Re: [Intel-gfx] [PATCH] drm/i915: Add plane alpha blending support, v2.
Quoting Maarten Lankhorst (2018-10-02 11:51:45)
> Op 23-08-18 om 00:57 schreef Matt Roper:
> > On Wed, Aug 15, 2018 at 12:34:05PM +0200, Maarten Lankhorst wrote:
> >> Add plane alpha blending support with the different blend modes.
> >> This has been tested on a icl to show the correct results,
> >> on earlier platforms small rounding errors cause issues. But this
> >> already happens case with fully transparant or fully opaque RGB
> >> fb's.
> >>
> >> The recommended HW workaround is to disable alpha blending when the
> >> plane alpha is 0 (transparant, hide plane) or 0xff (opaque, disable
> >> blending).
> >> This is easy to implement on any platform, so just do that.
> >>
> >> The tests for userspace are also available, and pass on gen11.
> >>
> >> Changes since v1:
> >> - Change mistaken < 0xff0 to 0xff00.
> >> - Only set PLANE_KEYMSK_ALPHA_ENABLE when plane alpha < 0xff00, ignore
> >> blend mode.
> >> - Rework disabling FBC when per pixel alpha is used.
> >>
> >> Signed-off-by: Maarten Lankhorst
> > One question and one minor suggestion inline below, but otherwise,
> >
> > Reviewed-by: Matt Roper
> >
> >> ---
> >> drivers/gpu/drm/i915/i915_drv.h | 2 +
> >> drivers/gpu/drm/i915/i915_reg.h | 2 +
> >> drivers/gpu/drm/i915/intel_display.c | 58 +++-
> >> drivers/gpu/drm/i915/intel_fbc.c | 8
> >> drivers/gpu/drm/i915/intel_sprite.c | 23 ++-
> >> 5 files changed, 73 insertions(+), 20 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/i915/i915_drv.h
> >> b/drivers/gpu/drm/i915/i915_drv.h
> >> index 3fa56b960ef2..29f75da5fa8c 100644
> >> --- a/drivers/gpu/drm/i915/i915_drv.h
> >> +++ b/drivers/gpu/drm/i915/i915_drv.h
> >> @@ -545,6 +545,8 @@ struct intel_fbc {
> >> int adjusted_y;
> >>
> >> int y;
> >> +
> >> +uint16_t pixel_blend_mode;
> >> } plane;
> >>
> >> struct {
> >> diff --git a/drivers/gpu/drm/i915/i915_reg.h
> >> b/drivers/gpu/drm/i915/i915_reg.h
> >> index 0c9f03dda569..93a1d87cdeb2 100644
> >> --- a/drivers/gpu/drm/i915/i915_reg.h
> >> +++ b/drivers/gpu/drm/i915/i915_reg.h
> >> @@ -6561,8 +6561,10 @@ enum {
> >> #define _PLANE_KEYVAL_2_A 0x70294
> >> #define _PLANE_KEYMSK_1_A 0x70198
> >> #define _PLANE_KEYMSK_2_A 0x70298
> >> +#define PLANE_KEYMSK_ALPHA_ENABLE (1 << 31)
> >> #define _PLANE_KEYMAX_1_A 0x701a0
> >> #define _PLANE_KEYMAX_2_A 0x702a0
> >> +#define PLANE_KEYMAX_ALPHA_SHIFT 24
> >> #define _PLANE_AUX_DIST_1_A 0x701c0
> >> #define _PLANE_AUX_DIST_2_A 0x702c0
> >> #define _PLANE_AUX_OFFSET_1_A 0x701c4
> >> diff --git a/drivers/gpu/drm/i915/intel_display.c
> >> b/drivers/gpu/drm/i915/intel_display.c
> >> index a0345e7d3c2b..aedad3674b0d 100644
> >> --- a/drivers/gpu/drm/i915/intel_display.c
> >> +++ b/drivers/gpu/drm/i915/intel_display.c
> >> @@ -3167,6 +3167,12 @@ int skl_check_plane_surface(const struct
> >> intel_crtc_state *crtc_state,
> >> return -EINVAL;
> >> }
> >>
> >> +/* HW only has 8 bits pixel precision, disable plane if invisible */
> >> +if (!(plane_state->base.alpha >> 8)) {
> >> +plane_state->base.visible = false;
> >> +return 0;
> >> +}
> >> +
> >> if (!plane_state->base.visible)
> >> return 0;
> >>
> >> @@ -3512,30 +3518,39 @@ static u32 skl_plane_ctl_format(uint32_t
> >> pixel_format)
> >> return 0;
> >> }
> >>
> >> -/*
> >> - * XXX: For ARBG/ABGR formats we default to expecting scanout buffers
> >> - * to be already pre-multiplied. We need to add a knob (or a different
> >> - * DRM_FORMAT) for user-space to configure that.
