Supporting fused display configurations

Supporting fused display configurations

[Damien Lespiau]

A while ago, Ben added support for Quanta devices that had the display hardware
fused off. We can a bit more general than that by reading the FUSE_STRAP
register and setting num_pipes to 0 when detecting such condition.

To achieve that, the intel_device_info structure in dev_priv needed to be made
writable, that's patch 1.

Patches 2 to 5 build the support for reading out FUSE_STRAP on IVB+, client
platforms only to detect both "display fused off" and "pipe C fused off"
configurations.

Patch 6 removes the Quanta special-case with the (reasonable) hope that it's
now covered by the DISPLAY_DISABLE bit.

Patch 7 is a bonus, somewhat unrelated, little clean-up patch.

This series is not tested due to lack of such a device, I was hoping Ben still
had the device around somewhere and could give this series a go.

[PATCH 1/7] drm/i915: Make the intel_device_info structure kept in dev_priv writable

[Damien Lespiau]

Turns out it'd be nice to change some device information at run-time or
simply have some code to fill in the info struct instead of having to
declare the values in 30+ structures.

What prompted this change is handling fused out display/pipe and
tweaking num_pipes at run-time, but I'm quite sure we'll find other
flags/limits to stick into dev_priv->info.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c      |   4 +-
 drivers/gpu/drm/i915/i915_drv.h      |   4 +-
 drivers/gpu/drm/i915/i915_gem.c      |   2 +-
 drivers/gpu/drm/i915/i915_irq.c      |   4 +-
 drivers/gpu/drm/i915/i915_reg.h      | 228 +++++++++++++++++------------------
 drivers/gpu/drm/i915/intel_display.c |  20 +--
 drivers/gpu/drm/i915/intel_pm.c      |  12 +-
 7 files changed, 137 insertions(+), 137 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 89e4cf1..63aae7b 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1432,7 +1432,7 @@ static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 
 static void i915_dump_device_info(struct drm_i915_private *dev_priv)
 {
-	const struct intel_device_info *info = dev_priv->info;
+	const struct intel_device_info *info = &dev_priv->info;
 
 #define PRINT_S(name) "%s"
 #define SEP_EMPTY
@@ -1482,7 +1482,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 
 	dev->dev_private = (void *)dev_priv;
 	dev_priv->dev = dev;
-	dev_priv->info = info;
+	memcpy(&dev_priv->info, info, sizeof(*info));
 
 	spin_lock_init(&dev_priv->irq_lock);
 	spin_lock_init(&dev_priv->gpu_error.lock);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 780f815..55ad44e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1323,7 +1323,7 @@ typedef struct drm_i915_private {
 	struct drm_device *dev;
 	struct kmem_cache *slab;
 
-	const struct intel_device_info *info;
+	struct intel_device_info info;
 
 	int relative_constants_mode;
 
@@ -1745,7 +1745,7 @@ struct drm_i915_file_private {
 	atomic_t rps_wait_boost;
 };
 
-#define INTEL_INFO(dev)	(to_i915(dev)->info)
+#define INTEL_INFO(dev)	(&to_i915(dev)->info)
 
 #define IS_I830(dev)		((dev)->pdev->device == 0x3577)
 #define IS_845G(dev)		((dev)->pdev->device == 0x2562)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0ecc735..f196f0b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1027,7 +1027,7 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,
 
 	timeout_jiffies = timeout ? timespec_to_jiffies_timeout(timeout) : 1;
 
-	if (dev_priv->info->gen >= 6 && can_wait_boost(file_priv)) {
+	if (dev_priv->info.gen >= 6 && can_wait_boost(file_priv)) {
 		gen6_rps_boost(dev_priv);
 		if (file_priv)
 			mod_delayed_work(dev_priv->wq,
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 74918e7..e3ddd32 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2209,7 +2209,7 @@ static int i915_enable_vblank(struct drm_device *dev, int pipe)
 				     PIPE_VBLANK_INTERRUPT_ENABLE);
 
 	/* maintain vblank delivery even in deep C-states */
-	if (dev_priv->info->gen == 3)
+	if (dev_priv->info.gen == 3)
 		I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
 	spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
 
@@ -2281,7 +2281,7 @@ static void i915_disable_vblank(struct drm_device *dev, int pipe)
 	unsigned long irqflags;
 
 	spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
-	if (dev_priv->info->gen == 3)
+	if (dev_priv->info.gen == 3)
 		I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
 
 	i915_disable_pipestat(dev_priv, pipe,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 2d20390..7348755 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1211,8 +1211,8 @@
 #define   VGA1_PD_P1_DIV_2	(1 << 13)
 #define   VGA1_PD_P1_SHIFT	8
 #define   VGA1_PD_P1_MASK	(0x1f << 8)
-#define _DPLL_A	(dev_priv->info->display_mmio_offset + 0x6014)
-#define _DPLL_B	(dev_priv->info->display_mmio_offset + 0x6018)
+#define _DPLL_A	(dev_priv->info.display_mmio_offset + 0x6014)
+#define _DPLL_B	(dev_priv->info.display_mmio_offset + 0x6018)
 #define DPLL(pipe) _PIPE(pipe, _DPLL_A, _DPLL_B)
 #define   DPLL_VCO_ENABLE		(1 << 31)
 #define   DPLL_SDVO_HIGH_SPEED		(1 << 30)
@@ -1275,7 +1275,7 @@
 #define   SDVO_MULTIPLIER_MASK			0x000000ff
 #define   SDVO_MULTIPLIER_SHIFT_HIRES		4
 #define   SDVO_MULTIPLIER_SHIFT_VGA		0
-#define _DPLL_A_MD (dev_priv->info->display_mmio_offset + 0x601c) /* 965+ only */
+#define _DPLL_A_MD (dev_priv->info.display_mmio_offset + 0x601c) /* 965+ only */
 /*
  * UDI pixel divider, controlling how many pixels are stuffed into a packet.
  *
@@ -1312,7 +1312,7 @@
  */
 #define   DPLL_MD_VGA_UDI_MULTIPLIER_MASK	0x0000003f
 #define   DPLL_MD_VGA_UDI_MULTIPLIER_SHIFT	0
-#define _DPLL_B_MD (dev_priv->info->display_mmio_offset + 0x6020) /* 965+ only */
+#define _DPLL_B_MD (dev_priv->info.display_mmio_offset + 0x6020) /* 965+ only */
 #define DPLL_MD(pipe) _PIPE(pipe, _DPLL_A_MD, _DPLL_B_MD)
 
 #define _FPA0	0x06040
@@ -1345,7 +1345,7 @@
 #define  DSTATE_PLL_D3_OFF			(1<<3)
 #define  DSTATE_GFX_CLOCK_GATING		(1<<1)
 #define  DSTATE_DOT_CLOCK_GATING		(1<<0)
-#define DSPCLK_GATE_D	(dev_priv->info->display_mmio_offset + 0x6200)
+#define DSPCLK_GATE_D	(dev_priv->info.display_mmio_offset + 0x6200)
 # define DPUNIT_B_CLOCK_GATE_DISABLE		(1 << 30) /* 965 */
 # define VSUNIT_CLOCK_GATE_DISABLE		(1 << 29) /* 965 */
 # define VRHUNIT_CLOCK_GATE_DISABLE		(1 << 28) /* 965 */
@@ -1470,8 +1470,8 @@
  * Palette regs
  */
 
-#define _PALETTE_A		(dev_priv->info->display_mmio_offset + 0xa000)
-#define _PALETTE_B		(dev_priv->info->display_mmio_offset + 0xa800)
+#define _PALETTE_A		(dev_priv->info.display_mmio_offset + 0xa000)
+#define _PALETTE_B		(dev_priv->info.display_mmio_offset + 0xa800)
 #define PALETTE(pipe) _PIPE(pipe, _PALETTE_A, _PALETTE_B)
 
 /* MCH MMIO space */
@@ -1859,7 +1859,7 @@
  */
 
 /* Pipe A CRC regs */
-#define _PIPE_CRC_CTL_A		(dev_priv->info->display_mmio_offset + 0x60050)
+#define _PIPE_CRC_CTL_A		(dev_priv->info.display_mmio_offset + 0x60050)
 #define   PIPE_CRC_ENABLE		(1 << 31)
 /* ivb+ source selection */
 #define   PIPE_CRC_SOURCE_PRIMARY_IVB	(0 << 29)
@@ -1899,11 +1899,11 @@
 #define _PIPE_CRC_RES_4_A_IVB		0x60070
 #define _PIPE_CRC_RES_5_A_IVB		0x60074
 
