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 <navaremanasi@xxxxxxxxxxxx>
Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
---
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
