From: Sean Paul <seanpaul@xxxxxxxxxxxx> [ 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@xxxxxxxxxx Link to v2: https://patchwork.freedesktop.org/patch/msgid/20190326204509.96515-2-sean@xxxxxxxxxx Link to v3: https://patchwork.freedesktop.org/patch/msgid/20190502194956.218441-9-sean@xxxxxxxxxx Link to v4: https://patchwork.freedesktop.org/patch/msgid/20190508160920.144739-8-sean@xxxxxxxxxx Cc: Zain Wang <wzz@xxxxxxxxxxxxxx> Cc: Tomasz Figa <tfiga@xxxxxxxxxxxx> Tested-by: Heiko Stuebner <heiko@xxxxxxxxx> Reviewed-by: Heiko Stuebner <heiko@xxxxxxxxx> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20190611160844.257498-8-sean@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 d68986cea1325..84abf5d6f760a 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -1040,16 +1040,17 @@ 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; } -- 2.20.1
