drm/i915: Fix pipe config mismatch for bpp, output format

Read back the pixel fomrat register and get the bpp.

v2: Read the PIPE_MISC register (Jani).

Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1556809862-31203-3-git-send-email-vandita.kulkarni@intel.com

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index 94fbb57..e94f951 100644 (file)
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -1206,6 +1206,7 @@ static void gen11_dsi_get_config(struct intel_encoder *encoder,
                                 struct intel_crtc_state *pipe_config)
 {
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+       struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
 
        /* FIXME: adapt icl_ddi_clock_get() for DSI and use that? */
@@ -1214,6 +1215,7 @@ static void gen11_dsi_get_config(struct intel_encoder *encoder,
        pipe_config->base.adjusted_mode.crtc_clock = intel_dsi->pclk;
        gen11_dsi_get_timings(encoder, pipe_config);
        pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
+       pipe_config->pipe_bpp = bdw_get_pipemisc_bpp(crtc);
 }
 
 static int gen11_dsi_compute_config(struct intel_encoder *encoder,
@@ -1229,6 +1231,7 @@ static int gen11_dsi_compute_config(struct intel_encoder *encoder,
        struct drm_display_mode *adjusted_mode =
                                        &pipe_config->base.adjusted_mode;
 
+       pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
        intel_fixed_panel_mode(fixed_mode, adjusted_mode);
        intel_pch_panel_fitting(crtc, pipe_config, conn_state->scaling_mode);