drm/i915/dp: Fix link compute m_n calc for DSC

Fix the intel_link_compute_m_n in case of display stream
compression. This patch passes the compressed_bpp to
intel_link_compute_m_n if compression is enabled.

Fixes: a4a157777c80 ("drm/i915/dp: Compute DSC pipe config in atomic check")
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181201010412.32372-1-manasi.d.navare@intel.com

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 38a6e82..a6907a1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2173,7 +2173,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
                                       &pipe_config->dp_m_n,
                                       constant_n);
        else
-               intel_link_compute_m_n(pipe_config->dsc_params.compression_enable,
+               intel_link_compute_m_n(pipe_config->dsc_params.compressed_bpp,
                                       pipe_config->lane_count,
                                       adjusted_mode->crtc_clock,
                                       pipe_config->port_clock,