2022-11-15 20:43:51

by Hamza Mahfooz

[permalink] [raw]
Subject: [PATCH] drm/amd/display: add FB_DAMAGE_CLIPS support

Currently, userspace doesn't have a way to communicate selective updates
to displays. So, enable support for FB_DAMAGE_CLIPS for DCN ASICs newer
than DCN301, convert DRM damage clips to dc dirty rectangles and fill
them into dirty_rects in fill_dc_dirty_rects().

Signed-off-by: Hamza Mahfooz <[email protected]>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 91 +++++++++++--------
.../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 4 +
2 files changed, 58 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 185d09c760ba..18b710ba802d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -4842,6 +4842,31 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
return 0;
}

+static inline void fill_dc_dirty_rect(struct drm_plane *plane,
+ struct rect *dirty_rect, int32_t x,
+ int32_t y, int32_t width, int32_t height,
+ int *i, bool ffu)
+{
+ WARN_ON(*i >= DC_MAX_DIRTY_RECTS);
+
+ dirty_rect->x = x;
+ dirty_rect->y = y;
+ dirty_rect->width = width;
+ dirty_rect->height = height;
+
+ if (ffu)
+ drm_dbg(plane->dev,
+ "[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n",
+ plane->base.id, width, height);
+ else
+ drm_dbg(plane->dev,
+ "[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)",
+ plane->base.id, x, y, width, height);
+
+ (*i)++;
+}
+
+
/**
* fill_dc_dirty_rects() - Fill DC dirty regions for PSR selective updates
*
@@ -4862,10 +4887,6 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
* addition, certain use cases - such as cursor and multi-plane overlay (MPO) -
* implicitly provide damage clips without any client support via the plane
* bounds.
- *
- * Today, amdgpu_dm only supports the MPO and cursor usecase.
- *
- * TODO: Also enable for FB_DAMAGE_CLIPS
*/
static void fill_dc_dirty_rects(struct drm_plane *plane,
struct drm_plane_state *old_plane_state,
@@ -4876,12 +4897,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state);
struct rect *dirty_rects = flip_addrs->dirty_rects;
uint32_t num_clips;
+ struct drm_mode_rect *clips;
bool bb_changed;
bool fb_changed;
uint32_t i = 0;

- flip_addrs->dirty_rect_count = 0;
-
/*
* Cursor plane has it's own dirty rect update interface. See
* dcn10_dmub_update_cursor_data and dmub_cmd_update_cursor_info_data
@@ -4894,15 +4914,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
* requested, and there is a plane update, do FFU.
*/
if (!dm_crtc_state->mpo_requested) {
- dirty_rects[0].x = 0;
- dirty_rects[0].y = 0;
- dirty_rects[0].width = dm_crtc_state->base.mode.crtc_hdisplay;
- dirty_rects[0].height = dm_crtc_state->base.mode.crtc_vdisplay;
- flip_addrs->dirty_rect_count = 1;
- DRM_DEBUG_DRIVER("[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n",
- new_plane_state->plane->base.id,
- dm_crtc_state->base.mode.crtc_hdisplay,
- dm_crtc_state->base.mode.crtc_vdisplay);
+ fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[0], 0,
+ 0, dm_crtc_state->base.mode.crtc_hdisplay,
+ dm_crtc_state->base.mode.crtc_vdisplay, &i,
+ true);
+ flip_addrs->dirty_rect_count = i;
return;
}

@@ -4914,6 +4930,7 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
* rects.
*/
num_clips = drm_plane_get_damage_clips_count(new_plane_state);
+ clips = drm_plane_get_damage_clips(new_plane_state);
fb_changed = old_plane_state->fb->base.id !=
new_plane_state->fb->base.id;
bb_changed = (old_plane_state->crtc_x != new_plane_state->crtc_x ||
@@ -4921,33 +4938,33 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
old_plane_state->crtc_w != new_plane_state->crtc_w ||
old_plane_state->crtc_h != new_plane_state->crtc_h);

- DRM_DEBUG_DRIVER("[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n",
- new_plane_state->plane->base.id,
- bb_changed, fb_changed, num_clips);
+ drm_dbg(plane->dev,
+ "[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n",
+ new_plane_state->plane->base.id,
+ bb_changed, fb_changed, num_clips);