> >> - */
> >> -static u32 skl_plane_ctl_alpha(uint32_t pixel_format)
> >> +static u32 skl_plane_ctl_alpha(const struct intel_plane_state
> >> *plane_state)
> >> {
> >> -switch (pixel_format) {
> >> -case DRM_FORMAT_ABGR:
> >> -case DRM_FORMAT_ARGB:
> >> +if (!plane_state->base.fb->format->has_alpha)
> >> +return PLANE_CTL_ALPHA_DISABLE;
> >> +
> >> +switch (plane_state->base.pixel_blend_mode) {
> >> +case DRM_MODE_BLEND_PIXEL_NONE:
> >> +return PLANE_CTL_ALPHA_DISABLE;
> >> +case DRM_MODE_BLEND_PREMULTI:
> >> return PLANE_CTL_ALPHA_SW_PREMULTIPLY;
> >> +case DRM_MODE_BLEND_COVERAGE:
> >> +return PLANE_CTL_ALPHA_HW_PREMULTIPLY;
> >> default:
> >> -return PLANE_CTL_ALPHA_DISABLE;
> >> +MISSING_CASE(plane_state->base.pixel_blend_mode);
> >> +return 0;
> > Maybe just add the MISSING_CASE line before the current return? The
> > macro still expands to 0, so leaving that makes it slightly more clear
> > what the default fallback is. Same for the glk_ function below.
> >
> >> }
> >> }
> >>
> >>
Re: [PATCH] drm/i915: Add plane alpha blending support, v2.
Op 23-08-18 om 00:57 schreef Matt Roper:
> On Wed, Aug 15, 2018 at 12:34:05PM +0200, Maarten Lankhorst wrote:
>> Add plane alpha blending support with the different blend modes.
>> This has been tested on a icl to show the correct results,
>> on earlier platforms small rounding errors cause issues. But this
>> already happens case with fully transparant or fully opaque RGB
>> fb's.
>>
>> The recommended HW workaround is to disable alpha blending when the
>> plane alpha is 0 (transparant, hide plane) or 0xff (opaque, disable
>> blending).
>> This is easy to implement on any platform, so just do that.
>>
>> The tests for userspace are also available, and pass on gen11.
>>
>> Changes since v1:
>> - Change mistaken < 0xff0 to 0xff00.
>> - Only set PLANE_KEYMSK_ALPHA_ENABLE when plane alpha < 0xff00, ignore blend
>> mode.
>> - Rework disabling FBC when per pixel alpha is used.
