diff mbox series

[v3,05/15] drm/msm/dpu: fix mixer number counter on allocation

Message ID 20241219-sm8650-v6-13-hmd-deckard-mdss-quad-upstream-32-v3-5-92c7c0a228e3@linaro.org
State New
Headers show
Series (no cover subject) | expand

Commit Message

Jun Nie Dec. 19, 2024, 7:49 a.m. UTC 
Add the case to reserve multiple pairs mixers for high resolution.
Current code only supports one pair of mixer usage case. To support
quad-pipe usage case, two pairs of mixers are needed.

Current code resets number of mixer on failure of pair's peer test and
retry on another pair. If two pairs are needed, the failure on the test
of 2nd pair results clearing to the 1st pair. This patch only clear the
bit for the 2nd pair allocation before retry on another pair.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
index cde3c5616f9bc..a8b01b78c02c7 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
@@ -316,7 +316,11 @@  static int _dpu_rm_reserve_lms(struct dpu_rm *rm,
 		if (!rm->mixer_blks[i])
 			continue;
 
-		lm_count = 0;
+		/*
+		 * Clear the last bit to drop the previous primary mixer if
+		 * fail to find its peer.
+		 */
+		lm_count &= 0xfe;
 		lm_idx[lm_count] = i;
 
 		if (!_dpu_rm_check_lm_and_get_connected_blks(rm, global_state,