From mboxrd@z Thu Jan  1 00:00:00 1970
From: Archit Taneja <architt@codeaurora.org>
Subject: Re: [PATCH v6 03/11] drm/hisilicon: Add crtc driver for ADE
Date: Tue, 1 Mar 2016 00:18:02 +0530
Message-ID: <56D49262.5030106@codeaurora.org>
References: <1456476028-36880-1-git-send-email-xinliang.liu@linaro.org>
 <1456476028-36880-4-git-send-email-xinliang.liu@linaro.org>
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To: Xinliang Liu <xinliang.liu@linaro.org>, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, daniel@ffwll.ch, robh@kernel.org, daniel@fooishbar.org, airlied@linux.ie, corbet@lwn.net, catalin.marinas@arm.com, will.deacon@arm.com, emil.l.velikov@gmail.com, mark.rutland@arm.com
Cc: linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxarm@huawei.com, andy.green@linaro.org, haojian.zhuang@linaro.org, liguozhu@hisilicon.com, xuwei5@hisilicon.com, w.f@huawei.com, puck.chen@hisilicon.com, bintian.wang@huawei.com, benjamin.gaignard@linaro.org, xuyiping@hisilicon.com, kong.kongxinwei@hisilicon.com, zourongrong@huawei.com, lijianhua@huawei.com, sumit.semwal@linaro.org, guodong.xu@linaro.org
List-Id: dri-devel@lists.freedesktop.org



