Commit e68aecf4 authored by Imre Deak's avatar Imre Deak
Browse files

drm/i915/dp: Factor out compute_max_compressed_bpp_x16() 



Factor out compute_max_compressed_bpp_x16() also used during mode
validation in a follow-up change.

Reviewed-by: default avatarVinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: default avatarImre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251222153547.713360-12-imre.deak@intel.com
parent 28e59c7e

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

+49 −33
Original line number Diff line number Diff line
@@ -2663,6 +2663,48 @@ static int compute_min_compressed_bpp_x16(struct intel_connector *connector, 
	return min_bpp_x16;

}



static int compute_max_compressed_bpp_x16(struct intel_connector *connector,

					  int mode_clock, int mode_hdisplay,

					  int num_joined_pipes,

					  enum intel_output_format output_format,

					  int pipe_max_bpp, int max_link_bpp_x16)

{

	struct intel_display *display = to_intel_display(connector);

	struct intel_dp *intel_dp = intel_attached_dp(connector);

	int dsc_src_max_bpp, dsc_sink_max_bpp, dsc_max_bpp;

	int throughput_max_bpp_x16;

	int joiner_max_bpp;



	dsc_src_max_bpp = dsc_src_max_compressed_bpp(intel_dp);

	joiner_max_bpp = get_max_compressed_bpp_with_joiner(display,

							    mode_clock,

							    mode_hdisplay,

							    num_joined_pipes);

	dsc_sink_max_bpp = intel_dp_dsc_sink_max_compressed_bpp(connector,

								output_format,

								pipe_max_bpp / 3);

	dsc_max_bpp = min(dsc_sink_max_bpp, dsc_src_max_bpp);

	dsc_max_bpp = min(dsc_max_bpp, joiner_max_bpp);



	max_link_bpp_x16 = min(max_link_bpp_x16, fxp_q4_from_int(dsc_max_bpp));



	throughput_max_bpp_x16 = dsc_throughput_quirk_max_bpp_x16(connector,

								  mode_clock);

	if (throughput_max_bpp_x16 < max_link_bpp_x16) {

		max_link_bpp_x16 = throughput_max_bpp_x16;



		drm_dbg_kms(display->drm,

			    "[CONNECTOR:%d:%s] Decreasing link max bpp to " FXP_Q4_FMT " due to DSC throughput quirk\n",

			    connector->base.base.id, connector->base.name,

			    FXP_Q4_ARGS(max_link_bpp_x16));

	}



	max_link_bpp_x16 = align_max_compressed_bpp_x16(connector, output_format,

							pipe_max_bpp, max_link_bpp_x16);



	return max_link_bpp_x16;

}



/*

 * Calculate the output link min, max bpp values in limits based on the pipe bpp

 * range, crtc_state and dsc mode. Return true on success.
@@ -2692,40 +2734,14 @@ intel_dp_compute_config_link_bpp_limits(struct intel_connector *connector, 


		limits->link.min_bpp_x16 = fxp_q4_from_int(limits->pipe.min_bpp);

	} else {

		int dsc_src_max_bpp, dsc_sink_max_bpp, dsc_max_bpp;

		int throughput_max_bpp_x16;

		int joiner_max_bpp;

		limits->link.min_bpp_x16 =

			compute_min_compressed_bpp_x16(connector, crtc_state->output_format);



		dsc_src_max_bpp = dsc_src_max_compressed_bpp(intel_dp);

		joiner_max_bpp =

			get_max_compressed_bpp_with_joiner(display,

		max_link_bpp_x16 =

			compute_max_compressed_bpp_x16(connector,

						       adjusted_mode->crtc_clock,

						       adjusted_mode->hdisplay,

							   intel_crtc_num_joined_pipes(crtc_state));

		dsc_sink_max_bpp = intel_dp_dsc_sink_max_compressed_bpp(connector,

									crtc_state->output_format,

									limits->pipe.max_bpp / 3);

		dsc_max_bpp = min(dsc_sink_max_bpp, dsc_src_max_bpp);

		dsc_max_bpp = min(dsc_max_bpp, joiner_max_bpp);



		max_link_bpp_x16 = min(max_link_bpp_x16, fxp_q4_from_int(dsc_max_bpp));



		throughput_max_bpp_x16 =

			dsc_throughput_quirk_max_bpp_x16(connector, adjusted_mode->crtc_clock);

		if (throughput_max_bpp_x16 < max_link_bpp_x16) {

			max_link_bpp_x16 = throughput_max_bpp_x16;



			drm_dbg_kms(display->drm,

				    "[CRTC:%d:%s][CONNECTOR:%d:%s] Decreasing link max bpp to " FXP_Q4_FMT " due to DSC throughput quirk\n",

				    crtc->base.base.id, crtc->base.name,

				    connector->base.base.id, connector->base.name,

				    FXP_Q4_ARGS(max_link_bpp_x16));

		}



		max_link_bpp_x16 =

			align_max_compressed_bpp_x16(connector,

						       intel_crtc_num_joined_pipes(crtc_state),

						       crtc_state->output_format,

						       limits->pipe.max_bpp,

						       max_link_bpp_x16);