From: Caesar Wang Date: Sat, 10 Dec 2016 02:49:19 +0000 (+0800) Subject: drm/bridge: analogix_dp: set the DPCD600 during disabling PSR X-Git-Tag: android-x86-8.1-r1~4055^2~48^2~93 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=2289b3e11f39148f5146de5708d266eacd934a22;p=android-x86%2Fkernel.git 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 Signed-off-by: Archit Taneja Link: http://patchwork.freedesktop.org/patch/msgid/1481338159-7189-1-git-send-email-wxt@rock-chips.com --- 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; }