drm/i915/dsi: set pipe_bpp on ICL configure config

The ICL DSI pipe_bpp currently comes from
compute_baseline_pipe_bpp(). Fix it.

Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/191f5c4fa5f4af29d4bf7e30bb35f45ce05b33f0.1575974743.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/icl_dsi.c

@@ -1286,6 +1286,11 @@ static int gen11_dsi_compute_config(struct intel_encoder *encoder,
 	else
 		pipe_config->cpu_transcoder = TRANSCODER_DSI_0;
 
+	if (intel_dsi->pixel_format == MIPI_DSI_FMT_RGB888)
+		pipe_config->pipe_bpp = 24;
+	else
+		pipe_config->pipe_bpp = 18;
+
 	pipe_config->clock_set = true;
 	pipe_config->port_clock = intel_dsi_bitrate(intel_dsi) / 5;