDS\n");

/* Unlock panel regs */
I915_WRITE(PP_CONTROL,
I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);

dpll &= ~DISPLAY_RATE_SELECT_FPA1;
I915_WRITE(dpll_reg, dpll);
POSTING_READ(dpll_reg);
intel_wait_for_vblank(dev, pipe);

dpll = I915_READ(dpll_reg);
if (dpll & DISPLAY_RATE_SELECT_FPA1)
DRM_DEBUG_DRIVER("failed to upclock LVDS!\n");

/* ...and lock them again */
I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
}

/* Schedule downclock */
mod_timer(&intel_crtc->idle_timer, jiffies +
msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
}

static void intel_decrease_pllclock(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;
int dpll = I915_READ(dpll_reg);

if (HAS_PCH_SPLIT(dev))
return;

if (!dev_priv->lvds_downclock_avail)
return;

/*
* Since this is called by a timer, we should never get here in
* the manual case.
*/
if (!HAS_PIPE_CXSR(dev) && intel_crtc->lowfreq_avail) {
DRM_DEBUG_DRIVER("downclocking LVDS\n");

/* Unlock panel regs */
I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
PANEL_UNLOCK_REGS);

dpll |= DISPLAY_RATE_SELECT_FPA1;
I915_WRITE(dpll_reg, dpll);
dpll = I915_READ(dpll_reg);
intel_wait_for_vblank(dev, pipe);
dpll = I915_READ(dpll_reg);
if (!(dpll & DISPLAY_RATE_SELECT_FPA1))
DRM_DEBUG_DRIVER("failed to downclock LVDS!\n");

/* ...and lock them again */
I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & 0x3);
}

}

/**
* intel_idle_update - adjust clocks for idleness
* @work: work struct
*
* Either the GPU or display (or both) went idle. Check the busy status
* here and adjust the CRTC and GPU clocks as necessary.
*/
static void intel_idle_update(struct work_struct *work)
{
drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
idle_work);
struct drm_device *dev = dev_priv->dev;
struct drm_crtc *crtc;
struct intel_crtc *intel_crtc;
int enabled = 0;

if (!i915_powersave)
return;

mutex_lock(&dev->struct_mutex);

i915_update_gfx_val(dev_priv);

list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
/* Skip inactive CRTCs */
if (!crtc->fb)
continue;

enabled++;
intel_crtc = to_intel_crtc(crtc);
if (!intel_crtc->busy)
intel_decrease_pllclock(crtc);
}

if ((enabled == 1) && (IS_I945G(dev) || IS_I945GM(dev))) {
DRM_DEBUG_DRIVER("enable memory self refresh on 945\n");
I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
}

mutex_unlock(&dev->struct_mutex);
}

/**
* intel_mark_busy - mark the GPU and possibly the display busy
* @dev: drm device
* @obj: object we're operating on
*
* Callers can use this function to indicate that the GPU is busy processing
* commands. If @obj matches one of the CRTC objects (i.e. it's a scanout
* buffer), we'll also mark the display as busy, so we know to increase its
* clock frequency.
*/
void intel_mark_busy(struct drm_device *dev, struct drm_i915_gem_object *obj)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_crtc *crtc = NULL;
struct intel_framebuffer *intel_fb;
struct intel_crtc *intel_crtc;

if (!drm_core_check_feature(dev, DRIVER_MODESET))
return;

if (!dev_priv->busy) {
if (IS_I945G(dev) || IS_I945GM(dev)) {
u32 fw_blc_self;

DRM_DEBUG_DRIVER("disable memory self refresh on 945\n");
fw_blc_self = I915_READ(FW_BLC_SELF);
fw_blc_self &= ~FW_BLC_SELF_EN;
I915_WRITE(FW_BLC_SELF, fw_blc_self | FW_BLC_SELF_EN_MASK);
}
dev_priv->busy = true;
} else
mod_timer(&dev_priv->idle_timer, jiffies +
msecs_to_jiffies(GPU_IDLE_TIMEOUT));

list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (!crtc->fb)
continue;

intel_crtc = to_intel_crtc(crtc);
intel_fb = to_intel_framebuffer(crtc->fb);
if (intel_fb->obj == obj) {
if (!intel_crtc->busy) {
if (IS_I945G(dev) || IS_I945GM(dev)) {
u32 fw_blc_self;

DRM_DEBUG_DRIVER("disable memory self refresh on 945\n");
fw_blc_self = I915_READ(FW_BLC_SELF);
fw_blc_self &= ~FW_BLC_SELF_EN;
I915_WRITE(FW_BLC_SELF, fw_blc_self | FW_BLC_SELF_EN_MASK);
}
/* Non-busy -> busy, upclock */
intel_increase_pllclock(crtc);
intel_crtc->busy = true;
} else {
/* Busy -> busy, put off timer */
mod_timer(&intel_crtc->idle_timer, jiffies +
msecs_to_jiffies(CRTC_IDLE_TIMEOUT));
}
}
}
}

static void intel_crtc_destroy(struct drm_crtc *crtc)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct intel_unpin_work *work;
unsigned long flags;

spin_lock_irqsave(&dev->event_lock, flags);
work = intel_crtc->unpin_work;
intel_crtc->unpin_work = NULL;
spin_unlock_irqrestore(&dev->event_lock, flags);

if (work) {
cancel_work_sync(&work->work);
kfree(work);
}

drm_crtc_cleanup(crtc);

kfree(intel_crtc);
}

static void intel_unpin_work_fn(struct work_struct *__work)
{
struct intel_unpin_work *work =
container_of(__work, struct intel_unpin_work, work);

mutex_lock(&work->dev->struct_mutex);
i915_gem_object_unpin(work->old_fb_obj);
drm_gem_object_unreference(&work->pending_flip_obj->base);
drm_gem_object_unreference(&work->old_fb_obj->base);

mutex_unlock(&work->dev->struct_mutex);
kfree(work);
}

static void do_intel_finish_page_flip(struct drm_device *dev,
struct drm_crtc *crtc)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_unpin_work *work;
struct drm_i915_gem_object *obj;
struct drm_pending_vblank_event *e;
struct timeval tnow, tvbl;
unsigned long flags;

/* Ignore early vblank irqs */
if (intel_crtc == NULL)
return;

do_gettimeofday(&tnow);

spin_lock_irqsave(&dev->event_lock, flags);
work = intel_crtc->unpin_work;
if (work == NULL || !work->pending) {
spin_unlock_irqrestore(&dev->event_lock, flags);
return;
}

intel_crtc->unpin_work = NULL;

if (work->event) {
e = work->event;
e->event.sequence = drm_vblank_count_and_time(dev, intel_crtc->pipe, &tvbl);