-#define _PIPE_CRC_RES_RED_A		(dev_priv->info->display_mmio_offset + 0x60060)
-#define _PIPE_CRC_RES_GREEN_A		(dev_priv->info->display_mmio_offset + 0x60064)
-#define _PIPE_CRC_RES_BLUE_A		(dev_priv->info->display_mmio_offset + 0x60068)
-#define _PIPE_CRC_RES_RES1_A_I915	(dev_priv->info->display_mmio_offset + 0x6006c)
-#define _PIPE_CRC_RES_RES2_A_G4X	(dev_priv->info->display_mmio_offset + 0x60080)
+#define _PIPE_CRC_RES_RED_A		(dev_priv->info.display_mmio_offset + 0x60060)
+#define _PIPE_CRC_RES_GREEN_A		(dev_priv->info.display_mmio_offset + 0x60064)
+#define _PIPE_CRC_RES_BLUE_A		(dev_priv->info.display_mmio_offset + 0x60068)
+#define _PIPE_CRC_RES_RES1_A_I915	(dev_priv->info.display_mmio_offset + 0x6006c)
+#define _PIPE_CRC_RES_RES2_A_G4X	(dev_priv->info.display_mmio_offset + 0x60080)
 
 /* Pipe B CRC regs */
 #define _PIPE_CRC_RES_1_B_IVB		0x61064
@@ -1936,26 +1936,26 @@
 	_PIPE_INC(pipe, _PIPE_CRC_RES_RES2_A_G4X, 0x01000)
 
 /* Pipe A timing regs */
-#define _HTOTAL_A	(dev_priv->info->display_mmio_offset + 0x60000)
-#define _HBLANK_A	(dev_priv->info->display_mmio_offset + 0x60004)
-#define _HSYNC_A	(dev_priv->info->display_mmio_offset + 0x60008)
-#define _VTOTAL_A	(dev_priv->info->display_mmio_offset + 0x6000c)
-#define _VBLANK_A	(dev_priv->info->display_mmio_offset + 0x60010)
-#define _VSYNC_A	(dev_priv->info->display_mmio_offset + 0x60014)
-#define _PIPEASRC	(dev_priv->info->display_mmio_offset + 0x6001c)
-#define _BCLRPAT_A	(dev_priv->info->display_mmio_offset + 0x60020)
-#define _VSYNCSHIFT_A	(dev_priv->info->display_mmio_offset + 0x60028)
+#define _HTOTAL_A	(dev_priv->info.display_mmio_offset + 0x60000)
+#define _HBLANK_A	(dev_priv->info.display_mmio_offset + 0x60004)
+#define _HSYNC_A	(dev_priv->info.display_mmio_offset + 0x60008)
+#define _VTOTAL_A	(dev_priv->info.display_mmio_offset + 0x6000c)
+#define _VBLANK_A	(dev_priv->info.display_mmio_offset + 0x60010)
+#define _VSYNC_A	(dev_priv->info.display_mmio_offset + 0x60014)
+#define _PIPEASRC	(dev_priv->info.display_mmio_offset + 0x6001c)
+#define _BCLRPAT_A	(dev_priv->info.display_mmio_offset + 0x60020)
+#define _VSYNCSHIFT_A	(dev_priv->info.display_mmio_offset + 0x60028)
 
 /* Pipe B timing regs */
-#define _HTOTAL_B	(dev_priv->info->display_mmio_offset + 0x61000)
-#define _HBLANK_B	(dev_priv->info->display_mmio_offset + 0x61004)
-#define _HSYNC_B	(dev_priv->info->display_mmio_offset + 0x61008)
-#define _VTOTAL_B	(dev_priv->info->display_mmio_offset + 0x6100c)
-#define _VBLANK_B	(dev_priv->info->display_mmio_offset + 0x61010)
-#define _VSYNC_B	(dev_priv->info->display_mmio_offset + 0x61014)
-#define _PIPEBSRC	(dev_priv->info->display_mmio_offset + 0x6101c)
-#define _BCLRPAT_B	(dev_priv->info->display_mmio_offset + 0x61020)
-#define _VSYNCSHIFT_B	(dev_priv->info->display_mmio_offset + 0x61028)
+#define _HTOTAL_B	(dev_priv->info.display_mmio_offset + 0x61000)
+#define _HBLANK_B	(dev_priv->info.display_mmio_offset + 0x61004)
+#define _HSYNC_B	(dev_priv->info.display_mmio_offset + 0x61008)
+#define _VTOTAL_B	(dev_priv->info.display_mmio_offset + 0x6100c)
+#define _VBLANK_B	(dev_priv->info.display_mmio_offset + 0x61010)
+#define _VSYNC_B	(dev_priv->info.display_mmio_offset + 0x61014)
+#define _PIPEBSRC	(dev_priv->info.display_mmio_offset + 0x6101c)
+#define _BCLRPAT_B	(dev_priv->info.display_mmio_offset + 0x61020)
+#define _VSYNCSHIFT_B	(dev_priv->info.display_mmio_offset + 0x61028)
 
 #define HTOTAL(trans) _TRANSCODER(trans, _HTOTAL_A, _HTOTAL_B)
 #define HBLANK(trans) _TRANSCODER(trans, _HBLANK_A, _HBLANK_B)
@@ -2081,7 +2081,7 @@
 
 
 /* Hotplug control (945+ only) */
-#define PORT_HOTPLUG_EN		(dev_priv->info->display_mmio_offset + 0x61110)
+#define PORT_HOTPLUG_EN		(dev_priv->info.display_mmio_offset + 0x61110)
 #define   PORTB_HOTPLUG_INT_EN			(1 << 29)
 #define   PORTC_HOTPLUG_INT_EN			(1 << 28)
 #define   PORTD_HOTPLUG_INT_EN			(1 << 27)
@@ -2111,7 +2111,7 @@
 #define CRT_HOTPLUG_DETECT_VOLTAGE_325MV	(0 << 2)
 #define CRT_HOTPLUG_DETECT_VOLTAGE_475MV	(1 << 2)
 
-#define PORT_HOTPLUG_STAT	(dev_priv->info->display_mmio_offset + 0x61114)
+#define PORT_HOTPLUG_STAT	(dev_priv->info.display_mmio_offset + 0x61114)
 /*
  * HDMI/DP bits are gen4+
  *
@@ -2383,7 +2383,7 @@
 #define PP_DIVISOR	0x61210
 
 /* Panel fitting */
-#define PFIT_CONTROL	(dev_priv->info->display_mmio_offset + 0x61230)
+#define PFIT_CONTROL	(dev_priv->info.display_mmio_offset + 0x61230)
 #define   PFIT_ENABLE		(1 << 31)
 #define   PFIT_PIPE_MASK	(3 << 29)
 #define   PFIT_PIPE_SHIFT	29
@@ -2401,7 +2401,7 @@
 #define   PFIT_SCALING_PROGRAMMED (1 << 26)
 #define   PFIT_SCALING_PILLAR	(2 << 26)
 #define   PFIT_SCALING_LETTER	(3 << 26)
-#define PFIT_PGM_RATIOS	(dev_priv->info->display_mmio_offset + 0x61234)
+#define PFIT_PGM_RATIOS	(dev_priv->info.display_mmio_offset + 0x61234)
 /* Pre-965 */
 #define		PFIT_VERT_SCALE_SHIFT		20
 #define		PFIT_VERT_SCALE_MASK		0xfff00000
@@ -2413,25 +2413,25 @@
 #define		PFIT_HORIZ_SCALE_SHIFT_965	0
 #define		PFIT_HORIZ_SCALE_MASK_965	0x00001fff
 
-#define PFIT_AUTO_RATIOS (dev_priv->info->display_mmio_offset + 0x61238)
+#define PFIT_AUTO_RATIOS (dev_priv->info.display_mmio_offset + 0x61238)
 
-#define _VLV_BLC_PWM_CTL2_A (dev_priv->info->display_mmio_offset + 0x61250)
-#define _VLV_BLC_PWM_CTL2_B (dev_priv->info->display_mmio_offset + 0x61350)
+#define _VLV_BLC_PWM_CTL2_A (dev_priv->info.display_mmio_offset + 0x61250)
+#define _VLV_BLC_PWM_CTL2_B (dev_priv->info.display_mmio_offset + 0x61350)
 #define VLV_BLC_PWM_CTL2(pipe) _PIPE(pipe, _VLV_BLC_PWM_CTL2_A, \
 				     _VLV_BLC_PWM_CTL2_B)
 
