diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/805-display-0030-drm-imx-hdp-fix-issue-with-non-SCDC-HDMI-sinks.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/805-display-0030-drm-imx-hdp-fix-issue-with-non-SCDC-HDMI-sinks.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/805-display-0030-drm-imx-hdp-fix-issue-with-non-SCDC-HDMI-sinks.patch b/target/linux/layerscape/patches-5.4/805-display-0030-drm-imx-hdp-fix-issue-with-non-SCDC-HDMI-sinks.patch new file mode 100644 index 0000000000..be72d1fd38 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/805-display-0030-drm-imx-hdp-fix-issue-with-non-SCDC-HDMI-sinks.patch @@ -0,0 +1,60 @@ +From d9440f7cb8fa5853b9dcc6e2b165725ac3e8b70c Mon Sep 17 00:00:00 2001 +From: Laurentiu Palcu <laurentiu.palcu@nxp.com> +Date: Wed, 27 Nov 2019 13:34:51 +0200 +Subject: [PATCH] drm/imx/hdp: fix issue with non-SCDC HDMI sinks + +Currently, if sink does not support SCDC, even if the sink is HDMI 1.4 or 2.0, +the hdmi_type is left to default value (MODE_DVI). Hence the HDMI controler is +not properly initialized when cdns_hdmi_ctrl_init() is called. + +Signed-off-by: Laurentiu Palcu <laurentiu.palcu@nxp.com> +Reported-by: Jared Hu <jared.hu@nxp.com> +Reviewed-by: Sandor Yu <sandor.yu@nxp.com> +--- + drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c | 20 ++++++++++---------- + 1 file changed, 10 insertions(+), 10 deletions(-) + +--- a/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c ++++ b/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c +@@ -29,11 +29,17 @@ + static void hdmi_sink_config(struct cdns_mhdp_device *mhdp) + { + struct drm_scdc *scdc = &mhdp->connector.base.display_info.hdmi.scdc; +- u8 buff; ++ struct drm_display_info *di = &mhdp->connector.base.display_info; ++ u8 buff = 0; ++ ++ if (scdc->supported || di->color_formats & DRM_COLOR_FORMAT_YCRCB420) ++ mhdp->hdmi.hdmi_type = MODE_HDMI_2_0; ++ else ++ mhdp->hdmi.hdmi_type = MODE_HDMI_1_4; + + /* check sink support SCDC or not */ +- if (scdc->supported != true) { +- DRM_INFO("Sink Not Support SCDC\n"); ++ if (!scdc->supported) { ++ DRM_INFO("Sink does not support SCDC\n"); + return; + } + +@@ -43,19 +49,13 @@ static void hdmi_sink_config(struct cdns + * Enable scrambling and TMDS_Bit_Clock_Ratio + */ + buff = SCDC_TMDS_BIT_CLOCK_RATIO_BY_40 | SCDC_SCRAMBLING_ENABLE; +- mhdp->hdmi.hdmi_type = MODE_HDMI_2_0; + } else if (scdc->scrambling.low_rates) { + /* + * Enable scrambling and HDMI2.0 when scrambling capability of sink + * be indicated in the HF-VSDB LTE_340Mcsc_scramble bit + */ + buff = SCDC_SCRAMBLING_ENABLE; +- mhdp->hdmi.hdmi_type = MODE_HDMI_2_0; +- } else { +- /* Default work in HDMI1.4 */ +- buff = 0; +- mhdp->hdmi.hdmi_type = MODE_HDMI_1_4; +- } ++ } + + /* TMDS config */ + cdns_hdmi_scdc_write(mhdp, 0x20, buff); |