drm/i915/dp_link_caps: Pass link_caps to common rate helpers

Pass the link_caps pointer to the common rate helpers in
intel_dp_link_caps.c, as it holds the state with the relevant
information.

Reviewed-by: Nemesa Garg <nemesa.garg@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20260616200849.3534628-29-imre.deak@intel.com

5 files changed, 25 insertions, 27 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index e1639e8406d5..50819e633f24 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1551,14 +1551,15 @@ intel_dp_max_link_rate(struct intel_dp *intel_dp)
 		return forced_params.rate;
 
 	intel_dp_link_caps_get_max_limits(link_caps, &max_link_limits);
-	len = intel_dp_common_len_rate_limit(intel_dp, max_link_limits.rate);
+	len = intel_dp_common_len_rate_limit(link_caps, max_link_limits.rate);
 
-	return intel_dp_common_rate(intel_dp, len - 1);
+	return intel_dp_common_rate(link_caps, len - 1);
 }
 
 static int
 intel_dp_min_link_rate(struct intel_dp *intel_dp)
 {
+	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
 	struct intel_dp_link_config forced_params;
 
 	intel_dp_link_caps_get_forced_params(intel_dp->link.caps, &forced_params);
@@ -1566,7 +1567,7 @@ intel_dp_min_link_rate(struct intel_dp *intel_dp)
 	if (forced_params.rate)
 		return forced_params.rate;
 
-	return intel_dp_common_rate(intel_dp, 0);
+	return intel_dp_common_rate(link_caps, 0);
 }
 
 int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
@@ -1750,6 +1751,7 @@ intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
 				  const struct drm_connector_state *conn_state,
 				  const struct link_config_limits *limits)
 {
+	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
 	int bpp, i, lane_count, clock = intel_dp_mode_clock(pipe_config, conn_state);
 	int link_rate, link_avail;
 
@@ -1760,7 +1762,7 @@ intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
 			intel_dp_output_format_link_bpp_x16(pipe_config->output_format, bpp);
 
 		for (i = 0; i < intel_dp_link_caps_num_common_rates(intel_dp->link.caps); i++) {
-			link_rate = intel_dp_common_rate(intel_dp, i);
+			link_rate = intel_dp_common_rate(link_caps, i);
 			if (link_rate < limits->min_rate ||
 			    link_rate > limits->max_rate)
 				continue;
@@ -1984,12 +1986,13 @@ static int dsc_compute_link_config(struct intel_dp *intel_dp,
 				   const struct link_config_limits *limits,
 				   int dsc_bpp_x16)
 {
+	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
 	const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
 	int link_rate, lane_count;
 	int i;
 
 	for (i = 0; i < intel_dp_link_caps_num_common_rates(intel_dp->link.caps); i++) {
-		link_rate = intel_dp_common_rate(intel_dp, i);
+		link_rate = intel_dp_common_rate(link_caps, i);
 		if (link_rate < limits->min_rate || link_rate > limits->max_rate)
 			continue;
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_caps.c b/drivers/gpu/drm/i915/display/intel_dp_link_caps.c
index c5701f02fbf6..0917e7f51a26 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_caps.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_caps.c
@@ -60,19 +60,16 @@ struct intel_dp_link_caps {
 };
 
 /* Get length of common rates array potentially limited by max_rate. */
-int intel_dp_common_len_rate_limit(const struct intel_dp *intel_dp,
+int intel_dp_common_len_rate_limit(struct intel_dp_link_caps *link_caps,
 				   int max_rate)
 {
-	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
-
 	return intel_dp_rate_limit_len(link_caps->rates,
 				       link_caps->num_rates, max_rate);
 }
 
-int intel_dp_common_rate(struct intel_dp *intel_dp, int index)
+int intel_dp_common_rate(struct intel_dp_link_caps *link_caps, int index)
 {
-	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
-	struct intel_display *display = to_intel_display(intel_dp);
+	struct intel_display *display = to_intel_display(link_caps->dp);
 
 	if (drm_WARN_ON(display->drm,
 			index < 0 || index >= link_caps->num_rates))
@@ -89,11 +86,9 @@ int intel_dp_link_caps_common_rate_idx(struct intel_dp_link_caps *link_caps, int
 }
 
 /* Theoretical max between source and sink */
-int intel_dp_max_common_rate(struct intel_dp *intel_dp)
+int intel_dp_max_common_rate(struct intel_dp_link_caps *link_caps)
 {
-	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
-
-	return intel_dp_common_rate(intel_dp, link_caps->num_rates - 1);
+	return intel_dp_common_rate(link_caps, link_caps->num_rates - 1);
 }
 
 int intel_dp_link_caps_num_common_rates(struct intel_dp_link_caps *link_caps)
@@ -129,17 +124,16 @@ static int forced_lane_count(struct intel_dp_link_caps *link_caps)
 
 static int forced_link_rate(struct intel_dp_link_caps *link_caps)
 {
-	struct intel_dp *intel_dp = link_caps->dp;
 	int len;
 
 	if (!link_caps->forced_params.rate)
 		return 0;
 