-#define _VLV_BLC_PWM_CTL_A (dev_priv->info->display_mmio_offset + 0x61254)
-#define _VLV_BLC_PWM_CTL_B (dev_priv->info->display_mmio_offset + 0x61354)
+#define _VLV_BLC_PWM_CTL_A (dev_priv->info.display_mmio_offset + 0x61254)
+#define _VLV_BLC_PWM_CTL_B (dev_priv->info.display_mmio_offset + 0x61354)
 #define VLV_BLC_PWM_CTL(pipe) _PIPE(pipe, _VLV_BLC_PWM_CTL_A, \
 				    _VLV_BLC_PWM_CTL_B)
 
-#define _VLV_BLC_HIST_CTL_A (dev_priv->info->display_mmio_offset + 0x61260)
-#define _VLV_BLC_HIST_CTL_B (dev_priv->info->display_mmio_offset + 0x61360)
+#define _VLV_BLC_HIST_CTL_A (dev_priv->info.display_mmio_offset + 0x61260)
+#define _VLV_BLC_HIST_CTL_B (dev_priv->info.display_mmio_offset + 0x61360)
 #define VLV_BLC_HIST_CTL(pipe) _PIPE(pipe, _VLV_BLC_HIST_CTL_A, \
 				     _VLV_BLC_HIST_CTL_B)
 
 /* Backlight control */
-#define BLC_PWM_CTL2	(dev_priv->info->display_mmio_offset + 0x61250) /* 965+ only */
+#define BLC_PWM_CTL2	(dev_priv->info.display_mmio_offset + 0x61250) /* 965+ only */
 #define   BLM_PWM_ENABLE		(1 << 31)
 #define   BLM_COMBINATION_MODE		(1 << 30) /* gen4 only */
 #define   BLM_PIPE_SELECT		(1 << 29)
@@ -2454,7 +2454,7 @@
 #define   BLM_PHASE_IN_COUNT_MASK	(0xff << 8)
 #define   BLM_PHASE_IN_INCR_SHIFT	(0)
 #define   BLM_PHASE_IN_INCR_MASK	(0xff << 0)
-#define BLC_PWM_CTL	(dev_priv->info->display_mmio_offset + 0x61254)
+#define BLC_PWM_CTL	(dev_priv->info.display_mmio_offset + 0x61254)
 /*
  * This is the most significant 15 bits of the number of backlight cycles in a
  * complete cycle of the modulated backlight control.
@@ -2476,7 +2476,7 @@
 #define   BACKLIGHT_DUTY_CYCLE_MASK_PNV		(0xfffe)
 #define   BLM_POLARITY_PNV			(1 << 0) /* pnv only */
 
-#define BLC_HIST_CTL	(dev_priv->info->display_mmio_offset + 0x61260)
+#define BLC_HIST_CTL	(dev_priv->info.display_mmio_offset + 0x61260)
 
 /* New registers for PCH-split platforms. Safe where new bits show up, the
  * register layout machtes with gen4 BLC_PWM_CTL[12]. */
@@ -3170,10 +3170,10 @@
 /* Display & cursor control */
 
 /* Pipe A */
-#define _PIPEADSL		(dev_priv->info->display_mmio_offset + 0x70000)
+#define _PIPEADSL		(dev_priv->info.display_mmio_offset + 0x70000)
 #define   DSL_LINEMASK_GEN2	0x00000fff
 #define   DSL_LINEMASK_GEN3	0x00001fff
-#define _PIPEACONF		(dev_priv->info->display_mmio_offset + 0x70008)
+#define _PIPEACONF		(dev_priv->info.display_mmio_offset + 0x70008)
 #define   PIPECONF_ENABLE	(1<<31)
 #define   PIPECONF_DISABLE	0
 #define   PIPECONF_DOUBLE_WIDE	(1<<30)
@@ -3216,7 +3216,7 @@
 #define   PIPECONF_DITHER_TYPE_ST1 (1<<2)
 #define   PIPECONF_DITHER_TYPE_ST2 (2<<2)
 #define   PIPECONF_DITHER_TYPE_TEMP (3<<2)
-#define _PIPEASTAT		(dev_priv->info->display_mmio_offset + 0x70024)
+#define _PIPEASTAT		(dev_priv->info.display_mmio_offset + 0x70024)
 #define   PIPE_FIFO_UNDERRUN_STATUS		(1UL<<31)
 #define   SPRITE1_FLIPDONE_INT_EN_VLV		(1UL<<30)
 #define   PIPE_CRC_ERROR_ENABLE			(1UL<<29)
@@ -3315,7 +3315,7 @@
 #define   DSPARB_BEND_SHIFT	9 /* on 855 */
 #define   DSPARB_AEND_SHIFT	0
 
-#define DSPFW1			(dev_priv->info->display_mmio_offset + 0x70034)
+#define DSPFW1			(dev_priv->info.display_mmio_offset + 0x70034)
 #define   DSPFW_SR_SHIFT	23
 #define   DSPFW_SR_MASK		(0x1ff<<23)
 #define   DSPFW_CURSORB_SHIFT	16
@@ -3323,11 +3323,11 @@
 #define   DSPFW_PLANEB_SHIFT	8
 #define   DSPFW_PLANEB_MASK	(0x7f<<8)
 #define   DSPFW_PLANEA_MASK	(0x7f)
-#define DSPFW2			(dev_priv->info->display_mmio_offset + 0x70038)
+#define DSPFW2			(dev_priv->info.display_mmio_offset + 0x70038)
 #define   DSPFW_CURSORA_MASK	0x00003f00
 #define   DSPFW_CURSORA_SHIFT	8
 #define   DSPFW_PLANEC_MASK	(0x7f)
-#define DSPFW3			(dev_priv->info->display_mmio_offset + 0x7003c)
+#define DSPFW3			(dev_priv->info.display_mmio_offset + 0x7003c)
 #define   DSPFW_HPLL_SR_EN	(1<<31)
 #define   DSPFW_CURSOR_SR_SHIFT	24
 #define   PINEVIEW_SELF_REFRESH_EN	(1<<30)
@@ -3335,8 +3335,8 @@
 #define   DSPFW_HPLL_CURSOR_SHIFT	16
 #define   DSPFW_HPLL_CURSOR_MASK	(0x3f<<16)
 #define   DSPFW_HPLL_SR_MASK		(0x1ff)
-#define DSPFW4			(dev_priv->info->display_mmio_offset + 0x70070)
-#define DSPFW7			(dev_priv->info->display_mmio_offset + 0x7007c)
+#define DSPFW4			(dev_priv->info.display_mmio_offset + 0x70070)
+#define DSPFW7			(dev_priv->info.display_mmio_offset + 0x7007c)
 
 /* drain latency register values*/
 #define DRAIN_LATENCY_PRECISION_32	32
@@ -3496,12 +3496,12 @@
 #define   PIPE_PIXEL_MASK         0x00ffffff
 #define   PIPE_PIXEL_SHIFT        0
 /* GM45+ just has to be different */
-#define _PIPEA_FRMCOUNT_GM45	(dev_priv->info->display_mmio_offset + 0x70040)
-#define _PIPEA_FLIPCOUNT_GM45	(dev_priv->info->display_mmio_offset + 0x70044)
+#define _PIPEA_FRMCOUNT_GM45	(dev_priv->info.display_mmio_offset + 0x70040)
+#define _PIPEA_FLIPCOUNT_GM45	(dev_priv->info.display_mmio_offset + 0x70044)
 #define PIPE_FRMCOUNT_GM45(pipe) _PIPE(pipe, _PIPEA_FRMCOUNT_GM45, _PIPEB_FRMCOUNT_GM45)
 