/* Called before vblank count and timestamps have
* been updated for the vblank interval of flip
* completion? Need to increment vblank count and
* add one videorefresh duration to returned timestamp
* to account for this. We assume this happened if we
* get called over 0.9 frame durations after the last
* timestamped vblank.
*
* This calculation can not be used with vrefresh rates
* below 5Hz (10Hz to be on the safe side) without
* promoting to 64 integers.
*/
if (10 * (timeval_to_ns(&tnow) - timeval_to_ns(&tvbl)) >
9 * crtc->framedur_ns) {
e->event.sequence++;
tvbl = ns_to_timeval(timeval_to_ns(&tvbl) +
crtc->framedur_ns);
}

e->event.tv_sec = tvbl.tv_sec;
e->event.tv_usec = tvbl.tv_usec;

list_add_tail(&e->base.link,
&e->base.file_priv->event_list);
wake_up_interruptible(&e->base.file_priv->event_wait);
}

drm_vblank_put(dev, intel_crtc->pipe);

spin_unlock_irqrestore(&dev->event_lock, flags);

obj = work->old_fb_obj;

atomic_clear_mask(1 << intel_crtc->plane,
&obj->pending_flip.counter);
if (atomic_read(&obj->pending_flip) == 0)
wake_up(&dev_priv->pending_flip_queue);

schedule_work(&work->work);

trace_i915_flip_complete(intel_crtc->plane, work->pending_flip_obj);
}

void intel_finish_page_flip(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];

do_intel_finish_page_flip(dev, crtc);
}

void intel_finish_page_flip_plane(struct drm_device *dev, int plane)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane];

do_intel_finish_page_flip(dev, crtc);
}

void intel_prepare_page_flip(struct drm_device *dev, int plane)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc =
to_intel_crtc(dev_priv->plane_to_crtc_mapping[plane]);
unsigned long flags;

spin_lock_irqsave(&dev->event_lock, flags);
if (intel_crtc->unpin_work) {
if ((++intel_crtc->unpin_work->pending) > 1)
DRM_ERROR("Prepared flip multiple times\n");
} else {
DRM_DEBUG_DRIVER("preparing flip with no unpin work?\n");
}
spin_unlock_irqrestore(&dev->event_lock, flags);
}

static int intel_crtc_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_framebuffer *intel_fb;
struct drm_i915_gem_object *obj;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_unpin_work *work;
unsigned long flags, offset;
int pipe = intel_crtc->pipe;
u32 pf, pipesrc;
int ret;

work = kzalloc(sizeof *work, GFP_KERNEL);
if (work == NULL)
return -ENOMEM;

work->event = event;
work->dev = crtc->dev;
intel_fb = to_intel_framebuffer(crtc->fb);
work->old_fb_obj = intel_fb->obj;
INIT_WORK(&work->work, intel_unpin_work_fn);

/* We borrow the event spin lock for protecting unpin_work */
spin_lock_irqsave(&dev->event_lock, flags);
if (intel_crtc->unpin_work) {
spin_unlock_irqrestore(&dev->event_lock, flags);
kfree(work);

DRM_DEBUG_DRIVER("flip queue: crtc already busy\n");
return -EBUSY;
}
intel_crtc->unpin_work = work;
spin_unlock_irqrestore(&dev->event_lock, flags);

intel_fb = to_intel_framebuffer(fb);
obj = intel_fb->obj;

mutex_lock(&dev->struct_mutex);
ret = intel_pin_and_fence_fb_obj(dev, obj, LP_RING(dev_priv));
if (ret)
goto cleanup_work;

/* Reference the objects for the scheduled work. */
drm_gem_object_reference(&work->old_fb_obj->base);
drm_gem_object_reference(&obj->base);

crtc->fb = fb;

ret = drm_vblank_get(dev, intel_crtc->pipe);
if (ret)
goto cleanup_objs;

if (IS_GEN3(dev) || IS_GEN2(dev)) {
u32 flip_mask;

/* Can't queue multiple flips, so wait for the previous
* one to finish before executing the next.
*/
ret = BEGIN_LP_RING(2);
if (ret)
goto cleanup_objs;

if (intel_crtc->plane)
flip_mask = MI_WAIT_FOR_PLANE_B_FLIP;
else
flip_mask = MI_WAIT_FOR_PLANE_A_FLIP;
OUT_RING(MI_WAIT_FOR_EVENT | flip_mask);
OUT_RING(MI_NOOP);
ADVANCE_LP_RING();
}

work->pending_flip_obj = obj;

work->enable_stall_check = true;

/* Offset into the new buffer for cases of shared fbs between CRTCs */
offset = crtc->y * fb->pitch + crtc->x * fb->bits_per_pixel/8;

ret = BEGIN_LP_RING(4);
if (ret)
goto cleanup_objs;

/* Block clients from rendering to the new back buffer until
* the flip occurs and the object is no longer visible.
*/
atomic_add(1 << intel_crtc->plane, &work->old_fb_obj->pending_flip);

switch (INTEL_INFO(dev)->gen) {
case 2:
OUT_RING(MI_DISPLAY_FLIP |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch);
OUT_RING(obj->gtt_offset + offset);
OUT_RING(MI_NOOP);
break;

case 3:
OUT_RING(MI_DISPLAY_FLIP_I915 |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch);
OUT_RING(obj->gtt_offset + offset);
OUT_RING(MI_NOOP);
break;

case 4:
case 5:
/* i965+ uses the linear or tiled offsets from the
* Display Registers (which do not change across a page-flip)
* so we need only reprogram the base address.
*/
OUT_RING(MI_DISPLAY_FLIP |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch);
OUT_RING(obj->gtt_offset | obj->tiling_mode);

/* XXX Enabling the panel-fitter across page-flip is so far
* untested on non-native modes, so ignore it for now.
* pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
*/
pf = 0;
pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
OUT_RING(pf | pipesrc);
break;

case 6:
OUT_RING(MI_DISPLAY_FLIP |
MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
OUT_RING(fb->pitch | obj->tiling_mode);
OUT_RING(obj->gtt_offset);

pf = I915_READ(pipe == 0 ? PFA_CTL_1 : PFB_CTL_1) & PF_ENABLE;
pipesrc = I915_READ(pipe == 0 ? PIPEASRC : PIPEBSRC) & 0x0fff0fff;
OUT_RING(pf | pipesrc);
break;
}
ADVANCE_LP_RING();

mutex_unlock(&dev->struct_mutex);

trace_i915_flip_request(intel_crtc->plane, obj);

return 0;

cleanup_objs:
drm_gem_object_unreference(&work->old_fb_obj->base);
drm_gem_object_unreference(&obj->base);
cleanup_work:
mutex_unlock(&dev->struct_mutex);

spin_lock_irqsave(&dev->event_lock, flags);
intel_crtc->unpin_work = NULL;
spin_unlock_irqrestore(&dev->event_lock, flags);

kfree(work);

return ret;
}

static void intel_crtc_reset(struct drm_crtc *crtc)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

/* Reset flags back to the 'unknown' status so that they
* will be correctly set on the initial modeset.
*/
intel_crtc->cursor_addr = 0;
intel_crtc->dpms_mode = -1;

printk("intel_crtc %p\n", intel_crtc);

//intel_crtc->active = true; // force the pipe off on setup_init_config
}

static struct drm_crtc_helper_funcs intel_helper_funcs = {
.dpms = intel_crtc_dpms,
.mode_fixup = intel_crtc_mode_fixup,
.mode_set = intel_crtc_mode_set,
.mode_set_base = intel_pipe_set_base,
.mode_set_base_atomic = intel_pipe_set_base_atomic,
.load_lut = intel_crtc_load_lut,
.disable = intel_crtc_disable,
};

static const struct drm_crtc_funcs intel_crtc_funcs = {
.reset = intel_crtc_reset,
.cursor_set = intel_crtc_cursor_set,
.cursor_move = intel_crtc_cursor_move,
.gamma_set = intel_crtc_gamma_set,
.set_config = drm_crtc_helper_set_config,
.destroy = intel_crtc_destroy,
.page_flip = intel_crtc_page_flip,
};

static void intel_sanitize_modesetting(struct drm_device *dev,
int pipe, int plane)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg, val;

if (HAS_PCH_SPLIT(dev))
return;

