[CI,v11,21/23] drm/i915/fec: Set FEC_READY in FEC_CONFIGURATION
diff mbox series

Message ID 20181127180043.21459-21-manasi.d.navare@intel.com
State New
Headers show
  • [CI,v11,01/23] drm/dsc: Modify DRM helper to return complete DSC color depth capabilities
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Commit Message

Navare, Manasi Nov. 27, 2018, 6 p.m. UTC
From: Anusha Srivatsa <anusha.srivatsa@intel.com>

If the panel supports FEC, the driver has to
set the FEC_READY bit in the dpcd register:

This has to happen before link training.

v2: s/intel_dp_set_fec_ready/intel_dp_sink_set_fec_ready
   - change commit message. (Gaurav)

v3: rebased. (r-b Manasi)

v4: Use fec crtc state, before setting FEC_READY
bit. (Anusha)

v5: Move to intel_ddi.c
- Make the function static (Anusha)

v6: Dont pass state as a separate argument (Ville)

v7: (From Manasi)
* Correct the debug print (Ville)

Cc: dri-devel@lists.freedesktop.org
Cc: Gaurav K Singh <gaurav.k.singh@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
 drivers/gpu/drm/i915/intel_ddi.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff mbox series

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 6533624226a7..4c74bbe1cf73 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3102,6 +3102,16 @@  static void icl_program_mg_dp_mode(struct intel_digital_port *intel_dig_port)
 	I915_WRITE(MG_DP_MODE(port, 1), ln1);
+static void intel_dp_sink_set_fec_ready(struct intel_dp *intel_dp,
+					const struct intel_crtc_state *crtc_state)
+	if (!crtc_state->fec_enable)
+		return;
+	if (drm_dp_dpcd_writeb(&intel_dp->aux, DP_FEC_CONFIGURATION, DP_FEC_READY) <= 0)
+		DRM_DEBUG_KMS("Failed to set FEC_READY in the sink\n");
 static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
 				    const struct intel_crtc_state *crtc_state,
 				    const struct drm_connector_state *conn_state)
@@ -3142,6 +3152,7 @@  static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
 		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 	intel_dp_sink_set_decompression_state(intel_dp, crtc_state,
+	intel_dp_sink_set_fec_ready(intel_dp, crtc_state);
 	if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)