- if (num_clips || fb_changed || bb_changed) {
- dirty_rects[i].x = new_plane_state->crtc_x;
- dirty_rects[i].y = new_plane_state->crtc_y;
- dirty_rects[i].width = new_plane_state->crtc_w;
- dirty_rects[i].height = new_plane_state->crtc_h;
- DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n",
- new_plane_state->plane->base.id,
- dirty_rects[i].x, dirty_rects[i].y,
- dirty_rects[i].width, dirty_rects[i].height);
- i += 1;
+ if (num_clips) {
+ for (; i < num_clips; i++, clips++) {
+ fill_dc_dirty_rect(new_plane_state->plane,
+ &dirty_rects[i], clips->x1,
+ clips->y1, clips->x2 - clips->x1,
+ clips->y2 - clips->y1, &i, false);
+ }
+ } else if (fb_changed || bb_changed) {
+ fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
+ new_plane_state->crtc_x,
+ new_plane_state->crtc_y,
+ new_plane_state->crtc_w,
+ new_plane_state->crtc_h, &i, false);
}

/* Add old plane bounding-box if plane is moved or resized */
if (bb_changed) {
- dirty_rects[i].x = old_plane_state->crtc_x;
- dirty_rects[i].y = old_plane_state->crtc_y;
- dirty_rects[i].width = old_plane_state->crtc_w;
- dirty_rects[i].height = old_plane_state->crtc_h;
- DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n",
- old_plane_state->plane->base.id,
- dirty_rects[i].x, dirty_rects[i].y,
- dirty_rects[i].width, dirty_rects[i].height);
- i += 1;
+ fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
+ old_plane_state->crtc_x,
+ old_plane_state->crtc_y,
+ old_plane_state->crtc_w,
+ old_plane_state->crtc_h, &i, false);
}

flip_addrs->dirty_rect_count = i;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index e6854f7270a6..3c50b3ff7954 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1600,6 +1600,10 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
supported_rotations);

+ if (dm->adev->ip_versions[DCE_HWIP][0] > IP_VERSION(3, 0, 1) &&
+ plane->type != DRM_PLANE_TYPE_CURSOR)
+ drm_plane_enable_fb_damage_clips(plane);
+
drm_plane_helper_add(plane, &dm_plane_helper_funcs);

#ifdef CONFIG_DRM_AMD_DC_HDR
--
2.38.1



2022-11-17 17:40:40

by Leo Li

[permalink] [raw]
Subject: Re: [PATCH] drm/amd/display: add FB_DAMAGE_CLIPS support



On 11/15/22 15:24, Hamza Mahfooz wrote:
> Currently, userspace doesn't have a way to communicate selective updates
> to displays. So, enable support for FB_DAMAGE_CLIPS for DCN ASICs newer
> than DCN301, convert DRM damage clips to dc dirty rectangles and fill
> them into dirty_rects in fill_dc_dirty_rects().
>
> Signed-off-by: Hamza Mahfooz <[email protected]>
> ---
> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 91 +++++++++++--------
> .../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 4 +
> 2 files changed, 58 insertions(+), 37 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 185d09c760ba..18b710ba802d 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -4842,6 +4842,31 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
> return 0;
> }
>
> +static inline void fill_dc_dirty_rect(struct drm_plane *plane,
> + struct rect *dirty_rect, int32_t x,
> + int32_t y, int32_t width, int32_t height,
> + int *i, bool ffu)
> +{
> + WARN_ON(*i >= DC_MAX_DIRTY_RECTS);

Hi Hamza,

Since dc_flip_addrs->dirty_rects has a fixed length of
DC_MAX_DIRTY_RECTS per pipe (a restriction by DMUB FW), I think it makes
more sense to fallback to a full-frame-update (FFU) if num_clips >
DC_MAX_DIRTY_RECTS. An alternative would be to reject the atomic commit,
but that sounds heavy handed.


