Re: [PATCH 3/3] drm/i915: Add format modifiers for Intel

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On 17-03-29 23:17:13, Ville Syrjälä wrote:

On Fri, Mar 24, 2017 at 02:29:50PM -0700, Ben Widawsky wrote:

This was based on a patch originally by Kristian. It has been modified
pretty heavily to use the new callbacks from the previous patch.

v2:
  - Add LINEAR and Yf modifiers to list (Ville)
  - Combine i8xx and i965 into one list of formats (Ville)
  - Allow 1010102 formats for Y/Yf tiled (Ville)

v3:
  - Handle cursor formats (Ville)
  - Put handling for LINEAR in the mod_support functions (Ville)

Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Kristian H. Kristensen <hoegsberg@xxxxxxxxx>
Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_display.c | 112 +++++++++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_sprite.c  |  25 +++++++-
 2 files changed, 131 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 802a8449c5d3..bb559a116fda 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -72,6 +72,12 @@ static const uint32_t i965_primary_formats[] = {
 	DRM_FORMAT_XBGR2101010,
 };

+static const uint64_t i9xx_format_modifiers[] = {
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
 static const uint32_t skl_primary_formats[] = {
 	DRM_FORMAT_C8,
 	DRM_FORMAT_RGB565,
@@ -87,6 +93,14 @@ static const uint32_t skl_primary_formats[] = {
 	DRM_FORMAT_VYUY,
 };

+static const uint64_t skl_format_modifiers[] = {
+	I915_FORMAT_MOD_Yf_TILED,
+	I915_FORMAT_MOD_Y_TILED,
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
 /* Cursor formats */
 static const uint32_t intel_cursor_formats[] = {
 	DRM_FORMAT_ARGB8888,
@@ -13453,6 +13467,83 @@ void intel_plane_destroy(struct drm_plane *plane)
 	kfree(to_intel_plane(plane));
 }

+static bool i8xx_mod_supported(uint32_t format, uint64_t modifier)
+{
+	switch (format) {
+	case DRM_FORMAT_C8:
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB1555:
+	case DRM_FORMAT_XRGB8888:
+		return modifier == DRM_FORMAT_MOD_LINEAR ||
+			modifier == I915_FORMAT_MOD_X_TILED;
+	default:
+		return false;
+	}
+}
+
+static bool i965_mod_supported(uint32_t format, uint64_t modifier)
+{
+	switch (format) {
+	case DRM_FORMAT_C8:
+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_XRGB2101010:
+	case DRM_FORMAT_XBGR2101010:
+		return modifier == DRM_FORMAT_MOD_LINEAR ||
+			modifier == I915_FORMAT_MOD_X_TILED;
+	default:
+		return false;
+	}
+}
+
+static bool skl_mod_supported(uint32_t format, uint64_t modifier)
+{
+	switch (format) {
+	case DRM_FORMAT_C8:
+		return modifier == DRM_FORMAT_MOD_LINEAR ||
+			(modifier >= I915_FORMAT_MOD_X_TILED &&
+			 modifier < I915_FORMAT_MOD_Yf_TILED);


The >= stuff makes this harder to parse than it should be IMO.
I'd just list each modifier explicitly.


+	case DRM_FORMAT_RGB565:
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_ARGB8888:
+	case DRM_FORMAT_ABGR8888:
+	case DRM_FORMAT_XRGB2101010:
+	case DRM_FORMAT_XBGR2101010:
+		return modifier == DRM_FORMAT_MOD_LINEAR ||
+			(modifier >= I915_FORMAT_MOD_X_TILED &&
+			modifier <= I915_FORMAT_MOD_Yf_TILED);


ditto. At first I couldn't even spot the difference between this and
the C8 case.



Okay, got those both. I think for now it's just:
       switch (format) {
       case DRM_FORMAT_C8:
               switch (modifier) {
               case DRM_FORMAT_MOD_LINEAR:
               case I915_FORMAT_MOD_X_TILED:
               case I915_FORMAT_MOD_Y_TILED:
                       return true;
               default:
                       return false;
               }
       case DRM_FORMAT_RGB565:
       case DRM_FORMAT_XRGB8888:
       case DRM_FORMAT_XBGR8888:
       case DRM_FORMAT_ARGB8888:
       case DRM_FORMAT_ABGR8888:
       case DRM_FORMAT_XRGB2101010:
       case DRM_FORMAT_XBGR2101010:
       case DRM_FORMAT_YUYV:
       case DRM_FORMAT_YVYU:
       case DRM_FORMAT_UYVY:
       case DRM_FORMAT_VYUY:
               /* All i915 modifiers are fine */
               switch (modifier) {
               case DRM_FORMAT_MOD_LINEAR:
               case I915_FORMAT_MOD_X_TILED:
               case I915_FORMAT_MOD_Y_TILED:
               case I915_FORMAT_MOD_Yf_TILED:
                       return true;
               default:
                       return false;
               }
       default:
               return false;
       }




+	case DRM_FORMAT_YUYV:
+	case DRM_FORMAT_YVYU:
+	case DRM_FORMAT_UYVY:
+	case DRM_FORMAT_VYUY:
+		return modifier == DRM_FORMAT_MOD_LINEAR;


Any modifier will do for these formats.



