[PATCH 2/4] drm/i915/display: Use joined pipes in intel_dp_joiner_needs_dsc

[Ankit Nautiyal]

In preparation of ultrajoiner, use number of joined pipes in the
intel_dp_joiner_needs_dsc helper, instead of joiner flag.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c     | 16 ++++++++++++----
 drivers/gpu/drm/i915/display/intel_dp.h     |  3 ++-
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 10 ++++++++--
 3 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index cb0f6db5f8e7..f6900f1ff36f 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1318,6 +1318,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 	u8 dsc_slice_count = 0;
 	enum drm_mode_status status;
 	bool dsc = false, joiner = false;
+	int num_joined_pipes;
 
 	status = intel_cpu_transcoder_mode_valid(dev_priv, mode);
 	if (status != MODE_OK)
@@ -1343,6 +1344,9 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 		joiner = true;
 		max_dotclk *= 2;
 	}
+
+	num_joined_pipes = joiner ? 2 : 1;
+
 	if (target_clock > max_dotclk)
 		return MODE_CLOCK_HIGH;
 
@@ -1399,7 +1403,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
 		dsc = dsc_max_compressed_bpp && dsc_slice_count;
 	}
 
-	if (intel_dp_joiner_needs_dsc(dev_priv, joiner) && !dsc)
+	if (intel_dp_joiner_needs_dsc(dev_priv, num_joined_pipes) && !dsc)
 		return MODE_CLOCK_HIGH;
 
 	if (mode_rate > max_rate && !dsc)
@@ -2513,14 +2517,15 @@ int intel_dp_config_required_rate(const struct intel_crtc_state *crtc_state)
 	return intel_dp_link_required(adjusted_mode->crtc_clock, bpp);
 }
 
-bool intel_dp_joiner_needs_dsc(struct drm_i915_private *i915, bool use_joiner)
+bool intel_dp_joiner_needs_dsc(struct drm_i915_private *i915,
+			       int num_joined_pipes)
 {
 	/*
 	 * Pipe joiner needs compression up to display 12 due to bandwidth
 	 * limitation. DG2 onwards pipe joiner can be enabled without
 	 * compression.
 	 */
-	return DISPLAY_VER(i915) < 13 && use_joiner;
+	return DISPLAY_VER(i915) < 13 && num_joined_pipes == 2;
 }
 
 static int
@@ -2538,6 +2543,7 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
 	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
 	struct link_config_limits limits;
 	bool dsc_needed, joiner_needs_dsc;
+	int num_joined_pipes;
 	int ret = 0;
 
 	if (pipe_config->fec_enable &&
@@ -2549,7 +2555,9 @@ intel_dp_compute_link_config(struct intel_encoder *encoder,
 				 adjusted_mode->crtc_clock))
 		pipe_config->joiner_pipes = GENMASK(crtc->pipe + 1, crtc->pipe);
 
-	joiner_needs_dsc = intel_dp_joiner_needs_dsc(i915, pipe_config->joiner_pipes);
+	num_joined_pipes = pipe_config->joiner_pipes ? 2 : 1;
+
+	joiner_needs_dsc = intel_dp_joiner_needs_dsc(i915, num_joined_pipes);
 
 	dsc_needed = joiner_needs_dsc || intel_dp->force_dsc_en ||
 		     !intel_dp_compute_config_limits(intel_dp, pipe_config,
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 1b9aaddd8c35..3aef57dd463a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -123,7 +123,8 @@ int intel_dp_effective_data_rate(int pixel_clock, int bpp_x16,
 				 int bw_overhead);
 int intel_dp_max_link_data_rate(struct intel_dp *intel_dp,
 				int max_dprx_rate, int max_dprx_lanes);
-bool intel_dp_joiner_needs_dsc(struct drm_i915_private *i915, bool use_joiner);
+bool intel_dp_joiner_needs_dsc(struct drm_i915_private *i915,
+			       int num_joined_pipes);
 bool intel_dp_has_joiner(struct intel_dp *intel_dp);
 bool intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
 			    const struct drm_connector_state *conn_state);
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 15541932b809..1868747cfb12 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -568,6 +568,7 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 		&pipe_config->hw.adjusted_mode;
 	struct link_config_limits limits;
 	bool dsc_needed, joiner_needs_dsc;
+	int num_joined_pipes;
 	int ret = 0;
 
 	if (pipe_config->fec_enable &&
@@ -582,11 +583,13 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
 				 adjusted_mode->crtc_clock))
 		pipe_config->joiner_pipes = GENMASK(crtc->pipe + 1, crtc->pipe);
 
+	num_joined_pipes = pipe_config->joiner_pipes ? 2 : 1;
+
 	pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
 	pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
 	pipe_config->has_pch_encoder = false;
 
-	joiner_needs_dsc = intel_dp_joiner_needs_dsc(dev_priv, pipe_config->joiner_pipes);
+	joiner_needs_dsc = intel_dp_joiner_needs_dsc(dev_priv, num_joined_pipes);
 
 	dsc_needed = joiner_needs_dsc || intel_dp->force_dsc_en ||
 		     !intel_dp_mst_compute_config_limits(intel_dp,
@@ -1426,6 +1429,7 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 	u16 dsc_max_compressed_bpp = 0;
 	u8 dsc_slice_count = 0;
 	int target_clock = mode->clock;
+	int num_joined_pipes;
 
 	if (drm_connector_is_unregistered(connector)) {
 		*status = MODE_ERROR;
@@ -1471,6 +1475,8 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 		max_dotclk *= 2;
 	}
 
+	num_joined_pipes = joiner ? 2 : 1;
+
 	ret = drm_modeset_lock(&mgr->base.lock, ctx);
 	if (ret)
 		return ret;
@@ -1508,7 +1514,7 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
 		dsc = dsc_max_compressed_bpp && dsc_slice_count;
 	}
 
-	if (intel_dp_joiner_needs_dsc(dev_priv, joiner) && !dsc) {
+	if (intel_dp_joiner_needs_dsc(dev_priv, num_joined_pipes) && !dsc) {
 		*status = MODE_CLOCK_HIGH;
 		return 0;
 	}
-- 
2.45.2