On Wed, 2020-12-16 at 14:10 +0000, Mun, Gwan-gyeong wrote:
> On Wed, 2020-12-16 at 05:17 -0800, Souza, Jose wrote:
> > On Wed, 2020-12-16 at 10:29 +0000, Mun, Gwan-gyeong wrote:
> > > On Tue, 2020-12-15 at 05:14 -0800, Souza, Jose wrote:
> > > > On Tue, 2020-12-15 at 13:02 +0000, Mun, Gwan-gyeong wrote:
> > > > > On Mon, 2020-12-14 at 09:49 -0800, José Roberto de Souza wrote:
> > > > > > Now using plane damage clips property to calcualte the
> > > > > > damaged
> > > > > > area.
> > > > > > Selective fetch only supports one region to be fetched so
> > > > > > software
> > > > > > needs to calculate a bounding box around all damage clips.
> > > > > >
> > > > > > Now that we are not complete fetching each plane, there is
> > > > > > another
> > > > > > loop needed as all the plane areas that intersect with the
> > > > > > pipe
> > > > > > damaged area needs to be fetched from memory so the complete
> > > > > > blending
> > > > > > of all planes can happen.
> > > > > >
> > > > > Hi,
> > > > > > v2:
> > > > > > - do not shifthing new_plane_state->uapi.dst only src is in
> > > > > > 16.16
> > > > > Typo on commit message. shifthing -> shifting
> > > > > > format
> > > > > >
> > > > > > v4:
> > > > > > - setting plane selective fetch area using the whole pipe
> > > > > > damage
> > > > > > area
> > > > > > - mark the whole plane area damaged if plane visibility or
> > > > > > alpha
> > > > > > changed
> > > > > >
> > > > > > v5:
> > > > > > - taking in consideration src.y1 in the damage coordinates
> > > > > > - adding to the pipe damaged area planes that were visible
> > > > > > but
> > > > > > are
> > > > > > invisible in the new state
> > > > > >
> > > > > > v6:
> > > > > > - consider old state plane coordinates when visibility
> > > > > > changes or
> > > > > > it
> > > > > > moved to calculate damaged area
> > > > > > - remove from damaged area the portion not in src clip
> > > > > >
> > > > > > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > > > > > Cc: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
> > > > > > Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> > > > > > ---
> > > > > > drivers/gpu/drm/i915/display/intel_psr.c | 98
> > > > > > +++++++++++++++++++++-
> > > > > > --
> > > > > > 1 file changed, 86 insertions(+), 12 deletions(-)
> > > > > >
> > > > > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > b/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > index d9a395c486d3..7daed098fa74 100644
> > > > > > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > @@ -1269,8 +1269,8 @@ int intel_psr2_sel_fetch_update(struct
> > > > > > intel_atomic_state *state,
> > > > > > struct intel_crtc *crtc)
> > > > > > {
> > > > > > struct intel_crtc_state *crtc_state =
> > > > > > intel_atomic_get_new_crtc_state(state, crtc);
> > > > > > + struct drm_rect pipe_clip = { .x1 = 0, .y1 = -1, .x2 =
> > > > > > INT_MAX,
> > > > > > .y2 = -1 };
> > > > > > struct intel_plane_state *new_plane_state,
> > > > > > *old_plane_state;
> > > > > > - struct drm_rect pipe_clip = { .y1 = -1 };
> > > > > > struct intel_plane *plane;
> > > > > > bool full_update = false;
> > > > > > int i, ret;
> > > > > > @@ -1282,9 +1282,17 @@ int intel_psr2_sel_fetch_update(struct
> > > > > > intel_atomic_state *state,
> > > > > > if (ret)
> > > > > > return ret;
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > + /*
> > > > > > + * Calculate minimal selective fetch area of each plane
> > > > > > and
> > > > > > calculate
> > > > > > + * the pipe damaged area.
> > > > > > + * In the next loop the plane selective fetch area will
> > > > > > actually be set
> > > > > > + * using whole pipe damaged area.
