[PATCH v5 15/36] drm/bridge: analogix_dp: Fix incorrect usage of enhanced mode
From: Archit Taneja <hidden>
Date: 2018-03-14 06:17:34
Also in:
dri-devel, linux-input, linux-rockchip, linux-samsung-soc, lkml
On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
From: zain wang <redacted> Enhanced mode is required by the eDP 1.2 specification, and not doing it early could result in a period of time where we have a link transmitting idle packets without it. Since there is no reason to disable it, we just enable it at the beginning of link training and then keep it on all the time.
Reviewed-by: Archit Taneja <redacted> Thanks, Archit
quoted hunk ↗ jump to hunk
Cc: Tomasz Figa <tfiga@chromium.org> Signed-off-by: zain wang <redacted> Signed-off-by: Sean Paul <redacted> Signed-off-by: Thierry Escande <redacted> Reviewed-by: Andrzej Hajda <redacted> Signed-off-by: Enric Balletbo i Serra <redacted> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++---- 1 file changed, 2 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 6cbde8473f58..1eed35f9eb8d 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c@@ -281,6 +281,8 @@ static int analogix_dp_link_start(struct analogix_dp_device *dp) retval = drm_dp_dpcd_write(&dp->aux, DP_LINK_BW_SET, buf, 2); if (retval < 0) return retval; + /* set enhanced mode if available */ + analogix_dp_set_enhanced_mode(dp); /* Set TX pre-emphasis to minimum */ for (lane = 0; lane < lane_count; lane++)@@ -593,8 +595,6 @@ static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp) dev_dbg(dp->dev, "fast link training %s\n", dp->fast_train_enable ? "supported" : "unsupported"); - /* set enhanced mode if available */ - analogix_dp_set_enhanced_mode(dp); dp->link_train.lt_state = FINISHED; return 0;@@ -940,8 +940,6 @@ static int analogix_dp_commit(struct analogix_dp_device *dp) } analogix_dp_enable_scramble(dp, 1); - analogix_dp_enable_rx_to_enhanced_mode(dp, 1); - analogix_dp_enable_enhanced_mode(dp, 1); analogix_dp_init_video(dp); ret = analogix_dp_config_video(dp);