/* Who knows what state these registers were left in by the BIOS or
* grub?
*
* If we leave the registers in a conflicting state (e.g. with the
* display plane reading from the other pipe than the one we intend
* to use) then when we attempt to teardown the active mode, we will
* not disable the pipes and planes in the correct order -- leaving
* a plane reading from a disabled pipe and possibly leading to
* undefined behaviour.
*/

reg = DSPCNTR(plane);
val = I915_READ(reg);

if ((val & DISPLAY_PLANE_ENABLE) == 0)
return;
if (!!(val & DISPPLANE_SEL_PIPE_MASK) == pipe)
return;

/* This display plane is active and attached to the other CPU pipe. */
pipe = !pipe;

/* Disable the plane and wait for it to stop reading from the pipe. */
I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
intel_flush_display_plane(dev, plane);

if (IS_GEN2(dev))
intel_wait_for_vblank(dev, pipe);

if (pipe == 0 && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
return;

/* Switch off the pipe. */
reg = PIPECONF(pipe);
val = I915_READ(reg);
if (val & PIPECONF_ENABLE) {
I915_WRITE(reg, val & ~PIPECONF_ENABLE);
intel_wait_for_pipe_off(dev, pipe);
}
}

static void intel_crtc_init(struct drm_device *dev, int pipe)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc;
int i;

intel_crtc = kzalloc(sizeof(struct intel_crtc) + (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)), GFP_KERNEL);
if (intel_crtc == NULL)
return;

drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);

drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
for (i = 0; i < 256; i++) {
intel_crtc->lut_r[i] = i;
intel_crtc->lut_g[i] = i;
intel_crtc->lut_b[i] = i;
}

/* Swap pipes & planes for FBC on pre-965 */
intel_crtc->pipe = pipe;
intel_crtc->plane = pipe;
if (IS_MOBILE(dev) && IS_GEN3(dev)) {
DRM_DEBUG_KMS("swapping pipes & planes for FBC\n");
intel_crtc->plane = !pipe;
}

BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
dev_priv->pipe_to_crtc_mapping[intel_crtc->pipe] = &intel_crtc->base;

//intel_crtc->cursor_addr = 0;
//intel_crtc->dpms_mode = -1;
intel_crtc->active = true; // force the pipe off on setup_init_config

printk("intel_crtc %p\n", intel_crtc);

intel_crtc_reset(&intel_crtc->base);

if (HAS_PCH_SPLIT(dev)) {
intel_helper_funcs.prepare = ironlake_crtc_prepare;
intel_helper_funcs.commit = ironlake_crtc_commit;
} else {
intel_helper_funcs.prepare = i9xx_crtc_prepare;
intel_helper_funcs.commit = i9xx_crtc_commit;
}

drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);

intel_crtc->busy = false;

setup_timer(&intel_crtc->idle_timer, intel_crtc_idle_timer,
(unsigned long)intel_crtc);

intel_sanitize_modesetting(dev, intel_crtc->pipe, intel_crtc->plane);
}

int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
struct drm_file *file)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct drm_i915_get_pipe_from_crtc_id *pipe_from_crtc_id = data;
struct drm_mode_object *drmmode_obj;
struct intel_crtc *crtc;

if (!dev_priv) {
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}

drmmode_obj = drm_mode_object_find(dev, pipe_from_crtc_id->crtc_id,
DRM_MODE_OBJECT_CRTC);

if (!drmmode_obj) {
DRM_ERROR("no such CRTC id\n");
return -EINVAL;
}

crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
pipe_from_crtc_id->pipe = crtc->pipe;

return 0;
}

static int intel_encoder_clones(struct drm_device *dev, int type_mask)
{
struct intel_encoder *encoder;
int index_mask = 0;
int entry = 0;

list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
if (type_mask & encoder->clone_mask)
index_mask |= (1 << entry);
entry++;
}

return index_mask;
}

static bool has_edp_a(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

if (!IS_MOBILE(dev))
return false;

if ((I915_READ(DP_A) & DP_DETECTED) == 0)
return false;

if (IS_GEN5(dev) &&
(I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
return false;

return true;
}

static void intel_setup_outputs(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_encoder *encoder;
bool dpd_is_edp = false;
bool has_lvds = false;

if (IS_MOBILE(dev) && !IS_I830(dev))
has_lvds = intel_lvds_init(dev);
if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
/* disable the panel fitter on everything but LVDS */
I915_WRITE(PFIT_CONTROL, 0);
}

if (HAS_PCH_SPLIT(dev)) {
dpd_is_edp = intel_dpd_is_edp(dev);

if (has_edp_a(dev))
intel_dp_init(dev, DP_A);

if (dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
intel_dp_init(dev, PCH_DP_D);
}

intel_crt_init(dev);

if (HAS_PCH_SPLIT(dev)) {
int found;

if (I915_READ(HDMIB) & PORT_DETECTED) {
/* PCH SDVOB multiplex with HDMIB */
found = intel_sdvo_init(dev, PCH_SDVOB);
if (!found)
intel_hdmi_init(dev, HDMIB);
if (!found && (I915_READ(PCH_DP_B) & DP_DETECTED))
intel_dp_init(dev, PCH_DP_B);
}

if (I915_READ(HDMIC) & PORT_DETECTED)
intel_hdmi_init(dev, HDMIC);

if (I915_READ(HDMID) & PORT_DETECTED)
intel_hdmi_init(dev, HDMID);

if (I915_READ(PCH_DP_C) & DP_DETECTED)
intel_dp_init(dev, PCH_DP_C);

if (!dpd_is_edp && (I915_READ(PCH_DP_D) & DP_DETECTED))
intel_dp_init(dev, PCH_DP_D);

} else if (SUPPORTS_DIGITAL_OUTPUTS(dev)) {
bool found = false;

if (I915_READ(SDVOB) & SDVO_DETECTED) {
DRM_DEBUG_KMS("probing SDVOB\n");
found = intel_sdvo_init(dev, SDVOB);
if (!found && SUPPORTS_INTEGRATED_HDMI(dev)) {
DRM_DEBUG_KMS("probing HDMI on SDVOB\n");
intel_hdmi_init(dev, SDVOB);
}

if (!found && SUPPORTS_INTEGRATED_DP(dev)) {
DRM_DEBUG_KMS("probing DP_B\n");
intel_dp_init(dev, DP_B);
}
}

