During suspend/resume process all connectors are explicitly disabled and then reenabled. However resume fails because of the connector_status check:
[ 1185.831970] [dpu error]connector not connected 3
It doesn't make sense to check for the Writeback connected status (and other drivers don't perform such check), so drop the check.
Fixes: 71174f362d67 ("drm/msm/dpu: move writeback's atomic_check to dpu_writeback.c") Cc: stable@vger.kernel.org Reported-by: Leonard Lausen leonard@lausen.nl Closes: https://gitlab.freedesktop.org/drm/msm/-/issues/57 Tested-by: Leonard Lausen leonard@lausen.nl # on sc7180 lazor Tested-by: György Kurucz me@kuruczgy.com Reviewed-by: Johan Hovold johan+linaro@kernel.org Tested-by: Johan Hovold johan+linaro@kernel.org Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org --- Leonard Lausen reported an issue with suspend/resume of the sc7180 devices. Fix the WB atomic check, which caused the issue. --- Changes in v3: - Rebased on top of msm-fixes - Link to v2: https://lore.kernel.org/r/20240802-dpu-fix-wb-v2-0-7eac9eb8e895@linaro.org
Changes in v2: - Reworked the writeback to just drop the connector->status check. - Expanded commit message for the debugging patch. - Link to v1: https://lore.kernel.org/r/20240709-dpu-fix-wb-v1-0-448348bfd4cb@linaro.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c | 3 --- 1 file changed, 3 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c index 16f144cbc0c986ee266412223d9e605b01f9fb8c..8ff496082902b1ee713e806140f39b4730ed256a 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c @@ -42,9 +42,6 @@ static int dpu_wb_conn_atomic_check(struct drm_connector *connector, if (!conn_state || !conn_state->connector) { DPU_ERROR("invalid connector state\n"); return -EINVAL; - } else if (conn_state->connector->status != connector_status_connected) { - DPU_ERROR("connector not connected %d\n", conn_state->connector->status); - return -EINVAL; }
crtc = conn_state->crtc;
--- base-commit: 86313a9cd152330c634b25d826a281c6a002eb77 change-id: 20240709-dpu-fix-wb-6cd57e3eb182
Best regards,