On 2/26/2016 2:10 PM, Xinliang Liu wrote:
> Add crtc funcs and helper funcs for ADE.
>
> v6:
> - Cleanup reg-names dt parsing.
> v5:
> - Use syscon to access ADE media NOC QoS registers instread of directly
>    writing registers.
> - Use reset controller to reset ADE instead of directly writing registers.
> v4: None.
> v3:
> - Make ade as the master driver.
> - Use port to connect with encoder.
> - A few cleanup.
> v2:
> - Remove abtraction layer.
>
> Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
> ---
>   drivers/gpu/drm/hisilicon/kirin/Makefile        |   3 +-
>   drivers/gpu/drm/hisilicon/kirin/kirin_ade_reg.h | 290 +++++++++++++++
>   drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 452 ++++++++++++++++++++++++
>   drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c |  15 +
>   drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h |   8 +
>   5 files changed, 767 insertions(+), 1 deletion(-)
>   create mode 100644 drivers/gpu/drm/hisilicon/kirin/kirin_ade_reg.h
>   create mode 100644 drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
>
> diff --git a/drivers/gpu/drm/hisilicon/kirin/Makefile b/drivers/gpu/drm/hisilicon/kirin/Makefile
> index cb346de47d48..2a61ab006ddb 100644
> --- a/drivers/gpu/drm/hisilicon/kirin/Makefile
> +++ b/drivers/gpu/drm/hisilicon/kirin/Makefile
> @@ -1,3 +1,4 @@
> -kirin-drm-y := kirin_drm_drv.o
> +kirin-drm-y := kirin_drm_drv.o \
> +	       kirin_drm_ade.o
>
>   obj-$(CONFIG_DRM_HISI_KIRIN) += kirin-drm.o
> diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_ade_reg.h b/drivers/gpu/drm/hisilicon/kirin/kirin_ade_reg.h
> new file mode 100644
> index 000000000000..eb444b899c7b
> --- /dev/null
> +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_ade_reg.h
> @@ -0,0 +1,290 @@
> +/*
> + * Copyright (c) 2016 Linaro Limited.
> + * Copyright (c) 2014-2016 Hisilicon Limited.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + */
> +
> +#ifndef __KIRIN_ADE_REG_H__
> +#define __KIRIN_ADE_REG_H__
> +
> +/*
> + * ADE Registers
> + */
> +#define MASK(x)				(BIT(x) - 1)
> +
> +#define ADE_CTRL			0x0004
> +#define FRM_END_START_OFST		0
> +#define FRM_END_START_MASK		MASK(2)
> +#define ADE_CTRL1			0x008C
> +#define AUTO_CLK_GATE_EN_OFST		0
> +#define AUTO_CLK_GATE_EN		BIT(0)
> +#define ADE_ROT_SRC_CFG			0x0010
> +#define ADE_DISP_SRC_CFG		0x0018
> +#define ADE_WDMA2_SRC_CFG		0x001C
> +#define ADE_SEC_OVLY_SRC_CFG		0x0020
> +#define ADE_WDMA3_SRC_CFG		0x0024
> +#define ADE_OVLY1_TRANS_CFG		0x002C
> +#define ADE_EN				0x0100
> +#define ADE_DISABLE			0
> +#define ADE_ENABLE			1
> +#define INTR_MASK_CPU(x)		(0x0C10 + (x) * 0x4)
> +#define ADE_FRM_DISGARD_CTRL		0x00A4
> +/* reset and reload regs */
> +#define ADE_SOFT_RST_SEL(x)		(0x0078 + (x) * 0x4)
> +#define ADE_RELOAD_DIS(x)		(0x00AC + (x) * 0x4)
> +#define RDMA_OFST			0
> +#define CLIP_OFST			15
> +#define SCL_OFST			21
> +#define CTRAN_OFST			24
> +#define OVLY_OFST			37 /* 32+5 */
> +/* channel regs */
> +#define RD_CH_PE(x)			(0x1000 + (x) * 0x80)
> +#define RD_CH_CTRL(x)			(0x1004 + (x) * 0x80)
> +#define RD_CH_ADDR(x)			(0x1008 + (x) * 0x80)
> +#define RD_CH_SIZE(x)			(0x100C + (x) * 0x80)
> +#define RD_CH_STRIDE(x)			(0x1010 + (x) * 0x80)
> +#define RD_CH_SPACE(x)			(0x1014 + (x) * 0x80)
> +#define RD_CH_PARTIAL_SIZE(x)		(0x1018 + (x) * 0x80)
> +#define RD_CH_PARTIAL_SPACE(x)		(0x101C + (x) * 0x80)
> +#define RD_CH_EN(x)			(0x1020 + (x) * 0x80)
> +#define RD_CH_STATUS(x)			(0x1024 + (x) * 0x80)
> +#define RD_CH_DISP_CTRL			0x1404
> +#define RD_CH_DISP_ADDR			0x1408
> +#define RD_CH_DISP_SIZE			0x140C
> +#define RD_CH_DISP_STRIDE		0x1410
> +#define RD_CH_DISP_SPACE		0x1414
> +#define RD_CH_DISP_EN			0x142C
> +/* clip regs */
> +#define ADE_CLIP_DISABLE(x)		(0x6800 + (x) * 0x100)