/* Before G4X SDVOC doesn't have its own detect register */

if (I915_READ(SDVOB) & SDVO_DETECTED) {
DRM_DEBUG_KMS("probing SDVOC\n");
found = intel_sdvo_init(dev, SDVOC);
}

if (!found && (I915_READ(SDVOC) & SDVO_DETECTED)) {

if (SUPPORTS_INTEGRATED_HDMI(dev)) {
DRM_DEBUG_KMS("probing HDMI on SDVOC\n");
intel_hdmi_init(dev, SDVOC);
}
if (SUPPORTS_INTEGRATED_DP(dev)) {
DRM_DEBUG_KMS("probing DP_C\n");
intel_dp_init(dev, DP_C);
}
}

if (SUPPORTS_INTEGRATED_DP(dev) &&
(I915_READ(DP_D) & DP_DETECTED)) {
DRM_DEBUG_KMS("probing DP_D\n");
intel_dp_init(dev, DP_D);
}
} else if (IS_GEN2(dev))
intel_dvo_init(dev);

if (SUPPORTS_TV(dev))
intel_tv_init(dev);

list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head) {
encoder->base.possible_crtcs = encoder->crtc_mask;
encoder->base.possible_clones =
intel_encoder_clones(dev, encoder->clone_mask);
}

intel_panel_setup_backlight(dev);
}

static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
{
struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);

drm_framebuffer_cleanup(fb);
drm_gem_object_unreference_unlocked(&intel_fb->obj->base);

kfree(intel_fb);
}

static int intel_user_framebuffer_create_handle(struct drm_framebuffer *fb,
struct drm_file *file,
unsigned int *handle)
{
struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
struct drm_i915_gem_object *obj = intel_fb->obj;

return drm_gem_handle_create(file, &obj->base, handle);
}

static const struct drm_framebuffer_funcs intel_fb_funcs = {
.destroy = intel_user_framebuffer_destroy,
.create_handle = intel_user_framebuffer_create_handle,
};

int intel_framebuffer_init(struct drm_device *dev,
struct intel_framebuffer *intel_fb,
struct drm_mode_fb_cmd *mode_cmd,
struct drm_i915_gem_object *obj)
{
int ret;

if (obj->tiling_mode == I915_TILING_Y)
return -EINVAL;

if (mode_cmd->pitch & 63)
return -EINVAL;

switch (mode_cmd->bpp) {
case 8:
case 16:
case 24:
case 32:
break;
default:
return -EINVAL;
}

ret = drm_framebuffer_init(dev, &intel_fb->base, &intel_fb_funcs);
if (ret) {
DRM_ERROR("framebuffer init failed %d\n", ret);
return ret;
}

drm_helper_mode_fill_fb_struct(&intel_fb->base, mode_cmd);
intel_fb->obj = obj;
return 0;
}

static struct drm_framebuffer *
intel_user_framebuffer_create(struct drm_device *dev,
struct drm_file *filp,
struct drm_mode_fb_cmd *mode_cmd)
{
struct drm_i915_gem_object *obj;
struct intel_framebuffer *intel_fb;
int ret;

obj = to_intel_bo(drm_gem_object_lookup(dev, filp, mode_cmd->handle));
if (!obj)
return ERR_PTR(-ENOENT);

intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
if (!intel_fb)
return ERR_PTR(-ENOMEM);

ret = intel_framebuffer_init(dev, intel_fb, mode_cmd, obj);
if (ret) {
drm_gem_object_unreference_unlocked(&obj->base);
kfree(intel_fb);
return ERR_PTR(ret);
}

return &intel_fb->base;
}

static const struct drm_mode_config_funcs intel_mode_funcs = {
.fb_create = intel_user_framebuffer_create,
.output_poll_changed = intel_fb_output_poll_changed,
};

static struct drm_i915_gem_object *
intel_alloc_context_page(struct drm_device *dev)
{
struct drm_i915_gem_object *ctx;
int ret;

ctx = i915_gem_alloc_object(dev, 4096);
if (!ctx) {
DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
return NULL;
}

mutex_lock(&dev->struct_mutex);
ret = i915_gem_object_pin(ctx, 4096, true);
if (ret) {
DRM_ERROR("failed to pin power context: %d\n", ret);
goto err_unref;
}

ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
if (ret) {
DRM_ERROR("failed to set-domain on power context: %d\n", ret);
goto err_unpin;
}
mutex_unlock(&dev->struct_mutex);

return ctx;

err_unpin:
i915_gem_object_unpin(ctx);
err_unref:
drm_gem_object_unreference(&ctx->base);
mutex_unlock(&dev->struct_mutex);
return NULL;
}

bool ironlake_set_drps(struct drm_device *dev, u8 val)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u16 rgvswctl;

rgvswctl = I915_READ16(MEMSWCTL);
if (rgvswctl & MEMCTL_CMD_STS) {
DRM_DEBUG("gpu busy, RCS change rejected\n");
return false; /* still busy with another command */
}

rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
(val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
I915_WRITE16(MEMSWCTL, rgvswctl);
POSTING_READ16(MEMSWCTL);

rgvswctl |= MEMCTL_CMD_STS;
I915_WRITE16(MEMSWCTL, rgvswctl);

return true;
}

void ironlake_enable_drps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 rgvmodectl = I915_READ(MEMMODECTL);
u8 fmax, fmin, fstart, vstart;

/* Enable temp reporting */
I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);

/* 100ms RC evaluation intervals */
I915_WRITE(RCUPEI, 100000);
I915_WRITE(RCDNEI, 100000);

/* Set max/min thresholds to 90ms and 80ms respectively */
I915_WRITE(RCBMAXAVG, 90000);
I915_WRITE(RCBMINAVG, 80000);

I915_WRITE(MEMIHYST, 1);

/* Set up min, max, and cur for interrupt handling */
fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
MEMMODE_FSTART_SHIFT;

vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
PXVFREQ_PX_SHIFT;

dev_priv->fmax = fmax; /* IPS callback will increase this */
dev_priv->fstart = fstart;

dev_priv->max_delay = fstart;
dev_priv->min_delay = fmin;
dev_priv->cur_delay = fstart;

DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
fmax, fmin, fstart);

I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);

/*
* Interrupts will be enabled in ironlake_irq_postinstall
*/

I915_WRITE(VIDSTART, vstart);
POSTING_READ(VIDSTART);

rgvmodectl |= MEMMODE_SWMODE_EN;
I915_WRITE(MEMMODECTL, rgvmodectl);

if (wait_for((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
DRM_ERROR("stuck trying to change perf mode\n");
msleep(1);

ironlake_set_drps(dev, fstart);

dev_priv->last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
I915_READ(0x112e0);
dev_priv->last_time1 = jiffies_to_msecs(jiffies);
dev_priv->last_count2 = I915_READ(0x112f4);
getrawmonotonic(&dev_priv->last_time2);
}

void ironlake_disable_drps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u16 rgvswctl = I915_READ16(MEMSWCTL);

/* Ack interrupts, disable EFC interrupt */
I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
I915_WRITE(DEIIR, DE_PCU_EVENT);
I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);

/* Go back to the starting frequency */
ironlake_set_drps(dev, dev_priv->fstart);
msleep(1);
rgvswctl |= MEMCTL_CMD_STS;
I915_WRITE(MEMSWCTL, rgvswctl);
msleep(1);

}

void gen6_set_rps(struct drm_device *dev, u8 val)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 swreq;

swreq = (val & 0x3ff) << 25;
I915_WRITE(GEN6_RPNSWREQ, swreq);
}

void gen6_disable_rps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
I915_WRITE(GEN6_PMIER, 0);
I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
}

static unsigned long intel_pxfreq(u32 vidfreq)
{
unsigned long freq;
int div = (vidfreq & 0x3f0000) >> 16;
int post = (vidfreq & 0x3000) >> 12;
int pre = (vidfreq & 0x7);

if (!pre)
return 0;

freq = ((div * 133333) / ((1<<post) * pre));

return freq;
}

void intel_init_emon(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 lcfuse;
u8 pxw[16];
int i;

