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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/tegra: hdmi - Use proper power-up sequence
This reflects the power-up sequence as described in the documentation,
but it doesn't seem to be strictly necessary to get HDMI to work.
Signed-off-by: Thierry Reding <treding@nvidia.com>
+11
+11
drivers/gpu/drm/tegra/hdmi.c
+11
drivers/gpu/drm/tegra/hdmi.c
···
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737
usleep_range(1000, 2000);
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reset_control_deassert(hdmi->rst);
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740
+
/* power up sequence */
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value = tegra_hdmi_readl(hdmi, HDMI_NV_PDISP_SOR_PLL0);
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value &= ~SOR_PLL_PDBG;
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tegra_hdmi_writel(hdmi, value, HDMI_NV_PDISP_SOR_PLL0);
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usleep_range(10, 20);
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+
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value = tegra_hdmi_readl(hdmi, HDMI_NV_PDISP_SOR_PLL0);
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value &= ~SOR_PLL_PWR;
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tegra_hdmi_writel(hdmi, value, HDMI_NV_PDISP_SOR_PLL0);
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+
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tegra_dc_writel(dc, VSYNC_H_POSITION(1),
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DC_DISP_DISP_TIMING_OPTIONS);
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tegra_dc_writel(dc, DITHER_CONTROL_DISABLE | BASE_COLOR_SIZE888,