> +#define ADE_CLIP_SIZE0(x)		(0x6804 + (x) * 0x100)
> +#define ADE_CLIP_SIZE1(x)		(0x6808 + (x) * 0x100)
> +#define ADE_CLIP_SIZE2(x)		(0x680C + (x) * 0x100)
> +#define ADE_CLIP_CFG_OK(x)		(0x6810 + (x) * 0x100)
> +/* scale regs */
> +#define ADE_SCL1_MUX_CFG		0x000C
> +#define ADE_SCL2_SRC_CFG		0x0014
> +#define ADE_SCL3_MUX_CFG		0x0008
> +#define ADE_SCL_CTRL(x)			(0x3000 + (x) * 0x800)
> +#define ADE_SCL_HSP(x)			(0x3004 + (x) * 0x800)
> +#define ADE_SCL_UV_HSP(x)		(0x3008 + (x) * 0x800)
> +#define ADE_SCL_VSP(x)			(0x300C + (x) * 0x800)
> +#define ADE_SCL_UV_VSP(x)		(0x3010 + (x) * 0x800)
> +#define ADE_SCL_ORES(x)			(0x3014 + (x) * 0x800)
> +#define ADE_SCL_IRES(x)			(0x3018 + (x) * 0x800)
> +#define ADE_SCL_START(x)		(0x301C + (x) * 0x800)
> +#define ADE_SCL_ERR(x)			(0x3020 + (x) * 0x800)
> +#define ADE_SCL_PIX_OFST(x)		(0x3024 + (x) * 0x800)
> +#define ADE_SCL_UV_PIX_OFST(x)		(0x3028 + (x) * 0x800)
> +#define ADE_SCL_COEF_CLR(x)		(0x3030 + (x) * 0x800)
> +#define ADE_SCL_HCOEF(x, m, n)		(0x3100 + (x) * 0x800 + \
> +					12 * (m) + 4 * (n))
> +#define ADE_SCL_VCOEF(x, i, j)		(0x340C + (x) * 0x800 + \
> +					12 * (i) + 4 * (j))
> +/* ctran regs */
> +#define ADE_CTRAN5_TRANS_CFG		0x0040
> +#define ADE_CTRAN_DIS(x)		(0x5004 + (x) * 0x100)
> +#define CTRAN_BYPASS_ON			1
> +#define CTRAN_BYPASS_OFF		0
> +#define ADE_CTRAN_MODE_CHOOSE(x)	(0x5008 + (x) * 0x100)
> +#define ADE_CTRAN_STAT(x)		(0x500C + (x) * 0x100)
> +#define ADE_CTRAN_CHDC0(x)		(0x5010 + (x) * 0x100)
> +#define ADE_CTRAN_CHDC1(x)		(0x5014 + (x) * 0x100)
> +#define ADE_CTRAN_CHDC2(x)		(0x5018 + (x) * 0x100)
> +#define ADE_CTRAN_CHDC3(x)		(0x501C + (x) * 0x100)
> +#define ADE_CTRAN_CHDC4(x)		(0x5020 + (x) * 0x100)
> +#define ADE_CTRAN_CHDC5(x)		(0x5024 + (x) * 0x100)
> +#define ADE_CTRAN_CSC0(x)		(0x5028 + (x) * 0x100)
> +#define ADE_CTRAN_CSC1(x)		(0x502C + (x) * 0x100)
> +#define ADE_CTRAN_CSC2(x)		(0x5030 + (x) * 0x100)
> +#define ADE_CTRAN_CSC3(x)		(0x5034 + (x) * 0x100)
> +#define ADE_CTRAN_CSC4(x)		(0x5038 + (x) * 0x100)
> +#define ADE_CTRAN_IMAGE_SIZE(x)		(0x503C + (x) * 0x100)
> +#define ADE_CTRAN_CFG_OK(x)		(0x5040 + (x) * 0x100)
> +/* overlay regs */
> +#define ADE_OVLY_ALPHA_ST		0x2000
> +#define ADE_OVLY_CH_XY0(x)		(0x2004 + (x) * 4)
> +#define ADE_OVLY_CH_XY1(x)		(0x2024 + (x) * 4)
> +#define ADE_OVLY_CH_CTL(x)		(0x204C + (x) * 4)
> +#define ADE_OVLY_OUTPUT_SIZE(x)		(0x2070 + (x) * 8)
> +#define OUTPUT_XSIZE_OFST		16
> +#define ADE_OVLY_BASE_COLOR(x)		(0x2074 + (x) * 8)
> +#define ADE_OVLYX_CTL(x)		(0x209C + (x) * 4)
> +#define ADE_OVLY_CTL			0x0098
> +#define CH_OVLY_SEL_OFST(x)		((x) * 4)
> +#define CH_OVLY_SEL_MASK		MASK(2)
> +#define CH_OVLY_SEL_VAL(x)		((x) + 1)
> +#define CH_ALP_MODE_OFST		0
> +#define CH_ALP_SEL_OFST			2
> +#define CH_UNDER_ALP_SEL_OFST		4
> +#define CH_EN_OFST			6
> +#define CH_ALP_GBL_OFST			15
> +#define CH_SEL_OFST			28
> +
> +/*
> + * LDI Registers
> + */
> +#define LDI_HRZ_CTRL0			0x7400
> +#define HBP_OFST			20
> +#define LDI_HRZ_CTRL1			0x7404
> +#define LDI_VRT_CTRL0			0x7408
> +#define VBP_OFST			20
> +#define LDI_VRT_CTRL1			0x740C
> +#define LDI_PLR_CTRL			0x7410
> +#define FLAG_NVSYNC			BIT(0)
> +#define FLAG_NHSYNC			BIT(1)
> +#define FLAG_NPIXCLK			BIT(2)
> +#define FLAG_NDE			BIT(3)
> +#define LDI_DSP_SIZE			0x7414
> +#define VSIZE_OFST			20
> +#define LDI_INT_EN			0x741C
> +#define FRAME_END_INT_EN_OFST		1
> +#define LDI_CTRL			0x7420
> +#define BPP_OFST			3
> +#define DATA_GATE_EN			BIT(2)
> +#define LDI_EN				BIT(0)
> +#define LDI_ORG_INT			0x7424
> +#define LDI_MSK_INT			0x7428
> +#define LDI_INT_CLR			0x742C
> +#define LDI_WORK_MODE			0x7430
> +#define LDI_DE_SPACE_LOW		0x7438
> +#define LDI_MCU_INTS			0x7450
> +#define LDI_MCU_INTE			0x7454
> +#define LDI_MCU_INTC			0x7458
> +#define LDI_HDMI_DSI_GT			0x7434

