diff options
| author | Ankit Nautiyal <ankit.k.nautiyal@intel.com> | 2026-05-11 15:32:15 +0300 |
|---|---|---|
| committer | Ankit Nautiyal <ankit.k.nautiyal@intel.com> | 2026-05-18 05:43:51 +0300 |
| commit | f7abc4af2b19240a145a221461dfe756cc01d74a (patch) | |
| tree | e293a10e518485f171e5781eafb57e6d003deb70 | |
| parent | bbba23373bcca2133d945fbb8893c8cb1d377365 (diff) | |
| download | linux-f7abc4af2b19240a145a221461dfe756cc01d74a.tar.xz | |
drm/i915/dp: Fix readback for target_rr in Adaptive Sync SDP
Correct the bit-shift logic to properly readback the 10 bit target_rr from
DB3 and DB4.
v2: Align the style with readback for vtotal. (Ville)
Fixes: 12ea89291603 ("drm/i915/dp: Add Read/Write support for Adaptive Sync SDP")
Cc: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260511123218.1589830-2-ankit.k.nautiyal@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 61ccaf0a46b6..f01a6eed3839 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -5376,7 +5376,7 @@ int intel_dp_as_sdp_unpack(struct drm_dp_as_sdp *as_sdp, as_sdp->length = sdp->sdp_header.HB3 & DP_AS_SDP_LENGTH_MASK; as_sdp->mode = sdp->db[0] & DP_AS_SDP_OPERATION_MODE_MASK; as_sdp->vtotal = (sdp->db[2] << 8) | sdp->db[1]; - as_sdp->target_rr = (u64)sdp->db[3] | ((u64)sdp->db[4] & 0x3); + as_sdp->target_rr = ((sdp->db[4] & 0x3) << 8) | sdp->db[3]; as_sdp->target_rr_divider = sdp->db[4] & 0x20 ? true : false; return 0; |