 /* Cursor A & B regs */
-#define _CURACNTR		(dev_priv->info->display_mmio_offset + 0x70080)
+#define _CURACNTR		(dev_priv->info.display_mmio_offset + 0x70080)
 /* Old style CUR*CNTR flags (desktop 8xx) */
 #define   CURSOR_ENABLE		0x80000000
 #define   CURSOR_GAMMA_ENABLE	0x40000000
@@ -3524,16 +3524,16 @@
 #define   MCURSOR_PIPE_B	(1 << 28)
 #define   MCURSOR_GAMMA_ENABLE  (1 << 26)
 #define   CURSOR_TRICKLE_FEED_DISABLE	(1 << 14)
-#define _CURABASE		(dev_priv->info->display_mmio_offset + 0x70084)
-#define _CURAPOS		(dev_priv->info->display_mmio_offset + 0x70088)
+#define _CURABASE		(dev_priv->info.display_mmio_offset + 0x70084)
+#define _CURAPOS		(dev_priv->info.display_mmio_offset + 0x70088)
 #define   CURSOR_POS_MASK       0x007FF
 #define   CURSOR_POS_SIGN       0x8000
 #define   CURSOR_X_SHIFT        0
 #define   CURSOR_Y_SHIFT        16
 #define CURSIZE			0x700a0
-#define _CURBCNTR		(dev_priv->info->display_mmio_offset + 0x700c0)
-#define _CURBBASE		(dev_priv->info->display_mmio_offset + 0x700c4)
-#define _CURBPOS		(dev_priv->info->display_mmio_offset + 0x700c8)
+#define _CURBCNTR		(dev_priv->info.display_mmio_offset + 0x700c0)
+#define _CURBBASE		(dev_priv->info.display_mmio_offset + 0x700c4)
+#define _CURBPOS		(dev_priv->info.display_mmio_offset + 0x700c8)
 
 #define _CURBCNTR_IVB		0x71080
 #define _CURBBASE_IVB		0x71084
@@ -3548,7 +3548,7 @@
 #define CURPOS_IVB(pipe) _PIPE(pipe, _CURAPOS, _CURBPOS_IVB)
 
 /* Display A control */
-#define _DSPACNTR                (dev_priv->info->display_mmio_offset + 0x70180)
+#define _DSPACNTR                (dev_priv->info.display_mmio_offset + 0x70180)
 #define   DISPLAY_PLANE_ENABLE			(1<<31)
 #define   DISPLAY_PLANE_DISABLE			0
 #define   DISPPLANE_GAMMA_ENABLE		(1<<30)
@@ -3582,14 +3582,14 @@
 #define   DISPPLANE_STEREO_POLARITY_SECOND	(1<<18)
 #define   DISPPLANE_TRICKLE_FEED_DISABLE	(1<<14) /* Ironlake */
 #define   DISPPLANE_TILED			(1<<10)
-#define _DSPAADDR		(dev_priv->info->display_mmio_offset + 0x70184)
-#define _DSPASTRIDE		(dev_priv->info->display_mmio_offset + 0x70188)
-#define _DSPAPOS		(dev_priv->info->display_mmio_offset + 0x7018C) /* reserved */
-#define _DSPASIZE		(dev_priv->info->display_mmio_offset + 0x70190)
-#define _DSPASURF		(dev_priv->info->display_mmio_offset + 0x7019C) /* 965+ only */
-#define _DSPATILEOFF		(dev_priv->info->display_mmio_offset + 0x701A4) /* 965+ only */
-#define _DSPAOFFSET		(dev_priv->info->display_mmio_offset + 0x701A4) /* HSW */
-#define _DSPASURFLIVE		(dev_priv->info->display_mmio_offset + 0x701AC)
+#define _DSPAADDR		(dev_priv->info.display_mmio_offset + 0x70184)
+#define _DSPASTRIDE		(dev_priv->info.display_mmio_offset + 0x70188)
+#define _DSPAPOS		(dev_priv->info.display_mmio_offset + 0x7018C) /* reserved */
+#define _DSPASIZE		(dev_priv->info.display_mmio_offset + 0x70190)
+#define _DSPASURF		(dev_priv->info.display_mmio_offset + 0x7019C) /* 965+ only */
+#define _DSPATILEOFF		(dev_priv->info.display_mmio_offset + 0x701A4) /* 965+ only */
+#define _DSPAOFFSET		(dev_priv->info.display_mmio_offset + 0x701A4) /* HSW */
+#define _DSPASURFLIVE		(dev_priv->info.display_mmio_offset + 0x701AC)
 
 #define DSPCNTR(plane) _PIPE(plane, _DSPACNTR, _DSPBCNTR)
 #define DSPADDR(plane) _PIPE(plane, _DSPAADDR, _DSPBADDR)
@@ -3610,44 +3610,44 @@
 		(I915_WRITE((reg), (gfx_addr) | I915_LO_DISPBASE(I915_READ(reg))))
 
 /* VBIOS flags */
-#define SWF00			(dev_priv->info->display_mmio_offset + 0x71410)
-#define SWF01			(dev_priv->info->display_mmio_offset + 0x71414)
-#define SWF02			(dev_priv->info->display_mmio_offset + 0x71418)
-#define SWF03			(dev_priv->info->display_mmio_offset + 0x7141c)
-#define SWF04			(dev_priv->info->display_mmio_offset + 0x71420)
-#define SWF05			(dev_priv->info->display_mmio_offset + 0x71424)
-#define SWF06			(dev_priv->info->display_mmio_offset + 0x71428)
-#define SWF10			(dev_priv->info->display_mmio_offset + 0x70410)
-#define SWF11			(dev_priv->info->display_mmio_offset + 0x70414)
-#define SWF14			(dev_priv->info->display_mmio_offset + 0x71420)
-#define SWF30			(dev_priv->info->display_mmio_offset + 0x72414)
-#define SWF31			(dev_priv->info->display_mmio_offset + 0x72418)
-#define SWF32			(dev_priv->info->display_mmio_offset + 0x7241c)
+#define SWF00			(dev_priv->info.display_mmio_offset + 0x71410)
+#define SWF01			(dev_priv->info.display_mmio_offset + 0x71414)
+#define SWF02			(dev_priv->info.display_mmio_offset + 0x71418)
+#define SWF03			(dev_priv->info.display_mmio_offset + 0x7141c)
+#define SWF04			(dev_priv->info.display_mmio_offset + 0x71420)
+#define SWF05			(dev_priv->info.display_mmio_offset + 0x71424)
+#define SWF06			(dev_priv->info.display_mmio_offset + 0x71428)
+#define SWF10			(dev_priv->info.display_mmio_offset + 0x70410)
+#define SWF11			(dev_priv->info.display_mmio_offset + 0x70414)
+#define SWF14			(dev_priv->info.display_mmio_offset + 0x71420)
+#define SWF30			(dev_priv->info.display_mmio_offset + 0x72414)
+#define SWF31			(dev_priv->info.display_mmio_offset + 0x72418)
+#define SWF32			(dev_priv->info.display_mmio_offset + 0x7241c)
 
 /* Pipe B */
-#define _PIPEBDSL		(dev_priv->info->display_mmio_offset + 0x71000)
-#define _PIPEBCONF		(dev_priv->info->display_mmio_offset + 0x71008)
-#define _PIPEBSTAT		(dev_priv->info->display_mmio_offset + 0x71024)
+#define _PIPEBDSL		(dev_priv->info.display_mmio_offset + 0x71000)
+#define _PIPEBCONF		(dev_priv->info.display_mmio_offset + 0x71008)
+#define _PIPEBSTAT		(dev_priv->info.display_mmio_offset + 0x71024)
 #define _PIPEBFRAMEHIGH		0x71040
 #define _PIPEBFRAMEPIXEL	0x71044
-#define _PIPEB_FRMCOUNT_GM45	(dev_priv->info->display_mmio_offset + 0x71040)
-#define _PIPEB_FLIPCOUNT_GM45	(dev_priv->info->display_mmio_offset + 0x71044)
+#define _PIPEB_FRMCOUNT_GM45	(dev_priv->info.display_mmio_offset + 0x71040)
+#define _PIPEB_FLIPCOUNT_GM45	(dev_priv->info.display_mmio_offset + 0x71044)
 