> > > > > > + */
> > > > > > for_each_oldnew_intel_plane_in_state(state, plane,
> > > > > > old_plane_state,
> > > > > > new_plane_state,
> > > > > > i) {
> > > > > > - struct drm_rect *sel_fetch_area, temp;
> > > > > > + struct drm_rect src, damaged_area = { .x1 = 0,
> > > > > > .y1 =
> > > > > > -1, .x2 = INT_MAX, .y2 = -1 };
> > > > > > + struct drm_mode_rect *damaged_clips;
> > > > > > + u32 num_clips, j;
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > if (new_plane_state->uapi.crtc != crtc_state-
> > > > > > > uapi.crtc)
> > > > > > continue;
> > > > > > @@ -1300,23 +1308,89 @@ int
> > > > > > intel_psr2_sel_fetch_update(struct
> > > > > > intel_atomic_state *state,
> > > > > > break;
> > > > > > }
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > - if (!new_plane_state->uapi.visible)
> > > > > > - continue;
> > > > > > + drm_rect_convert_16_16_to_regular(&new_plane_st
> > > > > > ate-
> > > > > > > uapi.src, &src);
> > > > > > + damaged_clips =
> > > > > > drm_plane_get_damage_clips(&new_plane_state->uapi);
> > > > > > + num_clips =
> > > > > > drm_plane_get_damage_clips_count(&new_plane_state->uapi);
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > /*
> > > > > > - * For now doing a selective fetch in the whole
> > > > > > plane
> > > > > > area,
> > > > > > - * optimizations will come in the future.
> > > > > > + * If visibility or plane moved, mark the whole
> > > > > > plane
> > > > > > area as
> > > > > > + * damaged as it needs to be complete redraw in
> > > > > > the new
> > > > > > and old
> > > > > > + * position.
> > > > > > */
> > > > > > + if (new_plane_state->uapi.visible !=
> > > > > > old_plane_state-
> > > > > > > uapi.visible ||
> > > > > > + !drm_rect_equals(&new_plane_state-
> > > > > > > uapi.dst,
> > > > > > + &old_plane_state-
> > > > > > > uapi.dst)) {
> > > > > > + damaged_area.y1 = old_plane_state-
> > > > > > > uapi.src.y1
> > > > > > > > 16;
> > > > > > + damaged_area.y1 = old_plane_state-
> > > > > > > uapi.src.y2
> > > > > > > > 16;
> > > > > > + damaged_area.y1 += old_plane_state-
> > > > > > > uapi.dst.y1;
> > > > > > + damaged_area.y2 += old_plane_state-
> > > > > > > uapi.dst.y1;
> > > > > > + clip_area_update(&pipe_clip,
> > > > > > &damaged_area);
> > > > > > +
> > > > > > + num_clips = 0;
> > > > > > + damaged_area.y1 = src.y1;
> > > > > > + damaged_area.y2 = src.y2;
> > > > > 1. Visibility change case
> > > > > The pipe damaged area (The Selective Update region) needs to
> > > > > accumulate being visible plane's dst between old and new
> > > > > plane's
> > > > > dst.
> > > > >
> > > > > if you are implementing this scenario, the code shoule be like
> > > > > this,
> > > > >
> > > > > if (new_plane_state->uapi.visible != old_plane_state-
> > > > > > uapi.visible)
> > > > > {
> > > > > if (new_plane_state->uapi.visible) {
> > > > > damaged_area.y1 = new_plane_state->uapi.dst.y1;
> > > > > damaged_area.y2 = new_plane_state->uapi.dst.y2;
> > > > > } else {
> > > > > damaged_area.y1 = old_plane_state->uapi.dst.y1;
> > > > > damaged_area.y2 = old_plane_state->uapi.dst.y2;
> > > > > }
> > > > > clip_area_update(&pipe_clip, &damaged_area);
> > > > > continue;
> > > > > }
> > > >
> > > > The current code does exactly above but discards the clipped in
> > > > uapi.src.
> > > >
> > > in order to accumlate the pipe damage area, we don't need to use
> > > and
> > > calculate src coordinates on move and visibility change scenarios.
> > > we can easily accumalates than additional calculation.
> >
> > Using uapi.dst will cause additional and unnecessary area be included
> > to the pipe damaged area, imagine that a plane have src.x1 = 50,
> > src.y1 = 100,
> > ... the plane invisible/cropped area don't need to be added to the
> > pipe damaged area.
> >
> easist way to get damaged area for crtc is just using uapi.dst
> but because fb damage clip follows uapi.src coordinates, we have to
> translate fb damage clip's coordinates to dst coordinates for
> accumulating crtc damage region.
>
> therefore can you explain what is the exact burden of using uapi.dst
> for calculating crtc damage area?
