Commit d9f864ef authored by Ankit Nautiyal's avatar Ankit Nautiyal
Browse files

drm/i915/dp: Update Bigjoiner interface bits for computing compressed bpp 



In Bigjoiner check for DSC, bigjoiner interface bits for DP for
DISPLAY > 13 is 36 (Bspec: 49259).

v2: Corrected Display ver to 13.

v3: Follow convention for conditional statement. (Ville)

v4: Fix check for display ver. (Ville)

v5: Added note for 2 PPC. (Stan)

Signed-off-by: default avatarAnkit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarStanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230817142459.89764-6-ankit.k.nautiyal@intel.com
parent 8d528476

drivers/gpu/drm/i915/display/intel_dp.c

+4 −1
Original line number Diff line number Diff line
@@ -802,8 +802,11 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915, 
	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 * 48 /

			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);