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drm/mst: use DP_GET_SINK_COUNT() for sink count in ESI

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Take bit 7 into account when reading sink count from
DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220104184857.784563-2-jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2022-01-04 20:48:57 +02:00
parent 55a9c00021
commit f199f71f20
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_dp_mst_topology.c
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@ -4196,7 +4196,7 @@ int drm_dp_mst_hpd_irq(struct drm_dp_mst_topology_mgr *mgr, u8 *esi, bool *handl
int ret = 0;
int sc;
*handled = false;
sc = esi[0] & 0x3f;
sc = DP_GET_SINK_COUNT(esi[0]);
if (sc != mgr->sink_count) {
mgr->sink_count = sc;