>
I hope this ASCI drawing do not break :P
|----------------------|
| |
| Pipe area |
|----------------| |
| whole plane A | |
| |----------| |
| | src | |
| | visible | |
------------------------
Using dst would add the whole plane A area to the pipe damaged area while using src will only add the visible area.
>
> >
> > > > > 2. Move case
> > > > > The pipe damaged area (The Selective Update region) needs to
> > > > > accumulate both old and new plane's dst
> > > >
> > > > same
> > > >
> > > > > if you are implementing this scenario, the code shoule be like
> > > > > this,
> > > > >
> > > > > else if (!drm_rect_equals(&new_plane_state->uapi.dst,
> > > > > &old_plane_state-
> > > > > > uapi.dst)) {
> > > > > damaged_area.y1 = new_plane_state->uapi.dst.y1;
> > > > > damaged_area.y2 = new_plane_state->uapi.dst.y2;
> > > > > clip_area_update(&pipe_clip, &damaged_area);
> > > > >
> > > > > damaged_area.y1 = old_plane_state->uapi.dst.y1;
> > > > > damaged_area.y2 = old_plane_state->uapi.dst.y2;
> > > > > clip_area_update(&pipe_clip, &damaged_area);
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
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> > > > >
> > > > >
> > > > > continue;
> > > > > }
> > > > > > + } else if (new_plane_state->uapi.alpha !=
> > > > > > old_plane_state->uapi.alpha) {
> > > > > > + num_clips = 0;
> > > > > > + damaged_area.y1 = src.y1;
> > > > > > + damaged_area.y2 = src.y2;
> > > > > 3. alpha has changed ( because alpha handling section is not
> > > > > optimized,
> > > > > it can be treated with the move section)
> > > Yes, you are right, there was a misunderstanding of the alpha
> > > scenario
> > > of me.
> > > > no need to handle like this for alpha, if the plane moved if will
> > > > be
> > > > handled in the "if" above with or without alpha change, if it did
> > > > not
> > > > moved but
> > > > alpha change no need to add the old state coordinate to the pipe
> > > > clip.
> > > >
> > > > > else if (new_plane_state->uapi.alpha != old_plane_state-
> > > > > > uapi.alpha) {
> > > > > damaged_area.y1 = new_plane_state->uapi.dst.y1;
> > > > > damaged_area.y2 = new_plane_state->uapi.dst.y2;
> > > > > clip_area_update(&pipe_clip, &damaged_area);
> > > > >
> > > > > damaged_area.y1 = old_plane_state->uapi.dst.y1;
> > > > > damaged_area.y2 = old_plane_state->uapi.dst.y2;
> > > > > clip_area_update(&pipe_clip, &damaged_area);
> > > > >
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> > > > > continue;
> > > > > }
> > > > > > + } else if (!num_clips &&
> > > > > > + new_plane_state->uapi.fb !=
> > > > > > old_plane_state-
> > > > > > > uapi.fb) {
> > > > > > + /*
> > > > > > + * If the plane don't have damage areas
> > > > > > but the
> > > > > > + * framebuffer changed, mark the whole
> > > > > > plane
> > > > > > area as
> > > > > > + * damaged.
> > > > > > + */
> > > > > > + damaged_area.y1 = src.y1;
> > > > > > + damaged_area.y2 = src.y2;
> > > > > > + }
> > > > > > +
> > > > > else if (!num_clips && new_plane_state->uapi.fb !=
> > > > > old_plane_state-
> > > > > > uapi.fb) {
> > > > > /*
> > > > > * If the plane don't have damage areas but the
> > > > > * framebuffer changed, mark the whole plane area as
> > > > > * damaged.
