[PATCH v5 00/26] drm: sun4i: add Display Engine 3.3 (DE33) support

[PATCH v5 00/26] drm: sun4i: add Display Engine 3.3 (DE33) support

[Ryan Walklin]

Hi,

V5 of this patch series adding support for the Allwinner DE33 display engine variant. V5 is rebased on torvalds/master as of today with the 6.12 drm-next patches included, with no code changes required. V3 and V4 were in turn rebased on top of the layer init and modesetting changes merged for 6.11. No functional changes from V4, fixes and reviews from previous V1-4 added, and relevant issues found by checkpatch.pl corrected.

Original blurb below:

There is existing mainline support for the DE2 and DE3 AllWinner display pipeline IP blocks, used in the A64 and H6 among others, however the H700 (as well as the H616/H618 and the T507 automotive SoC) have a newer version of the Display Engine (v3.3/DE33) which adds additional high-resolution support as well as YUV colour formats and AFBC compression support.

This patch set adds DE33 support, following up from the previous RFC [1], with significant rework to break down the previous relatively complex set into more logical steps, detailed below.

1. Refactor the existing DE2/DE3 code in readiness to support YUV colour formats in the DE3 engine (patches 1-4).
2. Add YUV420 colour format support in the DE3 driver (patches 5-12).
3. Replace the is_de3 mixer flag with an enum to support multiple DE versions (patch 13).
4. Refactor the mixer, vi_scaler and some register code to merge common init code and more easily support multiple DE versions (patches 14-17).
5. Add Arm Frame Buffer Compression (AFBC) compressed buffer support to the DE3 driver. This is currently only supported for VI layers (for HW-decoded video output) but is well integrated into these changes and a subsequent patchset to enable the Video Engine is planned. (patch 18).
6. Add DT bindings for the DE33 engine. (patches 19-21).
7. Extend the DE2/3 driver for the DE33, comprising clock, mixer, vi_scaler, fmt and csc module support (patches 22-26).

Further patchsets are planned to support HDMI and the LCD timing controller present in these SoCs.

Regards,

Ryan

Jernej Skrabec (22):
  drm: sun4i: de2/de3: Change CSC argument
  drm: sun4i: de2/de3: Merge CSC functions into one
  drm: sun4i: de2/de3: call csc setup also for UI layer
  drm: sun4i: de2: Initialize layer fields earlier
  drm: sun4i: de3: Add YUV formatter module
  drm: sun4i: de3: add format enumeration function to engine
  drm: sun4i: de3: add formatter flag to mixer config
  drm: sun4i: de3: add YUV support to the DE3 mixer
  drm: sun4i: de3: pass engine reference to ccsc setup function
  drm: sun4i: de3: add YUV support to the color space correction module
  drm: sun4i: de3: add YUV support to the TCON
  drm: sun4i: support YUV formats in VI scaler
  drm: sun4i: de2/de3: add mixer version enum
  drm: sun4i: de2/de3: refactor mixer initialisation
  drm: sun4i: vi_scaler refactor vi_scaler enablement
  drm: sun4i: de2/de3: add generic blender register reference function
  drm: sun4i: de2/de3: use generic register reference function for layer
    configuration
  drm: sun4i: de3: Implement AFBC support
  drm: sun4i: de33: mixer: add Display Engine 3.3 (DE33) support
  drm: sun4i: de33: vi_scaler: add Display Engine 3.3 (DE33) support
  drm: sun4i: de33: fmt: add Display Engine 3.3 (DE33) support
  drm: sun4i: de33: csc: add Display Engine 3.3 (DE33) support

Ryan Walklin (4):
  dt-bindings: allwinner: add H616 DE33 bus binding
  dt-bindings: allwinner: add H616 DE33 clock binding
  dt-bindings: allwinner: add H616 DE33 mixer binding
  clk: sunxi-ng: ccu: add Display Engine 3.3 (DE33) support

 .../bus/allwinner,sun50i-a64-de2.yaml         |   4 +-
 .../clock/allwinner,sun8i-a83t-de2-clk.yaml   |   1 +
 .../allwinner,sun8i-a83t-de2-mixer.yaml       |   1 +
 drivers/clk/sunxi-ng/ccu-sun8i-de2.c          |  25 ++
 drivers/gpu/drm/sun4i/Makefile                |   3 +-
 drivers/gpu/drm/sun4i/sun4i_tcon.c            |  26 +-
 drivers/gpu/drm/sun4i/sun50i_afbc.c           | 250 +++++++++++++
 drivers/gpu/drm/sun4i/sun50i_afbc.h           |  87 +++++
 drivers/gpu/drm/sun4i/sun50i_fmt.c            |  99 +++++
 drivers/gpu/drm/sun4i/sun50i_fmt.h            |  33 ++
 drivers/gpu/drm/sun4i/sun8i_csc.c             | 341 +++++++++++++++---
 drivers/gpu/drm/sun4i/sun8i_csc.h             |  20 +-
 drivers/gpu/drm/sun4i/sun8i_mixer.c           | 226 +++++++++---
 drivers/gpu/drm/sun4i/sun8i_mixer.h           |  31 +-
 drivers/gpu/drm/sun4i/sun8i_ui_layer.c        |  41 ++-
 drivers/gpu/drm/sun4i/sun8i_ui_scaler.c       |   2 +-
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c        | 133 +++++--
 drivers/gpu/drm/sun4i/sun8i_vi_scaler.c       | 115 ++++--
 drivers/gpu/drm/sun4i/sun8i_vi_scaler.h       |   2 +-
 drivers/gpu/drm/sun4i/sunxi_engine.h          |  34 ++
 20 files changed, 1269 insertions(+), 205 deletions(-)
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.c
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.h
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.c
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.h

-- 
2.46.1

[PATCH v5 01/26] drm: sun4i: de2/de3: Change CSC argument

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Currently, CSC module takes care only for converting YUV to RGB.
However, DE3 is more suited to work in YUV color space. Change CSC mode
argument to format type to be more neutral. New argument only tells
layer format type and doesn't imply output type.

This commit doesn't make any functional change.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c      | 22 +++++++++++-----------
 drivers/gpu/drm/sun4i/sun8i_csc.h      | 10 +++++-----
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 16 ++++++++--------
 3 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index 58480d8e4f704..6ebd1c3aa3ab5 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -108,7 +108,7 @@ static const u32 yuv2rgb_de3[2][3][12] = {
 };
 
 static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
-				       enum sun8i_csc_mode mode,
+				       enum format_type fmt_type,
 				       enum drm_color_encoding encoding,
 				       enum drm_color_range range)
 {
@@ -118,12 +118,12 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
 
 	table = yuv2rgb[range][encoding];
 
-	switch (mode) {
-	case SUN8I_CSC_MODE_YUV2RGB:
+	switch (fmt_type) {
+	case FORMAT_TYPE_YUV:
 		base_reg = SUN8I_CSC_COEFF(base, 0);
 		regmap_bulk_write(map, base_reg, table, 12);
 		break;
-	case SUN8I_CSC_MODE_YVU2RGB:
+	case FORMAT_TYPE_YVU:
 		for (i = 0; i < 12; i++) {
 			if ((i & 3) == 1)
 				base_reg = SUN8I_CSC_COEFF(base, i + 1);
@@ -141,7 +141,7 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
 }
 
 static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
-					    enum sun8i_csc_mode mode,
+					    enum format_type fmt_type,
 					    enum drm_color_encoding encoding,
 					    enum drm_color_range range)
 {
@@ -151,12 +151,12 @@ static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
 
 	table = yuv2rgb_de3[range][encoding];
 
-	switch (mode) {
-	case SUN8I_CSC_MODE_YUV2RGB:
+	switch (fmt_type) {
+	case FORMAT_TYPE_YUV:
 		addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0);
 		regmap_bulk_write(map, addr, table, 12);
 		break;
-	case SUN8I_CSC_MODE_YVU2RGB:
+	case FORMAT_TYPE_YVU:
 		for (i = 0; i < 12; i++) {
 			if ((i & 3) == 1)
 				addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE,
@@ -206,7 +206,7 @@ static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool enable)
 }
 
 void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
-				     enum sun8i_csc_mode mode,
+				     enum format_type fmt_type,
 				     enum drm_color_encoding encoding,
 				     enum drm_color_range range)
 {
@@ -214,14 +214,14 @@ void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
 
 	if (mixer->cfg->is_de3) {
 		sun8i_de3_ccsc_set_coefficients(mixer->engine.regs, layer,
-						mode, encoding, range);
+						fmt_type, encoding, range);
 		return;
 	}
 
 	base = ccsc_base[mixer->cfg->ccsc][layer];
 
 	sun8i_csc_set_coefficients(mixer->engine.regs, base,
-				   mode, encoding, range);
+				   fmt_type, encoding, range);
 }
 
 void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.h b/drivers/gpu/drm/sun4i/sun8i_csc.h
index 828b86fd0cabb..7322770f39f03 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.h
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.h
@@ -22,14 +22,14 @@ struct sun8i_mixer;
 
 #define SUN8I_CSC_CTRL_EN		BIT(0)
 
-enum sun8i_csc_mode {
-	SUN8I_CSC_MODE_OFF,
-	SUN8I_CSC_MODE_YUV2RGB,
-	SUN8I_CSC_MODE_YVU2RGB,
+enum format_type {
+	FORMAT_TYPE_RGB,
+	FORMAT_TYPE_YUV,
+	FORMAT_TYPE_YVU,
 };
 
 void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
-				     enum sun8i_csc_mode mode,
+				     enum format_type fmt_type,
 				     enum drm_color_encoding encoding,
 				     enum drm_color_range range);
 void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable);
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 9c09d9c08496d..8a80934e928fe 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -193,19 +193,19 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 	return 0;
 }
 
-static u32 sun8i_vi_layer_get_csc_mode(const struct drm_format_info *format)
+static u32 sun8i_vi_layer_get_format_type(const struct drm_format_info *format)
 {
 	if (!format->is_yuv)
-		return SUN8I_CSC_MODE_OFF;
+		return FORMAT_TYPE_RGB;
 
 	switch (format->format) {
 	case DRM_FORMAT_YVU411:
 	case DRM_FORMAT_YVU420:
 	case DRM_FORMAT_YVU422:
 	case DRM_FORMAT_YVU444:
-		return SUN8I_CSC_MODE_YVU2RGB;
+		return FORMAT_TYPE_YVU;
 	default:
-		return SUN8I_CSC_MODE_YUV2RGB;
+		return FORMAT_TYPE_YUV;
 	}
 }
 
@@ -213,7 +213,7 @@ static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 					 int overlay, struct drm_plane *plane)
 {
 	struct drm_plane_state *state = plane->state;
-	u32 val, ch_base, csc_mode, hw_fmt;
+	u32 val, ch_base, fmt_type, hw_fmt;
 	const struct drm_format_info *fmt;
 	int ret;
 
@@ -231,9 +231,9 @@ static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR(ch_base, overlay),
 			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_MASK, val);
 
-	csc_mode = sun8i_vi_layer_get_csc_mode(fmt);
-	if (csc_mode != SUN8I_CSC_MODE_OFF) {
-		sun8i_csc_set_ccsc_coefficients(mixer, channel, csc_mode,
+	fmt_type = sun8i_vi_layer_get_format_type(fmt);
+	if (fmt_type != FORMAT_TYPE_RGB) {
+		sun8i_csc_set_ccsc_coefficients(mixer, channel, fmt_type,
 						state->color_encoding,
 						state->color_range);
 		sun8i_csc_enable_ccsc(mixer, channel, true);
-- 
2.46.1

Re: [PATCH v5 01/26] drm: sun4i: de2/de3: Change CSC argument

[Dmitry Baryshkov]

On Sun, Sep 29, 2024 at 10:04:33PM +1300, Ryan Walklin wrote:
> From: Jernej Skrabec <jernej.skrabec@gmail.com>
> 
> Currently, CSC module takes care only for converting YUV to RGB.
> However, DE3 is more suited to work in YUV color space. Change CSC mode
> argument to format type to be more neutral. New argument only tells
> layer format type and doesn't imply output type.
> 
> This commit doesn't make any functional change.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> Reviewed-by: Andre Przywara <andre.przywara@arm.com>
> ---
>  drivers/gpu/drm/sun4i/sun8i_csc.c      | 22 +++++++++++-----------
>  drivers/gpu/drm/sun4i/sun8i_csc.h      | 10 +++++-----
>  drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 16 ++++++++--------
>  3 files changed, 24 insertions(+), 24 deletions(-)
> 
>  void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
> diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.h b/drivers/gpu/drm/sun4i/sun8i_csc.h
> index 828b86fd0cabb..7322770f39f03 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_csc.h
> +++ b/drivers/gpu/drm/sun4i/sun8i_csc.h
> @@ -22,14 +22,14 @@ struct sun8i_mixer;
>  
>  #define SUN8I_CSC_CTRL_EN		BIT(0)
>  
> -enum sun8i_csc_mode {
> -	SUN8I_CSC_MODE_OFF,
> -	SUN8I_CSC_MODE_YUV2RGB,
> -	SUN8I_CSC_MODE_YVU2RGB,
> +enum format_type {

enum sun8i_format_type, unless there is a strong reason to name it
otherwise.

> +	FORMAT_TYPE_RGB,
> +	FORMAT_TYPE_YUV,
> +	FORMAT_TYPE_YVU,
>  };
>  
>  void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
> -				     enum sun8i_csc_mode mode,
> +				     enum format_type fmt_type,
>  				     enum drm_color_encoding encoding,
>  				     enum drm_color_range range);
>  void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable);
> 

-- 
With best wishes
Dmitry

Re: [PATCH v5 01/26] drm: sun4i: de2/de3: Change CSC argument

[Ryan Walklin]

On Sun, 20 Oct 2024, at 3:11 AM, Dmitry Baryshkov wrote:
> On Sun, Sep 29, 2024 at 10:04:33PM +1300, Ryan Walklin wrote:

Hi Dmitry, thanks for reviewing, and apologies for the delay in replying.

>> -enum sun8i_csc_mode {
>> -	SUN8I_CSC_MODE_OFF,
>> -	SUN8I_CSC_MODE_YUV2RGB,
>> -	SUN8I_CSC_MODE_YVU2RGB,
>> +enum format_type {
>
> enum sun8i_format_type, unless there is a strong reason to name it
> otherwise.

No problem, will make that change.

Regards,

Ryan

[PATCH v5 02/26] drm: sun4i: de2/de3: Merge CSC functions into one

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

At the moment the colour space conversion is handled by two functions:
one to setup the conversion parameters, and another one to enable the
conversion. Merging both into one gives more flexibility for upcoming
extensions to support whole YUV pipelines, in the DE33.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c      | 89 ++++++++++----------------
 drivers/gpu/drm/sun4i/sun8i_csc.h      |  9 ++-
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 11 +---
 3 files changed, 40 insertions(+), 69 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index 6ebd1c3aa3ab5..0dcbc0866ae82 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -107,23 +107,28 @@ static const u32 yuv2rgb_de3[2][3][12] = {
 	},
 };
 
-static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
-				       enum format_type fmt_type,
-				       enum drm_color_encoding encoding,
-				       enum drm_color_range range)
+static void sun8i_csc_setup(struct regmap *map, u32 base,
+			    enum format_type fmt_type,
+			    enum drm_color_encoding encoding,
+			    enum drm_color_range range)
 {
+	u32 base_reg, val;
 	const u32 *table;
-	u32 base_reg;
 	int i;
 
 	table = yuv2rgb[range][encoding];
 
 	switch (fmt_type) {
+	case FORMAT_TYPE_RGB:
+		val = 0;
+		break;
 	case FORMAT_TYPE_YUV:
+		val = SUN8I_CSC_CTRL_EN;
 		base_reg = SUN8I_CSC_COEFF(base, 0);
 		regmap_bulk_write(map, base_reg, table, 12);
 		break;
 	case FORMAT_TYPE_YVU:
+		val = SUN8I_CSC_CTRL_EN;
 		for (i = 0; i < 12; i++) {
 			if ((i & 3) == 1)
 				base_reg = SUN8I_CSC_COEFF(base, i + 1);
@@ -135,28 +140,37 @@ static void sun8i_csc_set_coefficients(struct regmap *map, u32 base,
 		}
 		break;
 	default:
+		val = 0;
 		DRM_WARN("Wrong CSC mode specified.\n");
 		return;
 	}
+
+	regmap_write(map, SUN8I_CSC_CTRL(base), val);
 }
 
-static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
-					    enum format_type fmt_type,
-					    enum drm_color_encoding encoding,
-					    enum drm_color_range range)
+static void sun8i_de3_ccsc_setup(struct regmap *map, int layer,
+				 enum format_type fmt_type,
+				 enum drm_color_encoding encoding,
+				 enum drm_color_range range)
 {
+	u32 addr, val, mask;
 	const u32 *table;
-	u32 addr;
 	int i;
 
+	mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer);
 	table = yuv2rgb_de3[range][encoding];
 
 	switch (fmt_type) {
+	case FORMAT_TYPE_RGB:
+		val = 0;
+		break;
 	case FORMAT_TYPE_YUV:
+		val = mask;
 		addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0);
 		regmap_bulk_write(map, addr, table, 12);
 		break;
 	case FORMAT_TYPE_YVU:
+		val = mask;
 		for (i = 0; i < 12; i++) {
 			if ((i & 3) == 1)
 				addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE,
@@ -173,67 +187,30 @@ static void sun8i_de3_ccsc_set_coefficients(struct regmap *map, int layer,
 		}
 		break;
 	default:
+		val = 0;
 		DRM_WARN("Wrong CSC mode specified.\n");
 		return;
 	}
-}
-
-static void sun8i_csc_enable(struct regmap *map, u32 base, bool enable)
-{
-	u32 val;
-
-	if (enable)
-		val = SUN8I_CSC_CTRL_EN;
-	else
-		val = 0;
-
-	regmap_update_bits(map, SUN8I_CSC_CTRL(base), SUN8I_CSC_CTRL_EN, val);
-}
-
-static void sun8i_de3_ccsc_enable(struct regmap *map, int layer, bool enable)
-{
-	u32 val, mask;
-
-	mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer);
-
-	if (enable)
-		val = mask;
-	else
-		val = 0;
 
 	regmap_update_bits(map, SUN50I_MIXER_BLEND_CSC_CTL(DE3_BLD_BASE),
 			   mask, val);
 }
 
-void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
-				     enum format_type fmt_type,
-				     enum drm_color_encoding encoding,
-				     enum drm_color_range range)
-{
-	u32 base;
-
-	if (mixer->cfg->is_de3) {
-		sun8i_de3_ccsc_set_coefficients(mixer->engine.regs, layer,
-						fmt_type, encoding, range);
-		return;
-	}
-
-	base = ccsc_base[mixer->cfg->ccsc][layer];
-
-	sun8i_csc_set_coefficients(mixer->engine.regs, base,
-				   fmt_type, encoding, range);
-}
-
-void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable)
+void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
+			enum format_type fmt_type,
+			enum drm_color_encoding encoding,
+			enum drm_color_range range)
 {
 	u32 base;
 
 	if (mixer->cfg->is_de3) {
-		sun8i_de3_ccsc_enable(mixer->engine.regs, layer, enable);
+		sun8i_de3_ccsc_setup(mixer->engine.regs, layer,
+				     fmt_type, encoding, range);
 		return;
 	}
 
 	base = ccsc_base[mixer->cfg->ccsc][layer];
 
-	sun8i_csc_enable(mixer->engine.regs, base, enable);
+	sun8i_csc_setup(mixer->engine.regs, base,
+			fmt_type, encoding, range);
 }
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.h b/drivers/gpu/drm/sun4i/sun8i_csc.h
index 7322770f39f03..b7546e06e315c 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.h
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.h
@@ -28,10 +28,9 @@ enum format_type {
 	FORMAT_TYPE_YVU,
 };
 
-void sun8i_csc_set_ccsc_coefficients(struct sun8i_mixer *mixer, int layer,
-				     enum format_type fmt_type,
-				     enum drm_color_encoding encoding,
-				     enum drm_color_range range);
-void sun8i_csc_enable_ccsc(struct sun8i_mixer *mixer, int layer, bool enable);
+void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
+			enum format_type fmt_type,
+			enum drm_color_encoding encoding,
+			enum drm_color_range range);
 
