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| author | Thierry Reding <treding@nvidia.com> | 2014-04-16 08:46:24 (GMT) |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2014-06-05 21:09:24 (GMT) |
| commit | 8c8282c04d6aef91db1729cd5a2ab314598d23ed (patch) | |
| tree | 74bfd0f1e0839187255509dc937d37d30f46360c | |
| parent | d06e7f8f666483e0f0719245c1056490523e0805 (diff) | |
| download | linux-8c8282c04d6aef91db1729cd5a2ab314598d23ed.tar.xz | |
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>
| -rw-r--r-- | drivers/gpu/drm/tegra/hdmi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c index 5bc2659..4116b08 100644 --- a/drivers/gpu/drm/tegra/hdmi.c +++ b/drivers/gpu/drm/tegra/hdmi.c @@ -737,6 +737,17 @@ static int tegra_output_hdmi_enable(struct tegra_output *output) usleep_range(1000, 2000); reset_control_deassert(hdmi->rst); + /* power up sequence */ + value = tegra_hdmi_readl(hdmi, HDMI_NV_PDISP_SOR_PLL0); + value &= ~SOR_PLL_PDBG; + tegra_hdmi_writel(hdmi, value, HDMI_NV_PDISP_SOR_PLL0); + + usleep_range(10, 20); + + value = tegra_hdmi_readl(hdmi, HDMI_NV_PDISP_SOR_PLL0); + value &= ~SOR_PLL_PWR; + tegra_hdmi_writel(hdmi, value, HDMI_NV_PDISP_SOR_PLL0); + tegra_dc_writel(dc, VSYNC_H_POSITION(1), DC_DISP_DISP_TIMING_OPTIONS); tegra_dc_writel(dc, DITHER_CONTROL_DISABLE | BASE_COLOR_SIZE888, |