Similar to the DP SST, refactor `mst_stream_compute_config()` to iterate over joiner candidates and select the minimal joiner configuration that satisfies the mode requirements. This prepares the logic for future changes that will consider DSC slice overhead.
Signed-off-by: Ankit Nautiyal <[email protected]> --- drivers/gpu/drm/i915/display/intel_dp_mst.c | 47 +++++++++++++++++---- 1 file changed, 38 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 29ac7b2e1e9c..7a83af89ef03 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -687,6 +687,7 @@ static int mst_stream_compute_config(struct intel_encoder *encoder, const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; int num_joined_pipes; + int num_pipes; int ret = 0; if (pipe_config->fec_enable && @@ -700,17 +701,45 @@ static int mst_stream_compute_config(struct intel_encoder *encoder, pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; pipe_config->has_pch_encoder = false; - num_joined_pipes = intel_dp_num_joined_pipes(intel_dp, connector, - adjusted_mode->crtc_hdisplay, - adjusted_mode->crtc_clock); + for (num_pipes = 0; num_pipes < I915_MAX_PIPES; num_pipes++) { + int max_dotclk = display->cdclk.max_dotclk_freq; - if (num_joined_pipes > 1) - pipe_config->joiner_pipes = GENMASK(crtc->pipe + num_joined_pipes - 1, crtc->pipe); + ret = -EINVAL; + + if (num_pipes == 0) { + if (!connector->force_joined_pipes) + continue; + num_joined_pipes = connector->force_joined_pipes; + } else { + num_joined_pipes = num_pipes; + } + + if (!intel_dp_can_join(display, num_joined_pipes)) + continue; + + if (adjusted_mode->hdisplay > + num_joined_pipes * intel_dp_max_hdisplay_per_pipe(display)) + continue; + + if (num_joined_pipes > 1) + pipe_config->joiner_pipes = GENMASK(crtc->pipe + num_joined_pipes - 1, + crtc->pipe); + + ret = mst_stream_compute_link_for_joined_pipes(encoder, + pipe_config, + conn_state, + num_joined_pipes); + if (ret) + continue; + + max_dotclk *= num_joined_pipes; + + if (adjusted_mode->clock <= max_dotclk) { + ret = 0; + break; + } + } - ret = mst_stream_compute_link_for_joined_pipes(encoder, - pipe_config, - conn_state, - num_joined_pipes); if (ret) return ret; -- 2.45.2