Maybe place this one after LDI_WORK_MODE to maintain
the increasing order?

> +
> +/*
> + * ADE media bus service regs
> + */
> +#define ADE0_QOSGENERATOR_MODE		0x010C
> +#define QOSGENERATOR_MODE_MASK		MASK(2)
> +#define ADE0_QOSGENERATOR_EXTCONTROL	0x0118
> +#define SOCKET_QOS_EN			BIT(0)
> +#define ADE1_QOSGENERATOR_MODE		0x020C
> +#define ADE1_QOSGENERATOR_EXTCONTROL	0x0218
> +
> +/*
> + * ADE regs relevant enums
> + */
> +enum frame_end_start {
> +	/* regs take effective in every vsync */

s/effective/effect

> +	REG_EFFECTIVE_IN_VSYNC = 0,
> +	/* regs take effective in fist ade en and every frame end */
> +	REG_EFFECTIVE_IN_ADEEN_FRMEND,
> +	/* regs take effective in ade en immediately */
> +	REG_EFFECTIVE_IN_ADEEN,
> +	/* regs take effective in first vsync and every frame end */
> +	REG_EFFECTIVE_IN_VSYNC_FRMEND
> +};
> +
> +enum ade_fb_format {
> +	ADE_RGB_565 = 0,
> +	ADE_BGR_565,
> +	ADE_XRGB_8888,
> +	ADE_XBGR_8888,
> +	ADE_ARGB_8888,
> +	ADE_ABGR_8888,
> +	ADE_RGBA_8888,
> +	ADE_BGRA_8888,
> +	ADE_RGB_888,
> +	ADE_BGR_888 = 9,
> +	ADE_FORMAT_NOT_SUPPORT = 800

ADE_FORMAT_UNSUPPORTED would be better here.

