Commit 638e9af1 authored by Sean Paul's avatar Sean Paul
Browse files

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: default avatarSandeep Panda <spanda@codeaurora.org>
Signed-off-by: default avatarSean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180813213058.184821-7-sean@poorly.run
parent fc52d0ed

drivers/gpu/drm/bridge/ti-sn65dsi86.c

+11 −1
Original line number Diff line number Diff line
@@ -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);