/* Disable to program */
I915_WRITE(ECR, 0);
POSTING_READ(ECR);

/* Program energy weights for various events */
I915_WRITE(SDEW, 0x15040d00);
I915_WRITE(CSIEW0, 0x007f0000);
I915_WRITE(CSIEW1, 0x1e220004);
I915_WRITE(CSIEW2, 0x04000004);

for (i = 0; i < 5; i++)
I915_WRITE(PEW + (i * 4), 0);
for (i = 0; i < 3; i++)
I915_WRITE(DEW + (i * 4), 0);

/* Program P-state weights to account for frequency power adjustment */
for (i = 0; i < 16; i++) {
u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
unsigned long freq = intel_pxfreq(pxvidfreq);
unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
PXVFREQ_PX_SHIFT;
unsigned long val;

val = vid * vid;
val *= (freq / 1000);
val *= 255;
val /= (127*127*900);
if (val > 0xff)
DRM_ERROR("bad pxval: %ld\n", val);
pxw[i] = val;
}
/* Render standby states get 0 weight */
pxw[14] = 0;
pxw[15] = 0;

for (i = 0; i < 4; i++) {
u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
(pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
I915_WRITE(PXW + (i * 4), val);
}

/* Adjust magic regs to magic values (more experimental results) */
I915_WRITE(OGW0, 0);
I915_WRITE(OGW1, 0);
I915_WRITE(EG0, 0x00007f00);
I915_WRITE(EG1, 0x0000000e);
I915_WRITE(EG2, 0x000e0000);
I915_WRITE(EG3, 0x68000300);
I915_WRITE(EG4, 0x42000000);
I915_WRITE(EG5, 0x00140031);
I915_WRITE(EG6, 0);
I915_WRITE(EG7, 0);

for (i = 0; i < 8; i++)
I915_WRITE(PXWL + (i * 4), 0);

/* Enable PMON + select events */
I915_WRITE(ECR, 0x80000019);

lcfuse = I915_READ(LCFUSE02);

dev_priv->corr = (lcfuse & LCFUSE_HIV_MASK);
}

void gen6_enable_rps(struct drm_i915_private *dev_priv)
{
u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
u32 pcu_mbox;
int cur_freq, min_freq, max_freq;
int i;

/* Here begins a magic sequence of register writes to enable
* auto-downclocking.
*
* Perhaps there might be some value in exposing these to
* userspace...
*/
I915_WRITE(GEN6_RC_STATE, 0);
__gen6_force_wake_get(dev_priv);

/* disable the counters and set deterministic thresholds */
I915_WRITE(GEN6_RC_CONTROL, 0);

I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);

for (i = 0; i < I915_NUM_RINGS; i++)
I915_WRITE(RING_MAX_IDLE(dev_priv->ring[i].mmio_base), 10);

I915_WRITE(GEN6_RC_SLEEP, 0);
I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
I915_WRITE(GEN6_RC6p_THRESHOLD, 100000);
I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */

I915_WRITE(GEN6_RC_CONTROL,
GEN6_RC_CTL_RC6p_ENABLE |
GEN6_RC_CTL_RC6_ENABLE |
GEN6_RC_CTL_EI_MODE(1) |
GEN6_RC_CTL_HW_ENABLE);

I915_WRITE(GEN6_RPNSWREQ,
GEN6_FREQUENCY(10) |
GEN6_OFFSET(0) |
GEN6_AGGRESSIVE_TURBO);
I915_WRITE(GEN6_RC_VIDEO_FREQ,
GEN6_FREQUENCY(12));

I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
18 << 24 |
6 << 16);
I915_WRITE(GEN6_RP_UP_THRESHOLD, 90000);
I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 100000);
I915_WRITE(GEN6_RP_UP_EI, 100000);
I915_WRITE(GEN6_RP_DOWN_EI, 300000);
I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
I915_WRITE(GEN6_RP_CONTROL,
GEN6_RP_MEDIA_TURBO |
GEN6_RP_USE_NORMAL_FREQ |
GEN6_RP_MEDIA_IS_GFX |
GEN6_RP_ENABLE |
GEN6_RP_UP_BUSY_MAX |
GEN6_RP_DOWN_BUSY_MIN);

if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
500))
DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");

I915_WRITE(GEN6_PCODE_DATA, 0);
I915_WRITE(GEN6_PCODE_MAILBOX,
GEN6_PCODE_READY |
GEN6_PCODE_WRITE_MIN_FREQ_TABLE);
if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
500))
DRM_ERROR("timeout waiting for pcode mailbox to finish\n");

min_freq = (rp_state_cap & 0xff0000) >> 16;
max_freq = rp_state_cap & 0xff;
cur_freq = (gt_perf_status & 0xff00) >> 8;

/* Check for overclock support */
if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
500))
DRM_ERROR("timeout waiting for pcode mailbox to become idle\n");
I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_READ_OC_PARAMS);
pcu_mbox = I915_READ(GEN6_PCODE_DATA);
if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
500))
DRM_ERROR("timeout waiting for pcode mailbox to finish\n");
if (pcu_mbox & (1<<31)) { /* OC supported */
max_freq = pcu_mbox & 0xff;
DRM_DEBUG_DRIVER("overclocking supported, adjusting frequency max to %dMHz\n", pcu_mbox * 100);
}

/* In units of 100MHz */
dev_priv->max_delay = max_freq;
dev_priv->min_delay = min_freq;
dev_priv->cur_delay = cur_freq;

/* requires MSI enabled */
I915_WRITE(GEN6_PMIER,
GEN6_PM_MBOX_EVENT |
GEN6_PM_THERMAL_EVENT |
GEN6_PM_RP_DOWN_TIMEOUT |
GEN6_PM_RP_UP_THRESHOLD |
GEN6_PM_RP_DOWN_THRESHOLD |
GEN6_PM_RP_UP_EI_EXPIRED |
GEN6_PM_RP_DOWN_EI_EXPIRED);
I915_WRITE(GEN6_PMIMR, 0);
/* enable all PM interrupts */
I915_WRITE(GEN6_PMINTRMSK, 0);

__gen6_force_wake_put(dev_priv);
}

void intel_enable_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

/*
* Disable clock gating reported to work incorrectly according to the
* specs, but enable as much else as we can.
*/
if (HAS_PCH_SPLIT(dev)) {
uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE;

if (IS_GEN5(dev)) {
/* Required for FBC */
dspclk_gate |= DPFCUNIT_CLOCK_GATE_DISABLE |
DPFCRUNIT_CLOCK_GATE_DISABLE |
DPFDUNIT_CLOCK_GATE_DISABLE;
/* Required for CxSR */
dspclk_gate |= DPARBUNIT_CLOCK_GATE_DISABLE;

I915_WRITE(PCH_3DCGDIS0,
MARIUNIT_CLOCK_GATE_DISABLE |
SVSMUNIT_CLOCK_GATE_DISABLE);
I915_WRITE(PCH_3DCGDIS1,
VFMUNIT_CLOCK_GATE_DISABLE);
}

I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate);

/*
* On Ibex Peak and Cougar Point, we need to disable clock
* gating for the panel power sequencer or it will fail to
* start up when no ports are active.
*/
I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);