> +};
> +
> +enum ade_channel {
> +	ADE_CH1 = 0,	/* channel 1 for primary plane */
> +	ADE_CH_NUM
> +};
> +
> +enum ade_scale {
> +	ADE_SCL1 = 0,
> +	ADE_SCL2,
> +	ADE_SCL3,
> +	ADE_SCL_NUM
> +};
> +
> +enum ade_ctran {
> +	ADE_CTRAN1 = 0,
> +	ADE_CTRAN2,
> +	ADE_CTRAN3,
> +	ADE_CTRAN4,
> +	ADE_CTRAN5,
> +	ADE_CTRAN6,
> +	ADE_CTRAN_NUM
> +};
> +
> +enum ade_overlay {
> +	ADE_OVLY1 = 0,
> +	ADE_OVLY2,
> +	ADE_OVLY3,
> +	ADE_OVLY_NUM
> +};
> +
> +enum ade_alpha_mode {
> +	ADE_ALP_GLOBAL = 0,
> +	ADE_ALP_PIXEL,
> +	ADE_ALP_PIXEL_AND_GLB
> +};
> +
> +enum ade_alpha_blending_mode {
> +	ADE_ALP_MUL_COEFF_0 = 0,	/* alpha */
> +	ADE_ALP_MUL_COEFF_1,		/* 1-alpha */
> +	ADE_ALP_MUL_COEFF_2,		/* 0 */
> +	ADE_ALP_MUL_COEFF_3		/* 1 */
> +};
> +
> +/*
> + * LDI regs relevant enums
> + */
> +enum dsi_pclk_en {
> +	DSI_PCLK_ON = 0,
> +	DSI_PCLK_OFF
> +};
> +
> +enum ldi_output_format {
> +	LDI_OUT_RGB_565 = 0,
> +	LDI_OUT_RGB_666,
> +	LDI_OUT_RGB_888
> +};
> +
> +enum ldi_work_mode {
> +	TEST_MODE = 0,
> +	NORMAL_MODE
> +};
> +
> +enum ldi_input_source {
> +	DISP_SRC_NONE = 0,
> +	DISP_SRC_OVLY2,
> +	DISP_SRC_DISP,
> +	DISP_SRC_ROT,
> +	DISP_SRC_SCL2
> +};
> +
> +/*
> + * ADE media bus service relevant enums
> + */
> +enum qos_generator_mode {
> +	FIXED_MODE = 0,
> +	LIMITER_MODE,
> +	BYPASS_MODE,
> +	REGULATOR_MODE
> +};
> +
> +/*
> + * Register Write/Read Helper functions
> + */
> +static inline void ade_update_bits(void __iomem *addr, u32 bit_start,
> +				   u32 mask, u32 val)
> +{
> +	u32 tmp, orig;
> +
> +	orig = readl(addr);
> +	tmp = orig & ~(mask << bit_start);
> +	tmp |= (val & mask) << bit_start;
> +	writel(tmp, addr);
> +}
> +
> +#endif
> diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
> new file mode 100644
> index 000000000000..bb93616dcf3d
> --- /dev/null
> +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
> @@ -0,0 +1,452 @@
> +/*
> + * Hisilicon Hi6220 SoC ADE(Advanced Display Engine)'s crtc&plane driver
> + *
> + * Copyright (c) 2016 Linaro Limited.
> + * Copyright (c) 2014-2016 Hisilicon Limited.
> + *
> + * Author:
> + *	Xinliang Liu <z.liuxinliang@hisilicon.com>
> + *	Xinliang Liu <xinliang.liu@linaro.org>
> + *	Xinwei Kong <kong.kongxinwei@hisilicon.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + */
> +
> +#include <linux/bitops.h>
> +#include <linux/clk.h>
> +#include <video/display_timing.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
> +#include <linux/reset.h>
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_crtc.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_helper.h>
> +
> +#include "kirin_drm_drv.h"
> +#include "kirin_ade_reg.h"
> +
> +#define to_ade_crtc(crtc) \
> +	container_of(crtc, struct ade_crtc, base)
> +
> +struct ade_hw_ctx {
> +	void __iomem  *base;
> +	struct regmap *noc_regmap;
> +	struct clk *ade_core_clk;
> +	struct clk *media_noc_clk;
> +	struct clk *ade_pix_clk;
> +	struct reset_control *reset;
> +	bool power_on;
> +	int irq;
> +};
> +
> +struct ade_crtc {
> +	struct drm_crtc base;
> +	struct ade_hw_ctx *ctx;
> +	bool enable;
> +	u32 out_format;
> +};
> +
> +struct ade_data {
> +	struct ade_crtc acrtc;
> +	struct ade_hw_ctx ctx;
> +};
> +
> +static void ade_update_reload_bit(void __iomem *base, u32 bit_num, u32 val)
> +{
> +	u32 bit_ofst, reg_num;
> +
> +	bit_ofst = bit_num % 32;
> +	reg_num = bit_num / 32;
> +
> +	ade_update_bits(base + ADE_RELOAD_DIS(reg_num), bit_ofst,
> +			MASK(1), !!val);
> +}
> +
> +static u32 ade_read_reload_bit(void __iomem *base, u32 bit_num)
> +{
> +	u32 tmp, bit_ofst, reg_num;
> +
> +	bit_ofst = bit_num % 32;
> +	reg_num = bit_num / 32;
> +
> +	tmp = readl(base + ADE_RELOAD_DIS(reg_num));
> +	return !!(BIT(bit_ofst) & tmp);
> +}
> +
> +static void ade_init(struct ade_hw_ctx *ctx)
> +{
> +	void __iomem *base = ctx->base;
> +
> +	/* enable clk gate */
> +	ade_update_bits(base + ADE_CTRL1, AUTO_CLK_GATE_EN_OFST,
> +			AUTO_CLK_GATE_EN, ADE_ENABLE);
> +	/* clear overlay */
> +	writel(0, base + ADE_OVLY1_TRANS_CFG);
> +	writel(0, base + ADE_OVLY_CTL);
> +	writel(0, base + ADE_OVLYX_CTL(ADE_OVLY2));
> +	/* clear reset and reload regs */
> +	writel(MASK(32), base + ADE_SOFT_RST_SEL(0));
> +	writel(MASK(32), base + ADE_SOFT_RST_SEL(1));
> +	writel(MASK(32), base + ADE_RELOAD_DIS(0));
> +	writel(MASK(32), base + ADE_RELOAD_DIS(1));
> +	/* for video mode, that ade registers
> +	 * became effective at frame end