> +
> + dirty_rect->x = x;
> + dirty_rect->y = y;
> + dirty_rect->width = width;
> + dirty_rect->height = height;
> +
> + if (ffu)
> + drm_dbg(plane->dev,
> + "[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n",
> + plane->base.id, width, height);
> + else
> + drm_dbg(plane->dev,
> + "[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)",
> + plane->base.id, x, y, width, height);
> +
> + (*i)++;
> +}
> +
> +
> /**
> * fill_dc_dirty_rects() - Fill DC dirty regions for PSR selective updates
> *
> @@ -4862,10 +4887,6 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
> * addition, certain use cases - such as cursor and multi-plane overlay (MPO) -
> * implicitly provide damage clips without any client support via the plane
> * bounds.
> - *
> - * Today, amdgpu_dm only supports the MPO and cursor usecase.
> - *
> - * TODO: Also enable for FB_DAMAGE_CLIPS
> */
> static void fill_dc_dirty_rects(struct drm_plane *plane,
> struct drm_plane_state *old_plane_state,
> @@ -4876,12 +4897,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
> struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state);
> struct rect *dirty_rects = flip_addrs->dirty_rects;
> uint32_t num_clips;
> + struct drm_mode_rect *clips;
> bool bb_changed;
> bool fb_changed;
> uint32_t i = 0;
>
> - flip_addrs->dirty_rect_count = 0;
> -
> /*
> * Cursor plane has it's own dirty rect update interface. See
> * dcn10_dmub_update_cursor_data and dmub_cmd_update_cursor_info_data
> @@ -4894,15 +4914,11 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
> * requested, and there is a plane update, do FFU.
> */
> if (!dm_crtc_state->mpo_requested) {
> - dirty_rects[0].x = 0;
> - dirty_rects[0].y = 0;
> - dirty_rects[0].width = dm_crtc_state->base.mode.crtc_hdisplay;
> - dirty_rects[0].height = dm_crtc_state->base.mode.crtc_vdisplay;
> - flip_addrs->dirty_rect_count = 1;
> - DRM_DEBUG_DRIVER("[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n",
> - new_plane_state->plane->base.id,
> - dm_crtc_state->base.mode.crtc_hdisplay,
> - dm_crtc_state->base.mode.crtc_vdisplay);
> + fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[0], 0,
> + 0, dm_crtc_state->base.mode.crtc_hdisplay,
> + dm_crtc_state->base.mode.crtc_vdisplay, &i,
> + true);
> + flip_addrs->dirty_rect_count = i;
> return;
> }

Previously, we always do FFU on plane updates if no MPO has been
requested. Now, since we want to look at user-provided DRM damage clips,
this bit needs a bit of a rework.

In short, if there are valid clips for this plane
(drm_plane_get_damage_clips_count() > 0), they should be added to
dc_dirty_rects. Otherwise, fallback to old FFU logic.

With MPO, the damage clips are more interesting, since the entire
plane's bounding box can be moved. I wonder if that is reflected in
DRM's damage clips. Do you know if a plane bb change will be reflected
in drm_plane_get_damage_clips()?