 #endif
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 8a80934e928fe..f3a5329351caa 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -232,14 +232,9 @@ static int sun8i_vi_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 			   SUN8I_MIXER_CHAN_VI_LAYER_ATTR_FBFMT_MASK, val);
 
 	fmt_type = sun8i_vi_layer_get_format_type(fmt);
-	if (fmt_type != FORMAT_TYPE_RGB) {
-		sun8i_csc_set_ccsc_coefficients(mixer, channel, fmt_type,
-						state->color_encoding,
-						state->color_range);
-		sun8i_csc_enable_ccsc(mixer, channel, true);
-	} else {
-		sun8i_csc_enable_ccsc(mixer, channel, false);
-	}
+	sun8i_csc_set_ccsc(mixer, channel, fmt_type,
+			   state->color_encoding,
+			   state->color_range);
 
 	if (!fmt->is_yuv)
 		val = SUN8I_MIXER_CHAN_VI_LAYER_ATTR_RGB_MODE;
-- 
2.46.1

[PATCH v5 03/26] drm: sun4i: de2/de3: call csc setup also for UI layer

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Currently, only VI layer calls CSC setup function. This comes from DE2
limitation, which doesn't have CSC unit for UI layers. However, DE3 has
separate CSC units for each layer. This allows display pipeline to make
output signal in different color spaces. To support both use cases, add
a call to CSC setup function also in UI layer code. For DE2, this will
be a no-op, but it will allow DE3 to output signal in multiple formats.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c      | 8 +++++---
 drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 6 ++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index 0dcbc0866ae82..68d955c63b05b 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -209,8 +209,10 @@ void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
 		return;
 	}
 
-	base = ccsc_base[mixer->cfg->ccsc][layer];
+	if (layer < mixer->cfg->vi_num) {
+		base = ccsc_base[mixer->cfg->ccsc][layer];
 
-	sun8i_csc_setup(mixer->engine.regs, base,
-			fmt_type, encoding, range);
+		sun8i_csc_setup(mixer->engine.regs, base,
+				fmt_type, encoding, range);
+	}
 }
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index b90e5edef4e88..aa987bca1dbb9 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -20,6 +20,7 @@
 #include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
 
+#include "sun8i_csc.h"
 #include "sun8i_mixer.h"
 #include "sun8i_ui_layer.h"
 #include "sun8i_ui_scaler.h"
@@ -135,6 +136,11 @@ static int sun8i_ui_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, overlay),
 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_MASK, val);
 
+	/* Note: encoding and range arguments are ignored for RGB */
+	sun8i_csc_set_ccsc(mixer, channel, FORMAT_TYPE_RGB,
+			   DRM_COLOR_YCBCR_BT601,
+			   DRM_COLOR_YCBCR_FULL_RANGE);
+
 	return 0;
 }
 
-- 
2.46.1

[PATCH v5 04/26] drm: sun4i: de2: Initialize layer fields earlier

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

drm_universal_plane_init() can already call some callbacks, like
format_mod_supported, during initialization. Because of that, fields
should be initialized beforehand.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Co-developed-by: Ryan Walklin <ryan@testtoast.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 9 +++++----
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 9 +++++----
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index aa987bca1dbb9..cb9b694fef101 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -295,6 +295,11 @@ struct sun8i_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
 	if (!layer)
 		return ERR_PTR(-ENOMEM);
 
+	layer->mixer = mixer;
+	layer->type = SUN8I_LAYER_TYPE_UI;
+	layer->channel = channel;
+	layer->overlay = 0;
+
 	if (index == 0)
 		type = DRM_PLANE_TYPE_PRIMARY;
 
@@ -325,10 +330,6 @@ struct sun8i_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
 	}
 
 	drm_plane_helper_add(&layer->plane, &sun8i_ui_layer_helper_funcs);
-	layer->mixer = mixer;
-	layer->type = SUN8I_LAYER_TYPE_UI;
-	layer->channel = channel;
-	layer->overlay = 0;
 
 	return layer;
 }
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index f3a5329351caa..3c657b069d1f4 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -478,6 +478,11 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 	if (!layer)
 		return ERR_PTR(-ENOMEM);
 
+	layer->mixer = mixer;
+	layer->type = SUN8I_LAYER_TYPE_VI;
+	layer->channel = index;
+	layer->overlay = 0;
+
 	if (mixer->cfg->is_de3) {
 		formats = sun8i_vi_layer_de3_formats;
 		format_count = ARRAY_SIZE(sun8i_vi_layer_de3_formats);
@@ -536,10 +541,6 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 	}
 
 	drm_plane_helper_add(&layer->plane, &sun8i_vi_layer_helper_funcs);
-	layer->mixer = mixer;
-	layer->type = SUN8I_LAYER_TYPE_VI;
-	layer->channel = index;
-	layer->overlay = 0;
 
 	return layer;
 }
-- 
2.46.1

[PATCH v5 05/26] drm: sun4i: de3: Add YUV formatter module

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The display engine formatter (FMT) module is present in the DE3 engine
and provides YUV444 to YUV422/YUV420 conversion, format re-mapping and
color depth conversion.

Add support for this module.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/Makefile     |  3 +-
 drivers/gpu/drm/sun4i/sun50i_fmt.c | 82 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun50i_fmt.h | 32 ++++++++++++
 3 files changed, 116 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.c
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.h

diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index bad7497a0d11e..3f516329f51ee 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -16,7 +16,8 @@ sun8i-drm-hdmi-y		+= sun8i_hdmi_phy_clk.o
 
 sun8i-mixer-y			+= sun8i_mixer.o sun8i_ui_layer.o \
 				   sun8i_vi_layer.o sun8i_ui_scaler.o \
-				   sun8i_vi_scaler.o sun8i_csc.o
+				   sun8i_vi_scaler.o sun8i_csc.o \
+				   sun50i_fmt.o
 
 sun4i-tcon-y			+= sun4i_crtc.o
 sun4i-tcon-y			+= sun4i_tcon_dclk.o
diff --git a/drivers/gpu/drm/sun4i/sun50i_fmt.c b/drivers/gpu/drm/sun4i/sun50i_fmt.c
new file mode 100644
index 0000000000000..050a8716ae862
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun50i_fmt.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Jernej Skrabec <jernej.skrabec@gmail.com>
+ */
+
+#include <uapi/linux/media-bus-format.h>
+
+#include "sun50i_fmt.h"
+
+static bool sun50i_fmt_is_10bit(u32 format)
+{
+	switch (format) {
+	case MEDIA_BUS_FMT_RGB101010_1X30:
+	case MEDIA_BUS_FMT_YUV10_1X30:
+	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+	case MEDIA_BUS_FMT_UYVY10_1X20:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static u32 sun50i_fmt_get_colorspace(u32 format)
+{
+	switch (format) {
+	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+		return SUN50I_FMT_CS_YUV420;
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+	case MEDIA_BUS_FMT_UYVY10_1X20:
+		return SUN50I_FMT_CS_YUV422;
+	default:
+		return SUN50I_FMT_CS_YUV444RGB;
+	}
+}
+
+static void sun50i_fmt_de3_limits(u32 *limits, u32 colorspace, bool bit10)
+{
+	if (colorspace != SUN50I_FMT_CS_YUV444RGB) {
+		limits[0] = SUN50I_FMT_LIMIT(64, 940);
+		limits[1] = SUN50I_FMT_LIMIT(64, 960);
+		limits[2] = SUN50I_FMT_LIMIT(64, 960);
+	} else if (bit10) {
+		limits[0] = SUN50I_FMT_LIMIT(0, 1023);
+		limits[1] = SUN50I_FMT_LIMIT(0, 1023);
+		limits[2] = SUN50I_FMT_LIMIT(0, 1023);
+	} else {
+		limits[0] = SUN50I_FMT_LIMIT(0, 1021);
+		limits[1] = SUN50I_FMT_LIMIT(0, 1021);
+		limits[2] = SUN50I_FMT_LIMIT(0, 1021);
+	}
+}
+
+void sun50i_fmt_setup(struct sun8i_mixer *mixer, u16 width,
+		      u16 height, u32 format)
+{
+	u32 colorspace, limit[3], base;
+	struct regmap *regs;
+	bool bit10;
+
+	colorspace = sun50i_fmt_get_colorspace(format);
+	bit10 = sun50i_fmt_is_10bit(format);
+	base = SUN50I_FMT_DE3;
+	regs = sun8i_blender_regmap(mixer);
+
+	sun50i_fmt_de3_limits(limit, colorspace, bit10);
+
+	regmap_write(regs, SUN50I_FMT_CTRL(base), 0);
+
+	regmap_write(regs, SUN50I_FMT_SIZE(base),
+		     SUN8I_MIXER_SIZE(width, height));
+	regmap_write(regs, SUN50I_FMT_SWAP(base), 0);
+	regmap_write(regs, SUN50I_FMT_DEPTH(base), bit10);
+	regmap_write(regs, SUN50I_FMT_FORMAT(base), colorspace);
+	regmap_write(regs, SUN50I_FMT_COEF(base), 0);
+
+	regmap_write(regs, SUN50I_FMT_LMT_Y(base), limit[0]);
+	regmap_write(regs, SUN50I_FMT_LMT_C0(base), limit[1]);
+	regmap_write(regs, SUN50I_FMT_LMT_C1(base), limit[2]);
+
+	regmap_write(regs, SUN50I_FMT_CTRL(base), 1);
+}
diff --git a/drivers/gpu/drm/sun4i/sun50i_fmt.h b/drivers/gpu/drm/sun4i/sun50i_fmt.h
new file mode 100644
index 0000000000000..4127f7206aade
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun50i_fmt.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) Jernej Skrabec <jernej.skrabec@gmail.com>
+ */
+
+#ifndef _SUN50I_FMT_H_
+#define _SUN50I_FMT_H_
+
+#include "sun8i_mixer.h"
+
+#define SUN50I_FMT_DE3 0xa8000
+
+#define SUN50I_FMT_CTRL(base)   ((base) + 0x00)
+#define SUN50I_FMT_SIZE(base)   ((base) + 0x04)
+#define SUN50I_FMT_SWAP(base)   ((base) + 0x08)
+#define SUN50I_FMT_DEPTH(base)  ((base) + 0x0c)
+#define SUN50I_FMT_FORMAT(base) ((base) + 0x10)
+#define SUN50I_FMT_COEF(base)   ((base) + 0x14)
+#define SUN50I_FMT_LMT_Y(base)  ((base) + 0x20)
+#define SUN50I_FMT_LMT_C0(base) ((base) + 0x24)
+#define SUN50I_FMT_LMT_C1(base) ((base) + 0x28)
+
+#define SUN50I_FMT_LIMIT(low, high) (((high) << 16) | (low))
+
+#define SUN50I_FMT_CS_YUV444RGB 0
+#define SUN50I_FMT_CS_YUV422    1
+#define SUN50I_FMT_CS_YUV420    2
+
+void sun50i_fmt_setup(struct sun8i_mixer *mixer, u16 width,
+		      u16 height, u32 format);
+
+#endif
-- 
2.46.1

[PATCH v5 06/26] drm: sun4i: de3: add format enumeration function to engine

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The DE3 display engine supports YUV formats in addition to RGB.

Add an optional format enumeration function to the engine.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sunxi_engine.h | 29 ++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h
index ec0c4932f15cf..c48cbc1aceb80 100644
--- a/drivers/gpu/drm/sun4i/sunxi_engine.h
+++ b/drivers/gpu/drm/sun4i/sunxi_engine.h
@@ -123,6 +123,17 @@ struct sunxi_engine_ops {
 	 */
 	void (*mode_set)(struct sunxi_engine *engine,
 			 const struct drm_display_mode *mode);
+
+	/**
+	 * @get_supported_fmts
+	 *
+	 * This callback is used to enumerate all supported output
+	 * formats by the engine. They are used for bridge format
+	 * negotiation.
+	 *
+	 * This function is optional.
+	 */
+	u32 *(*get_supported_fmts)(struct sunxi_engine *engine, u32 *num);
 };
 
 /**
@@ -215,4 +226,22 @@ sunxi_engine_mode_set(struct sunxi_engine *engine,
 	if (engine->ops && engine->ops->mode_set)
 		engine->ops->mode_set(engine, mode);
 }
+
+/**
+ * sunxi_engine_get_supported_formats - Provide array of supported formats
+ * @engine:	pointer to the engine
+ * @num:	pointer to variable, which will hold number of formats
+ *
+ * This list can be used for format negotiation by bridge.
+ */
+static inline u32 *
+sunxi_engine_get_supported_formats(struct sunxi_engine *engine, u32 *num)
+{
+	if (engine->ops && engine->ops->get_supported_fmts)
+		return engine->ops->get_supported_fmts(engine, num);
+
+	*num = 0;
+
+	return NULL;
+}
 #endif /* _SUNXI_ENGINE_H_ */
-- 
2.46.1

[PATCH v5 07/26] drm: sun4i: de3: add formatter flag to mixer config

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Only the DE3 (and newer) display engines have a formatter module. This
could be inferred from the is_de3 flag alone, however this will not
scale with addition of future DE versions in subsequent patches.

Add a separate flag to signal this in the mixer configuration.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c | 1 +
 drivers/gpu/drm/sun4i/sun8i_mixer.h | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index bd0fe2c6624e6..252827715de1d 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -717,6 +717,7 @@ static const struct sun8i_mixer_cfg sun50i_a64_mixer1_cfg = {
 static const struct sun8i_mixer_cfg sun50i_h6_mixer0_cfg = {
 	.ccsc		= CCSC_MIXER0_LAYOUT,
 	.is_de3		= true,
+	.has_formatter	= 1,
 	.mod_rate	= 600000000,
 	.scaler_mask	= 0xf,
 	.scanline_yuv	= 4096,
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index d7898c9c9cc0c..8417b8fef2e1f 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -163,6 +163,7 @@ enum {
  * @mod_rate: module clock rate that needs to be set in order to have
  *	a functional block.
  * @is_de3: true, if this is next gen display engine 3.0, false otherwise.
+ * @has_formatter: true, if mixer has formatter core, for 10-bit and YUV handling
  * @scaline_yuv: size of a scanline for VI scaler for YUV formats.
  */
 struct sun8i_mixer_cfg {
@@ -172,6 +173,7 @@ struct sun8i_mixer_cfg {
 	int		ccsc;
 	unsigned long	mod_rate;
 	unsigned int	is_de3 : 1;
+	unsigned int    has_formatter : 1;
 	unsigned int	scanline_yuv;
 };
 
-- 
2.46.1

[PATCH v5 08/26] drm: sun4i: de3: add YUV support to the DE3 mixer

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The mixer in the DE3 display engine supports YUV 8 and 10 bit
formats in addition to 8-bit RGB. Add the required register
configuration and format enumeration callback functions to the mixer,
and store the in-use output format (defaulting to RGB) and color
encoding in engine variables.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>

---
Changelog v4..v5:
- Remove trailing whitespace
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c  | 53 ++++++++++++++++++++++++++--
 drivers/gpu/drm/sun4i/sunxi_engine.h |  5 +++
 2 files changed, 55 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 252827715de1d..a50c583852edf 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -23,7 +23,10 @@
 #include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
 
+#include <uapi/linux/media-bus-format.h>
+
 #include "sun4i_drv.h"
+#include "sun50i_fmt.h"
 #include "sun8i_mixer.h"
 #include "sun8i_ui_layer.h"
 #include "sun8i_vi_layer.h"
@@ -390,12 +393,52 @@ static void sun8i_mixer_mode_set(struct sunxi_engine *engine,
 
 	DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
 			 interlaced ? "on" : "off");
+
+	if (engine->format == MEDIA_BUS_FMT_RGB888_1X24)
+		val = SUN8I_MIXER_BLEND_COLOR_BLACK;
+	else
+		val = 0xff108080;
+
+	regmap_write(mixer->engine.regs,
+		     SUN8I_MIXER_BLEND_BKCOLOR(bld_base), val);
+	regmap_write(mixer->engine.regs,
+		     SUN8I_MIXER_BLEND_ATTR_FCOLOR(bld_base, 0), val);
+
+	if (mixer->cfg->has_formatter)
+		sun50i_fmt_setup(mixer, mode->hdisplay,
+				 mode->vdisplay, mixer->engine.format);
+}
+
+static u32 *sun8i_mixer_get_supported_fmts(struct sunxi_engine *engine, u32 *num)
+{
+	struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
+	u32 *formats, count;
+
+	count = 0;
+
+	formats = kcalloc(5, sizeof(*formats), GFP_KERNEL);
+	if (!formats)
+		return NULL;
+
+	if (mixer->cfg->has_formatter) {
+		formats[count++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30;
+		formats[count++] = MEDIA_BUS_FMT_YUV8_1X24;
+		formats[count++] = MEDIA_BUS_FMT_UYVY8_1X16;
+		formats[count++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
+	}
+
+	formats[count++] = MEDIA_BUS_FMT_RGB888_1X24;
+
+	*num = count;
+
+	return formats;
 }
 
 static const struct sunxi_engine_ops sun8i_engine_ops = {
-	.commit		= sun8i_mixer_commit,
-	.layers_init	= sun8i_layers_init,
-	.mode_set	= sun8i_mixer_mode_set,
+	.commit			= sun8i_mixer_commit,
+	.layers_init		= sun8i_layers_init,
+	.mode_set		= sun8i_mixer_mode_set,
+	.get_supported_fmts	= sun8i_mixer_get_supported_fmts,
 };
 
 static const struct regmap_config sun8i_mixer_regmap_config = {
@@ -456,6 +499,10 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 	dev_set_drvdata(dev, mixer);
 	mixer->engine.ops = &sun8i_engine_ops;
 	mixer->engine.node = dev->of_node;
+	/* default output format, supported by all mixers */
+	mixer->engine.format = MEDIA_BUS_FMT_RGB888_1X24;
+	/* default color encoding, ignored with RGB I/O */
+	mixer->engine.encoding = DRM_COLOR_YCBCR_BT601;
 
 	if (of_property_present(dev->of_node, "iommus")) {
 		/*
diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h
index c48cbc1aceb80..ffafc29b3a0c3 100644
--- a/drivers/gpu/drm/sun4i/sunxi_engine.h
+++ b/drivers/gpu/drm/sun4i/sunxi_engine.h
@@ -6,6 +6,8 @@
 #ifndef _SUNXI_ENGINE_H_
 #define _SUNXI_ENGINE_H_
 
+#include <drm/drm_color_mgmt.h>
+
 struct drm_plane;
 struct drm_crtc;
 struct drm_device;
@@ -151,6 +153,9 @@ struct sunxi_engine {
 
 	int id;
 
+	u32				format;
+	enum drm_color_encoding		encoding;
+
 	/* Engine list management */
 	struct list_head		list;
 };
-- 
2.46.1

Re: [PATCH v5 08/26] drm: sun4i: de3: add YUV support to the DE3 mixer

[Dmitry Baryshkov]