s/became/become

Consider re-writing this comment

> +	 */
> +	ade_update_bits(base + ADE_CTRL, FRM_END_START_OFST,
> +			FRM_END_START_MASK, REG_EFFECTIVE_IN_ADEEN_FRMEND);
> +}
> +
> +static void ade_ldi_set_mode(struct ade_crtc *acrtc,
> +			     struct drm_display_mode *mode,
> +			     struct drm_display_mode *adj_mode)
> +{
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +	void __iomem *base = ctx->base;
> +	u32 width = mode->hdisplay;
> +	u32 height = mode->vdisplay;
> +	u32 hfp, hbp, hsw, vfp, vbp, vsw;
> +	u32 plr_flags;
> +	int ret;
> +
> +	plr_flags = (mode->flags & DRM_MODE_FLAG_NVSYNC) ? FLAG_NVSYNC : 0;
> +	plr_flags |= (mode->flags & DRM_MODE_FLAG_NHSYNC) ? FLAG_NHSYNC : 0;
> +	hfp = mode->hsync_start - mode->hdisplay;
> +	hbp = mode->htotal - mode->hsync_end;
> +	hsw = mode->hsync_end - mode->hsync_start;
> +	vfp = mode->vsync_start - mode->vdisplay;
> +	vbp = mode->vtotal - mode->vsync_end;
> +	vsw = mode->vsync_end - mode->vsync_start;
> +	if (vsw > 15) {
> +		DRM_DEBUG_DRIVER("vsw exceeded 15\n");
> +		vsw = 15;
> +	}
> +
> +	writel((hbp << HBP_OFST) | hfp, base + LDI_HRZ_CTRL0);
> +	 /* the configured value is actual value - 1 */
> +	writel(hsw - 1, base + LDI_HRZ_CTRL1);
> +	writel((vbp << VBP_OFST) | vfp, base + LDI_VRT_CTRL0);
> +	 /* the configured value is actual value - 1 */
> +	writel(vsw - 1, base + LDI_VRT_CTRL1);
> +	 /* the configured value is actual value - 1 */
> +	writel(((height - 1) << VSIZE_OFST) | (width - 1),
> +	       base + LDI_DSP_SIZE);
> +	writel(plr_flags, base + LDI_PLR_CTRL);
> +
> +	/* Success should be guaranteed in mode_valid call back,
> +	 * so failer shouldn't happen here

s/failer/failure

Also, please use the standard way of writing multiple lines of
comments here and elsewhere in the driver.