> > > > > */
> > > > > damaged_area.y1 = new_plane_state->uapi.dst.y1;
> > > > > damaged_area.y2 = new_plane_state->uapi.dst.y2;
> > > > > clip_area_update(&pipe_clip, &damaged_area);
> > > > > continue;
> > > > > }
> > > > > > + for (j = 0; j < num_clips; j++) {
> > > > > > + struct drm_rect clip;
> > > > > > +
> > > > > > + clip.y1 = damaged_clips[j].y1;
> > > > > > + clip.y2 = damaged_clips[j].y2;
> > > > > > + clip_area_update(&damaged_area, &clip);
> > > > > > + }
> > > > > > +
> > > > > > + if (!drm_rect_intersect(&damaged_area, &src))
> > > > > > + continue;
> > > > > > +
> > > > > > + damaged_area.y1 += new_plane_state-
> > > > > > > uapi.dst.y1;
> > > > > > + damaged_area.y2 += new_plane_state-
> > > > > > > uapi.dst.y1;
> > > > > > + clip_area_update(&pipe_clip, &damaged_area);
> > > > > > + }
> > > > > > +
> > > > > else if (num_clips) {
> > > > > struct drm_rect plane_damaged_area;
> > > > > plane_damaged_area.x1 = src.x1;
> > > > > plane_damaged_area.x2 = src.x2;
> > > > > plane_damaged_area.y1 = 0;
> > > > > plane_damaged_area.y2 = 0;
> > > > >
> > > > > for (j = 0; j < num_clips; j++) {
> > > > > struct drm_rect clip;
> > > > >
> > > > > clip.x1 = damaged_clips[j].x1;
> > > > > clip.x2 = damaged_clips[j].x2;
> > > > > clip.y1 = damaged_clips[j].y1;
> > > > > clip.y2 = damaged_clips[j].y2;
> > > > >
> > > > > if (drm_rect_intersect(&clip, &src)) {
> > > > > clip_area_update(&plane_damaged_area, &clip);
> > > > > }
> > > >
> > > > Call intersect at every clip? that don't look optimized.
> > > >
> > > when the clip_area_update() is called it just accumulates the input
> > > rects to one output rect.
> > > it might lead to accumulating unneeded excessive update rect region
> >
> > The excessive rect region will be removed once after sum all clips in
> > the current approach.
> >
> on the link's 2nd page,
> we only need a red Selective Fetch area, but your patch seems Selective
> Fetch area as green rect.
> https://docs.google.com/presentation/d/1gOKE4JnC97RzRg15ZM8IaQzHnifIxwvwP_UbOoGFE9E/edit?usp=sharing
Okay, now I got it.
Will update this but please take a look to the other answers so we do only one more version.
> > > > > }
> > > > >
> > > > > if (drm_rect_visible(plane_damaged_area)) {
> > > > > plane_damaged_area.y1 = plane_damaged_area.y1 - src.y1 +
> > > > > new_plane_state->uapi.dst.y1;
> > > > > plane_damaged_area.y2 = plane_damaged_area.y2 - src.y1 +
> > > > > new_plane_state->uapi.dst.y1;
> > > > >
> > > > > clip_area_update(&pipe_clip, &plane_damaged_area);
> > > > > continue;
> > > > > }
> > > > > }
> > > >
> > > > Current code sum all the damage clips, if the sum of the damage
> > > > clips
> > > > insect with the src area it is translated to pipe coordinates and
> > > > called
> > > > clip_area_update() to update pipe_clip.
> > > >
> > > > > the calculation and translating cooridinates is alreay
> > > > > implemented
> > > > > here
> > > > > (
> > > > > https://patchwork.freedesktop.org/patch/404264/?series=84340&rev=1
> > > > > it has commetns which explains scenarios.)
> > > > > > + if (full_update)
> > > > > > + goto skip_sel_fetch_set_loop;
> > > > > > +
> > > > > > + /*
> > > > > > + * Now that we have the pipe damaged area check if it
> > > > > > intersect
> > > > > > with
> > > > > > + * every plane, if it does set the plane selective
> > > > > > fetch area.