>>
>> Signed-off-by: Maarten Lankhorst
> One question and one minor suggestion inline below, but otherwise,
>
> Reviewed-by: Matt Roper
>
>> ---
>> drivers/gpu/drm/i915/i915_drv.h | 2 +
>> drivers/gpu/drm/i915/i915_reg.h | 2 +
>> drivers/gpu/drm/i915/intel_display.c | 58 +++-
>> drivers/gpu/drm/i915/intel_fbc.c | 8
>> drivers/gpu/drm/i915/intel_sprite.c | 23 ++-
>> 5 files changed, 73 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h
>> b/drivers/gpu/drm/i915/i915_drv.h
>> index 3fa56b960ef2..29f75da5fa8c 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -545,6 +545,8 @@ struct intel_fbc {
>> int adjusted_y;
>>
>> int y;
>> +
>> +uint16_t pixel_blend_mode;
>> } plane;
>>
>> struct {
>> diff --git a/drivers/gpu/drm/i915/i915_reg.h
>> b/drivers/gpu/drm/i915/i915_reg.h
>> index 0c9f03dda569..93a1d87cdeb2 100644
>> --- a/drivers/gpu/drm/i915/i915_reg.h
>> +++ b/drivers/gpu/drm/i915/i915_reg.h
>> @@ -6561,8 +6561,10 @@ enum {
>> #define _PLANE_KEYVAL_2_A 0x70294
>> #define _PLANE_KEYMSK_1_A 0x70198
>> #define _PLANE_KEYMSK_2_A 0x70298
>> +#define PLANE_KEYMSK_ALPHA_ENABLE (1 << 31)
>> #define _PLANE_KEYMAX_1_A 0x701a0
>> #define _PLANE_KEYMAX_2_A 0x702a0
>> +#define PLANE_KEYMAX_ALPHA_SHIFT 24
>> #define _PLANE_AUX_DIST_1_A 0x701c0
>> #define _PLANE_AUX_DIST_2_A 0x702c0
>> #define _PLANE_AUX_OFFSET_1_A 0x701c4
>> diff --git a/drivers/gpu/drm/i915/intel_display.c
>> b/drivers/gpu/drm/i915/intel_display.c
>> index a0345e7d3c2b..aedad3674b0d 100644
>> --- a/drivers/gpu/drm/i915/intel_display.c
>> +++ b/drivers/gpu/drm/i915/intel_display.c
>> @@ -3167,6 +3167,12 @@ int skl_check_plane_surface(const struct
>> intel_crtc_state *crtc_state,
>> return -EINVAL;
>> }
>>
>> +/* HW only has 8 bits pixel precision, disable plane if invisible */
>> +if (!(plane_state->base.alpha >> 8)) {
>> +plane_state->base.visible = false;
>> +return 0;
>> +}
>> +
>> if (!plane_state->base.visible)
>> return 0;
>>
>> @@ -3512,30 +3518,39 @@ static u32 skl_plane_ctl_format(uint32_t
>> pixel_format)
>> return 0;
>> }
>>
>> -/*
>> - * XXX: For ARBG/ABGR formats we default to expecting scanout buffers
>> - * to be already pre-multiplied. We need to add a knob (or a different
>> - * DRM_FORMAT) for user-space to configure that.
>> - */
>> -static u32 skl_plane_ctl_alpha(uint32_t pixel_format)
>> +static u32 skl_plane_ctl_alpha(const struct intel_plane_state *plane_state)
>> {
>> -switch (pixel_format) {
>> -case DRM_FORMAT_ABGR:
>> -case DRM_FORMAT_ARGB:
>> +if (!plane_state->base.fb->format->has_alpha)
>> +return PLANE_CTL_ALPHA_DISABLE;
>> +
>> +switch (plane_state->base.pixel_blend_mode) {
>> +case DRM_MODE_BLEND_PIXEL_NONE:
>> +return PLANE_CTL_ALPHA_DISABLE;
>> +case DRM_MODE_BLEND_PREMULTI:
>> return PLANE_CTL_ALPHA_SW_PREMULTIPLY;
>> +case DRM_MODE_BLEND_COVERAGE:
>> +return PLANE_CTL_ALPHA_HW_PREMULTIPLY;
>> default:
>> -return PLANE_CTL_ALPHA_DISABLE;
>> +MISSING_CASE(plane_state->base.pixel_blend_mode);
>> +return 0;
> Maybe just add the MISSING_CASE line before the current return? The
> macro still expands to 0, so leaving that makes it slightly more clear
> what the default fallback is. Same for the glk_ function below.
>
>> }
>> }
>>
>> -static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
>> +static u32 glk_plane_color_ctl_alpha(const struct intel_plane_state
>> *plane_state)
>> {
>> -switch (pixel_format) {
>> -case DRM_FORMAT_ABGR:
>> -case DRM_FORMAT_ARGB:
>> +if
Re: [PATCH] drm/i915: Add plane alpha blending support, v2.
