From: Sean Paul seanpaul@chromium.org
[ Upstream commit ad309284a52be47c8b3126c9376358bf381861bc ]
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@po... Link to v2: https://patchwork.freedesktop.org/patch/msgid/20190326204509.96515-2-sean@po... Link to v3: https://patchwork.freedesktop.org/patch/msgid/20190502194956.218441-9-sean@p... Link to v4: https://patchwork.freedesktop.org/patch/msgid/20190508160920.144739-8-sean@p...
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@p... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 3f7f4880be091..37bd541166a5e 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1035,16 +1035,17 @@ 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; }