drm/i915: Use intel_ddi_get_config() for MST

Eliminate the partially duplicated DDI readout code from MST, and
instead just call intel_ddi_get_config(). As a nice bonus we get
more cross checking as intel_ddi_get_config() will populate
output_types based on the actual mode of the DDI port.

Additonally intel_ddi_get_config() must be changed to get the crtc
from the passed in crtc state rather than from the encoder->crtc link.
encoder->crtc really shouldn't be used anyway.

v2: Rebased on BXT MST latency_optim fix
    Make intel_ddi_clock_get() static

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171027193128.14483-7-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

1 files changed, 1 insertions, 49 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index d523302e5081..6f11bb35f66f 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -286,56 +286,8 @@ static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
 {
         struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
         struct intel_digital_port *intel_dig_port = intel_mst->primary;
-        struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
-        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-        enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
-        u32 temp, flags = 0;
-
-        pipe_config->output_types |= BIT(INTEL_OUTPUT_DP_MST);
-
-        pipe_config->has_audio =
-                intel_ddi_is_audio_enabled(dev_priv, crtc);
-
-        temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
-        if (temp & TRANS_DDI_PHSYNC)
-                flags |= DRM_MODE_FLAG_PHSYNC;
-        else
-                flags |= DRM_MODE_FLAG_NHSYNC;
-        if (temp & TRANS_DDI_PVSYNC)
-                flags |= DRM_MODE_FLAG_PVSYNC;
-        else
-                flags |= DRM_MODE_FLAG_NVSYNC;
-
-        switch (temp & TRANS_DDI_BPC_MASK) {
-        case TRANS_DDI_BPC_6:
-                pipe_config->pipe_bpp = 18;
-                break;
-        case TRANS_DDI_BPC_8:
-                pipe_config->pipe_bpp = 24;
-                break;
-        case TRANS_DDI_BPC_10:
-                pipe_config->pipe_bpp = 30;
-                break;
-        case TRANS_DDI_BPC_12:
-                pipe_config->pipe_bpp = 36;
-                break;
-        default:
-                break;
-        }
-        pipe_config->base.adjusted_mode.flags |= flags;
-
-        pipe_config->lane_count =
-                ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
-
-        intel_dp_get_m_n(crtc, pipe_config);
-
-        intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
 
-        if (IS_GEN9_LP(dev_priv))
-                pipe_config->lane_lat_optim_mask =
-                        bxt_ddi_phy_get_lane_lat_optim_mask(encoder);
-
-        intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
+        intel_ddi_get_config(&intel_dig_port->base, pipe_config);
 }
 
 static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)