On Sun, Sep 29, 2024 at 10:04:40PM +1300, Ryan Walklin wrote:
> From: Jernej Skrabec <jernej.skrabec@gmail.com>
> 
> The mixer in the DE3 display engine supports YUV 8 and 10 bit
> formats in addition to 8-bit RGB. Add the required register
> configuration and format enumeration callback functions to the mixer,
> and store the in-use output format (defaulting to RGB) and color
> encoding in engine variables.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> 
> ---
> Changelog v4..v5:
> - Remove trailing whitespace
> ---
>  drivers/gpu/drm/sun4i/sun8i_mixer.c  | 53 ++++++++++++++++++++++++++--
>  drivers/gpu/drm/sun4i/sunxi_engine.h |  5 +++
>  2 files changed, 55 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> index 252827715de1d..a50c583852edf 100644
> --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> @@ -23,7 +23,10 @@
>  #include <drm/drm_gem_dma_helper.h>
>  #include <drm/drm_probe_helper.h>
>  
> +#include <uapi/linux/media-bus-format.h>
> +
>  #include "sun4i_drv.h"
> +#include "sun50i_fmt.h"
>  #include "sun8i_mixer.h"
>  #include "sun8i_ui_layer.h"
>  #include "sun8i_vi_layer.h"
> @@ -390,12 +393,52 @@ static void sun8i_mixer_mode_set(struct sunxi_engine *engine,
>  
>  	DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
>  			 interlaced ? "on" : "off");
> +
> +	if (engine->format == MEDIA_BUS_FMT_RGB888_1X24)
> +		val = SUN8I_MIXER_BLEND_COLOR_BLACK;
> +	else
> +		val = 0xff108080;
> +
> +	regmap_write(mixer->engine.regs,
> +		     SUN8I_MIXER_BLEND_BKCOLOR(bld_base), val);
> +	regmap_write(mixer->engine.regs,
> +		     SUN8I_MIXER_BLEND_ATTR_FCOLOR(bld_base, 0), val);
> +
> +	if (mixer->cfg->has_formatter)
> +		sun50i_fmt_setup(mixer, mode->hdisplay,
> +				 mode->vdisplay, mixer->engine.format);
> +}
> +
> +static u32 *sun8i_mixer_get_supported_fmts(struct sunxi_engine *engine, u32 *num)
> +{
> +	struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
> +	u32 *formats, count;
> +
> +	count = 0;
> +
> +	formats = kcalloc(5, sizeof(*formats), GFP_KERNEL);
> +	if (!formats)
> +		return NULL;
> +
> +	if (mixer->cfg->has_formatter) {
> +		formats[count++] = MEDIA_BUS_FMT_UYYVYY10_0_5X30;
> +		formats[count++] = MEDIA_BUS_FMT_YUV8_1X24;
> +		formats[count++] = MEDIA_BUS_FMT_UYVY8_1X16;
> +		formats[count++] = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
> +	}
> +
> +	formats[count++] = MEDIA_BUS_FMT_RGB888_1X24;
> +
> +	*num = count;
> +
> +	return formats;
>  }
>  
>  static const struct sunxi_engine_ops sun8i_engine_ops = {
> -	.commit		= sun8i_mixer_commit,
> -	.layers_init	= sun8i_layers_init,
> -	.mode_set	= sun8i_mixer_mode_set,
> +	.commit			= sun8i_mixer_commit,
> +	.layers_init		= sun8i_layers_init,
> +	.mode_set		= sun8i_mixer_mode_set,
> +	.get_supported_fmts	= sun8i_mixer_get_supported_fmts,
>  };
>  
>  static const struct regmap_config sun8i_mixer_regmap_config = {
> @@ -456,6 +499,10 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
>  	dev_set_drvdata(dev, mixer);
>  	mixer->engine.ops = &sun8i_engine_ops;
>  	mixer->engine.node = dev->of_node;
> +	/* default output format, supported by all mixers */
> +	mixer->engine.format = MEDIA_BUS_FMT_RGB888_1X24;
> +	/* default color encoding, ignored with RGB I/O */
> +	mixer->engine.encoding = DRM_COLOR_YCBCR_BT601;
>  
>  	if (of_property_present(dev->of_node, "iommus")) {
>  		/*
> diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h
> index c48cbc1aceb80..ffafc29b3a0c3 100644
> --- a/drivers/gpu/drm/sun4i/sunxi_engine.h
> +++ b/drivers/gpu/drm/sun4i/sunxi_engine.h
> @@ -6,6 +6,8 @@
>  #ifndef _SUNXI_ENGINE_H_
>  #define _SUNXI_ENGINE_H_
>  
> +#include <drm/drm_color_mgmt.h>
> +
>  struct drm_plane;
>  struct drm_crtc;
>  struct drm_device;
> @@ -151,6 +153,9 @@ struct sunxi_engine {
>  
>  	int id;
>  
> +	u32				format;
> +	enum drm_color_encoding		encoding;

Should these be a part of the state instead of being a part of the
sunxi_engine?

> +
>  	/* Engine list management */
>  	struct list_head		list;
>  };
> -- 
> 2.46.1
> 

-- 
With best wishes
Dmitry

Re: [PATCH v5 08/26] drm: sun4i: de3: add YUV support to the DE3 mixer

[Ryan Walklin]

On Sun, 20 Oct 2024, at 3:14 AM, Dmitry Baryshkov wrote:
> On Sun, Sep 29, 2024 at 10:04:40PM +1300, Ryan Walklin wrote:

>> diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h
>> index c48cbc1aceb80..ffafc29b3a0c3 100644
>> --- a/drivers/gpu/drm/sun4i/sunxi_engine.h
>> +++ b/drivers/gpu/drm/sun4i/sunxi_engine.h

>> @@ -151,6 +153,9 @@ struct sunxi_engine {
>>  
>>  	int id;
>>  
>> +	u32				format;
>> +	enum drm_color_encoding		encoding;
>
> Should these be a part of the state instead of being a part of the
> sunxi_engine?

Sure, would you suggest in sun8i_mixer_cfg?

Regards,

Ryan

Re: [PATCH v5 08/26] drm: sun4i: de3: add YUV support to the DE3 mixer

[Ryan Walklin]

On Sat, 15 Feb 2025, at 2:18 PM, Ryan Walklin wrote:
> On Sun, 20 Oct 2024, at 3:14 AM, Dmitry Baryshkov wrote:
>> On Sun, Sep 29, 2024 at 10:04:40PM +1300, Ryan Walklin wrote:
>
>>> diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h
>>> index c48cbc1aceb80..ffafc29b3a0c3 100644
>>> --- a/drivers/gpu/drm/sun4i/sunxi_engine.h
>>> +++ b/drivers/gpu/drm/sun4i/sunxi_engine.h
>
>>> @@ -151,6 +153,9 @@ struct sunxi_engine {
>>>  
>>>  	int id;
>>>  
>>> +	u32				format;
>>> +	enum drm_color_encoding		encoding;
>>
>> Should these be a part of the state instead of being a part of the
>> sunxi_engine?
>
> Sure, would you suggest in sun8i_mixer_cfg?

Hmm, on second thought the mixer config is a const struct, presumably because it is defined per engine variant in sun8i_mixer.c. Is there a better place to store state like this? Otherwise the engine may not be the worst choice, as the color format and encoding apply to the entire pipeline, at least in the case of a single display?

Regards,

Ryan

[PATCH v5 09/26] drm: sun4i: de3: pass engine reference to ccsc setup function

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Configuration of the DE3 colorspace and dynamic range correction module
requires knowledge of the current video format and encoding.

Pass the display engine by reference to the csc setup function, rather
than the register map alone, to allow access to this information.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index 68d955c63b05b..8a336ccb27d33 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -148,17 +148,19 @@ static void sun8i_csc_setup(struct regmap *map, u32 base,
 	regmap_write(map, SUN8I_CSC_CTRL(base), val);
 }
 
-static void sun8i_de3_ccsc_setup(struct regmap *map, int layer,
+static void sun8i_de3_ccsc_setup(struct sunxi_engine *engine, int layer,
 				 enum format_type fmt_type,
 				 enum drm_color_encoding encoding,
 				 enum drm_color_range range)
 {
 	u32 addr, val, mask;
+	struct regmap *map;
 	const u32 *table;
 	int i;
 
 	mask = SUN50I_MIXER_BLEND_CSC_CTL_EN(layer);
 	table = yuv2rgb_de3[range][encoding];
+	map = engine->regs;
 
 	switch (fmt_type) {
 	case FORMAT_TYPE_RGB:
@@ -204,7 +206,7 @@ void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
 	u32 base;
 
 	if (mixer->cfg->is_de3) {
-		sun8i_de3_ccsc_setup(mixer->engine.regs, layer,
+		sun8i_de3_ccsc_setup(&mixer->engine, layer,
 				     fmt_type, encoding, range);
 		return;
 	}
-- 
2.46.1

[PATCH v5 10/26] drm: sun4i: de3: add YUV support to the color space correction module

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Add coefficients and support for YUV formats to the display engine
colorspace and dynamic range correction submodule.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c | 164 +++++++++++++++++++++++++++++-
 1 file changed, 162 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index 8a336ccb27d33..e12a81fa91083 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -5,6 +5,8 @@
 
 #include <drm/drm_print.h>
 
+#include <uapi/linux/media-bus-format.h>
+
 #include "sun8i_csc.h"
 #include "sun8i_mixer.h"
 
@@ -107,6 +109,135 @@ static const u32 yuv2rgb_de3[2][3][12] = {
 	},
 };
 
+/* always convert to limited mode */
+static const u32 rgb2yuv_de3[3][12] = {
+	[DRM_COLOR_YCBCR_BT601] = {
+		0x0000837A, 0x0001021D, 0x00003221, 0x00000040,
+		0xFFFFB41C, 0xFFFF6B03, 0x0000E0E1, 0x00000200,
+		0x0000E0E1, 0xFFFF43B1, 0xFFFFDB6E, 0x00000200,
+	},
+	[DRM_COLOR_YCBCR_BT709] = {
+		0x00005D7C, 0x00013A7C, 0x00001FBF, 0x00000040,
+		0xFFFFCC78, 0xFFFF52A7, 0x0000E0E1, 0x00000200,
+		0x0000E0E1, 0xFFFF33BE, 0xFFFFEB61, 0x00000200,
+	},
+	[DRM_COLOR_YCBCR_BT2020] = {
+		0x00007384, 0x00012A21, 0x00001A13, 0x00000040,
+		0xFFFFC133, 0xFFFF5DEC, 0x0000E0E1, 0x00000200,
+		0x0000E0E1, 0xFFFF3135, 0xFFFFEDEA, 0x00000200,
+	},
+};
+
+/* always convert to limited mode */
+static const u32 yuv2yuv_de3[2][3][3][12] = {
+	[DRM_COLOR_YCBCR_LIMITED_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			[DRM_COLOR_YCBCR_BT601] = {
+				0x00020000, 0x00000000, 0x00000000, 0x00000000,
+				0x00000000, 0x00020000, 0x00000000, 0x00000000,
+				0x00000000, 0x00000000, 0x00020000, 0x00000000,
+			},
+			[DRM_COLOR_YCBCR_BT709] = {
+				0x00020000, 0xFFFFC4D7, 0xFFFF9589, 0xFFC00040,
+				0x00000000, 0x0002098B, 0x00003AAF, 0xFE000200,
+				0x00000000, 0x0000266D, 0x00020CF8, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT2020] = {
+				0x00020000, 0xFFFFBFCE, 0xFFFFC5FF, 0xFFC00040,
+				0x00000000, 0x00020521, 0x00001F89, 0xFE000200,
+				0x00000000, 0x00002C87, 0x00020F07, 0xFE000200,
+			},
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			[DRM_COLOR_YCBCR_BT601] = {
+				0x00020000, 0x000032D9, 0x00006226, 0xFFC00040,
+				0x00000000, 0x0001FACE, 0xFFFFC759, 0xFE000200,
+				0x00000000, 0xFFFFDAE7, 0x0001F780, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT709] = {
+				0x00020000, 0x00000000, 0x00000000, 0x00000000,
+				0x00000000, 0x00020000, 0x00000000, 0x00000000,
+				0x00000000, 0x00000000, 0x00020000, 0x00000000,
+			},
+			[DRM_COLOR_YCBCR_BT2020] = {
+				0x00020000, 0xFFFFF782, 0x00003036, 0xFFC00040,
+				0x00000000, 0x0001FD99, 0xFFFFE5CA, 0xFE000200,
+				0x00000000, 0x000005E4, 0x0002015A, 0xFE000200,
+			},
+		},
+		[DRM_COLOR_YCBCR_BT2020] = {
+			[DRM_COLOR_YCBCR_BT601] = {
+				0x00020000, 0x00003B03, 0x000034D2, 0xFFC00040,
+				0x00000000, 0x0001FD8C, 0xFFFFE183, 0xFE000200,
+				0x00000000, 0xFFFFD4F3, 0x0001F3FA, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT709] = {
+				0x00020000, 0x00000916, 0xFFFFD061, 0xFFC00040,
+				0x00000000, 0x0002021C, 0x00001A40, 0xFE000200,
+				0x00000000, 0xFFFFFA19, 0x0001FE5A, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT2020] = {
+				0x00020000, 0x00000000, 0x00000000, 0x00000000,
+				0x00000000, 0x00020000, 0x00000000, 0x00000000,
+				0x00000000, 0x00000000, 0x00020000, 0x00000000,
+			},
+		},
+	},
+	[DRM_COLOR_YCBCR_FULL_RANGE] = {
+		[DRM_COLOR_YCBCR_BT601] = {
+			[DRM_COLOR_YCBCR_BT601] = {
+				0x0001B7B8, 0x00000000, 0x00000000, 0x00000040,
+				0x00000000, 0x0001C1C2, 0x00000000, 0xFE000200,
+				0x00000000, 0x00000000, 0x0001C1C2, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT709] = {
+				0x0001B7B8, 0xFFFFCC08, 0xFFFFA27B, 0x00000040,
+				0x00000000, 0x0001CA24, 0x0000338D, 0xFE000200,
+				0x00000000, 0x000021C1, 0x0001CD26, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT2020] = {
+				0x0001B7B8, 0xFFFFC79C, 0xFFFFCD0C, 0x00000040,
+				0x00000000, 0x0001C643, 0x00001BB4, 0xFE000200,
+				0x00000000, 0x0000271D, 0x0001CEF5, 0xFE000200,
+			},
+		},
+		[DRM_COLOR_YCBCR_BT709] = {
+			[DRM_COLOR_YCBCR_BT601] = {
+				0x0001B7B8, 0x00002CAB, 0x00005638, 0x00000040,
+				0x00000000, 0x0001BD32, 0xFFFFCE3C, 0xFE000200,
+				0x00000000, 0xFFFFDF6A, 0x0001BA4A, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT709] = {
+				0x0001B7B8, 0x00000000, 0x00000000, 0x00000040,
+				0x00000000, 0x0001C1C2, 0x00000000, 0xFE000200,
+				0x00000000, 0x00000000, 0x0001C1C2, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT2020] = {
+				0x0001B7B8, 0xFFFFF88A, 0x00002A5A, 0x00000040,
+				0x00000000, 0x0001BFA5, 0xFFFFE8FA, 0xFE000200,
+				0x00000000, 0x0000052D, 0x0001C2F1, 0xFE000200,
+			},
+		},
+		[DRM_COLOR_YCBCR_BT2020] = {
+			[DRM_COLOR_YCBCR_BT601] = {
+				0x0001B7B8, 0x000033D6, 0x00002E66, 0x00000040,
+				0x00000000, 0x0001BF9A, 0xFFFFE538, 0xFE000200,
+				0x00000000, 0xFFFFDA2F, 0x0001B732, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT709] = {
+				0x0001B7B8, 0x000007FB, 0xFFFFD62B, 0x00000040,
+				0x00000000, 0x0001C39D, 0x0000170F, 0xFE000200,
+				0x00000000, 0xFFFFFAD1, 0x0001C04F, 0xFE000200,
+			},
+			[DRM_COLOR_YCBCR_BT2020] = {
+				0x0001B7B8, 0x00000000, 0x00000000, 0x00000040,
+				0x00000000, 0x0001C1C2, 0x00000000, 0xFE000200,
+				0x00000000, 0x00000000, 0x0001C1C2, 0xFE000200,
+			},
+		},
+	},
+};
+
 static void sun8i_csc_setup(struct regmap *map, u32 base,
 			    enum format_type fmt_type,
 			    enum drm_color_encoding encoding,
@@ -148,12 +279,27 @@ static void sun8i_csc_setup(struct regmap *map, u32 base,
 	regmap_write(map, SUN8I_CSC_CTRL(base), val);
 }
 
+static const u32 *sun8i_csc_get_de3_yuv_table(enum drm_color_encoding in_enc,
+					      enum drm_color_range in_range,
+					      u32 out_format,
+					      enum drm_color_encoding out_enc)
+{
+	if (out_format == MEDIA_BUS_FMT_RGB888_1X24)
+		return yuv2rgb_de3[in_range][in_enc];
+
+	/* check for identity transformation */
+	if (in_range == DRM_COLOR_YCBCR_LIMITED_RANGE && out_enc == in_enc)
+		return NULL;
+
+	return yuv2yuv_de3[in_range][in_enc][out_enc];
+}
+
 static void sun8i_de3_ccsc_setup(struct sunxi_engine *engine, int layer,
 				 enum format_type fmt_type,
 				 enum drm_color_encoding encoding,
 				 enum drm_color_range range)
 {
-	u32 addr, val, mask;
+	u32 addr, val = 0, mask;
 	struct regmap *map;
 	const u32 *table;
 	int i;
@@ -164,14 +310,28 @@ static void sun8i_de3_ccsc_setup(struct sunxi_engine *engine, int layer,
 
 	switch (fmt_type) {
 	case FORMAT_TYPE_RGB:
-		val = 0;
+		if (engine->format == MEDIA_BUS_FMT_RGB888_1X24)
+			break;
+		val = mask;
+		addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0);
+		regmap_bulk_write(map, addr, rgb2yuv_de3[engine->encoding], 12);
 		break;
 	case FORMAT_TYPE_YUV:
+		table = sun8i_csc_get_de3_yuv_table(encoding, range,
+						    engine->format,
+						    engine->encoding);
+		if (!table)
+			break;
 		val = mask;
 		addr = SUN50I_MIXER_BLEND_CSC_COEFF(DE3_BLD_BASE, layer, 0);
 		regmap_bulk_write(map, addr, table, 12);
 		break;
 	case FORMAT_TYPE_YVU:
+		table = sun8i_csc_get_de3_yuv_table(encoding, range,
+						    engine->format,
+						    engine->encoding);
+		if (!table)
+			table = yuv2yuv_de3[range][encoding][encoding];
 		val = mask;
 		for (i = 0; i < 12; i++) {
 			if ((i & 3) == 1)
-- 
2.46.1

[PATCH v5 11/26] drm: sun4i: de3: add YUV support to the TCON

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Account for U/V channel subsampling by reducing the dot clock and
resolution with a divider in the DE3 timing controller if a YUV format
is selected.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index a1a2c845ade0c..e39926e9f0b5d 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -598,14 +598,26 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 static void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
 				 const struct drm_display_mode *mode)
 {
-	unsigned int bp, hsync, vsync, vtotal;
+	unsigned int bp, hsync, vsync, vtotal, div;
+	struct sun4i_crtc *scrtc = tcon->crtc;
+	struct sunxi_engine *engine = scrtc->engine;
 	u8 clk_delay;
 	u32 val;
 
 	WARN_ON(!tcon->quirks->has_channel_1);
 
+	switch (engine->format) {
+	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+		div = 2;
+		break;
+	default:
+		div = 1;
+		break;
+	}
+
 	/* Configure the dot clock */
-	clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
+	clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000 / div);
 
 	/* Adjust clock delay */
 	clk_delay = sun4i_tcon_get_clk_delay(mode, 1);
@@ -624,17 +636,17 @@ static void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
 
 	/* Set the input resolution */
 	regmap_write(tcon->regs, SUN4I_TCON1_BASIC0_REG,
-		     SUN4I_TCON1_BASIC0_X(mode->crtc_hdisplay) |
+		     SUN4I_TCON1_BASIC0_X(mode->crtc_hdisplay / div) |
 		     SUN4I_TCON1_BASIC0_Y(mode->crtc_vdisplay));
 
 	/* Set the upscaling resolution */
 	regmap_write(tcon->regs, SUN4I_TCON1_BASIC1_REG,
-		     SUN4I_TCON1_BASIC1_X(mode->crtc_hdisplay) |
+		     SUN4I_TCON1_BASIC1_X(mode->crtc_hdisplay / div) |
 		     SUN4I_TCON1_BASIC1_Y(mode->crtc_vdisplay));
 
 	/* Set the output resolution */
 	regmap_write(tcon->regs, SUN4I_TCON1_BASIC2_REG,
-		     SUN4I_TCON1_BASIC2_X(mode->crtc_hdisplay) |
+		     SUN4I_TCON1_BASIC2_X(mode->crtc_hdisplay / div) |
 		     SUN4I_TCON1_BASIC2_Y(mode->crtc_vdisplay));
 
