On Monday 12 September 2011 02:42 PM, Valkeinen, Tomi wrote:
Enabling HDMI output often causes sync lost errors, and almost always
causes timeout errors being printed from dispc_mgr_enable_digit_out().
The sync lost problem seems to go lessen greatly if we first enable the
HDMI output, and only then enable the DISPC output. However, as this is
only based on observations, the fix may not be perfect as the problem
may lie somewhere else. Nevertheless, HDMI works better with this patch.
This will also fix the dispc's dispc_mgr_enable_digit_out(), as the code
waits for two VSYNCs after enabling the output. If the HDMI output is
disabled (as it was previously), there are no VSYNCs and
dispc_mgr_enable_digit_out() will print timeout errors.
Cc: Mythri P K<mythr...@ti.com>
Signed-off-by: Tomi Valkeinen<tomi.valkei...@ti.com>
---
drivers/video/omap2/dss/hdmi.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 4752137..06a78b2 100644
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -529,10 +529,10 @@ static int hdmi_power_on(struct omap_dss_device *dssdev)
dispc_set_digit_size(dssdev->panel.timings.x_res,
dssdev->panel.timings.y_res);
- dispc_mgr_enable(OMAP_DSS_CHANNEL_DIGIT, 1);
-
hdmi.ip_data.ops->video_enable(&hdmi.ip_data, 1);
+ dispc_mgr_enable(OMAP_DSS_CHANNEL_DIGIT, 1);
+
What content would HDMI push out till the time DIGIT is enabled? It
might be interesting to put some milliseconds of delay here and see what
happens.
Archit
return 0;
err:
hdmi_runtime_put();
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