Op 23-08-18 om 00:57 schreef Matt Roper:
> On Wed, Aug 15, 2018 at 12:34:05PM +0200, Maarten Lankhorst wrote:
>> Add plane alpha blending support with the different blend modes.
>> This has been tested on a icl to show the correct results,
>> on earlier platforms small rounding errors cause issues. But this
>> already happens case with fully transparant or fully opaque RGB
>> fb's.
>>
>> The recommended HW workaround is to disable alpha blending when the
>> plane alpha is 0 (transparant, hide plane) or 0xff (opaque, disable
>> blending).
>> This is easy to implement on any platform, so just do that.
>>
>> The tests for userspace are also available, and pass on gen11.
>>
>> Changes since v1:
>> - Change mistaken < 0xff0 to 0xff00.
>> - Only set PLANE_KEYMSK_ALPHA_ENABLE when plane alpha < 0xff00, ignore blend
>> mode.
>> - Rework disabling FBC when per pixel alpha is used.
>>
>> Signed-off-by: Maarten Lankhorst
> One question and one minor suggestion inline below, but otherwise,
>
> Reviewed-by: Matt Roper
>
>> ---
>> drivers/gpu/drm/i915/i915_drv.h | 2 +
>> drivers/gpu/drm/i915/i915_reg.h | 2 +
>> drivers/gpu/drm/i915/intel_display.c | 58 +++-
>> drivers/gpu/drm/i915/intel_fbc.c | 8
>> drivers/gpu/drm/i915/intel_sprite.c | 23 ++-
>> 5 files changed, 73 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h
>> b/drivers/gpu/drm/i915/i915_drv.h
>> index 3fa56b960ef2..29f75da5fa8c 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -545,6 +545,8 @@ struct intel_fbc {
>> int adjusted_y;
>>
>> int y;
>> +
>> +uint16_t pixel_blend_mode;
>> } plane;
>>
>> struct {
>> diff --git a/drivers/gpu/drm/i915/i915_reg.h
>> b/drivers/gpu/drm/i915/i915_reg.h
>> index 0c9f03dda569..93a1d87cdeb2 100644
>> --- a/drivers/gpu/drm/i915/i915_reg.h
>> +++ b/drivers/gpu/drm/i915/i915_reg.h
>> @@ -6561,8 +6561,10 @@ enum {
>> #define _PLANE_KEYVAL_2_A 0x70294
>> #define _PLANE_KEYMSK_1_A 0x70198
>> #define _PLANE_KEYMSK_2_A 0x70298
>> +#define PLANE_KEYMSK_ALPHA_ENABLE (1 << 31)
>> #define _PLANE_KEYMAX_1_A 0x701a0
>> #define _PLANE_KEYMAX_2_A 0x702a0
>> +#define PLANE_KEYMAX_ALPHA_SHIFT 24
>> #define _PLANE_AUX_DIST_1_A 0x701c0
>> #define _PLANE_AUX_DIST_2_A 0x702c0
>> #define _PLANE_AUX_OFFSET_1_A 0x701c4
>> diff --git a/drivers/gpu/drm/i915/intel_display.c
>> b/drivers/gpu/drm/i915/intel_display.c
>> index a0345e7d3c2b..aedad3674b0d 100644
>> --- a/drivers/gpu/drm/i915/intel_display.c
>> +++ b/drivers/gpu/drm/i915/intel_display.c
>> @@ -3167,6 +3167,12 @@ int skl_check_plane_surface(const struct
>> intel_crtc_state *crtc_state,
>> return -EINVAL;
>> }
>>
>> +/* HW only has 8 bits pixel precision, disable plane if invisible */
>> +if (!(plane_state->base.alpha >> 8)) {
>> +plane_state->base.visible = false;
>> +return 0;
>> +}
>> +
>> if (!plane_state->base.visible)
>> return 0;
>>
>> @@ -3512,30 +3518,39 @@ static u32 skl_plane_ctl_format(uint32_t
>> pixel_format)
>> return 0;
>> }
>>
>> -/*
>> - * XXX: For ARBG/ABGR formats we default to expecting scanout buffers
>> - * to be already pre-multiplied. We need to add a knob (or a different
>> - * DRM_FORMAT) for user-space to configure that.