 	/* Set horizontal display timings */
@@ -642,8 +654,8 @@ static void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
 	DRM_DEBUG_DRIVER("Setting horizontal total %d, backporch %d\n",
 			 mode->htotal, bp);
 	regmap_write(tcon->regs, SUN4I_TCON1_BASIC3_REG,
-		     SUN4I_TCON1_BASIC3_H_TOTAL(mode->crtc_htotal) |
-		     SUN4I_TCON1_BASIC3_H_BACKPORCH(bp));
+		     SUN4I_TCON1_BASIC3_H_TOTAL(mode->crtc_htotal / div) |
+		     SUN4I_TCON1_BASIC3_H_BACKPORCH(bp / div));
 
 	bp = mode->crtc_vtotal - mode->crtc_vsync_start;
 	DRM_DEBUG_DRIVER("Setting vertical total %d, backporch %d\n",
-- 
2.46.1

[PATCH v5 12/26] drm: sun4i: support YUV formats in VI scaler

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Now that YUV formats are available, enable support in the VI scaler.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>

Changelog v4..v5:
- Add commit description
---
 drivers/gpu/drm/sun4i/sun8i_vi_scaler.c | 85 +++++++++++++++++--------
 1 file changed, 58 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
index 7ba75011adf9f..2e49a6e5f1f1c 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
@@ -843,6 +843,11 @@ static u32 sun8i_vi_scaler_base(struct sun8i_mixer *mixer, int channel)
 		       DE2_VI_SCALER_UNIT_SIZE * channel;
 }
 
+static bool sun8i_vi_scaler_is_vi_plane(struct sun8i_mixer *mixer, int channel)
+{
+	return true;
+}
+
 static int sun8i_vi_scaler_coef_index(unsigned int step)
 {
 	unsigned int scale, int_part, float_part;
@@ -867,44 +872,65 @@ static int sun8i_vi_scaler_coef_index(unsigned int step)
 	}
 }
 
-static void sun8i_vi_scaler_set_coeff(struct regmap *map, u32 base,
-				      u32 hstep, u32 vstep,
-				      const struct drm_format_info *format)
+static void sun8i_vi_scaler_set_coeff_vi(struct regmap *map, u32 base,
+					 u32 hstep, u32 vstep,
+					 const struct drm_format_info *format)
 {
 	const u32 *ch_left, *ch_right, *cy;
-	int offset, i;
+	int offset;
 
-	if (format->hsub == 1 && format->vsub == 1) {
-		ch_left = lan3coefftab32_left;
-		ch_right = lan3coefftab32_right;
-		cy = lan2coefftab32;
-	} else {
+	if (format->is_yuv) {
 		ch_left = bicubic8coefftab32_left;
 		ch_right = bicubic8coefftab32_right;
 		cy = bicubic4coefftab32;
+	} else {
+		ch_left = lan3coefftab32_left;
+		ch_right = lan3coefftab32_right;
+		cy = lan2coefftab32;
 	}
 
 	offset = sun8i_vi_scaler_coef_index(hstep) *
 			SUN8I_VI_SCALER_COEFF_COUNT;
-	for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) {
-		regmap_write(map, SUN8I_SCALER_VSU_YHCOEFF0(base, i),
-			     lan3coefftab32_left[offset + i]);
-		regmap_write(map, SUN8I_SCALER_VSU_YHCOEFF1(base, i),
-			     lan3coefftab32_right[offset + i]);
-		regmap_write(map, SUN8I_SCALER_VSU_CHCOEFF0(base, i),
-			     ch_left[offset + i]);
-		regmap_write(map, SUN8I_SCALER_VSU_CHCOEFF1(base, i),
-			     ch_right[offset + i]);
-	}
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_YHCOEFF0(base, 0),
+			  &lan3coefftab32_left[offset],
+			  SUN8I_VI_SCALER_COEFF_COUNT);
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_YHCOEFF1(base, 0),
+			  &lan3coefftab32_right[offset],
+			  SUN8I_VI_SCALER_COEFF_COUNT);
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_CHCOEFF0(base, 0),
+			  &ch_left[offset], SUN8I_VI_SCALER_COEFF_COUNT);
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_CHCOEFF1(base, 0),
+			  &ch_right[offset], SUN8I_VI_SCALER_COEFF_COUNT);
 
 	offset = sun8i_vi_scaler_coef_index(hstep) *
 			SUN8I_VI_SCALER_COEFF_COUNT;
-	for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) {
-		regmap_write(map, SUN8I_SCALER_VSU_YVCOEFF(base, i),
-			     lan2coefftab32[offset + i]);
-		regmap_write(map, SUN8I_SCALER_VSU_CVCOEFF(base, i),
-			     cy[offset + i]);
-	}
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_YVCOEFF(base, 0),
+			  &lan2coefftab32[offset], SUN8I_VI_SCALER_COEFF_COUNT);
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_CVCOEFF(base, 0),
+			  &cy[offset], SUN8I_VI_SCALER_COEFF_COUNT);
+}
+
+static void sun8i_vi_scaler_set_coeff_ui(struct regmap *map, u32 base,
+					 u32 hstep, u32 vstep,
+					 const struct drm_format_info *format)
+{
+	const u32 *table;
+	int offset;
+
+	offset = sun8i_vi_scaler_coef_index(hstep) *
+			SUN8I_VI_SCALER_COEFF_COUNT;
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_YHCOEFF0(base, 0),
+			  &lan2coefftab32[offset], SUN8I_VI_SCALER_COEFF_COUNT);
+	offset = sun8i_vi_scaler_coef_index(vstep) *
+			SUN8I_VI_SCALER_COEFF_COUNT;
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_YVCOEFF(base, 0),
+			  &lan2coefftab32[offset], SUN8I_VI_SCALER_COEFF_COUNT);
+
+	table = format->is_yuv ? bicubic4coefftab32 : lan2coefftab32;
+	offset = sun8i_vi_scaler_coef_index(hstep) *
+			SUN8I_VI_SCALER_COEFF_COUNT;
+	regmap_bulk_write(map, SUN8I_SCALER_VSU_CHCOEFF0(base, 0),
+			  &table[offset], SUN8I_VI_SCALER_COEFF_COUNT);
 }
 
 void sun8i_vi_scaler_enable(struct sun8i_mixer *mixer, int layer, bool enable)
@@ -994,6 +1020,11 @@ void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
 		     SUN8I_SCALER_VSU_CHPHASE(base), chphase);
 	regmap_write(mixer->engine.regs,
 		     SUN8I_SCALER_VSU_CVPHASE(base), cvphase);
-	sun8i_vi_scaler_set_coeff(mixer->engine.regs, base,
-				  hscale, vscale, format);
+
+	if (sun8i_vi_scaler_is_vi_plane(mixer, layer))
+		sun8i_vi_scaler_set_coeff_vi(mixer->engine.regs, base,
+					     hscale, vscale, format);
+	else
+		sun8i_vi_scaler_set_coeff_ui(mixer->engine.regs, base,
+					     hscale, vscale, format);
 }
-- 
2.46.1

[PATCH v5 13/26] drm: sun4i: de2/de3: add mixer version enum

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The Allwinner DE2 and DE3 display engine mixers are currently identified
by a simple boolean flag. This will not scale to support additional DE
variants.

Convert the boolean flag to an enum.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c       |  2 +-
 drivers/gpu/drm/sun4i/sun8i_mixer.c     | 14 ++++++++++++--
 drivers/gpu/drm/sun4i/sun8i_mixer.h     | 11 ++++++++---
 drivers/gpu/drm/sun4i/sun8i_ui_scaler.c |  2 +-
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c  |  8 ++++----
 drivers/gpu/drm/sun4i/sun8i_vi_scaler.c |  4 ++--
 6 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index e12a81fa91083..2d5a2cf7cba24 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -365,7 +365,7 @@ void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
 {
 	u32 base;
 
-	if (mixer->cfg->is_de3) {
+	if (mixer->cfg->de_type == sun8i_mixer_de3) {
 		sun8i_de3_ccsc_setup(&mixer->engine, layer,
 				     fmt_type, encoding, range);
 		return;
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index a50c583852edf..16e018aa4aae9 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -584,7 +584,7 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 	base = sun8i_blender_base(mixer);
 
 	/* Reset registers and disable unused sub-engines */
-	if (mixer->cfg->is_de3) {
+	if (mixer->cfg->de_type == sun8i_mixer_de3) {
 		for (i = 0; i < DE3_MIXER_UNIT_SIZE; i += 4)
 			regmap_write(mixer->engine.regs, i, 0);
 
@@ -675,6 +675,7 @@ static void sun8i_mixer_remove(struct platform_device *pdev)
 
 static const struct sun8i_mixer_cfg sun8i_a83t_mixer0_cfg = {
 	.ccsc		= CCSC_MIXER0_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.scaler_mask	= 0xf,
 	.scanline_yuv	= 2048,
 	.ui_num		= 3,
@@ -683,6 +684,7 @@ static const struct sun8i_mixer_cfg sun8i_a83t_mixer0_cfg = {
 
 static const struct sun8i_mixer_cfg sun8i_a83t_mixer1_cfg = {
 	.ccsc		= CCSC_MIXER1_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.scaler_mask	= 0x3,
 	.scanline_yuv	= 2048,
 	.ui_num		= 1,
@@ -691,6 +693,7 @@ static const struct sun8i_mixer_cfg sun8i_a83t_mixer1_cfg = {
 
 static const struct sun8i_mixer_cfg sun8i_h3_mixer0_cfg = {
 	.ccsc		= CCSC_MIXER0_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.mod_rate	= 432000000,
 	.scaler_mask	= 0xf,
 	.scanline_yuv	= 2048,
@@ -700,6 +703,7 @@ static const struct sun8i_mixer_cfg sun8i_h3_mixer0_cfg = {
 
 static const struct sun8i_mixer_cfg sun8i_r40_mixer0_cfg = {
 	.ccsc		= CCSC_MIXER0_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.mod_rate	= 297000000,
 	.scaler_mask	= 0xf,
 	.scanline_yuv	= 2048,
@@ -709,6 +713,7 @@ static const struct sun8i_mixer_cfg sun8i_r40_mixer0_cfg = {
 
 static const struct sun8i_mixer_cfg sun8i_r40_mixer1_cfg = {
 	.ccsc		= CCSC_MIXER1_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.mod_rate	= 297000000,
 	.scaler_mask	= 0x3,
 	.scanline_yuv	= 2048,
@@ -717,6 +722,7 @@ static const struct sun8i_mixer_cfg sun8i_r40_mixer1_cfg = {
 };
 
 static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
+	.de_type = sun8i_mixer_de2,
 	.vi_num = 2,
 	.ui_num = 1,
 	.scaler_mask = 0x3,
@@ -727,6 +733,7 @@ static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
 
 static const struct sun8i_mixer_cfg sun20i_d1_mixer0_cfg = {
 	.ccsc		= CCSC_D1_MIXER0_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.mod_rate	= 297000000,
 	.scaler_mask	= 0x3,
 	.scanline_yuv	= 2048,
@@ -736,6 +743,7 @@ static const struct sun8i_mixer_cfg sun20i_d1_mixer0_cfg = {
 
 static const struct sun8i_mixer_cfg sun20i_d1_mixer1_cfg = {
 	.ccsc		= CCSC_MIXER1_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.mod_rate	= 297000000,
 	.scaler_mask	= 0x1,
 	.scanline_yuv	= 1024,
@@ -745,6 +753,7 @@ static const struct sun8i_mixer_cfg sun20i_d1_mixer1_cfg = {
 
 static const struct sun8i_mixer_cfg sun50i_a64_mixer0_cfg = {
 	.ccsc		= CCSC_MIXER0_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.mod_rate	= 297000000,
 	.scaler_mask	= 0xf,
 	.scanline_yuv	= 4096,
@@ -754,6 +763,7 @@ static const struct sun8i_mixer_cfg sun50i_a64_mixer0_cfg = {
 
 static const struct sun8i_mixer_cfg sun50i_a64_mixer1_cfg = {
 	.ccsc		= CCSC_MIXER1_LAYOUT,
+	.de_type	= sun8i_mixer_de2,
 	.mod_rate	= 297000000,
 	.scaler_mask	= 0x3,
 	.scanline_yuv	= 2048,
@@ -763,7 +773,7 @@ static const struct sun8i_mixer_cfg sun50i_a64_mixer1_cfg = {
 
 static const struct sun8i_mixer_cfg sun50i_h6_mixer0_cfg = {
 	.ccsc		= CCSC_MIXER0_LAYOUT,
-	.is_de3		= true,
+	.de_type	= sun8i_mixer_de3,
 	.has_formatter	= 1,
 	.mod_rate	= 600000000,
 	.scaler_mask	= 0xf,
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 8417b8fef2e1f..82956cb97cfd9 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -151,6 +151,11 @@ enum {
 	CCSC_D1_MIXER0_LAYOUT,
 };
 
+enum sun8i_mixer_type {
+	sun8i_mixer_de2,
+	sun8i_mixer_de3,
+};
+
 /**
  * struct sun8i_mixer_cfg - mixer HW configuration
  * @vi_num: number of VI channels
@@ -172,7 +177,7 @@ struct sun8i_mixer_cfg {
 	int		scaler_mask;
 	int		ccsc;
 	unsigned long	mod_rate;
-	unsigned int	is_de3 : 1;
+	unsigned int	de_type;
 	unsigned int    has_formatter : 1;
 	unsigned int	scanline_yuv;
 };
@@ -216,13 +221,13 @@ engine_to_sun8i_mixer(struct sunxi_engine *engine)
 static inline u32
 sun8i_blender_base(struct sun8i_mixer *mixer)
 {
-	return mixer->cfg->is_de3 ? DE3_BLD_BASE : DE2_BLD_BASE;
+	return mixer->cfg->de_type == sun8i_mixer_de3 ? DE3_BLD_BASE : DE2_BLD_BASE;
 }
 
 static inline u32
 sun8i_channel_base(struct sun8i_mixer *mixer, int channel)
 {
-	if (mixer->cfg->is_de3)
+	if (mixer->cfg->de_type == sun8i_mixer_de3)
 		return DE3_CH_BASE + channel * DE3_CH_SIZE;
 	else
 		return DE2_CH_BASE + channel * DE2_CH_SIZE;
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
index ae0806bccac7f..504ffa0971a4f 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_scaler.c
@@ -93,7 +93,7 @@ static u32 sun8i_ui_scaler_base(struct sun8i_mixer *mixer, int channel)
 {
 	int vi_num = mixer->cfg->vi_num;
 
-	if (mixer->cfg->is_de3)
+	if (mixer->cfg->de_type == sun8i_mixer_de3)
 		return DE3_VI_SCALER_UNIT_BASE +
 		       DE3_VI_SCALER_UNIT_SIZE * vi_num +
 		       DE3_UI_SCALER_UNIT_SIZE * (channel - vi_num);
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 3c657b069d1f4..4647e9bcccaa7 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -25,7 +25,7 @@ static void sun8i_vi_layer_update_alpha(struct sun8i_mixer *mixer, int channel,
 
 	ch_base = sun8i_channel_base(mixer, channel);
 
-	if (mixer->cfg->is_de3) {
+	if (mixer->cfg->de_type >= sun8i_mixer_de3) {
 		mask = SUN50I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA_MASK |
 		       SUN50I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA_MODE_MASK;
 		val = SUN50I_MIXER_CHAN_VI_LAYER_ATTR_ALPHA
@@ -483,7 +483,7 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 	layer->channel = index;
 	layer->overlay = 0;
 
-	if (mixer->cfg->is_de3) {
+	if (mixer->cfg->de_type >= sun8i_mixer_de3) {
 		formats = sun8i_vi_layer_de3_formats;
 		format_count = ARRAY_SIZE(sun8i_vi_layer_de3_formats);
 	} else {
@@ -507,7 +507,7 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 
 	plane_cnt = mixer->cfg->ui_num + mixer->cfg->vi_num;
 
-	if (mixer->cfg->vi_num == 1 || mixer->cfg->is_de3) {
+	if (mixer->cfg->vi_num == 1 || mixer->cfg->de_type >= sun8i_mixer_de3) {
 		ret = drm_plane_create_alpha_property(&layer->plane);
 		if (ret) {
 			dev_err(drm->dev, "Couldn't add alpha property\n");
@@ -524,7 +524,7 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 
 	supported_encodings = BIT(DRM_COLOR_YCBCR_BT601) |
 			      BIT(DRM_COLOR_YCBCR_BT709);
-	if (mixer->cfg->is_de3)
+	if (mixer->cfg->de_type >= sun8i_mixer_de3)
 		supported_encodings |= BIT(DRM_COLOR_YCBCR_BT2020);
 
 	supported_ranges = BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
index 2e49a6e5f1f1c..aa346c3beb303 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
@@ -835,7 +835,7 @@ static const u32 bicubic4coefftab32[480] = {
 
 static u32 sun8i_vi_scaler_base(struct sun8i_mixer *mixer, int channel)
 {
-	if (mixer->cfg->is_de3)
+	if (mixer->cfg->de_type == sun8i_mixer_de3)
 		return DE3_VI_SCALER_UNIT_BASE +
 		       DE3_VI_SCALER_UNIT_SIZE * channel;
 	else
@@ -982,7 +982,7 @@ void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
 		cvphase = vphase;
 	}
 
-	if (mixer->cfg->is_de3) {
+	if (mixer->cfg->de_type >= sun8i_mixer_de3) {
 		u32 val;
 
 		if (format->hsub == 1 && format->vsub == 1)
-- 
2.46.1

[PATCH v5 14/26] drm: sun4i: de2/de3: refactor mixer initialisation

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Now that the DE variant can be selected by enum, take the oppportunity
to factor out some common initialisation code to a separate function.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>

---
Changelog v1..v2:
- Combine base register allocation and initialisation in sun8i_mixer_init
- Whitespace fix

Changelog v4..v5:
- Remove trailing whitespace
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c | 64 +++++++++++++++--------------
 1 file changed, 34 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 16e018aa4aae9..18745af089545 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -468,6 +468,38 @@ static int sun8i_mixer_of_get_id(struct device_node *node)
 	return of_ep.id;
 }
 
+static void sun8i_mixer_init(struct sun8i_mixer *mixer)
+{
+	unsigned int base = sun8i_blender_base(mixer);
+	int plane_cnt, i;
+
+	/* Enable the mixer */
+	regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_CTL,
+		     SUN8I_MIXER_GLOBAL_CTL_RT_EN);
+
+	/* Set background color to black */
+	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_BKCOLOR(base),
+		     SUN8I_MIXER_BLEND_COLOR_BLACK);
+
+	/*
+	 * Set fill color of bottom plane to black. Generally not needed
+	 * except when VI plane is at bottom (zpos = 0) and enabled.
+	 */
+	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
+		     SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0));
+	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_ATTR_FCOLOR(base, 0),
+		     SUN8I_MIXER_BLEND_COLOR_BLACK);
+
+	plane_cnt = mixer->cfg->vi_num + mixer->cfg->ui_num;
+	for (i = 0; i < plane_cnt; i++)
+		regmap_write(mixer->engine.regs,
+			     SUN8I_MIXER_BLEND_MODE(base, i),
+			     SUN8I_MIXER_BLEND_MODE_DEF);
+
+	regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
+			   SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, 0);
+}
+
 static int sun8i_mixer_bind(struct device *dev, struct device *master,
 			      void *data)
 {
@@ -476,8 +508,6 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 	struct sun4i_drv *drv = drm->dev_private;
 	struct sun8i_mixer *mixer;
 	void __iomem *regs;
-	unsigned int base;
-	int plane_cnt;
 	int i, ret;
 
 	/*
@@ -581,8 +611,6 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 
 	list_add_tail(&mixer->engine.list, &drv->engine_list);
 
-	base = sun8i_blender_base(mixer);
-
 	/* Reset registers and disable unused sub-engines */
 	if (mixer->cfg->de_type == sun8i_mixer_de3) {
 		for (i = 0; i < DE3_MIXER_UNIT_SIZE; i += 4)
@@ -598,7 +626,7 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 		regmap_write(mixer->engine.regs, SUN50I_MIXER_FMT_EN, 0);
 		regmap_write(mixer->engine.regs, SUN50I_MIXER_CDC0_EN, 0);
 		regmap_write(mixer->engine.regs, SUN50I_MIXER_CDC1_EN, 0);
-	} else {
+	} else if (mixer->cfg->de_type == sun8i_mixer_de2) {
 		for (i = 0; i < DE2_MIXER_UNIT_SIZE; i += 4)
 			regmap_write(mixer->engine.regs, i, 0);
 
@@ -611,31 +639,7 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 		regmap_write(mixer->engine.regs, SUN8I_MIXER_DCSC_EN, 0);
 	}
 
-	/* Enable the mixer */
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_CTL,
-		     SUN8I_MIXER_GLOBAL_CTL_RT_EN);
-
-	/* Set background color to black */
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_BKCOLOR(base),
-		     SUN8I_MIXER_BLEND_COLOR_BLACK);
-
-	/*
-	 * Set fill color of bottom plane to black. Generally not needed
-	 * except when VI plane is at bottom (zpos = 0) and enabled.
-	 */
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
-		     SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0));
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_ATTR_FCOLOR(base, 0),
-		     SUN8I_MIXER_BLEND_COLOR_BLACK);
-
-	plane_cnt = mixer->cfg->vi_num + mixer->cfg->ui_num;
-	for (i = 0; i < plane_cnt; i++)
-		regmap_write(mixer->engine.regs,
-			     SUN8I_MIXER_BLEND_MODE(base, i),
-			     SUN8I_MIXER_BLEND_MODE_DEF);
-
-	regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
-			   SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, 0);
+	sun8i_mixer_init(mixer);
 
 	return 0;
 
-- 
2.46.1

[PATCH v5 15/26] drm: sun4i: vi_scaler refactor vi_scaler enablement

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

If the video scaler is required, then it is obligatory to set the
relevant register to enable it, so move this to the
sun8i_vi_scaler_setup() function.

