[v5,3/3] drm/i915: Add format modifiers for Intel

Submitted by Ben Widawsky on May 16, 2017, 9:31 p.m.

Details

Message ID 20170516213126.8269-3-ben@bwidawsk.net
State New
Headers show
Series "Series without cover letter" ( rev: 1 ) in Intel GFX

Not browsing as part of any series.

Commit Message

Ben Widawsky May 16, 2017, 9:31 p.m.
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)

v4:
  - List each modifier explicitly in supported modifiers (Ville)
  - Handle the CURSOR plane (Ville)

v5:
  - Split out cursor and sprite handling (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Kristian H. Kristensen <hoegsberg@gmail.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/intel_display.c | 131 +++++++++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_sprite.c  |  76 +++++++++++++++++++-
 2 files changed, 201 insertions(+), 6 deletions(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9dd67d51e7c9..3519c10abcc3 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,
@@ -13381,6 +13395,103 @@  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:
+		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;
+	}
+}
+
+static bool intel_primary_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;
+}
+
+static bool intel_cursor_plane_format_mod_supported(struct drm_plane *plane,
+						    uint32_t format,
+						    uint64_t modifier)
+{
+	if (WARN_ON(modifier == DRM_FORMAT_MOD_INVALID))
+		return false;
+
+	return modifier == DRM_FORMAT_MOD_LINEAR && format == DRM_FORMAT_ARGB8888;
+}
+
 const struct drm_plane_funcs intel_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
@@ -13390,6 +13501,7 @@  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_primary_plane_format_mod_supported,
 };
 
 static int
@@ -13525,6 +13637,7 @@  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_cursor_plane_format_mod_supported,
 };
 
 static struct intel_plane *
@@ -13535,6 +13648,7 @@  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);
@@ -13573,18 +13687,21 @@  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 (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;
@@ -13594,21 +13711,21 @@  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)
@@ -13744,6 +13861,11 @@  intel_update_cursor_plane(struct drm_plane *plane,
 	intel_crtc_update_cursor(crtc, 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)
 {
@@ -13779,7 +13901,8 @@  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 053802dd08c1..e7c5c0a94bbd 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -30,6 +30,7 @@ 
  * support.
  */
 #include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_rect.h>
@@ -1032,6 +1033,12 @@  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,
@@ -1067,6 +1074,64 @@  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
+};
+
+static bool intel_sprite_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;
+
+	BUG_ON(plane->base.type != DRM_PLANE_TYPE_OVERLAY);
+
+	switch (format) {
+		case DRM_FORMAT_XBGR2101010:
+		case DRM_FORMAT_ABGR2101010:
+			if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+				return true;
+			break;
+		case DRM_FORMAT_RGB565:
+		case DRM_FORMAT_ABGR8888:
+		case DRM_FORMAT_ARGB8888:
+			if (INTEL_GEN(dev_priv) >= 9 || IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+				return true;
+			break;
+		case DRM_FORMAT_XBGR8888:
+			if (INTEL_GEN(dev_priv) >= 6)
+				return true;
+			break;
+		case DRM_FORMAT_XRGB8888:
+		case DRM_FORMAT_YUYV:
+		case DRM_FORMAT_YVYU:
+		case DRM_FORMAT_UYVY:
+		case DRM_FORMAT_VYUY:
+			return true;
+	}
+
+	return false;
+}
+
+const struct drm_plane_funcs intel_sprite_plane_funcs = {
+        .update_plane = drm_atomic_helper_update_plane,
+        .disable_plane = drm_atomic_helper_disable_plane,
+        .destroy = intel_plane_destroy,
+        .set_property = drm_atomic_helper_plane_set_property,
+        .atomic_get_property = intel_plane_atomic_get_property,
+        .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_sprite_plane_format_mod_supported,
+};
+
 struct intel_plane *
 intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 			  enum pipe pipe, int plane)
@@ -1075,6 +1140,7 @@  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;
@@ -1101,6 +1167,7 @@  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;
@@ -1110,6 +1177,7 @@  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;
@@ -1124,6 +1192,7 @@  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;
@@ -1131,6 +1200,7 @@  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);
@@ -1165,13 +1235,15 @@  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;

Comments

Hi Ben,

A couple of small questions/suggestions that I hope you find useful.
Please don't block any of this work based on my comments.

