diff options
| author | Fancy Fang <chen.fang@nxp.com> | 2018-08-24 10:29:53 +0800 |
|---|---|---|
| committer | Fancy Fang <chen.fang@nxp.com> | 2018-08-27 17:17:49 +0800 |
| commit | 56c91a7ee40f866ae770b2f20b3ea623c6c2f0cc (patch) | |
| tree | cbed9b0710dd9eb3459175accfba5af1745975d5 /drivers/gpu | |
| parent | 3b23233dafd65d6ea8c1fa12e8992c58ebc412bc (diff) | |
MLK-19252-7 drm/bridge: sec-dsim: workaround for 720p@60Hz on 4 lanes
For the CEA standard mode '1280x720@60Hz', the standard HFP value
is not suitable for the DSI peripheral which works with Non-burst
with Sync Pulse mode with 4 data lanes enabled. And this commit is
a workaround to plus 2 to the original HFP value to make this case
can display correctly.
Signed-off-by: Fancy Fang <chen.fang@nxp.com>
(cherry picked from commit 8b39ff24f89c5a9d21459ab5af47259060185b0a)
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/bridge/sec-dsim.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/sec-dsim.c b/drivers/gpu/drm/bridge/sec-dsim.c index 7a4072f8789b..c617fc939b1d 100644 --- a/drivers/gpu/drm/bridge/sec-dsim.c +++ b/drivers/gpu/drm/bridge/sec-dsim.c @@ -1344,6 +1344,23 @@ static void sec_mipi_dsim_bridge_mode_set(struct drm_bridge *bridge, * so it is called not every time atomic commit. */ + /* workaround for CEA standard mode "1280x720@60" + * display on 4 data lanes with Non-burst with sync + * pulse DSI mode, since use the standard horizontal + * timings cannot display correctly. And this code + * cannot be put into the dsim Bridge's mode_fixup, + * since the DSI device lane number change always + * happens after that. + */ + if (!strcmp(mode->name, "1280x720") && + mode->vrefresh == 60 && + dsim->lanes == 4 && + dsim->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) { + adjusted_mode->hsync_start += 2; + adjusted_mode->hsync_end += 2; + adjusted_mode->htotal += 2; + } + drm_display_mode_to_videomode(adjusted_mode, &dsim->vmode); } |