This simplifies the alternate case (scaler not required) so replace the
vi_scaler_enable() function with a vi_scaler_disable() function.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c  |  3 +--
 drivers/gpu/drm/sun4i/sun8i_vi_scaler.c | 21 +++++++++++----------
 drivers/gpu/drm/sun4i/sun8i_vi_scaler.h |  2 +-
 3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 4647e9bcccaa7..e348fd0a3d81c 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -156,10 +156,9 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 		sun8i_vi_scaler_setup(mixer, channel, src_w, src_h, dst_w,
 				      dst_h, hscale, vscale, hphase, vphase,
 				      format);
-		sun8i_vi_scaler_enable(mixer, channel, true);
 	} else {
 		DRM_DEBUG_DRIVER("HW scaling is not needed\n");
-		sun8i_vi_scaler_enable(mixer, channel, false);
+		sun8i_vi_scaler_disable(mixer, channel);
 	}
 
 	regmap_write(mixer->engine.regs,
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
index aa346c3beb303..e7242301b312c 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
@@ -933,20 +933,13 @@ static void sun8i_vi_scaler_set_coeff_ui(struct regmap *map, u32 base,
 			  &table[offset], SUN8I_VI_SCALER_COEFF_COUNT);
 }
 
-void sun8i_vi_scaler_enable(struct sun8i_mixer *mixer, int layer, bool enable)
+void sun8i_vi_scaler_disable(struct sun8i_mixer *mixer, int layer)
 {
-	u32 val, base;
+	u32 base;
 
 	base = sun8i_vi_scaler_base(mixer, layer);
 
-	if (enable)
-		val = SUN8I_SCALER_VSU_CTRL_EN |
-		      SUN8I_SCALER_VSU_CTRL_COEFF_RDY;
-	else
-		val = 0;
-
-	regmap_write(mixer->engine.regs,
-		     SUN8I_SCALER_VSU_CTRL(base), val);
+	regmap_write(mixer->engine.regs, SUN8I_SCALER_VSU_CTRL(base), 0);
 }
 
 void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
@@ -982,6 +975,9 @@ void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
 		cvphase = vphase;
 	}
 
+	regmap_write(mixer->engine.regs, SUN8I_SCALER_VSU_CTRL(base),
+		     SUN8I_SCALER_VSU_CTRL_EN);
+
 	if (mixer->cfg->de_type >= sun8i_mixer_de3) {
 		u32 val;
 
@@ -1027,4 +1023,9 @@ void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
 	else
 		sun8i_vi_scaler_set_coeff_ui(mixer->engine.regs, base,
 					     hscale, vscale, format);
+
+	if (mixer->cfg->de_type <= sun8i_mixer_de3)
+		regmap_write(mixer->engine.regs, SUN8I_SCALER_VSU_CTRL(base),
+			     SUN8I_SCALER_VSU_CTRL_EN |
+			     SUN8I_SCALER_VSU_CTRL_COEFF_RDY);
 }
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
index 68f6593b369ab..e801bc7a4189e 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.h
@@ -69,7 +69,7 @@
 #define SUN50I_SCALER_VSU_ANGLE_SHIFT(x)		(((x) << 16) & 0xF)
 #define SUN50I_SCALER_VSU_ANGLE_OFFSET(x)		((x) & 0xFF)
 
-void sun8i_vi_scaler_enable(struct sun8i_mixer *mixer, int layer, bool enable);
+void sun8i_vi_scaler_disable(struct sun8i_mixer *mixer, int layer);
 void sun8i_vi_scaler_setup(struct sun8i_mixer *mixer, int layer,
 			   u32 src_w, u32 src_h, u32 dst_w, u32 dst_h,
 			   u32 hscale, u32 vscale, u32 hphase, u32 vphase,
-- 
2.46.1

[PATCH v5 16/26] drm: sun4i: de2/de3: add generic blender register reference function

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The DE2 and DE3 engines have a blender register range within the
mixer engine register map, whereas the DE33 separates this out into
a separate display group.

Prepare for this by adding a function to look the blender reference up,
with a subsequent patch to add a conditional based on the DE type.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_mixer.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 82956cb97cfd9..75facc7d1fa66 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -224,6 +224,12 @@ sun8i_blender_base(struct sun8i_mixer *mixer)
 	return mixer->cfg->de_type == sun8i_mixer_de3 ? DE3_BLD_BASE : DE2_BLD_BASE;
 }
 
+static inline struct regmap *
+sun8i_blender_regmap(struct sun8i_mixer *mixer)
+{
+	return mixer->engine.regs;
+}
+
 static inline u32
 sun8i_channel_base(struct sun8i_mixer *mixer, int channel)
 {
-- 
2.46.1

[PATCH v5 17/26] drm: sun4i: de2/de3: use generic register reference function for layer configuration

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Use the new blender register lookup function where required in the layer
commit and update code.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>

---
Changelog v2..v3:
- Refactor for 6.11 layer init/modesetting changes
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c    | 5 +++--
 drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 7 +++++--
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 6 ++++--
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 18745af089545..600084286b39d 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -277,6 +277,7 @@ static void sun8i_mixer_commit(struct sunxi_engine *engine,
 {
 	struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
 	u32 bld_base = sun8i_blender_base(mixer);
+	struct regmap *bld_regs = sun8i_blender_regmap(mixer);
 	struct drm_plane_state *plane_state;
 	struct drm_plane *plane;
 	u32 route = 0, pipe_en = 0;
@@ -316,8 +317,8 @@ static void sun8i_mixer_commit(struct sunxi_engine *engine,
 		pipe_en |= SUN8I_MIXER_BLEND_PIPE_CTL_EN(zpos);
 	}
 
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_ROUTE(bld_base), route);
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
+	regmap_write(bld_regs, SUN8I_MIXER_BLEND_ROUTE(bld_base), route);
+	regmap_write(bld_regs, SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
 		     pipe_en | SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0));
 
 	regmap_write(engine->regs, SUN8I_MIXER_GLOBAL_DBUFF,
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index cb9b694fef101..7f1231cf0f012 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -24,6 +24,7 @@
 #include "sun8i_mixer.h"
 #include "sun8i_ui_layer.h"
 #include "sun8i_ui_scaler.h"
+#include "sun8i_vi_scaler.h"
 
 static void sun8i_ui_layer_update_alpha(struct sun8i_mixer *mixer, int channel,
 					int overlay, struct drm_plane *plane)
@@ -52,6 +53,7 @@ static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 {
 	struct drm_plane_state *state = plane->state;
 	u32 src_w, src_h, dst_w, dst_h;
+	struct regmap *bld_regs;
 	u32 bld_base, ch_base;
 	u32 outsize, insize;
 	u32 hphase, vphase;
@@ -60,6 +62,7 @@ static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 			 channel, overlay);
 
 	bld_base = sun8i_blender_base(mixer);
+	bld_regs = sun8i_blender_regmap(mixer);
 	ch_base = sun8i_channel_base(mixer, channel);
 
 	src_w = drm_rect_width(&state->src) >> 16;
@@ -104,10 +107,10 @@ static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 	DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n",
 			 state->dst.x1, state->dst.y1);
 	DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, dst_h);
-	regmap_write(mixer->engine.regs,
+	regmap_write(bld_regs,
 		     SUN8I_MIXER_BLEND_ATTR_COORD(bld_base, zpos),
 		     SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1));
-	regmap_write(mixer->engine.regs,
+	regmap_write(bld_regs,
 		     SUN8I_MIXER_BLEND_ATTR_INSIZE(bld_base, zpos),
 		     outsize);
 
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index e348fd0a3d81c..d19349eecc9de 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -55,6 +55,7 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 	struct drm_plane_state *state = plane->state;
 	const struct drm_format_info *format = state->fb->format;
 	u32 src_w, src_h, dst_w, dst_h;
+	struct regmap *bld_regs;
 	u32 bld_base, ch_base;
 	u32 outsize, insize;
 	u32 hphase, vphase;
@@ -66,6 +67,7 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 			 channel, overlay);
 
 	bld_base = sun8i_blender_base(mixer);
+	bld_regs = sun8i_blender_regmap(mixer);
 	ch_base = sun8i_channel_base(mixer, channel);
 
 	src_w = drm_rect_width(&state->src) >> 16;
@@ -182,10 +184,10 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 	DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n",
 			 state->dst.x1, state->dst.y1);
 	DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, dst_h);
-	regmap_write(mixer->engine.regs,
+	regmap_write(bld_regs,
 		     SUN8I_MIXER_BLEND_ATTR_COORD(bld_base, zpos),
 		     SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1));
-	regmap_write(mixer->engine.regs,
+	regmap_write(bld_regs,
 		     SUN8I_MIXER_BLEND_ATTR_INSIZE(bld_base, zpos),
 		     outsize);
 
-- 
2.46.1

[PATCH v5 18/26] drm: sun4i: de3: Implement AFBC support

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Buffers, compressed with AFBC, are supported by the DE3 and above, and
are generally more efficient for memory transfers. Add support for them.

Currently it's implemented only for VI layers, but vendor code and
documentation suggest UI layers can have them too. However, I haven't
observed any SoC with such feature.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>

---
Changelog v4..v5:
- Correct strict mode warnings from checkpatch.pl
---
 drivers/gpu/drm/sun4i/Makefile         |   2 +-
 drivers/gpu/drm/sun4i/sun50i_afbc.c    | 250 +++++++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun50i_afbc.h    |  87 +++++++++
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c |  84 +++++++--
 4 files changed, 409 insertions(+), 14 deletions(-)
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.c
 create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.h

diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 3f516329f51ee..78290f1660fbd 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -17,7 +17,7 @@ sun8i-drm-hdmi-y		+= sun8i_hdmi_phy_clk.o
 sun8i-mixer-y			+= sun8i_mixer.o sun8i_ui_layer.o \
 				   sun8i_vi_layer.o sun8i_ui_scaler.o \
 				   sun8i_vi_scaler.o sun8i_csc.o \
-				   sun50i_fmt.o
+				   sun50i_fmt.o sun50i_afbc.o
 
 sun4i-tcon-y			+= sun4i_crtc.o
 sun4i-tcon-y			+= sun4i_tcon_dclk.o
diff --git a/drivers/gpu/drm/sun4i/sun50i_afbc.c b/drivers/gpu/drm/sun4i/sun50i_afbc.c
new file mode 100644
index 0000000000000..b55e1c5533714
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun50i_afbc.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Jernej Skrabec <jernej.skrabec@gmail.com>
+ */
+
+#include <drm/drm_blend.h>
+#include <drm/drm_fb_dma_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_plane.h>
+#include <uapi/drm/drm_fourcc.h>
+
+#include "sun50i_afbc.h"
+#include "sun8i_mixer.h"
+
+static u32 sun50i_afbc_get_base(struct sun8i_mixer *mixer, unsigned int channel)
+{
+	u32 base = sun8i_channel_base(mixer, channel);
+
+	if (mixer->cfg->de_type == sun8i_mixer_de3)
+		return base + SUN50I_AFBC_CH_OFFSET;
+
+	return base + 0x4000;
+}
+
+bool sun50i_afbc_format_mod_supported(struct sun8i_mixer *mixer,
+				      u32 format, u64 modifier)
+{
+	u64 mode;
+
+	if (modifier == DRM_FORMAT_MOD_INVALID)
+		return false;
+
+	if (modifier == DRM_FORMAT_MOD_LINEAR) {
+		if (format == DRM_FORMAT_YUV420_8BIT ||
+		    format == DRM_FORMAT_YUV420_10BIT ||
+		    format == DRM_FORMAT_Y210)
+			return false;
+		return true;
+	}
+
+	if (mixer->cfg->de_type == sun8i_mixer_de2)
+		return false;
+
+	mode = AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
+	       AFBC_FORMAT_MOD_SPARSE |
+	       AFBC_FORMAT_MOD_SPLIT;
+
+	switch (format) {
+	case DRM_FORMAT_RGBA8888:
+	case DRM_FORMAT_RGB888:
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_RGBA4444:
+	case DRM_FORMAT_RGBA5551:
+	case DRM_FORMAT_RGBA1010102:
+		mode |= AFBC_FORMAT_MOD_YTR;
+		break;
+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_Y210:
+	case DRM_FORMAT_YUV420_8BIT:
+	case DRM_FORMAT_YUV420_10BIT:
+		break;
+	default:
+		return false;
+	}
+
+	return modifier == DRM_FORMAT_MOD_ARM_AFBC(mode);
+}
+
+void sun50i_afbc_atomic_update(struct sun8i_mixer *mixer, unsigned int channel,
+			       struct drm_plane *plane)
+{
+	struct drm_plane_state *state = plane->state;
+	struct drm_framebuffer *fb = state->fb;
+	const struct drm_format_info *format = fb->format;
+	struct drm_gem_dma_object *gem;
+	u32 base, val, src_w, src_h;
+	u32 def_color0, def_color1;
+	struct regmap *regs;
+	dma_addr_t dma_addr;
+
+	base = sun50i_afbc_get_base(mixer, channel);
+	regs = mixer->engine.regs;
+
+	src_w = drm_rect_width(&state->src) >> 16;
+	src_h = drm_rect_height(&state->src) >> 16;
+
+	val = SUN50I_FBD_SIZE_HEIGHT(src_h);
+	val |= SUN50I_FBD_SIZE_WIDTH(src_w);
+	regmap_write(regs, SUN50I_FBD_SIZE(base), val);
+
+	val = SUN50I_FBD_BLK_SIZE_HEIGHT(DIV_ROUND_UP(src_h, 16));
+	val = SUN50I_FBD_BLK_SIZE_WIDTH(DIV_ROUND_UP(src_w, 16));
+	regmap_write(regs, SUN50I_FBD_BLK_SIZE(base), val);
+
+	val = SUN50I_FBD_SRC_CROP_TOP(0);
+	val |= SUN50I_FBD_SRC_CROP_LEFT(0);
+	regmap_write(regs, SUN50I_FBD_SRC_CROP(base), val);
+
+	val = SUN50I_FBD_LAY_CROP_TOP(state->src.y1 >> 16);
+	val |= SUN50I_FBD_LAY_CROP_LEFT(state->src.x1 >> 16);
+	regmap_write(regs, SUN50I_FBD_LAY_CROP(base), val);
+
+	/*
+	 * Default color is always set to white, in colorspace and bitness
+	 * that coresponds to used format. If it is actually used or not
+	 * depends on AFBC buffer. At least in Cedrus it can be turned on
+	 * or off.
+	 * NOTE: G and B channels are off by 1 (up). It's unclear if this
+	 * is because HW need such value or it is due to good enough code
+	 * in vendor driver and HW clips the value anyway.
+	 */
+	def_color0 = 0;
+	def_color1 = 0;
+
+	val = 0;
+	switch (format->format) {
+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_YUV420_10BIT:
+		val |= SUN50I_FBD_FMT_SBS1(2);
+		val |= SUN50I_FBD_FMT_SBS0(1);
+		break;
+	case DRM_FORMAT_Y210:
+		val |= SUN50I_FBD_FMT_SBS1(3);
+		val |= SUN50I_FBD_FMT_SBS0(2);
+		break;
+	default:
+		val |= SUN50I_FBD_FMT_SBS1(1);
+		val |= SUN50I_FBD_FMT_SBS0(1);
+		break;
+	}
+	switch (format->format) {
+	case DRM_FORMAT_RGBA8888:
+		val |= SUN50I_FBD_FMT_YUV_TRAN;
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_RGBA_8888);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(255) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(255);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(256) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(256);
+		break;
+	case DRM_FORMAT_RGB888:
+		val |= SUN50I_FBD_FMT_YUV_TRAN;
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_RGB_888);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(0) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(255);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(256) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(256);
+		break;
+	case DRM_FORMAT_RGB565:
+		val |= SUN50I_FBD_FMT_YUV_TRAN;
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_RGB_565);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(0) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(31);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(64) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(32);
+		break;
+	case DRM_FORMAT_RGBA4444:
+		val |= SUN50I_FBD_FMT_YUV_TRAN;
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_RGBA_4444);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(15) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(15);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(16) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(16);
+		break;
+	case DRM_FORMAT_RGBA5551:
+		val |= SUN50I_FBD_FMT_YUV_TRAN;
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_RGBA_5551);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(1) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(31);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(32) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(32);
+		break;
+	case DRM_FORMAT_RGBA1010102:
+		val |= SUN50I_FBD_FMT_YUV_TRAN;
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_RGBA1010102);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(3) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(1023);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(1024) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(1024);
+		break;
+	case DRM_FORMAT_YUV420_8BIT:
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_YUV420);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(0) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(255);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(128) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(128);
+		break;
+	case DRM_FORMAT_YUYV:
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_YUV422);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(0) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(255);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(128) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(128);
+		break;
+	case DRM_FORMAT_YUV420_10BIT:
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_P010);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(0) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(1023);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(512) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(512);
+		break;
+	case DRM_FORMAT_Y210:
+		val |= SUN50I_FBD_FMT_IN_FMT(SUN50I_AFBC_P210);
+		def_color0 = SUN50I_FBD_DEFAULT_COLOR0_ALPHA(0) |
+			     SUN50I_FBD_DEFAULT_COLOR0_YR(1023);
+		def_color1 = SUN50I_FBD_DEFAULT_COLOR1_UG(512) |
+			     SUN50I_FBD_DEFAULT_COLOR1_VB(512);
+		break;
+	}
+	regmap_write(regs, SUN50I_FBD_FMT(base), val);
+
+	/* Get the physical address of the buffer in memory */
+	gem = drm_fb_dma_get_gem_obj(fb, 0);
+
+	DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->dma_addr);
+
+	/* Compute the start of the displayed memory */
+	dma_addr = gem->dma_addr + fb->offsets[0];
+
+	regmap_write(regs, SUN50I_FBD_LADDR(base), lower_32_bits(dma_addr));
+	regmap_write(regs, SUN50I_FBD_HADDR(base), upper_32_bits(dma_addr));
+
+	val = SUN50I_FBD_OVL_SIZE_HEIGHT(src_h);
+	val |= SUN50I_FBD_OVL_SIZE_WIDTH(src_w);
+	regmap_write(regs, SUN50I_FBD_OVL_SIZE(base), val);
+
+	val = SUN50I_FBD_OVL_COOR_Y(0);
+	val |= SUN50I_FBD_OVL_COOR_X(0);
+	regmap_write(regs, SUN50I_FBD_OVL_COOR(base), val);
+
+	regmap_write(regs, SUN50I_FBD_OVL_BG_COLOR(base),
+		     SUN8I_MIXER_BLEND_COLOR_BLACK);
+	regmap_write(regs, SUN50I_FBD_DEFAULT_COLOR0(base), def_color0);
+	regmap_write(regs, SUN50I_FBD_DEFAULT_COLOR1(base), def_color1);
+
+	val = SUN50I_FBD_CTL_GLB_ALPHA(state->alpha >> 16);
+	val |= SUN50I_FBD_CTL_CLK_GATE;
+	val |= (state->alpha == DRM_BLEND_ALPHA_OPAQUE) ?
+		SUN50I_FBD_CTL_ALPHA_MODE_PIXEL :
+		SUN50I_FBD_CTL_ALPHA_MODE_COMBINED;
+	val |= SUN50I_FBD_CTL_FBD_EN;
+	regmap_write(regs, SUN50I_FBD_CTL(base), val);
+}
+
+void sun50i_afbc_disable(struct sun8i_mixer *mixer, unsigned int channel)
+{
+	u32 base = sun50i_afbc_get_base(mixer, channel);
+
+	regmap_write(mixer->engine.regs, SUN50I_FBD_CTL(base), 0);
+}
diff --git a/drivers/gpu/drm/sun4i/sun50i_afbc.h b/drivers/gpu/drm/sun4i/sun50i_afbc.h
new file mode 100644
index 0000000000000..cea685c868550
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun50i_afbc.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) Jernej Skrabec <jernej.skrabec@gmail.com>
+ */
+
+#ifndef _SUN50I_AFBC_H_
+#define _SUN50I_AFBC_H_
+
+#include <linux/types.h>
+
+#define SUN50I_AFBC_CH_OFFSET 0x300
+
+#define SUN50I_AFBC_RGBA_8888	0x02
+#define SUN50I_AFBC_RGB_888	0x08
+#define SUN50I_AFBC_RGB_565	0x0a
+#define SUN50I_AFBC_RGBA_4444	0x0e
+#define SUN50I_AFBC_RGBA_5551	0x12
+#define SUN50I_AFBC_RGBA1010102	0x16
+#define SUN50I_AFBC_YUV422	0x26
+#define SUN50I_AFBC_YUV420	0x2a
+#define SUN50I_AFBC_P010	0x30
+#define SUN50I_AFBC_P210	0x32
+
+#define SUN50I_FBD_CTL(base)			((base) + 0x00)
+#define SUN50I_FBD_CTL_GLB_ALPHA(v)		((v) << 24)
+#define SUN50I_FBD_CTL_CLK_GATE			BIT(4)
+#define SUN50I_FBD_CTL_ALPHA_MODE_PIXEL		((0) << 2)
+#define SUN50I_FBD_CTL_ALPHA_MODE_LAYER		((1) << 2)
+#define SUN50I_FBD_CTL_ALPHA_MODE_COMBINED	((2) << 2)
+#define SUN50I_FBD_CTL_FBD_FCEN			BIT(1)
+#define SUN50I_FBD_CTL_FBD_EN			BIT(0)
+
+#define SUN50I_FBD_SIZE(base)			((base) + 0x08)
+#define SUN50I_FBD_SIZE_HEIGHT(v)		(((v) - 1) << 16)
+#define SUN50I_FBD_SIZE_WIDTH(v)		(((v) - 1) << 0)
+
+#define SUN50I_FBD_BLK_SIZE(base)		((base) + 0x0c)
+#define SUN50I_FBD_BLK_SIZE_HEIGHT(v)		((v) << 16)
+#define SUN50I_FBD_BLK_SIZE_WIDTH(v)		((v) << 0)
+
+#define SUN50I_FBD_SRC_CROP(base)		((base) + 0x10)
+#define SUN50I_FBD_SRC_CROP_TOP(v)		((v) << 16)
+#define SUN50I_FBD_SRC_CROP_LEFT(v)		((v) << 0)
+
+#define SUN50I_FBD_LAY_CROP(base)		((base) + 0x14)
+#define SUN50I_FBD_LAY_CROP_TOP(v)		((v) << 16)
+#define SUN50I_FBD_LAY_CROP_LEFT(v)		((v) << 0)
+
+#define SUN50I_FBD_FMT(base)			((base) + 0x18)
+#define SUN50I_FBD_FMT_SBS1(v)			((v) << 18)
+#define SUN50I_FBD_FMT_SBS0(v)			((v) << 16)
+#define SUN50I_FBD_FMT_YUV_TRAN			BIT(7)
+#define SUN50I_FBD_FMT_IN_FMT(v)		((v) << 0)
+
+#define SUN50I_FBD_LADDR(base)			((base) + 0x20)
+#define SUN50I_FBD_HADDR(base)			((base) + 0x24)
+
+#define SUN50I_FBD_OVL_SIZE(base)		((base) + 0x30)
+#define SUN50I_FBD_OVL_SIZE_HEIGHT(v)		(((v) - 1) << 16)
+#define SUN50I_FBD_OVL_SIZE_WIDTH(v)		(((v) - 1) << 0)
+
+#define SUN50I_FBD_OVL_COOR(base)		((base) + 0x34)
+#define SUN50I_FBD_OVL_COOR_Y(v)		((v) << 16)
+#define SUN50I_FBD_OVL_COOR_X(v)		((v) << 0)
+
+#define SUN50I_FBD_OVL_BG_COLOR(base)		((base) + 0x38)
+#define SUN50I_FBD_OVL_FILL_COLOR(base)		((base) + 0x3c)
+
+#define SUN50I_FBD_DEFAULT_COLOR0(base)		((base) + 0x50)
+#define SUN50I_FBD_DEFAULT_COLOR0_ALPHA(v)	((v) << 16)
+#define SUN50I_FBD_DEFAULT_COLOR0_YR(v)		((v) << 0)
+
+#define SUN50I_FBD_DEFAULT_COLOR1(base)		((base) + 0x54)
+#define SUN50I_FBD_DEFAULT_COLOR1_VB(v)		((v) << 16)
+#define SUN50I_FBD_DEFAULT_COLOR1_UG(v)		((v) << 0)
+
+struct sun8i_mixer;
+struct drm_plane;
+
+bool sun50i_afbc_format_mod_supported(struct sun8i_mixer *mixer,
+				      u32 format, u64 modifier);
+
+void sun50i_afbc_atomic_update(struct sun8i_mixer *mixer, unsigned int channel,
+			       struct drm_plane *plane);
+void sun50i_afbc_disable(struct sun8i_mixer *mixer, unsigned int channel);
+
+#endif
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index d19349eecc9de..84f8917e2dd87 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -11,8 +11,10 @@
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>
 #include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_probe_helper.h>
 