>> - */
>> -static u32 skl_plane_ctl_alpha(uint32_t pixel_format)
>> +static u32 skl_plane_ctl_alpha(const struct intel_plane_state *plane_state)
>> {
>> -switch (pixel_format) {
>> -case DRM_FORMAT_ABGR:
>> -case DRM_FORMAT_ARGB:
>> +if (!plane_state->base.fb->format->has_alpha)
>> +return PLANE_CTL_ALPHA_DISABLE;
>> +
>> +switch (plane_state->base.pixel_blend_mode) {
>> +case DRM_MODE_BLEND_PIXEL_NONE:
>> +return PLANE_CTL_ALPHA_DISABLE;
>> +case DRM_MODE_BLEND_PREMULTI:
>> return PLANE_CTL_ALPHA_SW_PREMULTIPLY;
>> +case DRM_MODE_BLEND_COVERAGE:
>> +return PLANE_CTL_ALPHA_HW_PREMULTIPLY;
>> default:
>> -return PLANE_CTL_ALPHA_DISABLE;
>> +MISSING_CASE(plane_state->base.pixel_blend_mode);
>> +return 0;
> Maybe just add the MISSING_CASE line before the current return? The
> macro still expands to 0, so leaving that makes it slightly more clear
> what the default fallback is. Same for the glk_ function below.
Makes sense, will change that in v3. :)
>> }
>> }
>>
>> -static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
>> +static u32 glk_plane_color_ctl_alpha(const struct intel_plane_state
>> *plane_state)
>> {
>> -switch (pixel_format) {
>> -case DRM_FORMAT_ABGR:
>> -case DRM_FORMAT_ARGB:
>> +
Re: [PATCH] drm/i915: Add plane alpha blending support, v2.
On Wed, Aug 15, 2018 at 12:34:05PM +0200, Maarten Lankhorst wrote:
> Add plane alpha blending support with the different blend modes.
> This has been tested on a icl to show the correct results,
> on earlier platforms small rounding errors cause issues. But this
> already happens case with fully transparant or fully opaque RGB
> fb's.
>
> The recommended HW workaround is to disable alpha blending when the
> plane alpha is 0 (transparant, hide plane) or 0xff (opaque, disable blending).
> This is easy to implement on any platform, so just do that.
>
> The tests for userspace are also available, and pass on gen11.
>
> Changes since v1:
> - Change mistaken < 0xff0 to 0xff00.
> - Only set PLANE_KEYMSK_ALPHA_ENABLE when plane alpha < 0xff00, ignore blend
> mode.
> - Rework disabling FBC when per pixel alpha is used.
