Pull the code to get joiner constraints on maximum compressed bpp into
separate function.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp.c | 54 ++++++++++++++-----------
1 file changed, 30 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 109d7756ede4..3ccdf765c1f0 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -740,6 +740,32 @@ u32 intel_dp_dsc_nearest_valid_bpp(struct drm_i915_private *i915, u32 bpp, u32 p
return bits_per_pixel;
}
+static
+u32 get_max_compressed_bpp_with_joiner(struct drm_i915_private *i915,
+ u32 mode_clock, u32 mode_hdisplay,
+ bool bigjoiner)
+{
+ u32 max_bpp_small_joiner_ram;
+
+ /* Small Joiner Check: output bpp <= joiner RAM (bits) / Horiz. width */
+ max_bpp_small_joiner_ram = small_joiner_ram_size_bits(i915) / mode_hdisplay;
+
+ if (bigjoiner) {
+ int bigjoiner_interface_bits = DISPLAY_VER(i915) >= 14 ? 36 : 24;
+ /* With bigjoiner multiple dsc engines are used in parallel so PPC is 2 */
+ int ppc = 2;
+ u32 max_bpp_bigjoiner =
+ i915->display.cdclk.max_cdclk_freq * ppc * bigjoiner_interface_bits /
+ intel_dp_mode_to_fec_clock(mode_clock);
+
+ max_bpp_small_joiner_ram *= 2;
+
+ return min(max_bpp_small_joiner_ram, max_bpp_bigjoiner);
+ }
+
+ return max_bpp_small_joiner_ram;
+}
+
u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
u32 link_clock, u32 lane_count,
u32 mode_clock, u32 mode_hdisplay,
@@ -748,7 +774,7 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
u32 pipe_bpp,
u32 timeslots)
{
- u32 bits_per_pixel, max_bpp_small_joiner_ram;
+ u32 bits_per_pixel, joiner_max_bpp;
/*
* Available Link Bandwidth(Kbits/sec) = (NumberOfLanes)*
@@ -788,29 +814,9 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
(link_clock * lane_count * 8),
intel_dp_mode_to_fec_clock(mode_clock));
- /* Small Joiner Check: output bpp <= joiner RAM (bits) / Horiz. width */
- max_bpp_small_joiner_ram = small_joiner_ram_size_bits(i915) /
- mode_hdisplay;
-
- if (bigjoiner)
- max_bpp_small_joiner_ram *= 2;
-
- /*
- * Greatest allowed DSC BPP = MIN (output BPP from available Link BW
- * check, output bpp from small joiner RAM check)
- */
- bits_per_pixel = min(bits_per_pixel, max_bpp_small_joiner_ram);
-
- if (bigjoiner) {
- int bigjoiner_interface_bits = DISPLAY_VER(i915) >= 14 ? 36 : 24;
- /* With bigjoiner multiple dsc engines are used in parallel so PPC is 2 */
- int ppc = 2;
- u32 max_bpp_bigjoiner =
- i915->display.cdclk.max_cdclk_freq * ppc * bigjoiner_interface_bits /
- intel_dp_mode_to_fec_clock(mode_clock);
-
- bits_per_pixel = min(bits_per_pixel, max_bpp_bigjoiner);
- }
+ joiner_max_bpp = get_max_compressed_bpp_with_joiner(i915, mode_clock,
+ mode_hdisplay, bigjoiner);
+ bits_per_pixel = min(bits_per_pixel, joiner_max_bpp);
bits_per_pixel = intel_dp_dsc_nearest_valid_bpp(i915, bits_per_pixel, pipe_bpp);
--
2.40.1