/*
* According to the spec the following bits should be set in
* order to enable memory self-refresh
* The bit 22/21 of 0x42004
* The bit 5 of 0x42020
* The bit 15 of 0x45000
*/
if (IS_GEN5(dev)) {
I915_WRITE(ILK_DISPLAY_CHICKEN2,
(I915_READ(ILK_DISPLAY_CHICKEN2) |
ILK_DPARB_GATE | ILK_VSDPFD_FULL));
I915_WRITE(ILK_DSPCLK_GATE,
(I915_READ(ILK_DSPCLK_GATE) |
ILK_DPARB_CLK_GATE));
I915_WRITE(DISP_ARB_CTL,
(I915_READ(DISP_ARB_CTL) |
DISP_FBC_WM_DIS));
I915_WRITE(WM3_LP_ILK, 0);
I915_WRITE(WM2_LP_ILK, 0);
I915_WRITE(WM1_LP_ILK, 0);
}
/*
* Based on the document from hardware guys the following bits
* should be set unconditionally in order to enable FBC.
* The bit 22 of 0x42000
* The bit 22 of 0x42004
* The bit 7,8,9 of 0x42020.
*/
if (IS_IRONLAKE_M(dev)) {
I915_WRITE(ILK_DISPLAY_CHICKEN1,
I915_READ(ILK_DISPLAY_CHICKEN1) |
ILK_FBCQ_DIS);
I915_WRITE(ILK_DISPLAY_CHICKEN2,
I915_READ(ILK_DISPLAY_CHICKEN2) |
ILK_DPARB_GATE);
I915_WRITE(ILK_DSPCLK_GATE,
I915_READ(ILK_DSPCLK_GATE) |
ILK_DPFC_DIS1 |
ILK_DPFC_DIS2 |
ILK_CLK_FBC);
}

I915_WRITE(ILK_DISPLAY_CHICKEN2,
I915_READ(ILK_DISPLAY_CHICKEN2) |
ILK_ELPIN_409_SELECT);

if (IS_GEN5(dev)) {
I915_WRITE(_3D_CHICKEN2,
_3D_CHICKEN2_WM_READ_PIPELINED << 16 |
_3D_CHICKEN2_WM_READ_PIPELINED);
}

if (IS_GEN6(dev)) {
I915_WRITE(WM3_LP_ILK, 0);
I915_WRITE(WM2_LP_ILK, 0);
I915_WRITE(WM1_LP_ILK, 0);

/*
* According to the spec the following bits should be
* set in order to enable memory self-refresh and fbc:
* The bit21 and bit22 of 0x42000
* The bit21 and bit22 of 0x42004
* The bit5 and bit7 of 0x42020
* The bit14 of 0x70180
* The bit14 of 0x71180
*/
I915_WRITE(ILK_DISPLAY_CHICKEN1,
I915_READ(ILK_DISPLAY_CHICKEN1) |
ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
I915_WRITE(ILK_DISPLAY_CHICKEN2,
I915_READ(ILK_DISPLAY_CHICKEN2) |
ILK_DPARB_GATE | ILK_VSDPFD_FULL);
I915_WRITE(ILK_DSPCLK_GATE,
I915_READ(ILK_DSPCLK_GATE) |
ILK_DPARB_CLK_GATE |
ILK_DPFD_CLK_GATE);

I915_WRITE(DSPACNTR,
I915_READ(DSPACNTR) |
DISPPLANE_TRICKLE_FEED_DISABLE);
I915_WRITE(DSPBCNTR,
I915_READ(DSPBCNTR) |
DISPPLANE_TRICKLE_FEED_DISABLE);
}
} else if (IS_G4X(dev)) {
uint32_t dspclk_gate;
I915_WRITE(RENCLK_GATE_D1, 0);
I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
GS_UNIT_CLOCK_GATE_DISABLE |
CL_UNIT_CLOCK_GATE_DISABLE);
I915_WRITE(RAMCLK_GATE_D, 0);
dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
OVRUNIT_CLOCK_GATE_DISABLE |
OVCUNIT_CLOCK_GATE_DISABLE;
if (IS_GM45(dev))
dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
} else if (IS_CRESTLINE(dev)) {
I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
I915_WRITE(RENCLK_GATE_D2, 0);
I915_WRITE(DSPCLK_GATE_D, 0);
I915_WRITE(RAMCLK_GATE_D, 0);
I915_WRITE16(DEUC, 0);
} else if (IS_BROADWATER(dev)) {
I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
I965_RCC_CLOCK_GATE_DISABLE |
I965_RCPB_CLOCK_GATE_DISABLE |
I965_ISC_CLOCK_GATE_DISABLE |
I965_FBC_CLOCK_GATE_DISABLE);
I915_WRITE(RENCLK_GATE_D2, 0);
} else if (IS_GEN3(dev)) {
u32 dstate = I915_READ(D_STATE);

dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
DSTATE_DOT_CLOCK_GATING;
I915_WRITE(D_STATE, dstate);
} else if (IS_I85X(dev) || IS_I865G(dev)) {
I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
} else if (IS_I830(dev)) {
I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
}
}

void intel_disable_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

if (dev_priv->renderctx) {
struct drm_i915_gem_object *obj = dev_priv->renderctx;

I915_WRITE(CCID, 0);
POSTING_READ(CCID);

i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
dev_priv->renderctx = NULL;
}

if (dev_priv->pwrctx) {
struct drm_i915_gem_object *obj = dev_priv->pwrctx;

I915_WRITE(PWRCTXA, 0);
POSTING_READ(PWRCTXA);

i915_gem_object_unpin(obj);
drm_gem_object_unreference(&obj->base);
dev_priv->pwrctx = NULL;
}
}

static void ironlake_disable_rc6(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

/* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
10);
POSTING_READ(CCID);
I915_WRITE(PWRCTXA, 0);
POSTING_READ(PWRCTXA);
I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
POSTING_READ(RSTDBYCTL);
i915_gem_object_unpin(dev_priv->renderctx);
drm_gem_object_unreference(&dev_priv->renderctx->base);
dev_priv->renderctx = NULL;
i915_gem_object_unpin(dev_priv->pwrctx);
drm_gem_object_unreference(&dev_priv->pwrctx->base);
dev_priv->pwrctx = NULL;
}

void ironlake_enable_rc6(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;

/*
* GPU can automatically power down the render unit if given a page
* to save state.
*/
ret = BEGIN_LP_RING(6);
if (ret) {
ironlake_disable_rc6(dev);
return;
}
OUT_RING(MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
OUT_RING(MI_SET_CONTEXT);
OUT_RING(dev_priv->renderctx->gtt_offset |
MI_MM_SPACE_GTT |
MI_SAVE_EXT_STATE_EN |
MI_RESTORE_EXT_STATE_EN |
MI_RESTORE_INHIBIT);
OUT_RING(MI_SUSPEND_FLUSH);
OUT_RING(MI_NOOP);
OUT_RING(MI_FLUSH);
ADVANCE_LP_RING();

I915_WRITE(PWRCTXA, dev_priv->pwrctx->gtt_offset | PWRCTX_EN);
I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
}

/* Set up chip specific display functions */
static void intel_init_display(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