Thanks,
Leo
>
> @@ -4914,6 +4930,7 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
> * rects.
> */
> num_clips = drm_plane_get_damage_clips_count(new_plane_state);
> + clips = drm_plane_get_damage_clips(new_plane_state);
> fb_changed = old_plane_state->fb->base.id !=
> new_plane_state->fb->base.id;
> bb_changed = (old_plane_state->crtc_x != new_plane_state->crtc_x ||
> @@ -4921,33 +4938,33 @@ static void fill_dc_dirty_rects(struct drm_plane *plane,
> old_plane_state->crtc_w != new_plane_state->crtc_w ||
> old_plane_state->crtc_h != new_plane_state->crtc_h);
>
> - DRM_DEBUG_DRIVER("[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n",
> - new_plane_state->plane->base.id,
> - bb_changed, fb_changed, num_clips);
> + drm_dbg(plane->dev,
> + "[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n",
> + new_plane_state->plane->base.id,
> + bb_changed, fb_changed, num_clips);
>
> - if (num_clips || fb_changed || bb_changed) {
> - dirty_rects[i].x = new_plane_state->crtc_x;
> - dirty_rects[i].y = new_plane_state->crtc_y;
> - dirty_rects[i].width = new_plane_state->crtc_w;
> - dirty_rects[i].height = new_plane_state->crtc_h;
> - DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n",
> - new_plane_state->plane->base.id,
> - dirty_rects[i].x, dirty_rects[i].y,
> - dirty_rects[i].width, dirty_rects[i].height);
> - i += 1;
> + if (num_clips) {
> + for (; i < num_clips; i++, clips++) {
> + fill_dc_dirty_rect(new_plane_state->plane,
> + &dirty_rects[i], clips->x1,
> + clips->y1, clips->x2 - clips->x1,
> + clips->y2 - clips->y1, &i, false);
> + }
> + } else if (fb_changed || bb_changed) {
> + fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
> + new_plane_state->crtc_x,
> + new_plane_state->crtc_y,
> + new_plane_state->crtc_w,
> + new_plane_state->crtc_h, &i, false);
> }
>
> /* Add old plane bounding-box if plane is moved or resized */
> if (bb_changed) {
> - dirty_rects[i].x = old_plane_state->crtc_x;
> - dirty_rects[i].y = old_plane_state->crtc_y;
> - dirty_rects[i].width = old_plane_state->crtc_w;
> - dirty_rects[i].height = old_plane_state->crtc_h;
> - DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)\n",
> - old_plane_state->plane->base.id,
> - dirty_rects[i].x, dirty_rects[i].y,
> - dirty_rects[i].width, dirty_rects[i].height);
> - i += 1;
> + fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
> + old_plane_state->crtc_x,
> + old_plane_state->crtc_y,
> + old_plane_state->crtc_w,
> + old_plane_state->crtc_h, &i, false);
> }
>
> flip_addrs->dirty_rect_count = i;
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
> index e6854f7270a6..3c50b3ff7954 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
> @@ -1600,6 +1600,10 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
> drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
> supported_rotations);
>
> + if (dm->adev->ip_versions[DCE_HWIP][0] > IP_VERSION(3, 0, 1) &&
> + plane->type != DRM_PLANE_TYPE_CURSOR)
> + drm_plane_enable_fb_damage_clips(plane);
> +
> drm_plane_helper_add(plane, &dm_plane_helper_funcs);
>
> #ifdef CONFIG_DRM_AMD_DC_HDR

2022-11-18 16:03:19

by Hamza Mahfooz

[permalink] [raw]
Subject: Re: [PATCH] drm/amd/display: add FB_DAMAGE_CLIPS support

