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MLK-18618-2: hdp: Recovery pre video mode after cable plugin 

The patch can fix 4Kp60 video mode failed to work afer cable
plugout/in.
DRM driver will not call mode set function if video mode isn't changed.
But for 4Kp60, scrambling and TMDS_Bit_Clock_Ratio should
reconfiguration after cable plugin.

Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
pull/10/head
Sandor Yu 2018-06-15 10:41:47 +08:00 committed by Jason Liu
parent 155b778b66
commit 94dd4efbf7
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/imx/hdp/imx-hdp.c
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@ -994,6 +994,10 @@ static void hotplug_work_func(struct work_struct *work)
if (connector->status == connector_status_connected) {
/* Cable Connected */
/* For HDMI2.0 SCDC should setup again.
* So recovery pre video mode if it is 4Kp60 */
if (drm_mode_equal(&hdp->video.pre_mode, &edid_cea_modes[3]))
imx_hdp_mode_setup(hdp, &hdp->video.pre_mode);
DRM_INFO("HDMI/DP Cable Plug In\n");
enable_irq(hdp->irq[HPD_IRQ_OUT]);
} else if (connector->status == connector_status_disconnected) {