[Intel-gfx] [PATCH v2 1/2] drm/i915/psr: Use full update In case of area calculation fails

["Jouni Högander" <jouni.hogander@intel.com>]

Currently we have some corner cases where area calculation fails.  For
these sel fetch area calculation ends up having update area as y1 = 0,
y2 = 4. Instead of these values safer option is full update.

One of such for example is big fb with offset. We don't have usable
offset in psr2_sel_fetch_update. Currently it's open what is the
proper way to fix this corner case. Use full update for now.

v2: Commit message modified

Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Tested-by: Mark Pearson <markpearson@lenovo.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 06db407e2749..8c099d24de86 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1770,6 +1770,9 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 		clip_area_update(&pipe_clip, &damaged_area);
 	}
 
+	if (pipe_clip.y1 == -1)
+		full_update = true;
+
 	if (full_update)
 		goto skip_sel_fetch_set_loop;
 
-- 
2.25.1