> > > > > > + */
> > > > > > + for_each_oldnew_intel_plane_in_state(state, plane,
> > > > > > old_plane_state,
> > > > > > + new_plane_state,
> > > > > > i) {
> > > > > > + struct drm_rect *sel_fetch_area, inter, src;
> > > > > > +
> > > > > > + if (new_plane_state->uapi.crtc != crtc_state-
> > > > > > > uapi.crtc
> > > > > > + !new_plane_state->uapi.visible)
> > > > > > + continue;
> > > > > > +
> > > > > > + inter = pipe_clip;
> > > > > > + if (!drm_rect_intersect(&inter,
> > > > > > &new_plane_state-
> > > > > > > uapi.dst))
> > > > > > + continue;
> > > > > > +
> > > > > > + drm_rect_convert_16_16_to_regular(&new_plane_st
> > > > > > ate-
> > > > > > > uapi.src, &src);
> > > > > > +
> > > > > > sel_fetch_area = &new_plane_state-
> > > > > > > psr2_sel_fetch_area;
> > > > > > - sel_fetch_area->y1 = new_plane_state-
> > > > > > > uapi.src.y1 >>
> > > > > > 16;
> > > > > > - sel_fetch_area->y2 = new_plane_state-
> > > > > > > uapi.src.y2 >>
> > > > > > 16;
> > > > > > + sel_fetch_area->y1 = inter.y1 -
> > > > > > new_plane_state-
> > > > > > > uapi.dst.y1;
> > > > > > + sel_fetch_area->y2 = inter.y2 -
> > > > > > new_plane_state-
> > > > > > > uapi.dst.y1;
> > > > > sel_fetch_area->y1 = inter.y1 - new_plane_state->uapi.dst.y1 +
> > > > > src.y1;
> > > > > sel_fetch_area->y2 = inter.y2 - new_plane_state->uapi.dst.y1 +
> > > > > src.y1;
> > > >
> > > > sel_fetch_area->y1 = inter.y1 - new_plane_state->uapi.dst.y1; +
> > > > drm_rect_intersect(sel_fetch_area, &src);
> > > > does a the same job and is easier to understand(translation +
> > > > clip)
> > > >
> > > when the src's x1 and y1 indicates over than 0, does it work?
> >
> > It will, we use it for scenarios like that in this function.
> >
> >
> here is the problematic case,
> if we assume src indicates 50 x 50 +10 +10
> ,fb damage rect indicates 5 x 5 +55 +55
> and dst indicates 50 x 50 +100 +100
>
> 1) if whole plane src area needs to be updated
> inter: 50 x 50 +100 +100
> sel_fetch_area->y1 = 100 - 100 => 0
> sel_fetch_area->y2 = 100 - 100 => 0
>
>
> drm_rect_intersect(sel_fetch_area, &src);
> => sel_fetch_area does not fit whole src area.
Your values are wrong.
# 50 x 50 +10 +10
src.x1 = 50
src.y1 = 50
src.x2 = 60
src.y2 = 60
# 5 x 5 +55 +55. * not used in example 1
damaged.x1 = 5
damaged.y1 = 5
damaged.x2 = 60
damaged.y2 = 60
# 50 x 50 +100 +100
dst.x1 = 50
dst.y1 = 50
dst.x2 = 150
dst.y2 = 150
####
1) if whole plane src are needs to be updated
pipe_clip.x1 = src.x1 + dst.x1 = 100
pipe_clip.y2 = src.y1 + dst.y1 = 100
pipe_clip.x2 = src.x2 + dst.y1 = 110
pipe_clip.y2 = src.y2 + dst.y2 = 110
# drm_rect_intersect(&inter, &new_plane_state->uapi.dst)
iter.x1 = 100
iter.y1 = 100
iter.x2 = 110
iter.y2 = 110
# sel_fetch_area->y1 = inter.y1 - new_plane_state->uapi.dst.y1;
sel_fetch_area.y1 = 100 - 50 = 50
sel_fetch_area.y2 = 110 - 50 = 60
drm_rect_intersect(sel_fetch_area, &src);
sel_fetch_area.y1 = 50
sel_fetch_area.y2 = 60
>
> 2) if only the plane fb damage needs to be updated
> translate fb damage's coordinates to crtc coordinates
> 5 x 5 +55 +55 => 5 x 5 +105 +105
> inter: 5 x 5 +105 +105
> sel_fetch_area->y1 = 105 - 100 => 5
> sel_fetch_area->y2 = 105 - 100 => 5
>
> drm_rect_intersect(sel_fetch_area, &src);
> => sel_fetch_area does not fit to src's damage area.
Let me know if this case is broken after use the right values.
>
> > > > > > + sel_fetch_area->x1 = src.x1;
> > > > > > + sel_fetch_area->x2 = src.x2;
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> > > > > > - temp = *sel_fetch_area;
> > > > > > - temp.y1 += new_plane_state->uapi.dst.y1;
> > > > > > - temp.y2 += new_plane_state->uapi.dst.y2;
> > > > > > - clip_area_update(&pipe_clip, &temp);
> > > > > > + drm_rect_intersect(sel_fetch_area, &src);
> > > > > why this line is needed?
> > > >
> > > > explained above.
> > > >
> > > >
> > > > > > }
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> > > > > > +skip_sel_fetch_set_loop:
> > > > > > psr2_man_trk_ctl_calc(crtc_state, &pipe_clip,
> > > > > > full_update);
> > > > > > return 0;
> > > > > > }
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