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drm/bridge: analogix_dp: Don't use fast link training when panel just powered up

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Panel would reset its setting when it powers down. It would forget the last
succeeded link training setting. So we can't use the last successful link
training setting to do fast link training. Let's reset fast_train_enable in
analogix_dp_bridge_disable();

Cc: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: zain wang <wzz@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180423105003.9004-4-enric.balletbo@collabora.com
This commit is contained in:
zain wang 2018-04-23 12:49:39 +02:00 committed by Andrzej Hajda
parent c2021db190
commit 7ba8fb5704
2 changed files with 6 additions and 5 deletions
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9
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
View file

@ -579,14 +579,14 @@ static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp)
if (retval != 1) {
dev_err(dp->dev, "failed to read downspread %d\n",
retval);
dp->fast_train_support = false;
dp->fast_train_enable = false;
} else {
dp->fast_train_support =
dp->fast_train_enable =
(spread & DP_NO_AUX_HANDSHAKE_LINK_TRAINING) ?
true : false;
}
dev_dbg(dp->dev, "fast link training %s\n",
dp->fast_train_support ? "supported" : "unsupported");
dp->fast_train_enable ? "supported" : "unsupported");
/* set enhanced mode if available */
analogix_dp_set_enhanced_mode(dp);
@ -793,7 +793,7 @@ static int analogix_dp_fast_link_train(struct analogix_dp_device *dp)
static int analogix_dp_train_link(struct analogix_dp_device *dp)
{
if (dp->fast_train_support)
if (dp->fast_train_enable)
return analogix_dp_fast_link_train(dp);
return analogix_dp_full_link_train(dp, dp->video_info.max_lane_count,
@ -1197,6 +1197,7 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
DRM_ERROR("failed to setup the panel ret = %d\n", ret);
dp->psr_enable = false;
dp->fast_train_enable = false;
dp->dpms_mode = DRM_MODE_DPMS_OFF;
}

2
drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
View file

@ -173,7 +173,7 @@ struct analogix_dp_device {
int hpd_gpio;
bool force_hpd;
bool psr_enable;
bool fast_train_support;
bool fast_train_enable;
struct mutex panel_lock;
bool panel_is_modeset;