 
 /* Display B control */
-#define _DSPBCNTR		(dev_priv->info->display_mmio_offset + 0x71180)
+#define _DSPBCNTR		(dev_priv->info.display_mmio_offset + 0x71180)
 #define   DISPPLANE_ALPHA_TRANS_ENABLE		(1<<15)
 #define   DISPPLANE_ALPHA_TRANS_DISABLE		0
 #define   DISPPLANE_SPRITE_ABOVE_DISPLAY	0
 #define   DISPPLANE_SPRITE_ABOVE_OVERLAY	(1)
-#define _DSPBADDR		(dev_priv->info->display_mmio_offset + 0x71184)
-#define _DSPBSTRIDE		(dev_priv->info->display_mmio_offset + 0x71188)
-#define _DSPBPOS		(dev_priv->info->display_mmio_offset + 0x7118C)
-#define _DSPBSIZE		(dev_priv->info->display_mmio_offset + 0x71190)
-#define _DSPBSURF		(dev_priv->info->display_mmio_offset + 0x7119C)
-#define _DSPBTILEOFF		(dev_priv->info->display_mmio_offset + 0x711A4)
-#define _DSPBOFFSET		(dev_priv->info->display_mmio_offset + 0x711A4)
-#define _DSPBSURFLIVE		(dev_priv->info->display_mmio_offset + 0x711AC)
+#define _DSPBADDR		(dev_priv->info.display_mmio_offset + 0x71184)
+#define _DSPBSTRIDE		(dev_priv->info.display_mmio_offset + 0x71188)
+#define _DSPBPOS		(dev_priv->info.display_mmio_offset + 0x7118C)
+#define _DSPBSIZE		(dev_priv->info.display_mmio_offset + 0x71190)
+#define _DSPBSURF		(dev_priv->info.display_mmio_offset + 0x7119C)
+#define _DSPBTILEOFF		(dev_priv->info.display_mmio_offset + 0x711A4)
+#define _DSPBOFFSET		(dev_priv->info.display_mmio_offset + 0x711A4)
+#define _DSPBSURFLIVE		(dev_priv->info.display_mmio_offset + 0x711AC)
 
 /* Sprite A control */
 #define _DVSACNTR		0x72180
@@ -3896,39 +3896,39 @@
 #define  FDI_PLL_FREQ_DISABLE_COUNT_LIMIT_MASK  0xff
 
 
-#define _PIPEA_DATA_M1           (dev_priv->info->display_mmio_offset + 0x60030)
+#define _PIPEA_DATA_M1           (dev_priv->info.display_mmio_offset + 0x60030)
 #define  PIPE_DATA_M1_OFFSET    0
-#define _PIPEA_DATA_N1           (dev_priv->info->display_mmio_offset + 0x60034)
+#define _PIPEA_DATA_N1           (dev_priv->info.display_mmio_offset + 0x60034)
 #define  PIPE_DATA_N1_OFFSET    0
 
-#define _PIPEA_DATA_M2           (dev_priv->info->display_mmio_offset + 0x60038)
+#define _PIPEA_DATA_M2           (dev_priv->info.display_mmio_offset + 0x60038)
 #define  PIPE_DATA_M2_OFFSET    0
-#define _PIPEA_DATA_N2           (dev_priv->info->display_mmio_offset + 0x6003c)
+#define _PIPEA_DATA_N2           (dev_priv->info.display_mmio_offset + 0x6003c)
 #define  PIPE_DATA_N2_OFFSET    0
 
-#define _PIPEA_LINK_M1           (dev_priv->info->display_mmio_offset + 0x60040)
+#define _PIPEA_LINK_M1           (dev_priv->info.display_mmio_offset + 0x60040)
 #define  PIPE_LINK_M1_OFFSET    0
-#define _PIPEA_LINK_N1           (dev_priv->info->display_mmio_offset + 0x60044)
+#define _PIPEA_LINK_N1           (dev_priv->info.display_mmio_offset + 0x60044)
 #define  PIPE_LINK_N1_OFFSET    0
 
-#define _PIPEA_LINK_M2           (dev_priv->info->display_mmio_offset + 0x60048)
+#define _PIPEA_LINK_M2           (dev_priv->info.display_mmio_offset + 0x60048)
 #define  PIPE_LINK_M2_OFFSET    0
-#define _PIPEA_LINK_N2           (dev_priv->info->display_mmio_offset + 0x6004c)
+#define _PIPEA_LINK_N2           (dev_priv->info.display_mmio_offset + 0x6004c)
 #define  PIPE_LINK_N2_OFFSET    0
 
 /* PIPEB timing regs are same start from 0x61000 */
 
-#define _PIPEB_DATA_M1           (dev_priv->info->display_mmio_offset + 0x61030)
-#define _PIPEB_DATA_N1           (dev_priv->info->display_mmio_offset + 0x61034)
+#define _PIPEB_DATA_M1           (dev_priv->info.display_mmio_offset + 0x61030)
+#define _PIPEB_DATA_N1           (dev_priv->info.display_mmio_offset + 0x61034)
 
-#define _PIPEB_DATA_M2           (dev_priv->info->display_mmio_offset + 0x61038)
-#define _PIPEB_DATA_N2           (dev_priv->info->display_mmio_offset + 0x6103c)
+#define _PIPEB_DATA_M2           (dev_priv->info.display_mmio_offset + 0x61038)
+#define _PIPEB_DATA_N2           (dev_priv->info.display_mmio_offset + 0x6103c)
 
-#define _PIPEB_LINK_M1           (dev_priv->info->display_mmio_offset + 0x61040)
-#define _PIPEB_LINK_N1           (dev_priv->info->display_mmio_offset + 0x61044)
+#define _PIPEB_LINK_M1           (dev_priv->info.display_mmio_offset + 0x61040)
+#define _PIPEB_LINK_N1           (dev_priv->info.display_mmio_offset + 0x61044)
 
-#define _PIPEB_LINK_M2           (dev_priv->info->display_mmio_offset + 0x61048)
-#define _PIPEB_LINK_N2           (dev_priv->info->display_mmio_offset + 0x6104c)
+#define _PIPEB_LINK_M2           (dev_priv->info.display_mmio_offset + 0x61048)
+#define _PIPEB_LINK_N2           (dev_priv->info.display_mmio_offset + 0x6104c)
 
 #define PIPE_DATA_M1(tran) _TRANSCODER(tran, _PIPEA_DATA_M1, _PIPEB_DATA_M1)
 #define PIPE_DATA_N1(tran) _TRANSCODER(tran, _PIPEA_DATA_N1, _PIPEB_DATA_N1)
@@ -5039,7 +5039,7 @@
 #define   GEN8_CENTROID_PIXEL_OPT_DIS	(1<<8)
 #define   GEN8_SAMPLER_POWER_BYPASS_DIS	(1<<1)
 
-#define G4X_AUD_VID_DID			(dev_priv->info->display_mmio_offset + 0x62020)
+#define G4X_AUD_VID_DID			(dev_priv->info.display_mmio_offset + 0x62020)
 #define INTEL_AUDIO_DEVCL		0x808629FB
 #define INTEL_AUDIO_DEVBLC		0x80862801
 #define INTEL_AUDIO_DEVCTG		0x80862802
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3c59b67..8b50b5f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1030,7 +1030,7 @@ static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
 	u32 val;
 
 	/* ILK FDI PLL is always enabled */
-	if (dev_priv->info->gen == 5)
+	if (dev_priv->info.gen == 5)
 		return;
 
 	/* On Haswell, DDI ports are responsible for the FDI PLL setup */
@@ -1429,7 +1429,7 @@ static void i9xx_enable_pll(struct intel_crtc *crtc)
 	assert_pipe_disabled(dev_priv, crtc->pipe);
 
 	/* No really, not for ILK+ */
-	BUG_ON(dev_priv->info->gen >= 5);
+	BUG_ON(dev_priv->info.gen >= 5);
 
 	/* PLL is protected by panel, make sure we can write it */
 	if (IS_MOBILE(dev) && !IS_I830(dev))
@@ -1536,7 +1536,7 @@ static void ironlake_enable_shared_dpll(struct intel_crtc *crtc)
 	struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
 
 	/* PCH PLLs only available on ILK, SNB and IVB */
-	BUG_ON(dev_priv->info->gen < 5);
+	BUG_ON(dev_priv->info.gen < 5);
 	if (WARN_ON(pll == NULL))
 		return;
 
@@ -1565,7 +1565,7 @@ static void intel_disable_shared_dpll(struct intel_crtc *crtc)
 	struct intel_shared_dpll *pll = intel_crtc_to_shared_dpll(crtc);
 
 	/* PCH only available on ILK+ */
-	BUG_ON(dev_priv->info->gen < 5);
+	BUG_ON(dev_priv->info.gen < 5);
 	if (WARN_ON(pll == NULL))
 	       return;
 
@@ -1600,7 +1600,7 @@ static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
 	uint32_t reg, val, pipeconf_val;
 
 	/* PCH only available on ILK+ */
-	BUG_ON(dev_priv->info->gen < 5);
+	BUG_ON(dev_priv->info.gen < 5);
 
 	/* Make sure PCH DPLL is enabled */
 	assert_shared_dpll_enabled(dev_priv,
@@ -1653,7 +1653,7 @@ static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
 	u32 val, pipeconf_val;
 
 	/* PCH only available on ILK+ */
-	BUG_ON(dev_priv->info->gen < 5);
+	BUG_ON(dev_priv->info.gen < 5);
 