Oops, thanks. See above.


+	default:
+		return false;
+	}
+
+}
+
+static bool intel_plane_format_mod_supported(struct drm_plane *plane,
+					     uint32_t format,
+					     uint64_t modifier)
+{
+	struct drm_i915_private *dev_priv = to_i915(plane->dev);
+
+	if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
+		return false;
+
+	if (INTEL_GEN(dev_priv) >= 9)
+		return skl_mod_supported(format, modifier);
+	else if (INTEL_GEN(dev_priv) >= 4)
+		return i965_mod_supported(format, modifier);
+	else
+		return i8xx_mod_supported(format, modifier);
+
+	return false;
+}


I'd also like to see .format_mod_supported() + modifiers[] for
cursors as well. Those should only accept LINEAR+ARGB8888.

Apart from those issues, I think this is looking pretty good.



How about:
       struct drm_i915_private *dev_priv = to_i915(plane->dev);

       if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
               return false;

       if (plane->base.type == DRM_PLANE_TYPE_PRIMARY)
               return modifier == DRM_FORMAT_MOD_LINEAR &&
                       format == DRM_FORMAT_ARGB8888;

       if (INTEL_GEN(dev_priv) >= 9)
               return skl_mod_supported(format, modifier);
       else if (INTEL_GEN(dev_priv) >= 4)
               return i965_mod_supported(format, modifier);
       else
               return i8xx_mod_supported(format, modifier);

       return false;



+
 const struct drm_plane_funcs intel_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
@@ -13462,6 +13553,7 @@ const struct drm_plane_funcs intel_plane_funcs = {
 	.atomic_set_property = intel_plane_atomic_set_property,
 	.atomic_duplicate_state = intel_plane_duplicate_state,
 	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = intel_plane_format_mod_supported,
 };

 static int
@@ -13598,6 +13690,7 @@ static const struct drm_plane_funcs intel_cursor_plane_funcs = {
 	.atomic_set_property = intel_plane_atomic_set_property,
 	.atomic_duplicate_state = intel_plane_duplicate_state,
 	.atomic_destroy_state = intel_plane_destroy_state,
+	.format_mod_supported = intel_plane_format_mod_supported,
 };

 static struct intel_plane *
@@ -13608,6 +13701,7 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 	const uint32_t *intel_primary_formats;
 	unsigned int supported_rotations;
 	unsigned int num_formats;
+	const uint64_t *intel_format_modifiers;
 	int ret;

 	primary = kzalloc(sizeof(*primary), GFP_KERNEL);
@@ -13646,24 +13740,28 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 	if (INTEL_GEN(dev_priv) >= 9) {
 		intel_primary_formats = skl_primary_formats;
 		num_formats = ARRAY_SIZE(skl_primary_formats);
+		intel_format_modifiers = skl_format_modifiers;

 		primary->update_plane = skylake_update_primary_plane;
 		primary->disable_plane = skylake_disable_primary_plane;
 	} else if (HAS_PCH_SPLIT(dev_priv)) {
 		intel_primary_formats = i965_primary_formats;
 		num_formats = ARRAY_SIZE(i965_primary_formats);
+		intel_format_modifiers = i9xx_format_modifiers;

 		primary->update_plane = ironlake_update_primary_plane;
 		primary->disable_plane = i9xx_disable_primary_plane;
 	} else if (INTEL_GEN(dev_priv) >= 4) {
 		intel_primary_formats = i965_primary_formats;
 		num_formats = ARRAY_SIZE(i965_primary_formats);
+		intel_format_modifiers = i9xx_format_modifiers;

 		primary->update_plane = i9xx_update_primary_plane;
 		primary->disable_plane = i9xx_disable_primary_plane;
 	} else {
 		intel_primary_formats = i8xx_primary_formats;
 		num_formats = ARRAY_SIZE(i8xx_primary_formats);
+		intel_format_modifiers = i9xx_format_modifiers;