/* We always want a DPMS function */
if (HAS_PCH_SPLIT(dev))
dev_priv->display.dpms = ironlake_crtc_dpms;
else
dev_priv->display.dpms = i9xx_crtc_dpms;

if (I915_HAS_FBC(dev)) {
if (HAS_PCH_SPLIT(dev)) {
dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
dev_priv->display.enable_fbc = ironlake_enable_fbc;
dev_priv->display.disable_fbc = ironlake_disable_fbc;
} else if (IS_GM45(dev)) {
dev_priv->display.fbc_enabled = g4x_fbc_enabled;
dev_priv->display.enable_fbc = g4x_enable_fbc;
dev_priv->display.disable_fbc = g4x_disable_fbc;
} else if (IS_CRESTLINE(dev)) {
dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
dev_priv->display.enable_fbc = i8xx_enable_fbc;
dev_priv->display.disable_fbc = i8xx_disable_fbc;
}
/* 855GM needs testing */
}

/* Returns the core display clock speed */
if (IS_I945G(dev) || (IS_G33(dev) && ! IS_PINEVIEW_M(dev)))
dev_priv->display.get_display_clock_speed =
i945_get_display_clock_speed;
else if (IS_I915G(dev))
dev_priv->display.get_display_clock_speed =
i915_get_display_clock_speed;
else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev))
dev_priv->display.get_display_clock_speed =
i9xx_misc_get_display_clock_speed;
else if (IS_I915GM(dev))
dev_priv->display.get_display_clock_speed =
i915gm_get_display_clock_speed;
else if (IS_I865G(dev))
dev_priv->display.get_display_clock_speed =
i865_get_display_clock_speed;
else if (IS_I85X(dev))
dev_priv->display.get_display_clock_speed =
i855_get_display_clock_speed;
else /* 852, 830 */
dev_priv->display.get_display_clock_speed =
i830_get_display_clock_speed;

/* For FIFO watermark updates */
if (HAS_PCH_SPLIT(dev)) {
if (IS_GEN5(dev)) {
if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK)
dev_priv->display.update_wm = ironlake_update_wm;
else {
DRM_DEBUG_KMS("Failed to get proper latency. "
"Disable CxSR\n");
dev_priv->display.update_wm = NULL;
}
} else if (IS_GEN6(dev)) {
if (SNB_READ_WM0_LATENCY()) {
dev_priv->display.update_wm = sandybridge_update_wm;
} else {
DRM_DEBUG_KMS("Failed to read display plane latency. "
"Disable CxSR\n");
dev_priv->display.update_wm = NULL;
}
} else
dev_priv->display.update_wm = NULL;
} else if (IS_PINEVIEW(dev)) {
if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
dev_priv->is_ddr3,
dev_priv->fsb_freq,
dev_priv->mem_freq)) {
DRM_INFO("failed to find known CxSR latency "
"(found ddr%s fsb freq %d, mem freq %d), "
"disabling CxSR\n",
(dev_priv->is_ddr3 == 1) ? "3": "2",
dev_priv->fsb_freq, dev_priv->mem_freq);
/* Disable CxSR and never update its watermark again */
pineview_disable_cxsr(dev);
dev_priv->display.update_wm = NULL;
} else
dev_priv->display.update_wm = pineview_update_wm;
} else if (IS_G4X(dev))
dev_priv->display.update_wm = g4x_update_wm;
else if (IS_GEN4(dev))
dev_priv->display.update_wm = i965_update_wm;
else if (IS_GEN3(dev)) {
dev_priv->display.update_wm = i9xx_update_wm;
dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
} else if (IS_I85X(dev)) {
dev_priv->display.update_wm = i9xx_update_wm;
dev_priv->display.get_fifo_size = i85x_get_fifo_size;
} else {
dev_priv->display.update_wm = i830_update_wm;
if (IS_845G(dev))
dev_priv->display.get_fifo_size = i845_get_fifo_size;
else
dev_priv->display.get_fifo_size = i830_get_fifo_size;
}
}

/*
* Some BIOSes insist on assuming the GPU's pipe A is enabled at suspend,
* resume, or other times. This quirk makes sure that's the case for
* affected systems.
*/
static void quirk_pipea_force (struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;

dev_priv->quirks |= QUIRK_PIPEA_FORCE;
DRM_DEBUG_DRIVER("applying pipe a force quirk\n");
}

struct intel_quirk {
int device;
int subsystem_vendor;
int subsystem_device;
void (*hook)(struct drm_device *dev);
};

struct intel_quirk intel_quirks[] = {
/* HP Compaq 2730p needs pipe A force quirk (LP: #291555) */
{ 0x2a42, 0x103c, 0x30eb, quirk_pipea_force },
/* HP Mini needs pipe A force quirk (LP: #322104) */
{ 0x27ae,0x103c, 0x361a, quirk_pipea_force },

/* Thinkpad R31 needs pipe A force quirk */
{ 0x3577, 0x1014, 0x0505, quirk_pipea_force },
/* Toshiba Protege R-205, S-209 needs pipe A force quirk */
{ 0x2592, 0x1179, 0x0001, quirk_pipea_force },

/* ThinkPad X30 needs pipe A force quirk (LP: #304614) */
{ 0x3577, 0x1014, 0x0513, quirk_pipea_force },
/* ThinkPad X40 needs pipe A force quirk */

/* ThinkPad T60 needs pipe A force quirk (bug #16494) */
{ 0x2782, 0x17aa, 0x201a, quirk_pipea_force },

/* 855 & before need to leave pipe A & dpll A up */
{ 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
{ 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
};

static void intel_init_quirks(struct drm_device *dev)
{
struct pci_dev *d = dev->pdev;
int i;

for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
struct intel_quirk *q = &intel_quirks[i];

if (d->device == q->device &&
(d->subsystem_vendor == q->subsystem_vendor ||
q->subsystem_vendor == PCI_ANY_ID) &&
(d->subsystem_device == q->subsystem_device ||
q->subsystem_device == PCI_ANY_ID))
q->hook(dev);
}
}

/* Disable the VGA plane that we never use */
static void i915_disable_vga(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u8 sr1;
u32 vga_reg;

if (HAS_PCH_SPLIT(dev))
vga_reg = CPU_VGACNTRL;
else
vga_reg = VGACNTRL;

vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
outb(1, VGA_SR_INDEX);
sr1 = inb(VGA_SR_DATA);
outb(sr1 | 1<<5, VGA_SR_DATA);
vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
udelay(300);

I915_WRITE(vga_reg, VGA_DISP_DISABLE);
POSTING_READ(vga_reg);
}

void intel_modeset_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;

drm_mode_config_init(dev);

dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;

dev->mode_config.funcs = (void *)&intel_mode_funcs;

intel_init_quirks(dev);

intel_init_display(dev);

if (IS_GEN2(dev)) {
dev->mode_config.max_width = 2048;
dev->mode_config.max_height = 2048;
} else if (IS_GEN3(dev)) {
dev->mode_config.max_width = 4096;
dev->mode_config.max_height = 4096;
} else {
dev->mode_config.max_width = 8192;
dev->mode_config.max_height = 8192;
}
dev->mode_config.fb_base = dev->agp->base;

if (IS_MOBILE(dev) || !IS_GEN2(dev))
dev_priv->num_pipe = 2;
else
dev_priv->num_pipe = 1;
DRM_DEBUG_KMS("%d display pipe%s available.\n",
dev_priv->num_pipe, dev_priv->num_pipe > 1 ? "s" : "");

for (i = 0; i < dev_priv->num_pipe; i++) {
intel_crtc_init(dev, i);
}

intel_setup_outputs(dev);

intel_enable_clock_gating(dev);

