We need bigjoiner support with MST functionality for MST monitor resolutions > 5K to work. Adding support for the same.
v2: Addressed review comments from Jani. Revert rejection of MST bigjoiner modes and add functionality v3: Fixed pipe_mismatch WARN for mst_master_transcoder Credits-to: Manasi Navare <[email protected]> Signed-off-by: Vidya Srinivas <[email protected]> --- drivers/gpu/drm/i915/display/intel_ddi.c | 6 ++++-- drivers/gpu/drm/i915/display/intel_dp_mst.c | 17 +++++++++-------- 2 files changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index c587a8efeafc..41998022ed07 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -3902,9 +3902,11 @@ static void intel_ddi_read_func_ctl(struct intel_encoder *encoder, pipe_config->lane_count = ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1; - if (DISPLAY_VER(dev_priv) >= 12) - pipe_config->mst_master_transcoder = + if (DISPLAY_VER(dev_priv) >= 12) { + if (!intel_crtc_is_bigjoiner_slave(pipe_config)) + pipe_config->mst_master_transcoder = REG_FIELD_GET(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, temp); + } intel_cpu_transcoder_get_m1_n1(crtc, cpu_transcoder, &pipe_config->dp_m_n); diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index db1254b036f1..c5e7293c13eb 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -525,6 +525,7 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder, { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_atomic_state *state = to_intel_atomic_state(conn_state->state); + struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder); struct intel_dp *intel_dp = &intel_mst->primary->dp; const struct intel_connector *connector = @@ -542,6 +543,10 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder, if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) return -EINVAL; + if (intel_dp_need_bigjoiner(intel_dp, adjusted_mode->crtc_hdisplay, + adjusted_mode->crtc_clock)) + pipe_config->bigjoiner_pipes = GENMASK(crtc->pipe + 1, crtc->pipe); + pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB; pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; pipe_config->has_pch_encoder = false; @@ -1330,12 +1335,6 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector, * corresponding link capabilities of the sink) in case the * stream is uncompressed for it by the last branch device. */ - if (mode_rate > max_rate || mode->clock > max_dotclk || - drm_dp_calc_pbn_mode(mode->clock, min_bpp << 4) > port->full_pbn) { - *status = MODE_CLOCK_HIGH; - return 0; - } - if (mode->clock < 10000) { *status = MODE_CLOCK_LOW; return 0; @@ -1349,8 +1348,10 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector, if (intel_dp_need_bigjoiner(intel_dp, mode->hdisplay, target_clock)) { bigjoiner = true; max_dotclk *= 2; + } - /* TODO: add support for bigjoiner */ + if (mode_rate > max_rate || mode->clock > max_dotclk || + drm_dp_calc_pbn_mode(mode->clock, min_bpp << 4) > port->full_pbn) { *status = MODE_CLOCK_HIGH; return 0; } @@ -1397,7 +1398,7 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector, return 0; } - *status = intel_mode_valid_max_plane_size(dev_priv, mode, false); + *status = intel_mode_valid_max_plane_size(dev_priv, mode, bigjoiner); return 0; } -- 2.33.0
