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drm/i915/dp: Factor out compute_max_compressed_bpp_x16()

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

Reviewed-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251222153547.713360-12-imre.deak@intel.com
This commit is contained in:
Imre Deak 2025-12-22 17:35:38 +02:00
parent 28e59c7e24
commit e68aecf473
1 changed files with 49 additions and 33 deletions
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82
drivers/gpu/drm/i915/display/intel_dp.c
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@ -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.
@ -2692,43 +2734,17 @@ 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,
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,
crtc_state->output_format,
limits->pipe.max_bpp,
max_link_bpp_x16);
compute_max_compressed_bpp_x16(connector,
adjusted_mode->crtc_clock,
adjusted_mode->hdisplay,
intel_crtc_num_joined_pipes(crtc_state),
crtc_state->output_format,
limits->pipe.max_bpp,
max_link_bpp_x16);
}
limits->link.max_bpp_x16 = max_link_bpp_x16;