> +	 */
> +	ret = clk_set_rate(ctx->ade_pix_clk, mode->clock * 1000);
> +	if (ret)
> +		DRM_ERROR("failed to set pixel clk %dHz (%d)\n",
> +			  mode->clock * 1000, ret);
> +	adj_mode->clock = clk_get_rate(ctx->ade_pix_clk) / 1000;
> +
> +	/* ctran6 setting */
> +	writel(CTRAN_BYPASS_ON, base + ADE_CTRAN_DIS(ADE_CTRAN6));
> +	 /* the configured value is actual value - 1 */
> +	writel(width * height - 1, base + ADE_CTRAN_IMAGE_SIZE(ADE_CTRAN6));
> +	ade_update_reload_bit(base, CTRAN_OFST + ADE_CTRAN6, 0);
> +
> +	DRM_DEBUG_DRIVER("set mode: %dx%d\n", width, height);
> +}
> +
> +static int ade_power_up(struct ade_hw_ctx *ctx)
> +{
> +	int ret;
> +
> +	ret = clk_prepare_enable(ctx->media_noc_clk);
> +	if (ret) {
> +		DRM_ERROR("failed to enable media_noc_clk (%d)\n", ret);
> +		return ret;
> +	}
> +
> +	ret = reset_control_deassert(ctx->reset);
> +	if (ret) {
> +		DRM_ERROR("failed to deassert reset\n");
> +		return ret;
> +	}
> +
> +	ret = clk_prepare_enable(ctx->ade_core_clk);
> +	if (ret) {
> +		DRM_ERROR("failed to enable ade_core_clk (%d)\n", ret);
> +		return ret;
> +	}
> +
> +	ade_init(ctx);
> +	ctx->power_on = true;
> +	return 0;
> +}
> +
> +static void ade_power_down(struct ade_hw_ctx *ctx)
> +{
> +	void __iomem *base = ctx->base;
> +
> +	writel(ADE_DISABLE, base + LDI_CTRL);
> +	/* dsi pixel off */
> +	writel(DSI_PCLK_OFF, base + LDI_HDMI_DSI_GT);
> +
> +	clk_disable_unprepare(ctx->ade_core_clk);
> +	reset_control_assert(ctx->reset);
> +	clk_disable_unprepare(ctx->media_noc_clk);
> +	ctx->power_on = false;
> +}
> +
> +static void ade_set_medianoc_qos(struct ade_crtc *acrtc)
> +{
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +	struct regmap *map = ctx->noc_regmap;
> +
> +	regmap_update_bits(map, ADE0_QOSGENERATOR_MODE,
> +			   QOSGENERATOR_MODE_MASK, BYPASS_MODE);
> +	regmap_update_bits(map, ADE0_QOSGENERATOR_EXTCONTROL,
> +			   SOCKET_QOS_EN, SOCKET_QOS_EN);
> +
> +	regmap_update_bits(map, ADE1_QOSGENERATOR_MODE,
> +			   QOSGENERATOR_MODE_MASK, BYPASS_MODE);
> +	regmap_update_bits(map, ADE1_QOSGENERATOR_EXTCONTROL,
> +			   SOCKET_QOS_EN, SOCKET_QOS_EN);
> +}
> +
> +static void ade_display_enable(struct ade_crtc *acrtc)
> +{
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +	void __iomem *base = ctx->base;
> +	u32 out_fmt = acrtc->out_format;
> +
> +	/* display source setting */
> +	writel(DISP_SRC_OVLY2, base + ADE_DISP_SRC_CFG);
> +
> +	/* enable ade */
> +	writel(ADE_ENABLE, base + ADE_EN);
> +	/* enable ldi */
> +	writel(NORMAL_MODE, base + LDI_WORK_MODE);
> +	writel((out_fmt << BPP_OFST) | DATA_GATE_EN | LDI_EN,
> +	       base + LDI_CTRL);
> +	/* dsi pixel on */
> +	writel(DSI_PCLK_ON, base + LDI_HDMI_DSI_GT);
> +}
> +
> +static void ade_crtc_enable(struct drm_crtc *crtc)
> +{
> +	struct ade_crtc *acrtc = to_ade_crtc(crtc);
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +	int ret;
> +
> +	if (acrtc->enable)
> +		return;
> +
> +	if (!ctx->power_on) {
> +		ret = ade_power_up(ctx);
> +		if (ret)
> +			return;
> +	}
> +
> +	ade_set_medianoc_qos(acrtc);
> +	ade_display_enable(acrtc);
> +	acrtc->enable = true;
> +}
> +
> +static void ade_crtc_disable(struct drm_crtc *crtc)
> +{
> +	struct ade_crtc *acrtc = to_ade_crtc(crtc);
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +
> +	if (!acrtc->enable)
> +		return;
> +
> +	ade_power_down(ctx);
> +	acrtc->enable = false;
> +}
> +
> +static int ade_crtc_atomic_check(struct drm_crtc *crtc,
> +				 struct drm_crtc_state *state)
> +{
> +	/* do nothing */
> +	return 0;
> +}
> +
> +static void ade_crtc_mode_set_nofb(struct drm_crtc *crtc)
> +{
> +	struct ade_crtc *acrtc = to_ade_crtc(crtc);
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +	struct drm_display_mode *mode = &crtc->state->mode;
> +	struct drm_display_mode *adj_mode = &crtc->state->adjusted_mode;
> +
> +	if (!ctx->power_on)
> +		(void)ade_power_up(ctx);
> +	ade_ldi_set_mode(acrtc, mode, adj_mode);
> +}
> +
> +static void ade_crtc_atomic_begin(struct drm_crtc *crtc,
> +				  struct drm_crtc_state *old_state)
> +{
> +	struct ade_crtc *acrtc = to_ade_crtc(crtc);
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +
> +	if (!ctx->power_on)
> +		(void)ade_power_up(ctx);
> +}
> +
> +static void ade_crtc_atomic_flush(struct drm_crtc *crtc,
> +				  struct drm_crtc_state *old_state)
> +
> +{
> +	struct ade_crtc *acrtc = to_ade_crtc(crtc);
> +	struct ade_hw_ctx *ctx = acrtc->ctx;
> +	void __iomem *base = ctx->base;
> +
> +	/* only crtc is eanbled regs take effect */