 		primary->update_plane = i9xx_update_primary_plane;
 		primary->disable_plane = i9xx_disable_primary_plane;
@@ -13673,21 +13771,21 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 		ret = drm_universal_plane_init(&dev_priv->drm, &primary->base,
 					       0, &intel_plane_funcs,
 					       intel_primary_formats, num_formats,
-					       NULL,
+					       intel_format_modifiers,
 					       DRM_PLANE_TYPE_PRIMARY,
 					       "plane 1%c", pipe_name(pipe));
 	else if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
 		ret = drm_universal_plane_init(&dev_priv->drm, &primary->base,
 					       0, &intel_plane_funcs,
 					       intel_primary_formats, num_formats,
-					       NULL,
+					       intel_format_modifiers,
 					       DRM_PLANE_TYPE_PRIMARY,
 					       "primary %c", pipe_name(pipe));
 	else
 		ret = drm_universal_plane_init(&dev_priv->drm, &primary->base,
 					       0, &intel_plane_funcs,
 					       intel_primary_formats, num_formats,
-					       NULL,
+					       intel_format_modifiers,
 					       DRM_PLANE_TYPE_PRIMARY,
 					       "plane %c", plane_name(primary->plane));
 	if (ret)
@@ -13817,6 +13915,11 @@ intel_update_cursor_plane(struct drm_plane *plane,
 	intel_crtc_update_cursor(crtc, crtc_state, state);
 }

+static const uint64_t cursor_format_modifiers[] = {
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
 static struct intel_plane *
 intel_cursor_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 {
@@ -13852,7 +13955,8 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
 				       0, &intel_cursor_plane_funcs,
 				       intel_cursor_formats,
 				       ARRAY_SIZE(intel_cursor_formats),
-				       NULL, DRM_PLANE_TYPE_CURSOR,
+				       cursor_format_modifiers,
+				       DRM_PLANE_TYPE_CURSOR,
 				       "cursor %c", pipe_name(pipe));
 	if (ret)
 		goto fail;
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 9f2bdefdc690..bf18d9edc66f 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -1053,6 +1053,12 @@ static const uint32_t ilk_plane_formats[] = {
 	DRM_FORMAT_VYUY,
 };

+static const uint64_t i9xx_plane_format_modifiers[] = {
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
 static const uint32_t snb_plane_formats[] = {
 	DRM_FORMAT_XBGR8888,
 	DRM_FORMAT_XRGB8888,
@@ -1088,6 +1094,14 @@ static uint32_t skl_plane_formats[] = {
 	DRM_FORMAT_VYUY,
 };

+static const uint64_t skl_plane_format_modifiers[] = {
+	I915_FORMAT_MOD_Yf_TILED,
+	I915_FORMAT_MOD_Y_TILED,
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
 struct intel_plane *
 intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 			  enum pipe pipe, int plane)
@@ -1096,6 +1110,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 	struct intel_plane_state *state = NULL;
 	unsigned long possible_crtcs;
 	const uint32_t *plane_formats;
+	const uint64_t *modifiers;
 	unsigned int supported_rotations;
 	int num_plane_formats;
 	int ret;
@@ -1122,6 +1137,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,

 		plane_formats = skl_plane_formats;
 		num_plane_formats = ARRAY_SIZE(skl_plane_formats);
+		modifiers = skl_plane_format_modifiers;
 	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
 		intel_plane->can_scale = false;
 		intel_plane->max_downscale = 1;
@@ -1131,6 +1147,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,

 		plane_formats = vlv_plane_formats;
 		num_plane_formats = ARRAY_SIZE(vlv_plane_formats);
+		modifiers = i9xx_plane_format_modifiers;
 	} else if (INTEL_GEN(dev_priv) >= 7) {
 		if (IS_IVYBRIDGE(dev_priv)) {
 			intel_plane->can_scale = true;
@@ -1145,6 +1162,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,

 		plane_formats = snb_plane_formats;
 		num_plane_formats = ARRAY_SIZE(snb_plane_formats);
+		modifiers = i9xx_plane_format_modifiers;
 	} else {
 		intel_plane->can_scale = true;
 		intel_plane->max_downscale = 16;
@@ -1152,6 +1170,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 		intel_plane->update_plane = ilk_update_plane;
 		intel_plane->disable_plane = ilk_disable_plane;

+		modifiers = i9xx_plane_format_modifiers;
 		if (IS_GEN6(dev_priv)) {
 			plane_formats = snb_plane_formats;
 			num_plane_formats = ARRAY_SIZE(snb_plane_formats);
@@ -1186,13 +1205,15 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 		ret = drm_universal_plane_init(&dev_priv->drm, &intel_plane->base,
 					       possible_crtcs, &intel_plane_funcs,
 					       plane_formats, num_plane_formats,
-					       NULL, DRM_PLANE_TYPE_OVERLAY,
+					       modifiers,
+					       DRM_PLANE_TYPE_OVERLAY,
 					       "plane %d%c", plane + 2, pipe_name(pipe));
 	else
 		ret = drm_universal_plane_init(&dev_priv->drm, &intel_plane->base,
 					       possible_crtcs, &intel_plane_funcs,
 					       plane_formats, num_plane_formats,
-					       NULL, DRM_PLANE_TYPE_OVERLAY,
+					       modifiers,
+					       DRM_PLANE_TYPE_OVERLAY,
 					       "sprite %c", sprite_name(pipe, plane));
 	if (ret)
 		goto fail;
--
2.12.1


--
Ville Syrjälä
Intel OTC

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