/* Just disable it once at startup */
i915_disable_vga(dev);

if (IS_IRONLAKE_M(dev)) {
ironlake_enable_drps(dev);
intel_init_emon(dev);
}

if (IS_GEN6(dev))
gen6_enable_rps(dev_priv);

if (IS_IRONLAKE_M(dev)) {
dev_priv->renderctx = intel_alloc_context_page(dev);
if (!dev_priv->renderctx)
goto skip_rc6;
dev_priv->pwrctx = intel_alloc_context_page(dev);
if (!dev_priv->pwrctx) {
i915_gem_object_unpin(dev_priv->renderctx);
drm_gem_object_unreference(&dev_priv->renderctx->base);
dev_priv->renderctx = NULL;
goto skip_rc6;
}
ironlake_enable_rc6(dev);
}

skip_rc6:
INIT_WORK(&dev_priv->idle_work, intel_idle_update);
setup_timer(&dev_priv->idle_timer, intel_gpu_idle_timer,
(unsigned long)dev);

intel_setup_overlay(dev);
}

void intel_modeset_cleanup(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_crtc *crtc;
struct intel_crtc *intel_crtc;

drm_kms_helper_poll_fini(dev);
mutex_lock(&dev->struct_mutex);

intel_unregister_dsm_handler();

list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
/* Skip inactive CRTCs */
if (!crtc->fb)
continue;

intel_crtc = to_intel_crtc(crtc);
intel_increase_pllclock(crtc);
}

if (dev_priv->display.disable_fbc)
dev_priv->display.disable_fbc(dev);

if (IS_IRONLAKE_M(dev))
ironlake_disable_drps(dev);
if (IS_GEN6(dev))
gen6_disable_rps(dev);

if (IS_IRONLAKE_M(dev))
ironlake_disable_rc6(dev);

mutex_unlock(&dev->struct_mutex);

/* Disable the irq before mode object teardown, for the irq might
* enqueue unpin/hotplug work. */
drm_irq_uninstall(dev);
cancel_work_sync(&dev_priv->hotplug_work);

/* Shut off idle work before the crtcs get freed. */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
intel_crtc = to_intel_crtc(crtc);
del_timer_sync(&intel_crtc->idle_timer);
}
del_timer_sync(&dev_priv->idle_timer);
cancel_work_sync(&dev_priv->idle_work);

drm_mode_config_cleanup(dev);
}

/*
* Return which encoder is currently attached for connector.
*/
struct drm_encoder *intel_best_encoder(struct drm_connector *connector)
{
return &intel_attached_encoder(connector)->base;
}

void intel_connector_attach_encoder(struct intel_connector *connector,
struct intel_encoder *encoder)
{
connector->encoder = encoder;
drm_mode_connector_attach_encoder(&connector->base,
&encoder->base);
}

/*
* set vga decode state - true == enable VGA decode
*/
int intel_modeset_vga_set_state(struct drm_device *dev, bool state)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u16 gmch_ctrl;

pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &gmch_ctrl);
if (state)
gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
else
gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
pci_write_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, gmch_ctrl);
return 0;
}

#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>

struct intel_display_error_state {
struct intel_cursor_error_state {
u32 control;
u32 position;
u32 base;
u32 size;
} cursor[2];

struct intel_pipe_error_state {
u32 conf;
u32 source;

u32 htotal;
u32 hblank;
u32 hsync;
u32 vtotal;
u32 vblank;
u32 vsync;
} pipe[2];

struct intel_plane_error_state {
u32 control;
u32 stride;
u32 size;
u32 pos;
u32 addr;
u32 surface;
u32 tile_offset;
} plane[2];
};

struct intel_display_error_state *
intel_display_capture_error_state(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
struct intel_display_error_state *error;
int i;

error = kmalloc(sizeof(*error), GFP_ATOMIC);
if (error == NULL)
return NULL;

for (i = 0; i < 2; i++) {
error->cursor[i].control = I915_READ(CURCNTR(i));
error->cursor[i].position = I915_READ(CURPOS(i));
error->cursor[i].base = I915_READ(CURBASE(i));

error->plane[i].control = I915_READ(DSPCNTR(i));
error->plane[i].stride = I915_READ(DSPSTRIDE(i));
error->plane[i].size = I915_READ(DSPSIZE(i));
error->plane[i].pos= I915_READ(DSPPOS(i));
error->plane[i].addr = I915_READ(DSPADDR(i));
if (INTEL_INFO(dev)->gen >= 4) {
error->plane[i].surface = I915_READ(DSPSURF(i));
error->plane[i].tile_offset = I915_READ(DSPTILEOFF(i));
}

error->pipe[i].conf = I915_READ(PIPECONF(i));
error->pipe[i].source = I915_READ(PIPESRC(i));
error->pipe[i].htotal = I915_READ(HTOTAL(i));
error->pipe[i].hblank = I915_READ(HBLANK(i));
error->pipe[i].hsync = I915_READ(HSYNC(i));
error->pipe[i].vtotal = I915_READ(VTOTAL(i));
error->pipe[i].vblank = I915_READ(VBLANK(i));
error->pipe[i].vsync = I915_READ(VSYNC(i));
}

return error;
}

void
intel_display_print_error_state(struct seq_file *m,
struct drm_device *dev,
struct intel_display_error_state *error)
{
int i;

for (i = 0; i < 2; i++) {
seq_printf(m, "Pipe [%d]:\n", i);
seq_printf(m, " CONF: %08x\n", error->pipe[i].conf);
seq_printf(m, " SRC: %08x\n", error->pipe[i].source);
seq_printf(m, " HTOTAL: %08x\n", error->pipe[i].htotal);
seq_printf(m, " HBLANK: %08x\n", error->pipe[i].hblank);
seq_printf(m, " HSYNC: %08x\n", error->pipe[i].hsync);
seq_printf(m, " VTOTAL: %08x\n", error->pipe[i].vtotal);
seq_printf(m, " VBLANK: %08x\n", error->pipe[i].vblank);
seq_printf(m, " VSYNC: %08x\n", error->pipe[i].vsync);

seq_printf(m, "Plane [%d]:\n", i);
seq_printf(m, " CNTR: %08x\n", error->plane[i].control);
seq_printf(m, " STRIDE: %08x\n", error->plane[i].stride);
seq_printf(m, " SIZE: %08x\n", error->plane[i].size);
seq_printf(m, " POS: %08x\n", error->plane[i].pos);
seq_printf(m, " ADDR: %08x\n", error->plane[i].addr);
if (INTEL_INFO(dev)->gen >= 4) {
seq_printf(m, " SURF: %08x\n", error->plane[i].surface);
seq_printf(m, " TILEOFF: %08x\n", error->plane[i].tile_offset);
}

seq_printf(m, "Cursor [%d]:\n", i);
seq_printf(m, " CNTR: %08x\n", error->cursor[i].control);
seq_printf(m, " POS: %08x\n", error->cursor[i].position);
seq_printf(m, " BASE: %08x\n", error->cursor[i].base);
}
}
#endif