[DPU PATCH v3 1/2] drm/msm/dsi: check video mode engine status before waiting

[Abhinav Kumar <abhinavk-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>]

Make sure the video mode engine is on before waiting
for the video done interrupt.

Changes in v2:
- Replace pr_err with dev_err
- Changed error message

Changes in v3:
- Move the return value check to another
  patch

Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
---
 drivers/gpu/drm/msm/dsi/dsi_host.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 7a03a94..8df0d44 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -173,6 +173,7 @@ struct msm_dsi_host {
 
 	bool registered;
 	bool power_on;
+	bool enabled;
 	int irq;
 };
 
@@ -1001,7 +1002,7 @@ static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
 	if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
 		return;
 
-	if (msm_host->power_on) {
+	if (msm_host->power_on && msm_host->enabled) {
 		dsi_wait4video_done(msm_host);
 		/* delay 4 ms to skip BLLP */
 		usleep_range(2000, 4000);
@@ -2203,7 +2204,7 @@ int msm_dsi_host_enable(struct mipi_dsi_host *host)
 	 *	pm_runtime_put_autosuspend(&msm_host->pdev->dev);
 	 * }
 	 */
-
+	msm_host->enabled = true;
 	return 0;
 }
 
@@ -2219,7 +2220,7 @@ int msm_dsi_host_disable(struct mipi_dsi_host *host)
 	 * Reset to disable video engine so that we can send off cmd.
 	 */
 	dsi_sw_reset(msm_host);
-
+	msm_host->enabled = false;
 	return 0;
 }
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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