Hey Leo,

On 11/17/22 12:31, Leo Li wrote:
>
>
> On 11/15/22 15:24, Hamza Mahfooz wrote:
>> Currently, userspace doesn't have a way to communicate selective updates
>> to displays. So, enable support for FB_DAMAGE_CLIPS for DCN ASICs newer
>> than DCN301, convert DRM damage clips to dc dirty rectangles and fill
>> them into dirty_rects in fill_dc_dirty_rects().
>>
>> Signed-off-by: Hamza Mahfooz <[email protected]>
>> ---
>>   .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 91 +++++++++++--------
>>   .../amd/display/amdgpu_dm/amdgpu_dm_plane.c   |  4 +
>>   2 files changed, 58 insertions(+), 37 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> index 185d09c760ba..18b710ba802d 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> @@ -4842,6 +4842,31 @@ static int fill_dc_plane_attributes(struct
>> amdgpu_device *adev,
>>       return 0;
>>   }
>> +static inline void fill_dc_dirty_rect(struct drm_plane *plane,
>> +                      struct rect *dirty_rect, int32_t x,
>> +                      int32_t y, int32_t width, int32_t height,
>> +                      int *i, bool ffu)
>> +{
>> +    WARN_ON(*i >= DC_MAX_DIRTY_RECTS);
>
> Hi Hamza,
>
> Since dc_flip_addrs->dirty_rects has a fixed length of
> DC_MAX_DIRTY_RECTS per pipe (a restriction by DMUB FW), I think it makes
> more sense to fallback to a full-frame-update (FFU) if num_clips >
> DC_MAX_DIRTY_RECTS. An alternative would be to reject the atomic commit,
> but that sounds heavy handed.
>
>
>> +
>> +    dirty_rect->x = x;
>> +    dirty_rect->y = y;
>> +    dirty_rect->width = width;
>> +    dirty_rect->height = height;
>> +
>> +    if (ffu)
>> +        drm_dbg(plane->dev,
>> +            "[PLANE:%d] PSR FFU dirty rect size (%d, %d)\n",
>> +            plane->base.id, width, height);
>> +    else
>> +        drm_dbg(plane->dev,
>> +            "[PLANE:%d] PSR SU dirty rect at (%d, %d) size (%d, %d)",
>> +            plane->base.id, x, y, width, height);
>> +
>> +    (*i)++;
>> +}
>> +
>> +
>>   /**
>>    * fill_dc_dirty_rects() - Fill DC dirty regions for PSR selective
>> updates
>>    *
>> @@ -4862,10 +4887,6 @@ static int fill_dc_plane_attributes(struct
>> amdgpu_device *adev,
>>    * addition, certain use cases - such as cursor and multi-plane
>> overlay (MPO) -
>>    * implicitly provide damage clips without any client support via
>> the plane
>>    * bounds.
>> - *
>> - * Today, amdgpu_dm only supports the MPO and cursor usecase.
>> - *
>> - * TODO: Also enable for FB_DAMAGE_CLIPS
>>    */
>>   static void fill_dc_dirty_rects(struct drm_plane *plane,
>>                   struct drm_plane_state *old_plane_state,
>> @@ -4876,12 +4897,11 @@ static void fill_dc_dirty_rects(struct
>> drm_plane *plane,
>>       struct dm_crtc_state *dm_crtc_state = to_dm_crtc_state(crtc_state);
>>       struct rect *dirty_rects = flip_addrs->dirty_rects;
>>       uint32_t num_clips;
>> +    struct drm_mode_rect *clips;
>>       bool bb_changed;
>>       bool fb_changed;
>>       uint32_t i = 0;
>> -    flip_addrs->dirty_rect_count = 0;
>> -
>>       /*
>>        * Cursor plane has it's own dirty rect update interface. See
>>        * dcn10_dmub_update_cursor_data and
>> dmub_cmd_update_cursor_info_data
>> @@ -4894,15 +4914,11 @@ static void fill_dc_dirty_rects(struct
>> drm_plane *plane,
>>        * requested, and there is a plane update, do FFU.
>>        */
>>       if (!dm_crtc_state->mpo_requested) {
>> -        dirty_rects[0].x = 0;
>> -        dirty_rects[0].y = 0;
>> -        dirty_rects[0].width = dm_crtc_state->base.mode.crtc_hdisplay;
>> -        dirty_rects[0].height = dm_crtc_state->base.mode.crtc_vdisplay;
>> -        flip_addrs->dirty_rect_count = 1;
>> -        DRM_DEBUG_DRIVER("[PLANE:%d] PSR FFU dirty rect size (%d,
>> %d)\n",
>> -                 new_plane_state->plane->base.id,
>> -                 dm_crtc_state->base.mode.crtc_hdisplay,
>> -                 dm_crtc_state->base.mode.crtc_vdisplay);
>> +        fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[0], 0,
>> +                   0, dm_crtc_state->base.mode.crtc_hdisplay,
>> +                   dm_crtc_state->base.mode.crtc_vdisplay, &i,
>> +                   true);
>> +        flip_addrs->dirty_rect_count = i;
>>           return;
>>       }
>
> Previously, we always do FFU on plane updates if no MPO has been
> requested. Now, since we want to look at user-provided DRM damage clips,
> this bit needs a bit of a rework.
>
> In short, if there are valid clips for this plane
> (drm_plane_get_damage_clips_count() > 0), they should be added to
> dc_dirty_rects. Otherwise, fallback to old FFU logic.
>
> With MPO, the damage clips are more interesting, since the entire
> plane's bounding box can be moved. I wonder if that is reflected in
> DRM's damage clips. Do you know if a plane bb change will be reflected
> in drm_plane_get_damage_clips()?

From what I've seen, plane bb changes are not counted as damage clips.

