Re: [PATCH v2] drm/msm/dpu: Reapply CTM if modeset is needed

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On 1/18/2023 8:41 AM, Jessica Zhang wrote:
Add a !drm_atomic_crtc_needs_modeset() check to
_dpu_crtc_setup_cp_blocks() so that CTM is reapplied if the LM/DSPP
blocks were reallocated during modeset.

This was in addition to the suspend/resume case.

So CTM needs to be reapplied in case of suspend/resume OR LM/DSPP block reallocation.

To cover both of these we are adding the needs_modeset check


Changes in V2:
- Fixed commit message

Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/23
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 13ce321283ff..aa120a230222 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -748,7 +748,7 @@ static void _dpu_crtc_setup_cp_blocks(struct drm_crtc *crtc)
  	int i;
- if (!state->color_mgmt_changed)
+	if (!state->color_mgmt_changed && !drm_atomic_crtc_needs_modeset(state))
  		return;
for (i = 0; i < cstate->num_mixers; i++) {



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