p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

drm/bridge: ti-sn65dsi86: Poll for training complete 

Instead of just waiting 20ms for training to complete, actually poll the
status to ensure training is finished.

Changes in v3:
- Added to the set

Cc: Sandeep Panda <spanda@codeaurora.org>
Reviewed-by: Sandeep Panda <spanda@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180813213058.184821-7-sean@poorly.run
This commit is contained in:
Sean Paul 2018-08-13 17:30:45 -04:00
parent fc52d0ed11
commit 638e9af16b
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/bridge/ti-sn65dsi86.c
View File

@ -493,7 +493,17 @@ static void ti_sn_bridge_enable(struct drm_bridge *bridge)
/* Semi auto link training mode */
regmap_write(pdata->regmap, SN_ML_TX_MODE_REG, 0x0A);
msleep(20); /* 20ms delay recommended by spec */
ret = regmap_read_poll_timeout(pdata->regmap, SN_ML_TX_MODE_REG, val,
val == ML_TX_MAIN_LINK_OFF ||
val == ML_TX_NORMAL_MODE, 1000,
500 * 1000);
if (ret) {
DRM_ERROR("Training complete polling failed (%d)\n", ret);
return;
} else if (val == ML_TX_MAIN_LINK_OFF) {
DRM_ERROR("Link training failed, link is off\n");
return;
}
/* config video parameters */
ti_sn_bridge_set_video_timings(pdata);