mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-02 15:18:19 +00:00
drm/i915/dp_mst: Make sure pbn_div is up-to-date after sink reconnect
Atm the MST encoder config computation may use an out-of-date pbn_div value, if the sink is unplugged and a sink is replugged with different link rate/lane count capabilities. The current way of reinitializing pbn_div depends on pbn_div getting cleared via intel_atomic_check() -> drm_dp_mst_atomic_check() -> drm_dp_mst_atomic_check_payload_alloc_limits(), however the clearing won't happen if the sink got unplugged (and hence drm_dp_mst_topology_mgr::mst_state being false). To fix the above, simply update pbn_div unconditionally during config computation, making pbn_div always match the link rate and lane count. Cc: Lyude Paul <lyude@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230929154929.343947-1-imre.deak@intel.com
This commit is contained in:
parent
cf37c0979e
commit
07f9cfe2ef
1 changed files with 3 additions and 6 deletions
|
@ -94,12 +94,9 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder,
|
|||
crtc_state->lane_count = limits->max_lane_count;
|
||||
crtc_state->port_clock = limits->max_rate;
|
||||
|
||||
// TODO: Handle pbn_div changes by adding a new MST helper
|
||||
if (!mst_state->pbn_div) {
|
||||
mst_state->pbn_div = drm_dp_get_vc_payload_bw(&intel_dp->mst_mgr,
|
||||
crtc_state->port_clock,
|
||||
crtc_state->lane_count);
|
||||
}
|
||||
mst_state->pbn_div = drm_dp_get_vc_payload_bw(&intel_dp->mst_mgr,
|
||||
crtc_state->port_clock,
|
||||
crtc_state->lane_count);
|
||||
|
||||
for (bpp = max_bpp; bpp >= min_bpp; bpp -= step) {
|
||||
drm_dbg_kms(&i915->drm, "Trying bpp %d\n", bpp);
|
||||
|
|
Loading…
Reference in a new issue