-	len = intel_dp_common_len_rate_limit(intel_dp, link_caps->forced_params.rate);
+	len = intel_dp_common_len_rate_limit(link_caps, link_caps->forced_params.rate);
 	if (len == 0)
-		return intel_dp_common_rate(intel_dp, 0);
+		return intel_dp_common_rate(link_caps, 0);
 
-	return intel_dp_common_rate(intel_dp, len - 1);
+	return intel_dp_common_rate(link_caps, len - 1);
 }
 
 void intel_dp_link_caps_get_forced_params(struct intel_dp_link_caps *link_caps,
@@ -152,7 +146,7 @@ void intel_dp_link_caps_get_forced_params(struct intel_dp_link_caps *link_caps,
 static int intel_dp_link_config_rate(struct intel_dp_link_caps *link_caps,
 				     const struct intel_dp_link_config_entry *lc)
 {
-	return intel_dp_common_rate(link_caps->dp, lc->link_rate_idx);
+	return intel_dp_common_rate(link_caps, lc->link_rate_idx);
 }
 
 static int intel_dp_link_config_lane_count(const struct intel_dp_link_config_entry *lc)
@@ -169,7 +163,7 @@ static void set_max_link_limits_no_update(struct intel_dp_link_caps *link_caps,
 static void reset_max_link_limits_no_update(struct intel_dp_link_caps *link_caps)
 {
 	struct intel_dp_link_config max_link_limits = {
-		.rate = intel_dp_max_common_rate(link_caps->dp),
+		.rate = intel_dp_max_common_rate(link_caps),
 		.lane_count = intel_dp_link_caps_max_common_lane_count(link_caps),
 	};
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_caps.h b/drivers/gpu/drm/i915/display/intel_dp_link_caps.h
index 9256f02fed11..af9028e7cb98 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_caps.h
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_caps.h
@@ -11,11 +11,11 @@ struct intel_dp;
 struct intel_dp_link_caps;
 struct intel_dp_link_config;
 
-int intel_dp_common_len_rate_limit(const struct intel_dp *intel_dp,
+int intel_dp_common_len_rate_limit(struct intel_dp_link_caps *link_caps,
 				   int max_rate);
-int intel_dp_common_rate(struct intel_dp *intel_dp, int index);
+int intel_dp_common_rate(struct intel_dp_link_caps *link_caps, int index);
 int intel_dp_link_caps_common_rate_idx(struct intel_dp_link_caps *link_caps, int rate);
-int intel_dp_max_common_rate(struct intel_dp *intel_dp);
+int intel_dp_max_common_rate(struct intel_dp_link_caps *link_caps);
 int intel_dp_link_caps_num_common_rates(struct intel_dp_link_caps *link_caps);
 int intel_dp_link_caps_max_common_lane_count(struct intel_dp_link_caps *link_caps);
 
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 0d4a0bf1dac5..b521dd11b62a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -1898,7 +1898,7 @@ static int reduce_link_rate(struct intel_dp *intel_dp, int current_rate)
 	if (rate_index <= 0)
 		return -1;
 
-	new_rate = intel_dp_common_rate(intel_dp, rate_index - 1);
+	new_rate = intel_dp_common_rate(link_caps, rate_index - 1);
 
 	/* TODO: Make switching from UHBR to non-UHBR rates work. */
 	if (drm_dp_is_uhbr_rate(current_rate) != drm_dp_is_uhbr_rate(new_rate))
@@ -1925,6 +1925,7 @@ static bool reduce_link_params_in_rate_lane_order(struct intel_dp *intel_dp,
 						  const struct intel_crtc_state *crtc_state,
 						  int *new_link_rate, int *new_lane_count)
 {
+	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
 	int link_rate;
 	int lane_count;
 
@@ -1932,7 +1933,7 @@ static bool reduce_link_params_in_rate_lane_order(struct intel_dp *intel_dp,
 	link_rate = reduce_link_rate(intel_dp, crtc_state->port_clock);
 	if (link_rate < 0) {
 		lane_count = reduce_lane_count(intel_dp, crtc_state->lane_count);
-		link_rate = intel_dp_max_common_rate(intel_dp);
+		link_rate = intel_dp_max_common_rate(link_caps);
 	}
 
 	if (lane_count < 0)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_tunnel.c b/drivers/gpu/drm/i915/display/intel_dp_tunnel.c
index 9d9d8d04742b..76e9753766b9 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_tunnel.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_tunnel.c
@@ -58,7 +58,7 @@ static int kbytes_to_mbits(int kbytes)
 static int get_current_link_bw(struct intel_dp *intel_dp)
 {
 	struct intel_dp_link_caps *link_caps = intel_dp->link.caps;
-	int rate = intel_dp_max_common_rate(intel_dp);
+	int rate = intel_dp_max_common_rate(link_caps);
 	int lane_count = intel_dp_link_caps_max_common_lane_count(link_caps);
 
 	return intel_dp_max_link_data_rate(intel_dp, rate, lane_count);