+#include "sun50i_afbc.h"
 #include "sun8i_csc.h"
 #include "sun8i_mixer.h"
 #include "sun8i_vi_layer.h"
@@ -50,7 +52,7 @@ static void sun8i_vi_layer_update_alpha(struct sun8i_mixer *mixer, int channel,
 
 static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 				       int overlay, struct drm_plane *plane,
-				       unsigned int zpos)
+				       unsigned int zpos, bool afbc)
 {
 	struct drm_plane_state *state = plane->state;
 	const struct drm_format_info *format = state->fb->format;
@@ -135,7 +137,7 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 
 		required = src_h * 100 / dst_h;
 
-		if (ability < required) {
+		if (!afbc && ability < required) {
 			DRM_DEBUG_DRIVER("Using vertical coarse scaling\n");
 			vm = src_h;
 			vn = (u32)ability * dst_h / 100;
@@ -145,7 +147,7 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 		/* it seems that every RGB scaler has buffer for 2048 pixels */
 		scanline = subsampled ? mixer->cfg->scanline_yuv : 2048;
 
-		if (src_w > scanline) {
+		if (!afbc && src_w > scanline) {
 			DRM_DEBUG_DRIVER("Using horizontal coarse scaling\n");
 			hm = src_w;
 			hn = scanline;
@@ -308,6 +310,15 @@ static int sun8i_vi_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
 	return 0;
 }
 
+static void sun8i_vi_layer_prepare_non_linear(struct sun8i_mixer *mixer,
+					      int channel, int overlay)
+{
+	u32 base = sun8i_channel_base(mixer, channel);
+
+	regmap_write(mixer->engine.regs,
+		     SUN8I_MIXER_CHAN_VI_LAYER_ATTR(base, overlay), 0);
+}
+
 static int sun8i_vi_layer_atomic_check(struct drm_plane *plane,
 				       struct drm_atomic_state *state)
 {
@@ -348,18 +359,45 @@ static void sun8i_vi_layer_atomic_update(struct drm_plane *plane,
 	struct sun8i_layer *layer = plane_to_sun8i_layer(plane);
 	unsigned int zpos = new_state->normalized_zpos;
 	struct sun8i_mixer *mixer = layer->mixer;
+	struct drm_framebuffer *fb = plane->state->fb;
+	bool afbc = drm_is_afbc(fb->modifier);
 
-	if (!new_state->crtc || !new_state->visible)
+	if (!new_state->crtc || !new_state->visible) {
+		if (mixer->cfg->de_type >= sun8i_mixer_de3)
+			sun50i_afbc_disable(mixer, layer->channel);
 		return;
+	}
 
 	sun8i_vi_layer_update_coord(mixer, layer->channel,
-				    layer->overlay, plane, zpos);
-	sun8i_vi_layer_update_alpha(mixer, layer->channel,
-				    layer->overlay, plane);
-	sun8i_vi_layer_update_formats(mixer, layer->channel,
-				      layer->overlay, plane);
-	sun8i_vi_layer_update_buffer(mixer, layer->channel,
-				     layer->overlay, plane);
+				    layer->overlay, plane, zpos, afbc);
+
+	if (afbc) {
+		u32 fmt_type;
+
+		sun8i_vi_layer_prepare_non_linear(mixer, layer->channel,
+						  layer->overlay);
+		sun50i_afbc_atomic_update(mixer, layer->channel, plane);
+
+		fmt_type = sun8i_vi_layer_get_format_type(fb->format);
+		sun8i_csc_set_ccsc(mixer, layer->channel, fmt_type,
+				   plane->state->color_encoding,
+				   plane->state->color_range);
+	} else {
+		sun8i_vi_layer_update_alpha(mixer, layer->channel,
+					    layer->overlay, plane);
+		sun8i_vi_layer_update_formats(mixer, layer->channel,
+					      layer->overlay, plane);
+		sun8i_vi_layer_update_buffer(mixer, layer->channel,
+					     layer->overlay, plane);
+	}
+}
+
+static bool sun8i_vi_layer_format_mod_supported(struct drm_plane *plane,
+						u32 format, u64 modifier)
+{
+	struct sun8i_layer *layer = plane_to_sun8i_layer(plane);
+
+	return sun50i_afbc_format_mod_supported(layer->mixer, format, modifier);
 }
 
 static const struct drm_plane_helper_funcs sun8i_vi_layer_helper_funcs = {
@@ -374,6 +412,7 @@ static const struct drm_plane_funcs sun8i_vi_layer_funcs = {
 	.disable_plane		= drm_atomic_helper_disable_plane,
 	.reset			= drm_atomic_helper_plane_reset,
 	.update_plane		= drm_atomic_helper_update_plane,
+	.format_mod_supported   = sun8i_vi_layer_format_mod_supported,
 };
 
 /*
@@ -457,6 +496,11 @@ static const u32 sun8i_vi_layer_de3_formats[] = {
 	DRM_FORMAT_YVU411,
 	DRM_FORMAT_YVU420,
 	DRM_FORMAT_YVU422,
+
+	/* AFBC only formats */
+	DRM_FORMAT_YUV420_8BIT,
+	DRM_FORMAT_YUV420_10BIT,
+	DRM_FORMAT_Y210,
 };
 
 static const uint64_t sun8i_layer_modifiers[] = {
@@ -464,6 +508,18 @@ static const uint64_t sun8i_layer_modifiers[] = {
 	DRM_FORMAT_MOD_INVALID
 };
 
+static const uint64_t sun50i_layer_de3_modifiers[] = {
+	DRM_FORMAT_MOD_ARM_AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
+				AFBC_FORMAT_MOD_SPARSE |
+				AFBC_FORMAT_MOD_SPLIT),
+	DRM_FORMAT_MOD_ARM_AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
+				AFBC_FORMAT_MOD_YTR |
+				AFBC_FORMAT_MOD_SPARSE |
+				AFBC_FORMAT_MOD_SPLIT),
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
 struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 					    struct sun8i_mixer *mixer,
 					    int index)
@@ -472,6 +528,7 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 	u32 supported_encodings, supported_ranges;
 	unsigned int plane_cnt, format_count;
 	struct sun8i_layer *layer;
+	const uint64_t *modifiers;
 	const u32 *formats;
 	int ret;
 
@@ -487,9 +544,11 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 	if (mixer->cfg->de_type >= sun8i_mixer_de3) {
 		formats = sun8i_vi_layer_de3_formats;
 		format_count = ARRAY_SIZE(sun8i_vi_layer_de3_formats);
+		modifiers = sun50i_layer_de3_modifiers;
 	} else {
 		formats = sun8i_vi_layer_formats;
 		format_count = ARRAY_SIZE(sun8i_vi_layer_formats);
+		modifiers = sun8i_layer_modifiers;
 	}
 
 	if (!mixer->cfg->ui_num && index == 0)
@@ -499,8 +558,7 @@ struct sun8i_layer *sun8i_vi_layer_init_one(struct drm_device *drm,
 	ret = drm_universal_plane_init(drm, &layer->plane, 0,
 				       &sun8i_vi_layer_funcs,
 				       formats, format_count,
-				       sun8i_layer_modifiers,
-				       type, NULL);
+				       modifiers, type, NULL);
 	if (ret) {
 		dev_err(drm->dev, "Couldn't initialize layer\n");
 		return ERR_PTR(ret);
-- 
2.46.1

[PATCH v5 19/26] dt-bindings: allwinner: add H616 DE33 bus binding

[Ryan Walklin]

The Allwinner H616 and variants have a new display engine revision
(DE33).

Add a display engine bus binding for the DE33.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>

---
Changelog v1..v2:
- Correct DE2 bus enum to reflect fallback devices accurately.

Changelog v2..v3:
- Separate content into three patches for three separate subsystems
---
 .../devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml b/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml
index 9845a187bdf65..ea7ee89158c61 100644
--- a/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml
+++ b/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml
@@ -24,7 +24,9 @@ properties:
     oneOf:
       - const: allwinner,sun50i-a64-de2
       - items:
-          - const: allwinner,sun50i-h6-de3
+          - enum:
+              - allwinner,sun50i-h6-de3
+              - allwinner,sun50i-h616-de33
           - const: allwinner,sun50i-a64-de2
 
   reg:
-- 
2.46.1

Re: [PATCH v5 19/26] dt-bindings: allwinner: add H616 DE33 bus binding

[Chris Morgan]

On Sun, Sep 29, 2024 at 10:04:51PM +1300, Ryan Walklin wrote:
> The Allwinner H616 and variants have a new display engine revision
> (DE33).
> 
> Add a display engine bus binding for the DE33.
> 
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
> 
> ---
> Changelog v1..v2:
> - Correct DE2 bus enum to reflect fallback devices accurately.
> 
> Changelog v2..v3:
> - Separate content into three patches for three separate subsystems
> ---
>  .../devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml     | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml b/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml
> index 9845a187bdf65..ea7ee89158c61 100644
> --- a/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml
> +++ b/Documentation/devicetree/bindings/bus/allwinner,sun50i-a64-de2.yaml
> @@ -24,7 +24,9 @@ properties:
>      oneOf:
>        - const: allwinner,sun50i-a64-de2
>        - items:
> -          - const: allwinner,sun50i-h6-de3
> +          - enum:
> +              - allwinner,sun50i-h6-de3
> +              - allwinner,sun50i-h616-de33
>            - const: allwinner,sun50i-a64-de2
>  
>    reg:
> -- 
> 2.46.1
> 

Because the h616 uses additional reg values, we need to change
      reg:
         maxItems: 1

To
      reg:
        minItems: 1
        maxItems: 3

Thank you,
Chris

[PATCH v5 20/26] dt-bindings: allwinner: add H616 DE33 clock binding

[Ryan Walklin]

The Allwinner H616 and variants have a new display engine revision
(DE33).

Add a clock binding for the DE33.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>

---
Changelog v2..v3:
- Separate content into three patches for three separate subsystems
---
 .../devicetree/bindings/clock/allwinner,sun8i-a83t-de2-clk.yaml  | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/clock/allwinner,sun8i-a83t-de2-clk.yaml b/Documentation/devicetree/bindings/clock/allwinner,sun8i-a83t-de2-clk.yaml
index 70369bd633e40..7fcd55d468d49 100644
--- a/Documentation/devicetree/bindings/clock/allwinner,sun8i-a83t-de2-clk.yaml
+++ b/Documentation/devicetree/bindings/clock/allwinner,sun8i-a83t-de2-clk.yaml
@@ -25,6 +25,7 @@ properties:
       - const: allwinner,sun50i-a64-de2-clk
       - const: allwinner,sun50i-h5-de2-clk
       - const: allwinner,sun50i-h6-de3-clk
+      - const: allwinner,sun50i-h616-de33-clk
       - items:
           - const: allwinner,sun8i-r40-de2-clk
           - const: allwinner,sun8i-h3-de2-clk
-- 
2.46.1

[PATCH v5 21/26] dt-bindings: allwinner: add H616 DE33 mixer binding

[Ryan Walklin]

The Allwinner H616 and variants have a new display engine revision
(DE33).

The mixer configuration registers are significantly different to the DE3
and DE2 revisions, being split into separate top and display blocks,
therefore a fallback for the mixer compatible is not provided.

Add a display engine mixer binding for the DE33.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>

---
Changelog v2..v3:
- Separate content into three patches for three separate subsystems
---
 .../bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml         | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml b/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml
index b75c1ec686ad2..c37eb8ae1b8ee 100644
--- a/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml
+++ b/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml
@@ -24,6 +24,7 @@ properties:
       - allwinner,sun50i-a64-de2-mixer-0
       - allwinner,sun50i-a64-de2-mixer-1
       - allwinner,sun50i-h6-de3-mixer-0
+      - allwinner,sun50i-h616-de33-mixer-0
 
   reg:
     maxItems: 1
-- 
2.46.1

Re: [PATCH v5 21/26] dt-bindings: allwinner: add H616 DE33 mixer binding

[Chris Morgan]

On Sun, Sep 29, 2024 at 10:04:53PM +1300, Ryan Walklin wrote:
> The Allwinner H616 and variants have a new display engine revision
> (DE33).
> 
> The mixer configuration registers are significantly different to the DE3
> and DE2 revisions, being split into separate top and display blocks,
> therefore a fallback for the mixer compatible is not provided.
> 
> Add a display engine mixer binding for the DE33.
> 
> Signed-off-by: Ryan Walklin <ryan@testtoast.com>
> Acked-by: Conor Dooley <conor.dooley@microchip.com>
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
> 
> ---
> Changelog v2..v3:
> - Separate content into three patches for three separate subsystems
> ---
>  .../bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml         | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml b/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml
> index b75c1ec686ad2..c37eb8ae1b8ee 100644
> --- a/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml
> +++ b/Documentation/devicetree/bindings/display/allwinner,sun8i-a83t-de2-mixer.yaml
> @@ -24,6 +24,7 @@ properties:
>        - allwinner,sun50i-a64-de2-mixer-0
>        - allwinner,sun50i-a64-de2-mixer-1
>        - allwinner,sun50i-h6-de3-mixer-0
> +      - allwinner,sun50i-h616-de33-mixer-0
>  
>    reg:
>      maxItems: 1

-    maxItems: 1
+    minItems: 1
+    maxItems: 3

> -- 
> 2.46.1
> 

Also need to add constraints to set maxItems to 3 only for the h616-de33

+allOf:
+  - if:
+      properties:
+        compatible:
+          enum:
+            - allwinner,sun50i-h616-de33-mixer-0
+
+    then:
+      properties:
+        reg:
+          maxItems: 3
+
+    else:
+      properties:
+        reg:
+          maxItems: 1
+

Thank you,
Chris

[PATCH v5 22/26] clk: sunxi-ng: ccu: add Display Engine 3.3 (DE33) support

[Ryan Walklin]

The DE33 is a newer version of the Allwinner Display Engine IP block,
found in the H616, H618, H700 and T507 SoCs. DE2 and DE3 are already
supported by the mainline driver.