>
> Thanks,
> Leo
>> @@ -4914,6 +4930,7 @@ static void fill_dc_dirty_rects(struct drm_plane
>> *plane,
>>        * rects.
>>        */
>>       num_clips = drm_plane_get_damage_clips_count(new_plane_state);
>> +    clips = drm_plane_get_damage_clips(new_plane_state);
>>       fb_changed = old_plane_state->fb->base.id !=
>>                new_plane_state->fb->base.id;
>>       bb_changed = (old_plane_state->crtc_x != new_plane_state->crtc_x ||
>> @@ -4921,33 +4938,33 @@ static void fill_dc_dirty_rects(struct
>> drm_plane *plane,
>>                 old_plane_state->crtc_w != new_plane_state->crtc_w ||
>>                 old_plane_state->crtc_h != new_plane_state->crtc_h);
>> -    DRM_DEBUG_DRIVER("[PLANE:%d] PSR bb_changed:%d fb_changed:%d
>> num_clips:%d\n",
>> -             new_plane_state->plane->base.id,
>> -             bb_changed, fb_changed, num_clips);
>> +    drm_dbg(plane->dev,
>> +        "[PLANE:%d] PSR bb_changed:%d fb_changed:%d num_clips:%d\n",
>> +        new_plane_state->plane->base.id,
>> +        bb_changed, fb_changed, num_clips);
>> -    if (num_clips || fb_changed || bb_changed) {
>> -        dirty_rects[i].x = new_plane_state->crtc_x;
>> -        dirty_rects[i].y = new_plane_state->crtc_y;
>> -        dirty_rects[i].width = new_plane_state->crtc_w;
>> -        dirty_rects[i].height = new_plane_state->crtc_h;
>> -        DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d)
>> size (%d, %d)\n",
>> -                 new_plane_state->plane->base.id,
>> -                 dirty_rects[i].x, dirty_rects[i].y,
>> -                 dirty_rects[i].width, dirty_rects[i].height);
>> -        i += 1;
>> +    if (num_clips) {
>> +        for (; i < num_clips; i++, clips++) {
>> +            fill_dc_dirty_rect(new_plane_state->plane,
>> +                       &dirty_rects[i], clips->x1,
>> +                       clips->y1, clips->x2 - clips->x1,
>> +                       clips->y2 - clips->y1, &i, false);
>> +        }
>> +    } else if (fb_changed || bb_changed) {
>> +        fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
>> +                   new_plane_state->crtc_x,
>> +                   new_plane_state->crtc_y,
>> +                   new_plane_state->crtc_w,
>> +                   new_plane_state->crtc_h, &i, false);
>>       }
>>       /* Add old plane bounding-box if plane is moved or resized */
>>       if (bb_changed) {
>> -        dirty_rects[i].x = old_plane_state->crtc_x;
>> -        dirty_rects[i].y = old_plane_state->crtc_y;
>> -        dirty_rects[i].width = old_plane_state->crtc_w;
>> -        dirty_rects[i].height = old_plane_state->crtc_h;
>> -        DRM_DEBUG_DRIVER("[PLANE:%d] PSR SU dirty rect at (%d, %d)
>> size (%d, %d)\n",
>> -                old_plane_state->plane->base.id,
>> -                dirty_rects[i].x, dirty_rects[i].y,
>> -                dirty_rects[i].width, dirty_rects[i].height);
>> -        i += 1;
>> +        fill_dc_dirty_rect(new_plane_state->plane, &dirty_rects[i],
>> +                   old_plane_state->crtc_x,
>> +                   old_plane_state->crtc_y,
>> +                   old_plane_state->crtc_w,
>> +                   old_plane_state->crtc_h, &i, false);
>>       }
>>       flip_addrs->dirty_rect_count = i;
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>> index e6854f7270a6..3c50b3ff7954 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
>> @@ -1600,6 +1600,10 @@ int amdgpu_dm_plane_init(struct
>> amdgpu_display_manager *dm,
>>           drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
>>                              supported_rotations);
>> +    if (dm->adev->ip_versions[DCE_HWIP][0] > IP_VERSION(3, 0, 1) &&
>> +        plane->type != DRM_PLANE_TYPE_CURSOR)
>> +        drm_plane_enable_fb_damage_clips(plane);
>> +
>>       drm_plane_helper_add(plane, &dm_plane_helper_funcs);
>>   #ifdef CONFIG_DRM_AMD_DC_HDR

--
Hamza