 	/* FDI must be feeding us bits for PCH ports */
 	assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
@@ -1834,7 +1834,7 @@ static void intel_disable_pipe(struct drm_i915_private *dev_priv,
 void intel_flush_primary_plane(struct drm_i915_private *dev_priv,
 			       enum plane plane)
 {
-	u32 reg = dev_priv->info->gen >= 4 ? DSPSURF(plane) : DSPADDR(plane);
+	u32 reg = dev_priv->info.gen >= 4 ? DSPSURF(plane) : DSPADDR(plane);
 
 	I915_WRITE(reg, I915_READ(reg));
 	POSTING_READ(reg);
@@ -7521,7 +7521,7 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 
 	/* 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 (!dev_priv->info.cursor_needs_physical) {
 		unsigned alignment;
 
 		if (obj->tiling_mode) {
@@ -7569,7 +7569,7 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 
  finish:
 	if (intel_crtc->cursor_bo) {
-		if (dev_priv->info->cursor_needs_physical) {
+		if (dev_priv->info.cursor_needs_physical) {
 			if (intel_crtc->cursor_bo != obj)
 				i915_gem_detach_phys_object(dev, intel_crtc->cursor_bo);
 		} else
@@ -8147,7 +8147,7 @@ void intel_mark_idle(struct drm_device *dev)
 		intel_decrease_pllclock(crtc);
 	}
 
-	if (dev_priv->info->gen >= 6)
+	if (dev_priv->info.gen >= 6)
 		gen6_rps_idle(dev->dev_private);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a23eb27..711a213 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3585,7 +3585,7 @@ void gen6_rps_idle(struct drm_i915_private *dev_priv)
 {
 	mutex_lock(&dev_priv->rps.hw_lock);
 	if (dev_priv->rps.enabled) {
-		if (dev_priv->info->is_valleyview)
+		if (dev_priv->info.is_valleyview)
 			valleyview_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
 		else
 			gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
@@ -3598,7 +3598,7 @@ void gen6_rps_boost(struct drm_i915_private *dev_priv)
 {
 	mutex_lock(&dev_priv->rps.hw_lock);
 	if (dev_priv->rps.enabled) {
-		if (dev_priv->info->is_valleyview)
+		if (dev_priv->info.is_valleyview)
 			valleyview_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
 		else
 			gen6_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
@@ -4367,7 +4367,7 @@ unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
 {
 	unsigned long val;
 
-	if (dev_priv->info->gen != 5)
+	if (dev_priv->info.gen != 5)
 		return 0;
 
 	spin_lock_irq(&mchdev_lock);
@@ -4529,7 +4529,7 @@ static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
 		{ 16000, 14875, },
 		{ 16125, 15000, },
 	};
-	if (dev_priv->info->is_mobile)
+	if (dev_priv->info.is_mobile)
 		return v_table[pxvid].vm;
 	else
 		return v_table[pxvid].vd;
@@ -4572,7 +4572,7 @@ static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
 
 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
 {
-	if (dev_priv->info->gen != 5)
+	if (dev_priv->info.gen != 5)
 		return;
 
 	spin_lock_irq(&mchdev_lock);
@@ -4623,7 +4623,7 @@ unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
 {
 	unsigned long val;
 
-	if (dev_priv->info->gen != 5)
+	if (dev_priv->info.gen != 5)
 		return 0;
 
 	spin_lock_irq(&mchdev_lock);
-- 
1.8.3.1

[PATCH 2/7] drm/i915: Move num_plane to the intel_device_info structure

[Damien Lespiau]

And rename it to num_planes to match num_pipes.

This limit lives with num_pipes really, and now that dev_priv->info is
writable we can put it there instead.

While at it, introduce a intel_device_info_runtime_init() where we'll be
able to gather the device info fields at run-time.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c      | 21 ++++++++++++++++++---
 drivers/gpu/drm/i915/i915_drv.h      |  5 ++---
 drivers/gpu/drm/i915/intel_display.c |  4 ++--
 3 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 63aae7b..cd22ec6 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1449,6 +1449,23 @@ static void i915_dump_device_info(struct drm_i915_private *dev_priv)
 #undef SEP_COMMA
 }
 
+/*
+ * Determine various intel_device_info fields at runtime.
+ *
+ * Use it when either:
+ *   - it's judged too laborious to fill n static structures with the limit
+ *     when a simple if statement does the job,
+ *   - run-time checks (eg read fuse/strap registers) are needed.
+ */
+static void intel_device_info_runtime_init(struct drm_device *dev)
+{
+	struct intel_device_info *info = INTEL_INFO(dev);
+
+	info->num_planes = 1;
+	if (IS_VALLEYVIEW(dev))
+		info->num_planes = 2;
+}
+
 /**
  * i915_driver_load - setup chip and create an initial config
  * @dev: DRM device
@@ -1629,9 +1646,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	if (!IS_I945G(dev) && !IS_I945GM(dev))
 		pci_enable_msi(dev->pdev);
 
-	dev_priv->num_plane = 1;
-	if (IS_VALLEYVIEW(dev))
-		dev_priv->num_plane = 2;
+	intel_device_info_runtime_init(dev);
 
 	if (INTEL_INFO(dev)->num_pipes) {
 		ret = drm_vblank_init(dev, INTEL_INFO(dev)->num_pipes);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 55ad44e..8a3e5cd 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -77,7 +77,7 @@ enum plane {
 };
 #define plane_name(p) ((p) + 'A')
 
-#define sprite_name(p, s) ((p) * dev_priv->num_plane + (s) + 'A')
+#define sprite_name(p, s) ((p) * INTEL_INFO(dev)->num_planes + (s) + 'A')
 
 enum port {
 	PORT_A = 0,
@@ -503,6 +503,7 @@ struct intel_uncore {
 struct intel_device_info {
 	u32 display_mmio_offset;
 	u8 num_pipes:3;
+	u8 num_planes:2;
 	u8 gen;
 	u8 ring_mask; /* Rings supported by the HW */
 	DEV_INFO_FOR_EACH_FLAG(DEFINE_FLAG, SEP_SEMICOLON);
@@ -1385,8 +1386,6 @@ typedef struct drm_i915_private {
 	u32 hpd_event_bits;
 	struct timer_list hotplug_reenable_timer;
 
-	int num_plane;
-
 	struct i915_fbc fbc;
 	struct intel_opregion opregion;
 	struct intel_vbt_data vbt;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8b50b5f..4d0b35a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1189,7 +1189,7 @@ static void assert_sprites_disabled(struct drm_i915_private *dev_priv,
 	u32 val;
 
 	if (IS_VALLEYVIEW(dev)) {
-		for (i = 0; i < dev_priv->num_plane; i++) {
+		for (i = 0; i < INTEL_INFO(dev)->num_planes; i++) {
 			reg = SPCNTR(pipe, i);
 			val = I915_READ(reg);
 			WARN((val & SP_ENABLE),
@@ -10853,7 +10853,7 @@ void intel_modeset_init(struct drm_device *dev)
 
 	for_each_pipe(i) {
 		intel_crtc_init(dev, i);
-		for (j = 0; j < dev_priv->num_plane; j++) {
+		for (j = 0; j < INTEL_INFO(dev)->num_planes; j++) {
 			ret = intel_plane_init(dev, i, j);
 			if (ret)
 				DRM_DEBUG_KMS("pipe %c sprite %c init failed: %d\n",
-- 
1.8.3.1

[PATCH 3/7] drm/i915: Consolidate FUSE_STRAP in one set of defines

[Damien Lespiau]

We had 2 set of defines for the same register, so make it one.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h      | 18 ++++++++----------
 drivers/gpu/drm/i915/intel_ddi.c     |  2 +-
 drivers/gpu/drm/i915/intel_display.c |  3 +--
 3 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7348755..5a0cd52 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4114,13 +4114,14 @@
 #define  ILK_ELPIN_409_SELECT	(1 << 25)
 #define  ILK_DPARB_GATE	(1<<22)
 #define  ILK_VSDPFD_FULL	(1<<21)
-#define ILK_DISPLAY_CHICKEN_FUSES	0x42014
-#define  ILK_INTERNAL_GRAPHICS_DISABLE	(1<<31)
-#define  ILK_INTERNAL_DISPLAY_DISABLE	(1<<30)
-#define  ILK_DISPLAY_DEBUG_DISABLE	(1<<29)
-#define  ILK_HDCP_DISABLE		(1<<25)
-#define  ILK_eDP_A_DISABLE		(1<<24)
-#define  ILK_DESKTOP			(1<<23)
+#define FUSE_STRAP			0x42014
+#define  ILK_INTERNAL_GRAPHICS_DISABLE	(1 << 31)
+#define  ILK_INTERNAL_DISPLAY_DISABLE	(1 << 30)
+#define  ILK_DISPLAY_DEBUG_DISABLE	(1 << 29)
+#define  ILK_HDCP_DISABLE		(1 << 25)
+#define  ILK_eDP_A_DISABLE		(1 << 24)
+#define  HSW_CDCLK_LIMIT		(1 << 24)
+#define  ILK_DESKTOP			(1 << 23)
 
