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authorCaesar Wang <wxt@rock-chips.com>2016-12-10 10:49:19 +0800
committerArchit Taneja <architt@codeaurora.org>2016-12-15 15:07:12 +0530
commit2289b3e11f39148f5146de5708d266eacd934a22 (patch)
tree5599ca171fbd94c45f18f800c9ff98192bb53131
parentd92df868a56cac7804967f67a038a90a90591fed (diff)
drm/bridge: analogix_dp: set the DPCD600 during disabling PSR
It looks like the BOE panel FW didn't ack the DPCD600 signal from the host device, this will cause the panel to hang on the startup display. The root cause is that we use the fast link mode when we enter and exit PSR, the issue is gone if we switch from the fast link to main link mode. Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> Link: http://patchwork.freedesktop.org/patch/msgid/1481338159-7189-1-git-send-email-wxt@rock-chips.com
-rw-r--r--drivers/gpu/drm/bridge/analogix/analogix_dp_core.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index eb9bf8786c24..134bd28337a9 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -133,6 +133,7 @@ int analogix_dp_disable_psr(struct device *dev)
{
struct analogix_dp_device *dp = dev_get_drvdata(dev);
struct edp_vsc_psr psr_vsc;
+ int ret;
if (!dp->psr_support)
return 0;
@@ -147,6 +148,10 @@ int analogix_dp_disable_psr(struct device *dev)
psr_vsc.DB0 = 0;
psr_vsc.DB1 = 0;
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+ if (ret != 1)
+ dev_err(dp->dev, "Failed to set DP Power0 %d\n", ret);
+
analogix_dp_send_psr_spd(dp, &psr_vsc);
return 0;
}