[Intel-gfx] [PATCH] drm/i915/display: Read DP link status with DRM helper function

[Mika Kahola]

The patch proposes that we read DP link status with DRM helper function
instead of intel specific one. Functionally there are no changes.

Signed-off-by: Mika Kahola <mika.kahola at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c             | 13 +------------
 drivers/gpu/drm/i915/display/intel_dp.h             |  2 --
 .../gpu/drm/i915/display/intel_dp_link_training.c   |  6 ++++--
 3 files changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 2f31d226c6eb..c01d790208d1 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3767,17 +3767,6 @@ static void chv_dp_post_pll_disable(struct intel_encoder *encoder,
 	chv_phy_post_pll_disable(encoder, old_crtc_state);
 }
 
-/*
- * Fetch AUX CH registers 0x202 - 0x207 which contain
- * link status information
- */
-bool
-intel_dp_get_link_status(struct intel_dp *intel_dp, u8 link_status[DP_LINK_STATUS_SIZE])
-{
-	return drm_dp_dpcd_read(&intel_dp->aux, DP_LANE0_1_STATUS, link_status,
-				DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;
-}
-
 /* These are source-specific values. */
 u8
 intel_dp_voltage_max(struct intel_dp *intel_dp)
@@ -5077,7 +5066,7 @@ intel_dp_needs_link_retrain(struct intel_dp *intel_dp)
 	if (intel_psr_enabled(intel_dp))
 		return false;
 
-	if (!intel_dp_get_link_status(intel_dp, link_status))
+	if (drm_dp_dpcd_read_link_status(&intel_dp->aux, link_status) <= 0)
 		return false;
 
 	/*
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 3da166054788..7595326798d2 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -101,8 +101,6 @@ void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
 			   u8 *link_bw, u8 *rate_select);
 bool intel_dp_source_supports_hbr2(struct intel_dp *intel_dp);
 bool intel_dp_source_supports_hbr3(struct intel_dp *intel_dp);
-bool
-intel_dp_get_link_status(struct intel_dp *intel_dp, u8 *link_status);
 
 bool intel_dp_read_dpcd(struct intel_dp *intel_dp);
 bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp);
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index 2a1130dd1ad0..edffdb88ab4e 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -192,7 +192,8 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp)
 
 		drm_dp_link_train_clock_recovery_delay(intel_dp->dpcd);
 
-		if (!intel_dp_get_link_status(intel_dp, link_status)) {
+		if (drm_dp_dpcd_read_link_status(&intel_dp->aux,
+						 link_status) <= 0) {
 			DRM_ERROR("failed to get link status\n");
 			return false;
 		}
@@ -302,7 +303,8 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp)
 	for (tries = 0; tries < 5; tries++) {
 
 		drm_dp_link_train_channel_eq_delay(intel_dp->dpcd);
-		if (!intel_dp_get_link_status(intel_dp, link_status)) {
+		if (drm_dp_dpcd_read_link_status(&intel_dp->aux,
+						 link_status) <= 0) {
 			DRM_ERROR("failed to get link status\n");
 			break;
 		}
-- 
2.17.1