diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/805-display-0032-drm-hdmi-imx8-fix-wrong-hdmi-type-with-non-SCDC-HDMI.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/805-display-0032-drm-hdmi-imx8-fix-wrong-hdmi-type-with-non-SCDC-HDMI.patch | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/805-display-0032-drm-hdmi-imx8-fix-wrong-hdmi-type-with-non-SCDC-HDMI.patch b/target/linux/layerscape/patches-5.4/805-display-0032-drm-hdmi-imx8-fix-wrong-hdmi-type-with-non-SCDC-HDMI.patch new file mode 100644 index 0000000000..43b590da5e --- /dev/null +++ b/target/linux/layerscape/patches-5.4/805-display-0032-drm-hdmi-imx8-fix-wrong-hdmi-type-with-non-SCDC-HDMI.patch @@ -0,0 +1,41 @@ +From 94f34486d678f01378f539dee843a74eb476320e Mon Sep 17 00:00:00 2001 +From: Sandor Yu <Sandor.yu@nxp.com> +Date: Fri, 29 Nov 2019 15:00:59 +0800 +Subject: [PATCH] drm: hdmi: imx8: fix wrong hdmi type with non-SCDC HDMI sinks + +hdmi type is uninitialized with non-SCDC HDMI sinks. +And hdmi ctrl will work in DVI mode that is not ecpected. +Set hdmi type to HDMI1.4 before SCDC support check to fix it. + +Signed-off-by: Sandor Yu <Sandor.yu@nxp.com> +--- + drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c | 11 +++++------ + 1 file changed, 5 insertions(+), 6 deletions(-) + +--- a/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c ++++ b/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c +@@ -29,7 +29,10 @@ + static void hdmi_sink_config(struct cdns_mhdp_device *mhdp) + { + struct drm_scdc *scdc = &mhdp->connector.base.display_info.hdmi.scdc; +- u8 buff; ++ u8 buff = 0; ++ ++ /* Default work in HDMI1.4 */ ++ mhdp->hdmi.hdmi_type = MODE_HDMI_1_4; + + /* check sink support SCDC or not */ + if (scdc->supported != true) { +@@ -51,11 +54,7 @@ static void hdmi_sink_config(struct cdns + */ + 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); |