>
> Signed-off-by: Maarten Lankhorst
One question and one minor suggestion inline below, but otherwise,
Reviewed-by: Matt Roper
> ---
> drivers/gpu/drm/i915/i915_drv.h | 2 +
> drivers/gpu/drm/i915/i915_reg.h | 2 +
> drivers/gpu/drm/i915/intel_display.c | 58 +++-
> drivers/gpu/drm/i915/intel_fbc.c | 8
> drivers/gpu/drm/i915/intel_sprite.c | 23 ++-
> 5 files changed, 73 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 3fa56b960ef2..29f75da5fa8c 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -545,6 +545,8 @@ struct intel_fbc {
> int adjusted_y;
>
> int y;
> +
> + uint16_t pixel_blend_mode;
> } plane;
>
> struct {
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 0c9f03dda569..93a1d87cdeb2 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6561,8 +6561,10 @@ enum {
> #define _PLANE_KEYVAL_2_A0x70294
> #define _PLANE_KEYMSK_1_A0x70198
> #define _PLANE_KEYMSK_2_A0x70298
> +#define PLANE_KEYMSK_ALPHA_ENABLE (1 << 31)
> #define _PLANE_KEYMAX_1_A0x701a0
> #define _PLANE_KEYMAX_2_A0x702a0
> +#define PLANE_KEYMAX_ALPHA_SHIFT24
> #define _PLANE_AUX_DIST_1_A 0x701c0
> #define _PLANE_AUX_DIST_2_A 0x702c0
> #define _PLANE_AUX_OFFSET_1_A0x701c4
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index a0345e7d3c2b..aedad3674b0d 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3167,6 +3167,12 @@ int skl_check_plane_surface(const struct
> intel_crtc_state *crtc_state,
> return -EINVAL;
> }
>
> + /* HW only has 8 bits pixel precision, disable plane if invisible */
> + if (!(plane_state->base.alpha >> 8)) {
> + plane_state->base.visible = false;
> + return 0;
> + }
> +
> if (!plane_state->base.visible)
> return 0;
>
> @@ -3512,30 +3518,39 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
> return 0;
> }
>
> -/*
> - * XXX: For ARBG/ABGR formats we default to expecting scanout buffers
> - * to be already pre-multiplied. We need to add a knob (or a different
> - * DRM_FORMAT) for user-space to configure that.
> - */
> -static u32 skl_plane_ctl_alpha(uint32_t pixel_format)
> +static u32 skl_plane_ctl_alpha(const struct intel_plane_state *plane_state)
> {
> - switch (pixel_format) {
> - case DRM_FORMAT_ABGR:
> - case DRM_FORMAT_ARGB:
> + if (!plane_state->base.fb->format->has_alpha)
> + return PLANE_CTL_ALPHA_DISABLE;
> +
> + switch (plane_state->base.pixel_blend_mode) {
> + case DRM_MODE_BLEND_PIXEL_NONE:
> + return PLANE_CTL_ALPHA_DISABLE;
> + case DRM_MODE_BLEND_PREMULTI:
> return PLANE_CTL_ALPHA_SW_PREMULTIPLY;
> + case DRM_MODE_BLEND_COVERAGE:
> + return PLANE_CTL_ALPHA_HW_PREMULTIPLY;
> default:
> - return PLANE_CTL_ALPHA_DISABLE;
> + MISSING_CASE(plane_state->base.pixel_blend_mode);
> + return 0;
Maybe just add the MISSING_CASE line before the current return? The
macro still expands to 0, so leaving that makes it slightly more clear
what the default fallback is. Same for the glk_ function below.
> }
> }
>
> -static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
> +static u32 glk_plane_color_ctl_alpha(const struct intel_plane_state
> *plane_state)
> {
> - switch (pixel_format) {
> - case DRM_FORMAT_ABGR:
> - case DRM_FORMAT_ARGB:
> + if (!plane_state->base.fb->format->has_alpha)
> + return PLANE_COLOR_ALPHA_DISABLE;
> +
> + switch (plane_state->base.pixel_blend_mode) {
> + case
[PATCH] drm/i915: Add plane alpha blending support, v2.
Add plane alpha blending support with the different blend modes.
This has been tested on a icl to show the correct results,
on earlier platforms small rounding errors cause issues. But this
already happens case with fully transparant or fully opaque RGB
fb's.
The recommended HW workaround is to disable alpha blending when the
plane alpha is 0 (transparant, hide plane) or 0xff (opaque, disable blending).
This is easy to implement on any platform, so just do that.
The tests for userspace are also available, and pass on gen11.
Changes since v1:
- Change mistaken < 0xff0 to 0xff00.
- Only set PLANE_KEYMSK_ALPHA_ENABLE when plane alpha < 0xff00, ignore blend
mode.
- Rework disabling FBC when per pixel alpha is used.
