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path: root/drivers/gpu/drm/i915/vlv_dsi.c
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Diffstat (limited to 'drivers/gpu/drm/i915/vlv_dsi.c')
-rw-r--r--drivers/gpu/drm/i915/vlv_dsi.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/vlv_dsi.c b/drivers/gpu/drm/i915/vlv_dsi.c
index 6403728fe778..31c93c3ccd00 100644
--- a/drivers/gpu/drm/i915/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/vlv_dsi.c
@@ -256,6 +256,28 @@ static void band_gap_reset(struct drm_i915_private *dev_priv)
mutex_unlock(&dev_priv->sb_lock);
}
+static int bdw_get_pipemisc_bpp(struct intel_crtc *crtc)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ u32 tmp;
+
+ tmp = I915_READ(PIPEMISC(crtc->pipe));
+
+ switch (tmp & PIPEMISC_DITHER_BPC_MASK) {
+ case PIPEMISC_DITHER_6_BPC:
+ return 18;
+ case PIPEMISC_DITHER_8_BPC:
+ return 24;
+ case PIPEMISC_DITHER_10_BPC:
+ return 30;
+ case PIPEMISC_DITHER_12_BPC:
+ return 36;
+ default:
+ MISSING_CASE(tmp);
+ return 0;
+ }
+}
+
static int intel_dsi_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state)
@@ -1071,6 +1093,8 @@ static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder,
bpp = mipi_dsi_pixel_format_to_bpp(
pixel_format_from_register_bits(fmt));
+ pipe_config->pipe_bpp = bdw_get_pipemisc_bpp(crtc);
+
/* Enable Frame time stamo based scanline reporting */
adjusted_mode->private_flags |=
I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
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