On 16 May 2017 at 22:31, Ben Widawsky <ben@bwidawsk.net> wrote:

> +static bool intel_primary_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);
> +
Nit: if you rewrite this as below, the control flow should be clearer.
Thus the 'return false;' at the end, will be [more] obvious that it's
unreachable ;-)

       if (INTEL_GEN(dev_priv) >= 9)
               return skl_mod_supported(format, modifier);

       if (INTEL_GEN(dev_priv) >= 4)
               return i965_mod_supported(format, modifier);

       return i8xx_mod_supported(format, modifier);


> +       return false;
> +}
> +


> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c

> +static bool intel_sprite_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;
> +
> +       BUG_ON(plane->base.type != DRM_PLANE_TYPE_OVERLAY);
> +
> +       switch (format) {
> +               case DRM_FORMAT_XBGR2101010:
> +               case DRM_FORMAT_ABGR2101010:
> +                       if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> +                               return true;
> +                       break;
> +               case DRM_FORMAT_RGB565:
> +               case DRM_FORMAT_ABGR8888:
> +               case DRM_FORMAT_ARGB8888:
> +                       if (INTEL_GEN(dev_priv) >= 9 || IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> +                               return true;
> +                       break;
> +               case DRM_FORMAT_XBGR8888:
> +                       if (INTEL_GEN(dev_priv) >= 6)
> +                               return true;
> +                       break;
> +               case DRM_FORMAT_XRGB8888:
> +               case DRM_FORMAT_YUYV:
> +               case DRM_FORMAT_YVYU:
> +               case DRM_FORMAT_UYVY:
> +               case DRM_FORMAT_VYUY:
> +                       return true;
> +       }
> +
> +       return false;
> +}
> +
> +const struct drm_plane_funcs intel_sprite_plane_funcs = {
> +        .update_plane = drm_atomic_helper_update_plane,
> +        .disable_plane = drm_atomic_helper_disable_plane,
> +        .destroy = intel_plane_destroy,
> +        .set_property = drm_atomic_helper_plane_set_property,
> +        .atomic_get_property = intel_plane_atomic_get_property,
> +        .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_sprite_plane_format_mod_supported,
> +};
> +
Having a dull moment - is intel_sprite_plane_funcs (+
intel_sprite_plane_format_mod_supported) unused or I'm seeing things?
If one is to keep it, for future work, perhaps it's worth adding a 2-3
word comment,

Regards,
Emil
On 17-05-17 01:20:50, Emil Velikov wrote:
>Hi Ben,
>
>A couple of small questions/suggestions that I hope you find useful.
>Please don't block any of this work based on my comments.
>
>On 16 May 2017 at 22:31, Ben Widawsky <ben@bwidawsk.net> wrote:
>
>> +static bool intel_primary_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);
>> +
>Nit: if you rewrite this as below, the control flow should be clearer.
>Thus the 'return false;' at the end, will be [more] obvious that it's
>unreachable ;-)
>
>       if (INTEL_GEN(dev_priv) >= 9)
>               return skl_mod_supported(format, modifier);
>
>       if (INTEL_GEN(dev_priv) >= 4)
>               return i965_mod_supported(format, modifier);
>
>       return i8xx_mod_supported(format, modifier);
>
>

It's a good point, however many other blocks of code do the same thing, and I
think the nature of if/else if/else implies unreachable. I can add
unreachable()... In fact, I just did.

>> +       return false;
>> +}
>> +
>
>
>> --- a/drivers/gpu/drm/i915/intel_sprite.c
>> +++ b/drivers/gpu/drm/i915/intel_sprite.c
>
>> +static bool intel_sprite_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;
>> +
>> +       BUG_ON(plane->base.type != DRM_PLANE_TYPE_OVERLAY);
>> +
>> +       switch (format) {
>> +               case DRM_FORMAT_XBGR2101010:
>> +               case DRM_FORMAT_ABGR2101010:
>> +                       if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
>> +                               return true;
>> +                       break;
>> +               case DRM_FORMAT_RGB565:
>> +               case DRM_FORMAT_ABGR8888:
>> +               case DRM_FORMAT_ARGB8888:
>> +                       if (INTEL_GEN(dev_priv) >= 9 || IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
>> +                               return true;
>> +                       break;
>> +               case DRM_FORMAT_XBGR8888:
>> +                       if (INTEL_GEN(dev_priv) >= 6)
>> +                               return true;
>> +                       break;
>> +               case DRM_FORMAT_XRGB8888:
>> +               case DRM_FORMAT_YUYV:
>> +               case DRM_FORMAT_YVYU:
>> +               case DRM_FORMAT_UYVY:
>> +               case DRM_FORMAT_VYUY:
>> +                       return true;
>> +       }
>> +
>> +       return false;
>> +}
>> +
>> +const struct drm_plane_funcs intel_sprite_plane_funcs = {
>> +        .update_plane = drm_atomic_helper_update_plane,
>> +        .disable_plane = drm_atomic_helper_disable_plane,
>> +        .destroy = intel_plane_destroy,
>> +        .set_property = drm_atomic_helper_plane_set_property,
>> +        .atomic_get_property = intel_plane_atomic_get_property,
>> +        .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_sprite_plane_format_mod_supported,
>> +};
>> +
>Having a dull moment - is intel_sprite_plane_funcs (+
>intel_sprite_plane_format_mod_supported) unused or I'm seeing things?
>If one is to keep it, for future work, perhaps it's worth adding a 2-3
>word comment,
>
>Regards,
>Emil

