[PATCH 2/5] drm/i915/display: Generalize intel_hdmi_dsc_get_num_slices helper

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

Refactor intel_hdmi_dsc_get_num_slices to remove dependency on
intel_crtc_state structure by accepting display mode and output format
as parameters instead.

This makes the function reusable for mode_valid cases where
crtc_state is not present.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c   |  4 +++-
 drivers/gpu/drm/i915/display/intel_hdmi.c | 14 ++++++++------
 drivers/gpu/drm/i915/display/intel_hdmi.h |  4 +++-
 3 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 7f13595f40c1..76d8ebecec32 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4321,7 +4321,9 @@ intel_dp_pcon_dsc_enc_slices(struct intel_dp *intel_dp,
 	int pcon_max_slices = drm_dp_pcon_dsc_max_slices(intel_dp->pcon_dsc_dpcd);
 	int pcon_max_slice_width = drm_dp_pcon_dsc_max_slice_width(intel_dp->pcon_dsc_dpcd);
 
-	return intel_hdmi_dsc_get_num_slices(crtc_state, pcon_max_slices,
+	return intel_hdmi_dsc_get_num_slices(&crtc_state->hw.adjusted_mode,
+					     crtc_state->output_format,
+					     pcon_max_slices,
 					     pcon_max_slice_width,
 					     hdmi_max_slices, hdmi_throughput);
 }
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 9af0f3aba0fc..228c5e2be164 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -3216,7 +3216,8 @@ int intel_hdmi_dsc_get_slice_height(int vactive)
  * intel_hdmi_dsc_get_num_slices - get no. of dsc slices based on dsc encoder
  * and dsc decoder capabilities
  *
- * @crtc_state: intel crtc_state
+ * @mode: drm_display_mode for which num of slices are needed
+ * @output_format : pipe output format
  * @src_max_slices: maximum slices supported by the DSC encoder
  * @src_max_slice_width: maximum slice width supported by DSC encoder
  * @hdmi_max_slices: maximum slices supported by sink DSC decoder
@@ -3226,7 +3227,8 @@ int intel_hdmi_dsc_get_slice_height(int vactive)
  * and decoder.
  */
 int
-intel_hdmi_dsc_get_num_slices(const struct intel_crtc_state *crtc_state,
+intel_hdmi_dsc_get_num_slices(const struct drm_display_mode *mode,
+			      enum intel_output_format output_format,
 			      int src_max_slices, int src_max_slice_width,
 			      int hdmi_max_slices, int hdmi_throughput)
 {
@@ -3248,7 +3250,7 @@ intel_hdmi_dsc_get_num_slices(const struct intel_crtc_state *crtc_state,
 	int max_throughput; /* max clock freq. in khz per slice */
 	int max_slice_width;
 	int slice_width;
-	int pixel_clock = crtc_state->hw.adjusted_mode.crtc_clock;
+	int pixel_clock = mode->crtc_clock;
 
 	if (!hdmi_throughput)
 		return 0;
@@ -3259,8 +3261,8 @@ intel_hdmi_dsc_get_num_slices(const struct intel_crtc_state *crtc_state,
 	 * for 4:4:4 is 1.0. Multiplying these factors by 10 and later
 	 * dividing adjusted clock value by 10.
 	 */
-	if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444 ||
-	    crtc_state->output_format == INTEL_OUTPUT_FORMAT_RGB)
+	if (output_format == INTEL_OUTPUT_FORMAT_YCBCR444 ||
+	    output_format == INTEL_OUTPUT_FORMAT_RGB)
 		kslice_adjust = 10;
 	else
 		kslice_adjust = 5;
@@ -3315,7 +3317,7 @@ intel_hdmi_dsc_get_num_slices(const struct intel_crtc_state *crtc_state,
 		else
 			return 0;
 
-		slice_width = DIV_ROUND_UP(crtc_state->hw.adjusted_mode.hdisplay, target_slices);
+		slice_width = DIV_ROUND_UP(mode->hdisplay, target_slices);
 		if (slice_width >= max_slice_width)
 			min_slices = target_slices + 1;
 	} while (slice_width >= max_slice_width);
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.h b/drivers/gpu/drm/i915/display/intel_hdmi.h
index fb950fdd0e7a..4e2228ca0c5b 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.h
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.h
@@ -13,6 +13,7 @@ enum intel_output_format;
 enum port;
 struct drm_connector;
 struct drm_connector_state;
+struct drm_display_mode;
 struct drm_encoder;
 struct intel_connector;
 struct intel_crtc_state;
@@ -56,7 +57,8 @@ int intel_hdmi_tmds_clock(int clock, int bpc, enum intel_output_format sink_form
 int intel_hdmi_dsc_get_bpp(int src_fractional_bpp, int slice_width,
 			   int num_slices, enum intel_output_format output_format,
 			   bool hdmi_all_bpp, int hdmi_max_chunk_bytes);
-int intel_hdmi_dsc_get_num_slices(const struct intel_crtc_state *crtc_state,
+int intel_hdmi_dsc_get_num_slices(const struct drm_display_mode *mode,
+				  enum intel_output_format output_format,
 				  int src_max_slices, int src_max_slice_width,
 				  int hdmi_max_slices, int hdmi_throughput);
 int intel_hdmi_dsc_get_slice_height(int vactive);
-- 
2.50.1