The DE33 in the H616 has mixer0 and writeback units. The clocks
and resets required are identical to the H3 and H5 respectively, so use
those existing structs for the H616 description.

There are two additional 32-bit registers (at offsets 0x24 and 0x28)
which require clearing and setting respectively to bring up the
hardware. The function of these registers is currently unknown, and the
values are taken from the out-of-tree driver.

Add the required clock description struct and compatible string to the
DE2 driver.

Signed-off-by: Ryan Walklin <ryan@testtoast.com>

---
Changelog v2..v3:
- Lowercase hex value

Changelog v2..v3:
- Correct #include for writel()

Changelog v4..v5:
- Whitespace fix
---
 drivers/clk/sunxi-ng/ccu-sun8i-de2.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-de2.c b/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
index 7683ea08d8e30..83eab6f132aad 100644
--- a/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
+++ b/drivers/clk/sunxi-ng/ccu-sun8i-de2.c
@@ -5,6 +5,7 @@
 
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
+#include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
@@ -239,6 +240,16 @@ static const struct sunxi_ccu_desc sun50i_h5_de2_clk_desc = {
 	.num_resets	= ARRAY_SIZE(sun50i_h5_de2_resets),
 };
 
+static const struct sunxi_ccu_desc sun50i_h616_de33_clk_desc = {
+	.ccu_clks	= sun8i_de2_ccu_clks,
+	.num_ccu_clks	= ARRAY_SIZE(sun8i_de2_ccu_clks),
+
+	.hw_clks	= &sun8i_h3_de2_hw_clks,
+
+	.resets		= sun50i_h5_de2_resets,
+	.num_resets	= ARRAY_SIZE(sun50i_h5_de2_resets),
+};
+
 static int sunxi_de2_clk_probe(struct platform_device *pdev)
 {
 	struct clk *bus_clk, *mod_clk;
@@ -291,6 +302,16 @@ static int sunxi_de2_clk_probe(struct platform_device *pdev)
 		goto err_disable_mod_clk;
 	}
 
+	/*
+	 * The DE33 requires these additional (unknown) registers set
+	 * during initialisation.
+	 */
+	if (of_device_is_compatible(pdev->dev.of_node,
+				    "allwinner,sun50i-h616-de33-clk")) {
+		writel(0, reg + 0x24);
+		writel(0x0000a980, reg + 0x28);
+	}
+
 	ret = devm_sunxi_ccu_probe(&pdev->dev, reg, ccu_desc);
 	if (ret)
 		goto err_assert_reset;
@@ -335,6 +356,10 @@ static const struct of_device_id sunxi_de2_clk_ids[] = {
 		.compatible = "allwinner,sun50i-h6-de3-clk",
 		.data = &sun50i_h5_de2_clk_desc,
 	},
+	{
+		.compatible = "allwinner,sun50i-h616-de33-clk",
+		.data = &sun50i_h616_de33_clk_desc,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sunxi_de2_clk_ids);
-- 
2.46.1

[PATCH v5 23/26] drm: sun4i: de33: mixer: add Display Engine 3.3 (DE33) support

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The DE33 is a newer version of the Allwinner Display Engine IP block,
found in the H616, H618, H700 and T507 SoCs. DE2 and DE3 are already
supported by the mainline driver.

Notable features (from the H616 datasheet and implemented):
- 4096 x 2048 (4K) output support
- AFBC ARM Frame Buffer Compression support
- YUV420 input support

The DE2 and DE3 engines have a blender register range within the
mixer engine register map, whereas the DE33 separates this out into
a separate display group, and adds a top register map.

Extend the mixer to support the DE33.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>

---
Changelog v4..v5:
- Whitespace fixes
- Correct strict mode warnings from checkpatch.pl
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c | 109 ++++++++++++++++++++++++----
 drivers/gpu/drm/sun4i/sun8i_mixer.h |  16 +++-
 2 files changed, 108 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 600084286b39d..204fc8055b32a 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -321,8 +321,12 @@ static void sun8i_mixer_commit(struct sunxi_engine *engine,
 	regmap_write(bld_regs, SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
 		     pipe_en | SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0));
 
-	regmap_write(engine->regs, SUN8I_MIXER_GLOBAL_DBUFF,
-		     SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
+	if (mixer->cfg->de_type == sun8i_mixer_de33)
+		regmap_write(mixer->top_regs, SUN50I_MIXER_GLOBAL_DBUFF,
+			     SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
+	else
+		regmap_write(engine->regs, SUN8I_MIXER_GLOBAL_DBUFF,
+			     SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
 }
 
 static struct drm_plane **sun8i_layers_init(struct drm_device *drm,
@@ -371,25 +375,33 @@ static void sun8i_mixer_mode_set(struct sunxi_engine *engine,
 				 const struct drm_display_mode *mode)
 {
 	struct sun8i_mixer *mixer = engine_to_sun8i_mixer(engine);
+	struct regmap *bld_regs, *disp_regs;
 	u32 bld_base, size, val;
 	bool interlaced;
 
 	bld_base = sun8i_blender_base(mixer);
+	bld_regs = sun8i_blender_regmap(mixer);
 	interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
 	size = SUN8I_MIXER_SIZE(mode->hdisplay, mode->vdisplay);
 
 	DRM_DEBUG_DRIVER("Updating global size W: %u H: %u\n",
 			 mode->hdisplay, mode->vdisplay);
 
-	regmap_write(engine->regs, SUN8I_MIXER_GLOBAL_SIZE, size);
-	regmap_write(engine->regs, SUN8I_MIXER_BLEND_OUTSIZE(bld_base), size);
+	if (mixer->cfg->de_type == sun8i_mixer_de33) {
+		disp_regs = mixer->disp_regs;
+		regmap_write(mixer->top_regs, SUN50I_MIXER_GLOBAL_SIZE, size);
+	} else {
+		disp_regs = mixer->engine.regs;
+		regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_SIZE, size);
+	}
+	regmap_write(bld_regs, SUN8I_MIXER_BLEND_OUTSIZE(bld_base), size);
 
 	if (interlaced)
 		val = SUN8I_MIXER_BLEND_OUTCTL_INTERLACED;
 	else
 		val = 0;
 
-	regmap_update_bits(engine->regs, SUN8I_MIXER_BLEND_OUTCTL(bld_base),
+	regmap_update_bits(bld_regs, SUN8I_MIXER_BLEND_OUTCTL(bld_base),
 			   SUN8I_MIXER_BLEND_OUTCTL_INTERLACED, val);
 
 	DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
@@ -400,10 +412,8 @@ static void sun8i_mixer_mode_set(struct sunxi_engine *engine,
 	else
 		val = 0xff108080;
 
-	regmap_write(mixer->engine.regs,
-		     SUN8I_MIXER_BLEND_BKCOLOR(bld_base), val);
-	regmap_write(mixer->engine.regs,
-		     SUN8I_MIXER_BLEND_ATTR_FCOLOR(bld_base, 0), val);
+	regmap_write(disp_regs, SUN8I_MIXER_BLEND_BKCOLOR(bld_base), val);
+	regmap_write(disp_regs, SUN8I_MIXER_BLEND_ATTR_FCOLOR(bld_base, 0), val);
 
 	if (mixer->cfg->has_formatter)
 		sun50i_fmt_setup(mixer, mode->hdisplay,
@@ -443,12 +453,29 @@ static const struct sunxi_engine_ops sun8i_engine_ops = {
 };
 
 static const struct regmap_config sun8i_mixer_regmap_config = {
+	.name		= "layers",
 	.reg_bits	= 32,
 	.val_bits	= 32,
 	.reg_stride	= 4,
 	.max_register	= 0xffffc, /* guessed */
 };
 
+static const struct regmap_config sun8i_top_regmap_config = {
+	.name		= "top",
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= 0x3c,
+};
+
+static const struct regmap_config sun8i_disp_regmap_config = {
+	.name		= "display",
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= 0x20000,
+};
+
 static int sun8i_mixer_of_get_id(struct device_node *node)
 {
 	struct device_node *ep, *remote;
@@ -471,33 +498,45 @@ static int sun8i_mixer_of_get_id(struct device_node *node)
 
 static void sun8i_mixer_init(struct sun8i_mixer *mixer)
 {
+	struct regmap *top_regs, *disp_regs;
 	unsigned int base = sun8i_blender_base(mixer);
 	int plane_cnt, i;
 
+	if (mixer->cfg->de_type == sun8i_mixer_de33) {
+		top_regs = mixer->top_regs;
+		disp_regs = mixer->disp_regs;
+	} else {
+		top_regs = mixer->engine.regs;
+		disp_regs = mixer->engine.regs;
+	}
+
 	/* Enable the mixer */
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_GLOBAL_CTL,
+	regmap_write(top_regs, SUN8I_MIXER_GLOBAL_CTL,
 		     SUN8I_MIXER_GLOBAL_CTL_RT_EN);
 
+	if (mixer->cfg->de_type == sun8i_mixer_de33)
+		regmap_write(top_regs, SUN50I_MIXER_GLOBAL_CLK, 1);
+
 	/* Set background color to black */
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_BKCOLOR(base),
+	regmap_write(disp_regs, SUN8I_MIXER_BLEND_BKCOLOR(base),
 		     SUN8I_MIXER_BLEND_COLOR_BLACK);
 
 	/*
 	 * Set fill color of bottom plane to black. Generally not needed
 	 * except when VI plane is at bottom (zpos = 0) and enabled.
 	 */
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
+	regmap_write(disp_regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
 		     SUN8I_MIXER_BLEND_PIPE_CTL_FC_EN(0));
-	regmap_write(mixer->engine.regs, SUN8I_MIXER_BLEND_ATTR_FCOLOR(base, 0),
+	regmap_write(disp_regs, SUN8I_MIXER_BLEND_ATTR_FCOLOR(base, 0),
 		     SUN8I_MIXER_BLEND_COLOR_BLACK);
 
 	plane_cnt = mixer->cfg->vi_num + mixer->cfg->ui_num;
 	for (i = 0; i < plane_cnt; i++)
-		regmap_write(mixer->engine.regs,
+		regmap_write(disp_regs,
 			     SUN8I_MIXER_BLEND_MODE(base, i),
 			     SUN8I_MIXER_BLEND_MODE_DEF);
 
-	regmap_update_bits(mixer->engine.regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
+	regmap_update_bits(disp_regs, SUN8I_MIXER_BLEND_PIPE_CTL(base),
 			   SUN8I_MIXER_BLEND_PIPE_CTL_EN_MSK, 0);
 }
 
@@ -573,6 +612,30 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master,
 		return PTR_ERR(mixer->engine.regs);
 	}
 
+	if (mixer->cfg->de_type == sun8i_mixer_de33) {
+		regs = devm_platform_ioremap_resource(pdev, 1);
+		if (IS_ERR(regs))
+			return PTR_ERR(regs);
+
+		mixer->top_regs = devm_regmap_init_mmio(dev, regs,
+							&sun8i_top_regmap_config);
+		if (IS_ERR(mixer->top_regs)) {
+			dev_err(dev, "Couldn't create the top regmap\n");
+			return PTR_ERR(mixer->top_regs);
+		}
+
+		regs = devm_platform_ioremap_resource(pdev, 2);
+		if (IS_ERR(regs))
+			return PTR_ERR(regs);
+
+		mixer->disp_regs = devm_regmap_init_mmio(dev, regs,
+							 &sun8i_disp_regmap_config);
+		if (IS_ERR(mixer->disp_regs)) {
+			dev_err(dev, "Couldn't create the disp regmap\n");
+			return PTR_ERR(mixer->disp_regs);
+		}
+	}
+
 	mixer->reset = devm_reset_control_get(dev, NULL);
 	if (IS_ERR(mixer->reset)) {
 		dev_err(dev, "Couldn't get our reset line\n");
@@ -787,6 +850,18 @@ static const struct sun8i_mixer_cfg sun50i_h6_mixer0_cfg = {
 	.vi_num		= 1,
 };
 
+static const struct sun8i_mixer_cfg sun50i_h616_mixer0_cfg = {
+	.ccsc		= CCSC_MIXER0_LAYOUT,
+	.de_type	= sun8i_mixer_de33,
+	.has_formatter	= 1,
+	.mod_rate	= 600000000,
+	.scaler_mask	= 0xf,
+	.scanline_yuv	= 4096,
+	.ui_num		= 3,
+	.vi_num		= 1,
+	.map		= {0, 6, 7, 8},
+};
+
 static const struct of_device_id sun8i_mixer_of_table[] = {
 	{
 		.compatible = "allwinner,sun8i-a83t-de2-mixer-0",
@@ -832,6 +907,10 @@ static const struct of_device_id sun8i_mixer_of_table[] = {
 		.compatible = "allwinner,sun50i-h6-de3-mixer-0",
 		.data = &sun50i_h6_mixer0_cfg,
 	},
+	{
+		.compatible = "allwinner,sun50i-h616-de33-mixer-0",
+		.data = &sun50i_h616_mixer0_cfg,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sun8i_mixer_of_table);
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 75facc7d1fa66..26b001164647c 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -21,6 +21,10 @@
 #define SUN8I_MIXER_GLOBAL_DBUFF		0x8
 #define SUN8I_MIXER_GLOBAL_SIZE			0xc
 
+#define SUN50I_MIXER_GLOBAL_SIZE		0x8
+#define SUN50I_MIXER_GLOBAL_CLK			0xc
+#define SUN50I_MIXER_GLOBAL_DBUFF		0x10
+
 #define SUN8I_MIXER_GLOBAL_CTL_RT_EN		BIT(0)
 
 #define SUN8I_MIXER_GLOBAL_DBUFF_ENABLE		BIT(0)
@@ -154,6 +158,7 @@ enum {
 enum sun8i_mixer_type {
 	sun8i_mixer_de2,
 	sun8i_mixer_de3,
+	sun8i_mixer_de33,
 };
 
 /**
@@ -180,6 +185,7 @@ struct sun8i_mixer_cfg {
 	unsigned int	de_type;
 	unsigned int    has_formatter : 1;
 	unsigned int	scanline_yuv;
+	unsigned int	map[6];
 };
 
 struct sun8i_mixer {
@@ -191,6 +197,9 @@ struct sun8i_mixer {
 
 	struct clk			*bus_clk;
 	struct clk			*mod_clk;
+
+	struct regmap			*top_regs;
+	struct regmap			*disp_regs;
 };
 
 enum {
@@ -227,13 +236,16 @@ sun8i_blender_base(struct sun8i_mixer *mixer)
 static inline struct regmap *
 sun8i_blender_regmap(struct sun8i_mixer *mixer)
 {
-	return mixer->engine.regs;
+	return mixer->cfg->de_type == sun8i_mixer_de33 ?
+		mixer->disp_regs : mixer->engine.regs;
 }
 
 static inline u32
 sun8i_channel_base(struct sun8i_mixer *mixer, int channel)
 {
-	if (mixer->cfg->de_type == sun8i_mixer_de3)
+	if (mixer->cfg->de_type == sun8i_mixer_de33)
+		return mixer->cfg->map[channel] * 0x20000 + DE2_CH_SIZE;
+	else if (mixer->cfg->de_type == sun8i_mixer_de3)
 		return DE3_CH_BASE + channel * DE3_CH_SIZE;
 	else
 		return DE2_CH_BASE + channel * DE2_CH_SIZE;
-- 
2.46.1

[PATCH v5 24/26] drm: sun4i: de33: vi_scaler: add Display Engine 3.3 (DE33) support

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

The vi_scaler appears to be used in preference to the ui_scaler module
for hardware video scaling in the DE33.

Enable support for this scaler.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_ui_layer.c  | 19 +++++++++++++++----
 drivers/gpu/drm/sun4i/sun8i_vi_scaler.c |  7 ++++++-
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index 7f1231cf0f012..180be9d67d9c3 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -95,12 +95,23 @@ static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 		hscale = state->src_w / state->crtc_w;
 		vscale = state->src_h / state->crtc_h;
 
-		sun8i_ui_scaler_setup(mixer, channel, src_w, src_h, dst_w,
-				      dst_h, hscale, vscale, hphase, vphase);
-		sun8i_ui_scaler_enable(mixer, channel, true);
+		if (mixer->cfg->de_type == sun8i_mixer_de33) {
+			sun8i_vi_scaler_setup(mixer, channel, src_w, src_h,
+					      dst_w, dst_h, hscale, vscale,
+					      hphase, vphase,
+					      state->fb->format);
+		} else {
+			sun8i_ui_scaler_setup(mixer, channel, src_w, src_h,
+					      dst_w, dst_h, hscale, vscale,
+					      hphase, vphase);
+			sun8i_ui_scaler_enable(mixer, channel, true);
+		}
 	} else {
 		DRM_DEBUG_DRIVER("HW scaling is not needed\n");
-		sun8i_ui_scaler_enable(mixer, channel, false);
+		if (mixer->cfg->de_type == sun8i_mixer_de33)
+			sun8i_vi_scaler_disable(mixer, channel);
+		else
+			sun8i_ui_scaler_enable(mixer, channel, false);
 	}
 
 	/* Set base coordinates */
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
index e7242301b312c..9c7f6e7d71d50 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c
@@ -835,7 +835,9 @@ static const u32 bicubic4coefftab32[480] = {
 
 static u32 sun8i_vi_scaler_base(struct sun8i_mixer *mixer, int channel)
 {
-	if (mixer->cfg->de_type == sun8i_mixer_de3)
+	if (mixer->cfg->de_type == sun8i_mixer_de33)
+		return sun8i_channel_base(mixer, channel) + 0x3000;
+	else if (mixer->cfg->de_type == sun8i_mixer_de3)
 		return DE3_VI_SCALER_UNIT_BASE +
 		       DE3_VI_SCALER_UNIT_SIZE * channel;
 	else
@@ -845,6 +847,9 @@ static u32 sun8i_vi_scaler_base(struct sun8i_mixer *mixer, int channel)
 
 static bool sun8i_vi_scaler_is_vi_plane(struct sun8i_mixer *mixer, int channel)
 {
+	if (mixer->cfg->de_type == sun8i_mixer_de33)
+		return mixer->cfg->map[channel] < mixer->cfg->vi_num;
+
 	return true;
 }
 
-- 
2.46.1

[PATCH v5 25/26] drm: sun4i: de33: fmt: add Display Engine 3.3 (DE33) support

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Like the DE3, the DE33 has a FMT (formatter) module, which
provides YUV444 to YUV422/YUV420 conversion, format re-mapping and color
depth conversion, although the DE33 module appears significantly more
capable, including up to 4K video support.

