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