diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/tegra/dsi.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index e967ae1d6ca6..60b802205546 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -724,6 +724,30 @@ static void tegra_dsi_disable(struct tegra_dsi *dsi) usleep_range(5000, 10000); } +static void tegra_dsi_soft_reset(struct tegra_dsi *dsi) +{ + u32 value; + + value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL); + value &= ~DSI_POWER_CONTROL_ENABLE; + tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL); + + usleep_range(300, 1000); + + value = tegra_dsi_readl(dsi, DSI_POWER_CONTROL); + value |= DSI_POWER_CONTROL_ENABLE; + tegra_dsi_writel(dsi, value, DSI_POWER_CONTROL); + + usleep_range(300, 1000); + + value = tegra_dsi_readl(dsi, DSI_TRIGGER); + if (value) + tegra_dsi_writel(dsi, 0, DSI_TRIGGER); + + if (dsi->slave) + tegra_dsi_soft_reset(dsi->slave); +} + static int tegra_output_dsi_disable(struct tegra_output *output) { struct tegra_dc *dc = to_tegra_dc(output->encoder.crtc); @@ -762,6 +786,7 @@ static int tegra_output_dsi_disable(struct tegra_output *output) if (err < 0) dev_dbg(dsi->dev, "failed to idle DSI: %d\n", err); + tegra_dsi_soft_reset(dsi); tegra_dsi_disable(dsi); dsi->enabled = false; |