Signed-off-by: Maarten Lankhorst
---
drivers/gpu/drm/i915/i915_drv.h | 2 +
drivers/gpu/drm/i915/i915_reg.h | 2 +
drivers/gpu/drm/i915/intel_display.c | 58 +++-
drivers/gpu/drm/i915/intel_fbc.c | 8
drivers/gpu/drm/i915/intel_sprite.c | 23 ++-
5 files changed, 73 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 3fa56b960ef2..29f75da5fa8c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -545,6 +545,8 @@ struct intel_fbc {
int adjusted_y;
int y;
+
+ uint16_t pixel_blend_mode;
} plane;
struct {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 0c9f03dda569..93a1d87cdeb2 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6561,8 +6561,10 @@ enum {
#define _PLANE_KEYVAL_2_A 0x70294
#define _PLANE_KEYMSK_1_A 0x70198
#define _PLANE_KEYMSK_2_A 0x70298
+#define PLANE_KEYMSK_ALPHA_ENABLE (1 << 31)
#define _PLANE_KEYMAX_1_A 0x701a0
#define _PLANE_KEYMAX_2_A 0x702a0
+#define PLANE_KEYMAX_ALPHA_SHIFT 24
#define _PLANE_AUX_DIST_1_A0x701c0
#define _PLANE_AUX_DIST_2_A0x702c0
#define _PLANE_AUX_OFFSET_1_A 0x701c4
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index a0345e7d3c2b..aedad3674b0d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3167,6 +3167,12 @@ int skl_check_plane_surface(const struct
intel_crtc_state *crtc_state,
return -EINVAL;
}
+ /* HW only has 8 bits pixel precision, disable plane if invisible */
+ if (!(plane_state->base.alpha >> 8)) {
+ plane_state->base.visible = false;
+ return 0;
+ }
+
if (!plane_state->base.visible)
return 0;
@@ -3512,30 +3518,39 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
return 0;
}
-/*
- * XXX: For ARBG/ABGR formats we default to expecting scanout buffers
- * to be already pre-multiplied. We need to add a knob (or a different
- * DRM_FORMAT) for user-space to configure that.
- */
-static u32 skl_plane_ctl_alpha(uint32_t pixel_format)
+static u32 skl_plane_ctl_alpha(const struct intel_plane_state *plane_state)
{
- switch (pixel_format) {
- case DRM_FORMAT_ABGR:
- case DRM_FORMAT_ARGB:
+ if (!plane_state->base.fb->format->has_alpha)
+ return PLANE_CTL_ALPHA_DISABLE;
+
+ switch (plane_state->base.pixel_blend_mode) {
+ case DRM_MODE_BLEND_PIXEL_NONE:
+ return PLANE_CTL_ALPHA_DISABLE;
+ case DRM_MODE_BLEND_PREMULTI:
return PLANE_CTL_ALPHA_SW_PREMULTIPLY;
+ case DRM_MODE_BLEND_COVERAGE:
+ return PLANE_CTL_ALPHA_HW_PREMULTIPLY;
default:
- return PLANE_CTL_ALPHA_DISABLE;
+ MISSING_CASE(plane_state->base.pixel_blend_mode);
+ return 0;
}
}
-static u32 glk_plane_color_ctl_alpha(uint32_t pixel_format)
+static u32 glk_plane_color_ctl_alpha(const struct intel_plane_state
*plane_state)
{
- switch (pixel_format) {
- case DRM_FORMAT_ABGR:
- case DRM_FORMAT_ARGB:
+ if (!plane_state->base.fb->format->has_alpha)
+ return PLANE_COLOR_ALPHA_DISABLE;
+
+ switch (plane_state->base.pixel_blend_mode) {
+ case DRM_MODE_BLEND_PIXEL_NONE:
+ return PLANE_COLOR_ALPHA_DISABLE;
+ case DRM_MODE_BLEND_PREMULTI:
return PLANE_COLOR_ALPHA_SW_PREMULTIPLY;
+ case DRM_MODE_BLEND_COVERAGE:
+ return PLANE_COLOR_ALPHA_HW_PREMULTIPLY;
default:
- return PLANE_COLOR_ALPHA_DISABLE;
+ MISSING_CASE(plane_state->base.pixel_blend_mode);
+ return 0;
}
}
@@ -3611,7 +3626,7 @@ u32 skl_plane_ctl(const struct intel_crtc_state