Not sure how this happened, it is a mistake. Thanks for spotting it. Here's what
I got locally:
On 18 May 2017 at 02:14, Ben Widawsky <ben@bwidawsk.net> wrote:
> On 17-05-17 01:20:50, Emil Velikov wrote:
>>
>> Hi Ben,
>>
>> A couple of small questions/suggestions that I hope you find useful.
>> Please don't block any of this work based on my comments.
>>
>> On 16 May 2017 at 22:31, Ben Widawsky <ben@bwidawsk.net> wrote:
>>
>>> +static bool intel_primary_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);
>>> +
>>
>> Nit: if you rewrite this as below, the control flow should be clearer.
>> Thus the 'return false;' at the end, will be [more] obvious that it's
>> unreachable ;-)
>>
>>       if (INTEL_GEN(dev_priv) >= 9)
>>               return skl_mod_supported(format, modifier);
>>
>>       if (INTEL_GEN(dev_priv) >= 4)
>>               return i965_mod_supported(format, modifier);
>>
>>       return i8xx_mod_supported(format, modifier);
>>
>>
>
> It's a good point, however many other blocks of code do the same thing, and
> I
> think the nature of if/else if/else implies unreachable. I can add
> unreachable()... In fact, I just did.
>
>
The "implies" argument is a bit odd, but that's just bikesheding, so
feel free to ignore me.

>>> +       return false;
>>> +}
>>> +
>>
>>
>>
>>> --- a/drivers/gpu/drm/i915/intel_sprite.c
>>> +++ b/drivers/gpu/drm/i915/intel_sprite.c
>>
>>
>>> +static bool intel_sprite_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;
>>> +
>>> +       BUG_ON(plane->base.type != DRM_PLANE_TYPE_OVERLAY);
>>> +
>>> +       switch (format) {
>>> +               case DRM_FORMAT_XBGR2101010:
>>> +               case DRM_FORMAT_ABGR2101010:
>>> +                       if (IS_VALLEYVIEW(dev_priv) ||
>>> IS_CHERRYVIEW(dev_priv))
>>> +                               return true;
>>> +                       break;
>>> +               case DRM_FORMAT_RGB565:
>>> +               case DRM_FORMAT_ABGR8888:
>>> +               case DRM_FORMAT_ARGB8888:
>>> +                       if (INTEL_GEN(dev_priv) >= 9 ||
>>> IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
>>> +                               return true;
>>> +                       break;
>>> +               case DRM_FORMAT_XBGR8888:
>>> +                       if (INTEL_GEN(dev_priv) >= 6)
>>> +                               return true;
>>> +                       break;
>>> +               case DRM_FORMAT_XRGB8888:
>>> +               case DRM_FORMAT_YUYV:
>>> +               case DRM_FORMAT_YVYU:
>>> +               case DRM_FORMAT_UYVY:
>>> +               case DRM_FORMAT_VYUY:
>>> +                       return true;
>>> +       }
>>> +
>>> +       return false;
>>> +}
>>> +
>>> +const struct drm_plane_funcs intel_sprite_plane_funcs = {
>>> +        .update_plane = drm_atomic_helper_update_plane,
>>> +        .disable_plane = drm_atomic_helper_disable_plane,
>>> +        .destroy = intel_plane_destroy,
>>> +        .set_property = drm_atomic_helper_plane_set_property,
>>> +        .atomic_get_property = intel_plane_atomic_get_property,
>>> +        .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_sprite_plane_format_mod_supported,
>>> +};
>>> +
>>
>> Having a dull moment - is intel_sprite_plane_funcs (+
>> intel_sprite_plane_format_mod_supported) unused or I'm seeing things?
>> If one is to keep it, for future work, perhaps it's worth adding a 2-3
>> word comment,
>>
>> Regards,
>> Emil
>
>
> Not sure how this happened, it is a mistake.
I've spotted an actual bug alongside my bikeshedding, Yay!

Fwiw
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

-Emil