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drm/i915/fbc: disable FBC if PSR2 selective fetch is enabled

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It is not recommended to have both FBC dirty rect and PSR2
selective fetch be enabled at the same time. Mark FBC as not
possible, if PSR2 selective fetch is enabled.

v2: fix the condition to disable FBC if PSR2 enabled (Jani)

v3: use HAS_FBC_DIRTY_RECT()

v4: Update to patch description

Bspec: 68881
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250228093802.27091-9-vinod.govindapillai@intel.com
This commit is contained in:
Vinod Govindapillai
2025-02-28 11:38:01 +02:00
committed by Mika Kahola
parent 194ecad0b5
commit e2364a56ad
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/i915/display/intel_fbc.c
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@@ -1415,9 +1415,14 @@ static int intel_fbc_check_plane(struct intel_atomic_state *state,
* Display 12+ is not supporting FBC with PSR2.
* Recommendation is to keep this combination disabled
* Bspec: 50422 HSD: 14010260002
*
* In Xe3, PSR2 selective fetch and FBC dirty rect feature cannot
* coexist. So if PSR2 selective fetch is supported then mark that
* FBC is not supported.
* TODO: Need a logic to decide between PSR2 and FBC Dirty rect
*/
if (IS_DISPLAY_VER(display, 12, 14) && crtc_state->has_sel_update &&
!crtc_state->has_panel_replay) {
if ((IS_DISPLAY_VER(display, 12, 14) || HAS_FBC_DIRTY_RECT(display)) &&
crtc_state->has_sel_update && !crtc_state->has_panel_replay) {
plane_state->no_fbc_reason = "PSR2 enabled";
return 0;
}