 #define ILK_DSPCLK_GATE_D			0x42020
 #define   ILK_VRHUNIT_CLOCK_GATE_DISABLE	(1 << 28)
@@ -4172,9 +4173,6 @@
 #define HSW_SCRATCH1				0xb038
 #define  HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE	(1<<27)
 
-#define HSW_FUSE_STRAP		0x42014
-#define  HSW_CDCLK_LIMIT	(1 << 24)
-
 /* PCH */
 
 /* south display engine interrupt: IBX */
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index c8a5fb7..6800130 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1249,7 +1249,7 @@ int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)
 
 	if (lcpll & LCPLL_CD_SOURCE_FCLK) {
 		return 800000;
-	} else if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT) {
+	} else if (I915_READ(FUSE_STRAP) & HSW_CDCLK_LIMIT) {
 		return 450000;
 	} else if (freq == LCPLL_CLK_FREQ_450) {
 		return 450000;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 4d0b35a..1577a7e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10216,8 +10216,7 @@ static bool has_edp_a(struct drm_device *dev)
 	if ((I915_READ(DP_A) & DP_DETECTED) == 0)
 		return false;
 
-	if (IS_GEN5(dev) &&
-	    (I915_READ(ILK_DISPLAY_CHICKEN_FUSES) & ILK_eDP_A_DISABLE))
+	if (IS_GEN5(dev) && (I915_READ(FUSE_STRAP) & ILK_eDP_A_DISABLE))
 		return false;
 
 	return true;
-- 
1.8.3.1

[PATCH 4/7] drm/i915: Disable display when fused off

[Damien Lespiau]

FUSE_STRAP has a bit to inform us that the display has been fused off.
Use it to setup the definitive number of pipes at run-time.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index cd22ec6..88bc0c2 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1456,14 +1456,31 @@ static void i915_dump_device_info(struct drm_i915_private *dev_priv)
  *   - it's judged too laborious to fill n static structures with the limit
  *     when a simple if statement does the job,
  *   - run-time checks (eg read fuse/strap registers) are needed.
+ *
+ * This function needs to be called after the MMIO has been setup as we are
+ * reading registers, and before the first usage of the fields it can tweak.
  */
 static void intel_device_info_runtime_init(struct drm_device *dev)
 {
-	struct intel_device_info *info = INTEL_INFO(dev);
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_device_info *info = &dev_priv->info;
+	u32 fuse_strap;
 
 	info->num_planes = 1;
 	if (IS_VALLEYVIEW(dev))
 		info->num_planes = 2;
+
+	/*
+	 * FUSE_STRAP exists since ILK, but we haven't seen a fused out display
+	 * before IVB.
+	 */
+	if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev)) {
+		fuse_strap = I915_READ(FUSE_STRAP);
+		if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE) {
+			DRM_DEBUG_DRIVER("Display fused off, disabling\n");
+			info->num_planes = 0;
+		}
+	}
 }
 
 /**
-- 
1.8.3.1

[PATCH 5/7] drm/i915: Support fused off pipe C configurations

[Damien Lespiau]

Starting from IVB, pipe C can be fused off. We have yet to see such
configuration in the wild though (ie not tested).

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c | 4 ++++
 drivers/gpu/drm/i915/i915_reg.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 88bc0c2..3af79e3 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1480,6 +1480,10 @@ static void intel_device_info_runtime_init(struct drm_device *dev)
 			DRM_DEBUG_DRIVER("Display fused off, disabling\n");
 			info->num_planes = 0;
 		}
+		if (fuse_strap & IVB_PIPE_C_DISABLE) {
+			DRM_DEBUG_DRIVER("Pipe C fused off, disabling\n");
+			info->num_planes = 2;
+		}
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5a0cd52..9e127b2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4118,6 +4118,7 @@
 #define  ILK_INTERNAL_GRAPHICS_DISABLE	(1 << 31)
 #define  ILK_INTERNAL_DISPLAY_DISABLE	(1 << 30)
 #define  ILK_DISPLAY_DEBUG_DISABLE	(1 << 29)
+#define  IVB_PIPE_C_DISABLE		(1 << 28)
 #define  ILK_HDCP_DISABLE		(1 << 25)
 #define  ILK_eDP_A_DISABLE		(1 << 24)
 #define  HSW_CDCLK_LIMIT		(1 << 24)
-- 
1.8.3.1

[PATCH 6/7] drm/i915: Remove the Quanta special case

[Damien Lespiau]

We now read out the FUSE_STRAP register, looking for configurations with
display fused off. Let's remove the Quanta special case and rely on the
programmed fuses to set num_pipes to 0.

This patch is untested.

Cc: Ben Widawsky <benjamin.widawsky@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 13 -------------
 include/drm/i915_pciids.h       |  9 ---------
 2 files changed, 22 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 65b5c83..b12b180 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -295,12 +295,6 @@ static const struct intel_device_info intel_ivybridge_m_info = {
 	.is_mobile = 1,
 };
 
-static const struct intel_device_info intel_ivybridge_q_info = {
-	GEN7_FEATURES,
-	.is_ivybridge = 1,
-	.num_pipes = 0, /* legal, last one wins */
-};
-
 static const struct intel_device_info intel_valleyview_m_info = {
 	GEN7_FEATURES,
 	.is_mobile = 1,
@@ -355,12 +349,6 @@ static const struct intel_device_info intel_broadwell_m_info = {
 	.has_ddi = 1,
 };
 
-/*
- * Make sure any device matches here are from most specific to most
- * general.  For example, since the Quanta match is based on the subsystem
- * and subvendor IDs, we need it to come before the more general IVB
- * PCI ID matches, otherwise we'll use the wrong info struct above.
- */
 #define INTEL_PCI_IDS \
 	INTEL_I830_IDS(&intel_i830_info),	\
 	INTEL_I845G_IDS(&intel_845g_info),	\
@@ -380,7 +368,6 @@ static const struct intel_device_info intel_broadwell_m_info = {
 	INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),	\
 	INTEL_SNB_D_IDS(&intel_sandybridge_d_info),	\
 	INTEL_SNB_M_IDS(&intel_sandybridge_m_info),	\
-	INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */ \
 	INTEL_IVB_M_IDS(&intel_ivybridge_m_info),	\
 	INTEL_IVB_D_IDS(&intel_ivybridge_d_info),	\
 	INTEL_HSW_D_IDS(&intel_haswell_d_info), \
diff --git a/include/drm/i915_pciids.h b/include/drm/i915_pciids.h
index 940ece4..02ebb67 100644
--- a/include/drm/i915_pciids.h
+++ b/include/drm/i915_pciids.h
@@ -41,12 +41,6 @@
 	0x030000, 0xff0000,			\
 	(unsigned long) info }
 
-#define INTEL_QUANTA_VGA_DEVICE(info) {		\
-	0x8086,	0x16a,				\
-	0x152d,	0x8990,				\
-	0x030000, 0xff0000,			\
-	(unsigned long) info }
-
 #define INTEL_I830_IDS(info)				\
 	INTEL_VGA_DEVICE(0x3577, info)
 
@@ -131,9 +125,6 @@
 	INTEL_VGA_DEVICE(0x015a, info), /* GT1 server */ \
 	INTEL_VGA_DEVICE(0x016a, info)  /* GT2 server */
 
-#define INTEL_IVB_Q_IDS(info) \
-	INTEL_QUANTA_VGA_DEVICE(info) /* Quanta transcode */
-
 #define INTEL_HSW_D_IDS(info) \
 	INTEL_VGA_DEVICE(0x0402, info), /* GT1 desktop */ \
 	INTEL_VGA_DEVICE(0x0412, info), /* GT2 desktop */ \
-- 
1.8.3.1

[PATCH 7/7] drm/i915: Use I915_MAX_PIPES in the pipe/plane_to_crtc_mapping definitions

[Damien Lespiau]

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 8a3e5cd..85d126e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1436,8 +1436,8 @@ typedef struct drm_i915_private {
 
 	struct sdvo_device_mapping sdvo_mappings[2];
 
-	struct drm_crtc *plane_to_crtc_mapping[3];
-	struct drm_crtc *pipe_to_crtc_mapping[3];
+	struct drm_crtc *plane_to_crtc_mapping[I915_MAX_PIPES];
+	struct drm_crtc *pipe_to_crtc_mapping[I915_MAX_PIPES];
 	wait_queue_head_t pending_flip_queue;
 
 #ifdef CONFIG_DEBUG_FS
-- 
1.8.3.1

Re: Supporting fused display configurations

[Damien Lespiau]

On Thu, Dec 05, 2013 at 01:56:15PM +0000, Damien Lespiau wrote:
> A while ago, Ben added support for Quanta devices that had the display hardware
> fused off. We can a bit more general than that by reading the FUSE_STRAP
> register and setting num_pipes to 0 when detecting such condition.

