tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/tegra: hdmi - Disable LVDS mode
Disable LVDS mode according to register documentation. It seems like
this has no effect on the operation of HDMI, but it's probably a good
idea to do this anyway.
Signed-off-by: Thierry Reding <treding@nvidia.com>
+10
-1
+5
-1
drivers/gpu/drm/tegra/hdmi.c
+5
-1
drivers/gpu/drm/tegra/hdmi.c
···
846
846
tegra_hdmi_writel(hdmi, value, HDMI_NV_PDISP_SOR_SEQ_INST(0));
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847
tegra_hdmi_writel(hdmi, value, HDMI_NV_PDISP_SOR_SEQ_INST(8));
848
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849
-
value = 0x1c800;
849
+
value = tegra_hdmi_readl(hdmi, HDMI_NV_PDISP_SOR_CSTM);
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value &= ~SOR_CSTM_ROTCLK(~0);
851
851
value |= SOR_CSTM_ROTCLK(2);
852
+
value |= SOR_CSTM_PLLDIV;
853
+
value &= ~SOR_CSTM_LVDS_ENABLE;
854
+
value &= ~SOR_CSTM_MODE_MASK;
855
+
value |= SOR_CSTM_MODE_TMDS;
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856
tegra_hdmi_writel(hdmi, value, HDMI_NV_PDISP_SOR_CSTM);
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858
/* start SOR */
+5
drivers/gpu/drm/tegra/hdmi.h
+5
drivers/gpu/drm/tegra/hdmi.h
···
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#define HDMI_NV_PDISP_SOR_CSTM 0x5a
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#define SOR_CSTM_ROTCLK(x) (((x) & 0xf) << 24)
193
+
#define SOR_CSTM_PLLDIV (1 << 21)
194
+
#define SOR_CSTM_LVDS_ENABLE (1 << 16)
195
+
#define SOR_CSTM_MODE_LVDS (0 << 12)
196
+
#define SOR_CSTM_MODE_TMDS (1 << 12)
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+
#define SOR_CSTM_MODE_MASK (3 << 12)
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#define HDMI_NV_PDISP_SOR_LVDS 0x5b
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#define HDMI_NV_PDISP_SOR_CRCA 0x5c