linux-kernel - [PATCH v1 3/3] msm: skip the atomic commit of self refresh while PSR running

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Message-ID: <1680271114-1534-4-git-send-email-quic_vpolimer@quicinc.com>
Date:   Fri, 31 Mar 2023 19:28:34 +0530
From:   Vinod Polimera <quic_vpolimer@...cinc.com>
To:     <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>
CC:     Vinod Polimera <quic_vpolimer@...cinc.com>,
        <linux-kernel@...r.kernel.org>, <robdclark@...il.com>,
        <dianders@...omium.org>, <swboyd@...omium.org>,
        <quic_kalyant@...cinc.com>, <dmitry.baryshkov@...aro.org>,
        <quic_khsieh@...cinc.com>, <quic_vproddut@...cinc.com>,
        <quic_bjorande@...cinc.com>, <quic_abhinavk@...cinc.com>,
        <quic_sbillaka@...cinc.com>
Subject: [PATCH v1 3/3] msm: skip the atomic commit of self refresh while PSR running

In certain CPU stress conditions, there can be a delay in scheduling commit
work and it was observed that PSR commit from a different work queue was 
scheduled. Avoid these commits as display is already in PSR mode.

Signed-off-by: Vinod Polimera <quic_vpolimer@...cinc.com>
---
 drivers/gpu/drm/msm/msm_atomic.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 645fe53..f8141bb 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -192,6 +192,9 @@ int msm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state)
 			new_crtc_state->mode_changed = true;
 			state->allow_modeset = true;
 		}
+
+		if (old_crtc_state->self_refresh_active && new_crtc_state->self_refresh_active)
+			return -EINVAL;
 	}
 
 	return drm_atomic_helper_check(dev, state);
-- 
2.7.4