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drm/rockchip: Check for fast link training before enabling psr

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[ Upstream commit ad309284a5 ]

Once we start shutting off the link during PSR, we're going to want fast
training to work. If the display doesn't support fast training, don't
enable psr.

Changes in v2:
- None
Changes in v3:
- None
Changes in v4:
- None
Changes in v5:
- None

Link to v1: https://patchwork.freedesktop.org/patch/msgid/20190228210939.83386-3-sean@poorly.run
Link to v2: https://patchwork.freedesktop.org/patch/msgid/20190326204509.96515-2-sean@poorly.run
Link to v3: https://patchwork.freedesktop.org/patch/msgid/20190502194956.218441-9-sean@poorly.run
Link to v4: https://patchwork.freedesktop.org/patch/msgid/20190508160920.144739-8-sean@poorly.run

Cc: Zain Wang <wzz@rock-chips.com>
Cc: Tomasz Figa <tfiga@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190611160844.257498-8-sean@poorly.run
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sean Paul
2019-06-11 12:08:21 -04:00
committed by Greg Kroah-Hartman
parent d85e0b4ef1
commit d8847b4b3a
1 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
View File

@@ -1036,16 +1036,17 @@ static int analogix_dp_commit(struct analogix_dp_device *dp)
if (ret)
return ret;
/* Check whether panel supports fast training */
ret = analogix_dp_fast_link_train_detection(dp);
if (ret)
dp->psr_enable = false;
if (dp->psr_enable) {
ret = analogix_dp_enable_sink_psr(dp);
if (ret)
return ret;
}
/* Check whether panel supports fast training */
ret = analogix_dp_fast_link_train_detection(dp);
if (ret)
dp->psr_enable = false;
return ret;
}