diff options
Diffstat (limited to 'drivers/gpu/drm/tegra/rgb.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/rgb.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c index 79566c9ea8ff..fc66bbd913b2 100644 --- a/drivers/gpu/drm/tegra/rgb.c +++ b/drivers/gpu/drm/tegra/rgb.c @@ -99,6 +99,7 @@ static void tegra_rgb_encoder_disable(struct drm_encoder *encoder) static void tegra_rgb_encoder_enable(struct drm_encoder *encoder) { + struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; struct tegra_output *output = encoder_to_output(encoder); struct tegra_rgb *rgb = to_rgb(output); u32 value; @@ -108,10 +109,19 @@ static void tegra_rgb_encoder_enable(struct drm_encoder *encoder) value = DE_SELECT_ACTIVE | DE_CONTROL_NORMAL; tegra_dc_writel(rgb->dc, value, DC_DISP_DATA_ENABLE_OPTIONS); - /* XXX: parameterize? */ + /* configure H- and V-sync signal polarities */ value = tegra_dc_readl(rgb->dc, DC_COM_PIN_OUTPUT_POLARITY(1)); - value &= ~LVS_OUTPUT_POLARITY_LOW; - value &= ~LHS_OUTPUT_POLARITY_LOW; + + if (mode->flags & DRM_MODE_FLAG_NHSYNC) + value |= LHS_OUTPUT_POLARITY_LOW; + else + value &= ~LHS_OUTPUT_POLARITY_LOW; + + if (mode->flags & DRM_MODE_FLAG_NVSYNC) + value |= LVS_OUTPUT_POLARITY_LOW; + else + value &= ~LVS_OUTPUT_POLARITY_LOW; + tegra_dc_writel(rgb->dc, value, DC_COM_PIN_OUTPUT_POLARITY(1)); /* XXX: parameterize? */ |