Add support for the DE33.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun50i_fmt.c | 21 +++++++++++++++++++--
 drivers/gpu/drm/sun4i/sun50i_fmt.h |  1 +
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun50i_fmt.c b/drivers/gpu/drm/sun4i/sun50i_fmt.c
index 050a8716ae862..39682d4e6d208 100644
--- a/drivers/gpu/drm/sun4i/sun50i_fmt.c
+++ b/drivers/gpu/drm/sun4i/sun50i_fmt.c
@@ -51,6 +51,19 @@ static void sun50i_fmt_de3_limits(u32 *limits, u32 colorspace, bool bit10)
 	}
 }
 
+static void sun50i_fmt_de33_limits(u32 *limits, u32 colorspace)
+{
+	if (colorspace == SUN50I_FMT_CS_YUV444RGB) {
+		limits[0] = SUN50I_FMT_LIMIT(0, 4095);
+		limits[1] = SUN50I_FMT_LIMIT(0, 4095);
+		limits[2] = SUN50I_FMT_LIMIT(0, 4095);
+	} else {
+		limits[0] = SUN50I_FMT_LIMIT(256, 3840);
+		limits[1] = SUN50I_FMT_LIMIT(256, 3840);
+		limits[2] = SUN50I_FMT_LIMIT(256, 3840);
+	}
+}
+
 void sun50i_fmt_setup(struct sun8i_mixer *mixer, u16 width,
 		      u16 height, u32 format)
 {
@@ -60,10 +73,14 @@ void sun50i_fmt_setup(struct sun8i_mixer *mixer, u16 width,
 
 	colorspace = sun50i_fmt_get_colorspace(format);
 	bit10 = sun50i_fmt_is_10bit(format);
-	base = SUN50I_FMT_DE3;
+	base = mixer->cfg->de_type == sun8i_mixer_de3 ?
+		SUN50I_FMT_DE3 : SUN50I_FMT_DE33;
 	regs = sun8i_blender_regmap(mixer);
 
-	sun50i_fmt_de3_limits(limit, colorspace, bit10);
+	if (mixer->cfg->de_type == sun8i_mixer_de3)
+		sun50i_fmt_de3_limits(limit, colorspace, bit10);
+	else
+		sun50i_fmt_de33_limits(limit, colorspace);
 
 	regmap_write(regs, SUN50I_FMT_CTRL(base), 0);
 
diff --git a/drivers/gpu/drm/sun4i/sun50i_fmt.h b/drivers/gpu/drm/sun4i/sun50i_fmt.h
index 4127f7206aade..3e60d5c788b39 100644
--- a/drivers/gpu/drm/sun4i/sun50i_fmt.h
+++ b/drivers/gpu/drm/sun4i/sun50i_fmt.h
@@ -9,6 +9,7 @@
 #include "sun8i_mixer.h"
 
 #define SUN50I_FMT_DE3 0xa8000
+#define SUN50I_FMT_DE33 0x5000
 
 #define SUN50I_FMT_CTRL(base)   ((base) + 0x00)
 #define SUN50I_FMT_SIZE(base)   ((base) + 0x04)
-- 
2.46.1

[PATCH v5 26/26] drm: sun4i: de33: csc: add Display Engine 3.3 (DE33) support

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec@gmail.com>

Like earlier DE versions, the DE33 has a CSC (Color Space Correction)
module. which provides color space conversion between BT2020/BT709, and
dynamic range conversion between SDR/ST2084/HLG.

Add support for the DE33.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c | 96 +++++++++++++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_csc.h |  3 +
 2 files changed, 99 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index 2d5a2cf7cba24..45bd1ca06400e 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -238,6 +238,14 @@ static const u32 yuv2yuv_de3[2][3][3][12] = {
 	},
 };
 
+static u32 sun8i_csc_base(struct sun8i_mixer *mixer, int layer)
+{
+	if (mixer->cfg->de_type == sun8i_mixer_de33)
+		return sun8i_channel_base(mixer, layer) - 0x800;
+	else
+		return ccsc_base[mixer->cfg->ccsc][layer];
+}
+
 static void sun8i_csc_setup(struct regmap *map, u32 base,
 			    enum format_type fmt_type,
 			    enum drm_color_encoding encoding,
@@ -358,6 +366,90 @@ static void sun8i_de3_ccsc_setup(struct sunxi_engine *engine, int layer,
 			   mask, val);
 }
 
+/* extract constant from high word and invert sign if necessary */
+static u32 sun8i_de33_ccsc_get_constant(u32 value)
+{
+	value >>= 16;
+
+	if (value & BIT(15))
+		return 0x400 - (value & 0x3ff);
+
+	return value;
+}
+
+static void sun8i_de33_convert_table(const u32 *src, u32 *dst)
+{
+	dst[0] = sun8i_de33_ccsc_get_constant(src[3]);
+	dst[1] = sun8i_de33_ccsc_get_constant(src[7]);
+	dst[2] = sun8i_de33_ccsc_get_constant(src[11]);
+	memcpy(&dst[3], src, sizeof(u32) * 12);
+	dst[6] &= 0xffff;
+	dst[10] &= 0xffff;
+	dst[14] &= 0xffff;
+}
+
+static void sun8i_de33_ccsc_setup(struct sun8i_mixer *mixer, int layer,
+				  enum format_type fmt_type,
+				  enum drm_color_encoding encoding,
+				  enum drm_color_range range)
+{
+	u32 addr, val = 0, base, csc[15];
+	struct sunxi_engine *engine;
+	struct regmap *map;
+	const u32 *table;
+	int i;
+
+	table = yuv2rgb_de3[range][encoding];
+	base = sun8i_csc_base(mixer, layer);
+	engine = &mixer->engine;
+	map = engine->regs;
+
+	switch (fmt_type) {
+	case FORMAT_TYPE_RGB:
+		if (engine->format == MEDIA_BUS_FMT_RGB888_1X24)
+			break;
+		val = SUN8I_CSC_CTRL_EN;
+		sun8i_de33_convert_table(rgb2yuv_de3[engine->encoding], csc);
+		regmap_bulk_write(map, SUN50I_CSC_COEFF(base, 0), csc, 15);
+		break;
+	case FORMAT_TYPE_YUV:
+		table = sun8i_csc_get_de3_yuv_table(encoding, range,
+						    engine->format,
+						    engine->encoding);
+		if (!table)
+			break;
+		val = SUN8I_CSC_CTRL_EN;
+		sun8i_de33_convert_table(table, csc);
+		regmap_bulk_write(map, SUN50I_CSC_COEFF(base, 0), csc, 15);
+		break;
+	case FORMAT_TYPE_YVU:
+		table = sun8i_csc_get_de3_yuv_table(encoding, range,
+						    engine->format,
+						    engine->encoding);
+		if (!table)
+			table = yuv2yuv_de3[range][encoding][encoding];
+		val = SUN8I_CSC_CTRL_EN;
+		sun8i_de33_convert_table(table, csc);
+		for (i = 0; i < 15; i++) {
+			addr = SUN50I_CSC_COEFF(base, i);
+			if (i > 3) {
+				if (((i - 3) & 3) == 1)
+					addr = SUN50I_CSC_COEFF(base, i + 1);
+				else if (((i - 3) & 3) == 2)
+					addr = SUN50I_CSC_COEFF(base, i - 1);
+			}
+			regmap_write(map, addr, csc[i]);
+		}
+		break;
+	default:
+		val = 0;
+		DRM_WARN("Wrong CSC mode specified.\n");
+		return;
+	}
+
+	regmap_write(map, SUN8I_CSC_CTRL(base), val);
+}
+
 void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
 			enum format_type fmt_type,
 			enum drm_color_encoding encoding,
@@ -369,6 +461,10 @@ void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
 		sun8i_de3_ccsc_setup(&mixer->engine, layer,
 				     fmt_type, encoding, range);
 		return;
+	} else if (mixer->cfg->de_type == sun8i_mixer_de33) {
+		sun8i_de33_ccsc_setup(mixer, layer, fmt_type,
+				      encoding, range);
+		return;
 	}
 
 	if (layer < mixer->cfg->vi_num) {
diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.h b/drivers/gpu/drm/sun4i/sun8i_csc.h
index b7546e06e315c..2b762cb79f02c 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.h
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.h
@@ -20,6 +20,9 @@ struct sun8i_mixer;
 #define SUN8I_CSC_CTRL(base)		((base) + 0x0)
 #define SUN8I_CSC_COEFF(base, i)	((base) + 0x10 + 4 * (i))
 
+#define SUN50I_CSC_COEFF(base, i)	((base) + 0x04 + 4 * (i))
+#define SUN50I_CSC_ALPHA(base)		((base) + 0x40)
+
 #define SUN8I_CSC_CTRL_EN		BIT(0)
 
 enum format_type {
-- 
2.46.1

Re: [PATCH v5 00/26] drm: sun4i: add Display Engine 3.3 (DE33) support

[Philippe Simons]

tested on 6.12-rc1 with RG35XX-H

Tested-by: Philippe Simons <simons.philippe@gmail.com>

On 29/09/2024 11:04, Ryan Walklin wrote:
> Hi,
>
> V5 of this patch series adding support for the Allwinner DE33 display engine variant. V5 is rebased on torvalds/master as of today with the 6.12 drm-next patches included, with no code changes required. V3 and V4 were in turn rebased on top of the layer init and modesetting changes merged for 6.11. No functional changes from V4, fixes and reviews from previous V1-4 added, and relevant issues found by checkpatch.pl corrected.
>
> Original blurb below:
>
> There is existing mainline support for the DE2 and DE3 AllWinner display pipeline IP blocks, used in the A64 and H6 among others, however the H700 (as well as the H616/H618 and the T507 automotive SoC) have a newer version of the Display Engine (v3.3/DE33) which adds additional high-resolution support as well as YUV colour formats and AFBC compression support.
>
> This patch set adds DE33 support, following up from the previous RFC [1], with significant rework to break down the previous relatively complex set into more logical steps, detailed below.
>
> 1. Refactor the existing DE2/DE3 code in readiness to support YUV colour formats in the DE3 engine (patches 1-4).
> 2. Add YUV420 colour format support in the DE3 driver (patches 5-12).
> 3. Replace the is_de3 mixer flag with an enum to support multiple DE versions (patch 13).
> 4. Refactor the mixer, vi_scaler and some register code to merge common init code and more easily support multiple DE versions (patches 14-17).
> 5. Add Arm Frame Buffer Compression (AFBC) compressed buffer support to the DE3 driver. This is currently only supported for VI layers (for HW-decoded video output) but is well integrated into these changes and a subsequent patchset to enable the Video Engine is planned. (patch 18).
> 6. Add DT bindings for the DE33 engine. (patches 19-21).
> 7. Extend the DE2/3 driver for the DE33, comprising clock, mixer, vi_scaler, fmt and csc module support (patches 22-26).
>
> Further patchsets are planned to support HDMI and the LCD timing controller present in these SoCs.
>
> Regards,
>
> Ryan
>
> Jernej Skrabec (22):
>    drm: sun4i: de2/de3: Change CSC argument
>    drm: sun4i: de2/de3: Merge CSC functions into one
>    drm: sun4i: de2/de3: call csc setup also for UI layer
>    drm: sun4i: de2: Initialize layer fields earlier
>    drm: sun4i: de3: Add YUV formatter module
>    drm: sun4i: de3: add format enumeration function to engine
>    drm: sun4i: de3: add formatter flag to mixer config
>    drm: sun4i: de3: add YUV support to the DE3 mixer
>    drm: sun4i: de3: pass engine reference to ccsc setup function
>    drm: sun4i: de3: add YUV support to the color space correction module
>    drm: sun4i: de3: add YUV support to the TCON
>    drm: sun4i: support YUV formats in VI scaler
>    drm: sun4i: de2/de3: add mixer version enum
>    drm: sun4i: de2/de3: refactor mixer initialisation
>    drm: sun4i: vi_scaler refactor vi_scaler enablement
>    drm: sun4i: de2/de3: add generic blender register reference function
>    drm: sun4i: de2/de3: use generic register reference function for layer
>      configuration
>    drm: sun4i: de3: Implement AFBC support
>    drm: sun4i: de33: mixer: add Display Engine 3.3 (DE33) support
>    drm: sun4i: de33: vi_scaler: add Display Engine 3.3 (DE33) support
>    drm: sun4i: de33: fmt: add Display Engine 3.3 (DE33) support
>    drm: sun4i: de33: csc: add Display Engine 3.3 (DE33) support
>
> Ryan Walklin (4):
>    dt-bindings: allwinner: add H616 DE33 bus binding
>    dt-bindings: allwinner: add H616 DE33 clock binding
>    dt-bindings: allwinner: add H616 DE33 mixer binding
>    clk: sunxi-ng: ccu: add Display Engine 3.3 (DE33) support
>
>   .../bus/allwinner,sun50i-a64-de2.yaml         |   4 +-
>   .../clock/allwinner,sun8i-a83t-de2-clk.yaml   |   1 +
>   .../allwinner,sun8i-a83t-de2-mixer.yaml       |   1 +
>   drivers/clk/sunxi-ng/ccu-sun8i-de2.c          |  25 ++
>   drivers/gpu/drm/sun4i/Makefile                |   3 +-
>   drivers/gpu/drm/sun4i/sun4i_tcon.c            |  26 +-
>   drivers/gpu/drm/sun4i/sun50i_afbc.c           | 250 +++++++++++++
>   drivers/gpu/drm/sun4i/sun50i_afbc.h           |  87 +++++
>   drivers/gpu/drm/sun4i/sun50i_fmt.c            |  99 +++++
>   drivers/gpu/drm/sun4i/sun50i_fmt.h            |  33 ++
>   drivers/gpu/drm/sun4i/sun8i_csc.c             | 341 +++++++++++++++---
>   drivers/gpu/drm/sun4i/sun8i_csc.h             |  20 +-
>   drivers/gpu/drm/sun4i/sun8i_mixer.c           | 226 +++++++++---
>   drivers/gpu/drm/sun4i/sun8i_mixer.h           |  31 +-
>   drivers/gpu/drm/sun4i/sun8i_ui_layer.c        |  41 ++-
>   drivers/gpu/drm/sun4i/sun8i_ui_scaler.c       |   2 +-
>   drivers/gpu/drm/sun4i/sun8i_vi_layer.c        | 133 +++++--
>   drivers/gpu/drm/sun4i/sun8i_vi_scaler.c       | 115 ++++--
>   drivers/gpu/drm/sun4i/sun8i_vi_scaler.h       |   2 +-
>   drivers/gpu/drm/sun4i/sunxi_engine.h          |  34 ++
>   20 files changed, 1269 insertions(+), 205 deletions(-)
>   create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.c
>   create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.h
>   create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.c
>   create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.h
>

Re: [PATCH v5 00/26] drm: sun4i: add Display Engine 3.3 (DE33) support

[Chris Morgan]

On Mon, Sep 30, 2024 at 03:30:45PM +0200, Philippe Simons wrote:
> tested on 6.12-rc1 with RG35XX-H
> 
> Tested-by: Philippe Simons <simons.philippe@gmail.com>
> 
> On 29/09/2024 11:04, Ryan Walklin wrote:
> > Hi,
> > 
> > V5 of this patch series adding support for the Allwinner DE33 display engine variant. V5 is rebased on torvalds/master as of today with the 6.12 drm-next patches included, with no code changes required. V3 and V4 were in turn rebased on top of the layer init and modesetting changes merged for 6.11. No functional changes from V4, fixes and reviews from previous V1-4 added, and relevant issues found by checkpatch.pl corrected.
> > 
> > Original blurb below:
> > 
> > There is existing mainline support for the DE2 and DE3 AllWinner display pipeline IP blocks, used in the A64 and H6 among others, however the H700 (as well as the H616/H618 and the T507 automotive SoC) have a newer version of the Display Engine (v3.3/DE33) which adds additional high-resolution support as well as YUV colour formats and AFBC compression support.
> > 
> > This patch set adds DE33 support, following up from the previous RFC [1], with significant rework to break down the previous relatively complex set into more logical steps, detailed below.
> > 
> > 1. Refactor the existing DE2/DE3 code in readiness to support YUV colour formats in the DE3 engine (patches 1-4).
> > 2. Add YUV420 colour format support in the DE3 driver (patches 5-12).
> > 3. Replace the is_de3 mixer flag with an enum to support multiple DE versions (patch 13).
> > 4. Refactor the mixer, vi_scaler and some register code to merge common init code and more easily support multiple DE versions (patches 14-17).
> > 5. Add Arm Frame Buffer Compression (AFBC) compressed buffer support to the DE3 driver. This is currently only supported for VI layers (for HW-decoded video output) but is well integrated into these changes and a subsequent patchset to enable the Video Engine is planned. (patch 18).
> > 6. Add DT bindings for the DE33 engine. (patches 19-21).
> > 7. Extend the DE2/3 driver for the DE33, comprising clock, mixer, vi_scaler, fmt and csc module support (patches 22-26).
> > 
> > Further patchsets are planned to support HDMI and the LCD timing controller present in these SoCs.
> > 
> > Regards,
> > 
> > Ryan
> > 
> > Jernej Skrabec (22):
> >    drm: sun4i: de2/de3: Change CSC argument
> >    drm: sun4i: de2/de3: Merge CSC functions into one
> >    drm: sun4i: de2/de3: call csc setup also for UI layer
> >    drm: sun4i: de2: Initialize layer fields earlier
> >    drm: sun4i: de3: Add YUV formatter module
> >    drm: sun4i: de3: add format enumeration function to engine
> >    drm: sun4i: de3: add formatter flag to mixer config
> >    drm: sun4i: de3: add YUV support to the DE3 mixer
> >    drm: sun4i: de3: pass engine reference to ccsc setup function
> >    drm: sun4i: de3: add YUV support to the color space correction module
> >    drm: sun4i: de3: add YUV support to the TCON
> >    drm: sun4i: support YUV formats in VI scaler
> >    drm: sun4i: de2/de3: add mixer version enum
> >    drm: sun4i: de2/de3: refactor mixer initialisation
> >    drm: sun4i: vi_scaler refactor vi_scaler enablement
> >    drm: sun4i: de2/de3: add generic blender register reference function
> >    drm: sun4i: de2/de3: use generic register reference function for layer
> >      configuration
> >    drm: sun4i: de3: Implement AFBC support
> >    drm: sun4i: de33: mixer: add Display Engine 3.3 (DE33) support
> >    drm: sun4i: de33: vi_scaler: add Display Engine 3.3 (DE33) support
> >    drm: sun4i: de33: fmt: add Display Engine 3.3 (DE33) support
> >    drm: sun4i: de33: csc: add Display Engine 3.3 (DE33) support
> > 
> > Ryan Walklin (4):
> >    dt-bindings: allwinner: add H616 DE33 bus binding
> >    dt-bindings: allwinner: add H616 DE33 clock binding
> >    dt-bindings: allwinner: add H616 DE33 mixer binding
> >    clk: sunxi-ng: ccu: add Display Engine 3.3 (DE33) support
> > 
> >   .../bus/allwinner,sun50i-a64-de2.yaml         |   4 +-
> >   .../clock/allwinner,sun8i-a83t-de2-clk.yaml   |   1 +
> >   .../allwinner,sun8i-a83t-de2-mixer.yaml       |   1 +
> >   drivers/clk/sunxi-ng/ccu-sun8i-de2.c          |  25 ++
> >   drivers/gpu/drm/sun4i/Makefile                |   3 +-
> >   drivers/gpu/drm/sun4i/sun4i_tcon.c            |  26 +-
> >   drivers/gpu/drm/sun4i/sun50i_afbc.c           | 250 +++++++++++++
> >   drivers/gpu/drm/sun4i/sun50i_afbc.h           |  87 +++++
> >   drivers/gpu/drm/sun4i/sun50i_fmt.c            |  99 +++++
> >   drivers/gpu/drm/sun4i/sun50i_fmt.h            |  33 ++
> >   drivers/gpu/drm/sun4i/sun8i_csc.c             | 341 +++++++++++++++---
> >   drivers/gpu/drm/sun4i/sun8i_csc.h             |  20 +-
> >   drivers/gpu/drm/sun4i/sun8i_mixer.c           | 226 +++++++++---
> >   drivers/gpu/drm/sun4i/sun8i_mixer.h           |  31 +-
> >   drivers/gpu/drm/sun4i/sun8i_ui_layer.c        |  41 ++-
> >   drivers/gpu/drm/sun4i/sun8i_ui_scaler.c       |   2 +-
> >   drivers/gpu/drm/sun4i/sun8i_vi_layer.c        | 133 +++++--
> >   drivers/gpu/drm/sun4i/sun8i_vi_scaler.c       | 115 ++++--
> >   drivers/gpu/drm/sun4i/sun8i_vi_scaler.h       |   2 +-
> >   drivers/gpu/drm/sun4i/sunxi_engine.h          |  34 ++
> >   20 files changed, 1269 insertions(+), 205 deletions(-)
> >   create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.c
> >   create mode 100644 drivers/gpu/drm/sun4i/sun50i_afbc.h
> >   create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.c
> >   create mode 100644 drivers/gpu/drm/sun4i/sun50i_fmt.h
> > 

I just wanted to add my Tested-By to this patch series. That said, I can confirm
that we also need to add support for the clock and reset before we activate the
display engine. I'll submit patches for that in a different series (it's a
pre-requisite of this but can be done independently).

Additionally, I do have a few comments on the yaml documentation.

Tested-by: Chris Morgan <macromorgan@hotmail.com>

Thank you,
Chris