s/eanbled/enabled

> +	if (acrtc->enable) {
> +		/* flush ade regitsters */
s/regitsters/registers

Other than the minor comments:

Reviewed-by: Archit Taneja <architt@codeaurora.org>

> +		writel(ADE_ENABLE, base + ADE_EN);
> +	}
> +}
> +
> +static const struct drm_crtc_helper_funcs ade_crtc_helper_funcs = {
> +	.enable		= ade_crtc_enable,
> +	.disable	= ade_crtc_disable,
> +	.atomic_check	= ade_crtc_atomic_check,
> +	.mode_set_nofb	= ade_crtc_mode_set_nofb,
> +	.atomic_begin	= ade_crtc_atomic_begin,
> +	.atomic_flush	= ade_crtc_atomic_flush,
> +};
> +
> +static const struct drm_crtc_funcs ade_crtc_funcs = {
> +	.destroy	= drm_crtc_cleanup,
> +	.set_config	= drm_atomic_helper_set_config,
> +	.page_flip	= drm_atomic_helper_page_flip,
> +	.reset		= drm_atomic_helper_crtc_reset,
> +	.set_property = drm_atomic_helper_crtc_set_property,
> +	.atomic_duplicate_state	= drm_atomic_helper_crtc_duplicate_state,
> +	.atomic_destroy_state	= drm_atomic_helper_crtc_destroy_state,
> +};
> +
> +static int ade_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
> +			 struct drm_plane *plane)
> +{
> +	struct kirin_drm_private *priv = dev->dev_private;
> +	struct device_node *port;
> +	int ret;
> +
> +	/* set crtc port so that
> +	 * drm_of_find_possible_crtcs call works
> +	 */
> +	port = of_get_child_by_name(dev->dev->of_node, "port");
> +	if (!port) {
> +		DRM_ERROR("no port node found in %s\n",
> +			  dev->dev->of_node->full_name);
> +		return -EINVAL;
> +	}
> +	of_node_put(port);
> +	crtc->port = port;
> +
> +	ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
> +					&ade_crtc_funcs, NULL);
> +	if (ret) {
> +		DRM_ERROR("failed to init crtc.\n");
> +		return ret;
> +	}
> +
> +	drm_crtc_helper_add(crtc, &ade_crtc_helper_funcs);
> +	priv->crtc[drm_crtc_index(crtc)] = crtc;
> +
> +	return 0;
> +}
> +
> +static int ade_dts_parse(struct platform_device *pdev, struct ade_hw_ctx *ctx)
> +{
> +	struct resource *res;
> +	struct device *dev = &pdev->dev;
> +	struct device_node *np = pdev->dev.of_node;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	ctx->base = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(ctx->base)) {
> +		DRM_ERROR("failed to remap ade io base\n");
> +		return  PTR_ERR(ctx->base);
> +	}
> +
> +	ctx->reset = devm_reset_control_get(dev, NULL);
> +	if (IS_ERR(ctx->reset))
> +		return PTR_ERR(ctx->reset);
> +
> +	ctx->noc_regmap =
> +		syscon_regmap_lookup_by_phandle(np, "hisilicon,noc-syscon");
> +	if (IS_ERR(ctx->noc_regmap)) {
> +		DRM_ERROR("failed to get noc regmap\n");
> +		return PTR_ERR(ctx->noc_regmap);
> +	}
> +
> +	ctx->irq = platform_get_irq(pdev, 0);
> +	if (ctx->irq < 0) {
> +		DRM_ERROR("failed to get irq\n");
> +		return -ENODEV;
> +	}
> +
> +	ctx->ade_core_clk = devm_clk_get(dev, "clk_ade_core");
> +	if (!ctx->ade_core_clk) {
> +		DRM_ERROR("failed to parse clk ADE_CORE\n");
> +		return -ENODEV;
> +	}
> +
> +	ctx->media_noc_clk = devm_clk_get(dev, "clk_codec_jpeg");
> +	if (!ctx->media_noc_clk) {
> +		DRM_ERROR("failed to parse clk CODEC_JPEG\n");
> +	    return -ENODEV;
> +	}
> +
> +	ctx->ade_pix_clk = devm_clk_get(dev, "clk_ade_pix");
> +	if (!ctx->ade_pix_clk) {
> +		DRM_ERROR("failed to parse clk ADE_PIX\n");
> +	    return -ENODEV;
> +	}
> +
> +	return 0;
> +}
> +
> +int ade_drm_init(struct drm_device *dev)
> +{
> +	struct platform_device *pdev = dev->platformdev;
> +	struct ade_data *ade;
> +	struct ade_hw_ctx *ctx;
> +	struct ade_crtc *acrtc;
> +	int ret;
> +
> +	ade = devm_kzalloc(dev->dev, sizeof(*ade), GFP_KERNEL);
> +	if (!ade) {
> +		DRM_ERROR("failed to alloc ade_data\n");
> +		return -ENOMEM;
> +	}
> +	platform_set_drvdata(pdev, ade);
> +
> +	ctx = &ade->ctx;
> +	acrtc = &ade->acrtc;
> +	acrtc->ctx = ctx;
> +	acrtc->out_format = LDI_OUT_RGB_888;
> +
> +	ret = ade_dts_parse(pdev, ctx);
> +	if (ret)
> +		return ret;
> +
> +	return 0;
> +}
> +
> +void ade_drm_cleanup(struct drm_device *dev)
> +{
> +	struct platform_device *pdev = dev->platformdev;
> +	struct ade_data *ade = platform_get_drvdata(pdev);
> +	struct drm_crtc *crtc = &ade->acrtc.base;
> +
> +	drm_crtc_cleanup(crtc);
> +}
> +
> +const struct kirin_dc_ops ade_dc_ops = {
> +	.init = ade_drm_init,
> +	.cleanup = ade_drm_cleanup
> +};
> diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
> index 789ebd1f5922..055729c1889c 100644
> --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
> +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
> @@ -30,8 +30,12 @@ static struct kirin_dc_ops *dc_ops;
>
>   static int kirin_drm_kms_cleanup(struct drm_device *dev)
>   {
> +	struct kirin_drm_private *priv = dev->dev_private;
> +
>   	dc_ops->cleanup(dev);
>   	drm_mode_config_cleanup(dev);
> +	devm_kfree(dev->dev, priv);
> +	dev->dev_private = NULL;
>
>   	return 0;
>   }
> @@ -55,8 +59,14 @@ static void kirin_drm_mode_config_init(struct drm_device *dev)
>
>   static int kirin_drm_kms_init(struct drm_device *dev)
>   {
> +	struct kirin_drm_private *priv;
>   	int ret;
>
> +	priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	dev->dev_private = priv;
>   	dev_set_drvdata(dev->dev, dev);
>
>   	/* dev->mode_config initialization */
> @@ -84,6 +94,8 @@ err_dc_cleanup:
>   	dc_ops->cleanup(dev);
>   err_mode_config_cleanup:
>   	drm_mode_config_cleanup(dev);
> +	devm_kfree(dev->dev, priv);
> +	dev->dev_private = NULL;
>
>   	return ret;
>   }
> @@ -221,6 +233,9 @@ static const struct component_master_ops kirin_drm_ops = {
>   };
>
>   static const struct of_device_id kirin_drm_dt_ids[] = {
> +	{ .compatible = "hisilicon,hi6220-ade",
> +	  .data = &ade_dc_ops,
> +	},
>   	{ /* end node */ },
>   };
>   MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
> diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h
> index 75e9d82356d4..5a05ad6a81db 100644
> --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h
> +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.h
> @@ -11,10 +11,18 @@
>   #ifndef __KIRIN_DRM_DRV_H__
>   #define __KIRIN_DRM_DRV_H__
>
> +#define MAX_CRTC	2
> +
>   /* display controller init/cleanup ops */
>   struct kirin_dc_ops {
>   	int (*init)(struct drm_device *dev);
>   	void (*cleanup)(struct drm_device *dev);
>   };
>
> +struct kirin_drm_private {
> +	struct drm_crtc *crtc[MAX_CRTC];
> +};
> +
> +extern const struct kirin_dc_ops ade_dc_ops;
> +
>   #endif /* __KIRIN_DRM_DRV_H__ */
>

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