I'm an idiot and relied on auto-completion that completed num_ to
num_planes instead of num_pipes... v2 to follow...

-- 
Damien

Re: Supporting fused display configurations

[Chris Wilson]

On Thu, Dec 05, 2013 at 01:56:15PM +0000, Damien Lespiau wrote:
> A while ago, Ben added support for Quanta devices that had the display hardware
> fused off. We can a bit more general than that by reading the FUSE_STRAP
> register and setting num_pipes to 0 when detecting such condition.
> 
> To achieve that, the intel_device_info structure in dev_priv needed to be made
> writable, that's patch 1.
> 
> Patches 2 to 5 build the support for reading out FUSE_STRAP on IVB+, client
> platforms only to detect both "display fused off" and "pipe C fused off"
> configurations.
> 
> Patch 6 removes the Quanta special-case with the (reasonable) hope that it's
> now covered by the DISPLAY_DISABLE bit.
> 
> Patch 7 is a bonus, somewhat unrelated, little clean-up patch.
> 
> This series is not tested due to lack of such a device, I was hoping Ben still
> had the device around somewhere and could give this series a go.

Patches look fine. Just relying on fuse registers being correct is like
relying on vbt being correct, fraught with anxiety.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre

[PATCH 4/7 v2] drm/i915: Disable display when fused off

[Damien Lespiau]

FUSE_STRAP has a bit to inform us that the display has been fused off.
Use it to setup the definitive number of pipes at run-time.

v2: actually tweak num_pipes, not num_planes

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index cd22ec6..3e9828c 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1456,14 +1456,31 @@ static void i915_dump_device_info(struct drm_i915_private *dev_priv)
  *   - it's judged too laborious to fill n static structures with the limit
  *     when a simple if statement does the job,
  *   - run-time checks (eg read fuse/strap registers) are needed.
+ *
+ * This function needs to be called after the MMIO has been setup as we are
+ * reading registers, and before the first usage of the fields it can tweak.
  */
 static void intel_device_info_runtime_init(struct drm_device *dev)
 {
-	struct intel_device_info *info = INTEL_INFO(dev);
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_device_info *info = &dev_priv->info;
+	u32 fuse_strap;
 
 	info->num_planes = 1;
 	if (IS_VALLEYVIEW(dev))
 		info->num_planes = 2;
+
+	/*
+	 * FUSE_STRAP exists since ILK, but we haven't seen a fused out display
+	 * before IVB.
+	 */
+	if (INTEL_INFO(dev)->gen >= 7 && !IS_VALLEYVIEW(dev)) {
+		fuse_strap = I915_READ(FUSE_STRAP);
+		if (fuse_strap & ILK_INTERNAL_DISPLAY_DISABLE) {
+			DRM_DEBUG_DRIVER("Display fused off, disabling\n");
+			info->num_pipes = 0;
+		}
+	}
 }
 
 /**
-- 
1.8.3.1

[PATCH 5/7 v2] drm/i915: Support fused off pipe C configurations

[Damien Lespiau]

Starting from IVB, pipe C can be fused off. We have yet to see such
configuration in the wild though (ie not tested).

v2: Actually tweak num_pipes, not num_planes.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 drivers/gpu/drm/i915/i915_dma.c | 4 ++++
 drivers/gpu/drm/i915/i915_reg.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 3e9828c..6d39f94 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1480,6 +1480,10 @@ static void intel_device_info_runtime_init(struct drm_device *dev)
 			DRM_DEBUG_DRIVER("Display fused off, disabling\n");
 			info->num_pipes = 0;
 		}
+		if (fuse_strap & IVB_PIPE_C_DISABLE) {
+			DRM_DEBUG_DRIVER("Pipe C fused off, disabling\n");
+			info->num_pipes = 2;
+		}
 	}
 }
 
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5a0cd52..9e127b2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4118,6 +4118,7 @@
 #define  ILK_INTERNAL_GRAPHICS_DISABLE	(1 << 31)
 #define  ILK_INTERNAL_DISPLAY_DISABLE	(1 << 30)
 #define  ILK_DISPLAY_DEBUG_DISABLE	(1 << 29)
+#define  IVB_PIPE_C_DISABLE		(1 << 28)
 #define  ILK_HDCP_DISABLE		(1 << 25)
 #define  ILK_eDP_A_DISABLE		(1 << 24)
 #define  HSW_CDCLK_LIMIT		(1 << 24)
-- 
1.8.3.1

Re: Supporting fused display configurations

[Damien Lespiau]

On Thu, Dec 05, 2013 at 02:09:33PM +0000, Chris Wilson wrote:
> Patches look fine. Just relying on fuse registers being correct is like
> relying on vbt being correct, fraught with anxiety.

Well, I believe those bits are directly reflecting the fuses/straps
programmed (the sames that will actually disable hw), so it should be
better than VBT. On the other hand, that's the reason why I only check
from IVB on and not from ILK to not take unecessary risks on platforms
with no known fused config.

In any case, if someone with such a device could test the series :)

-- 
Damien

Re: Supporting fused display configurations

[Ben Widawsky]

On Thu, Dec 05, 2013 at 02:21:08PM +0000, Damien Lespiau wrote:
> On Thu, Dec 05, 2013 at 02:09:33PM +0000, Chris Wilson wrote:
> > Patches look fine. Just relying on fuse registers being correct is like
> > relying on vbt being correct, fraught with anxiety.
> 
> Well, I believe those bits are directly reflecting the fuses/straps
> programmed (the sames that will actually disable hw), so it should be
> better than VBT. On the other hand, that's the reason why I only check
> from IVB on and not from ILK to not take unecessary risks on platforms
> with no known fused config.

I'm surprised by this. We had a semi-lengthy mail on the matter
internally, and ISTR there was no way to actually make this work for all
cases. I guess I need to go re-read that.

> 
> In any case, if someone with such a device could test the series :)

IMHO the patches can't be merged until it can be verified. If you want
to call that a nak-until-then on patch 6, do. I'd much rather have a
dynamic solution like this though.

> 
> -- 
> Damien

-- 
Ben Widawsky, Intel Open Source Technology Center

Re: Supporting fused display configurations

[Damien Lespiau]

On Thu, Dec 05, 2013 at 10:19:20AM -0800, Ben Widawsky wrote:
> On Thu, Dec 05, 2013 at 02:21:08PM +0000, Damien Lespiau wrote:
> > On Thu, Dec 05, 2013 at 02:09:33PM +0000, Chris Wilson wrote:
> > > Patches look fine. Just relying on fuse registers being correct is like
> > > relying on vbt being correct, fraught with anxiety.
> > 
> > Well, I believe those bits are directly reflecting the fuses/straps
> > programmed (the sames that will actually disable hw), so it should be
> > better than VBT. On the other hand, that's the reason why I only check
> > from IVB on and not from ILK to not take unecessary risks on platforms
> > with no known fused config.
> 
> I'm surprised by this. We had a semi-lengthy mail on the matter
> internally, and ISTR there was no way to actually make this work for all
> cases. I guess I need to go re-read that.

Oh? I must have missed it or it wasn't broadcasted. Mind digging out the
thread again?

> > In any case, if someone with such a device could test the series :)
> 
> IMHO the patches can't be merged until it can be verified. If you want
> to call that a nak-until-then on patch 6, do. I'd much rather have a
> dynamic solution like this though.

Yes, of course! (I'd like to have the writable info in any case).

-- 
Damien