Re: [PATCH v9 5/8] drm/i915/display: Add support for pack and unpack

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On 5/24/2024 3:54 PM, Mitul Golani wrote:
Add support of pack and unpack for target_rr_divider.

--v2:
- Set Target Refresh Rate Divider bit when related
AS SDP bit is set (Ankit).

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx>
---
  drivers/gpu/drm/i915/display/intel_dp.c | 4 ++++
  1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index c0a3b6d50681..15aab14c4206 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4230,6 +4230,9 @@ static ssize_t intel_dp_as_sdp_pack(const struct drm_dp_as_sdp *as_sdp,
  	sdp->db[3] = as_sdp->target_rr & 0xFF;
  	sdp->db[4] = (as_sdp->target_rr >> 8) & 0x3;
+ if (as_sdp->target_rr_divider)
+		sdp->db[4] |= 0x20;
+
  	return length;
  }
@@ -4410,6 +4413,7 @@ int intel_dp_as_sdp_unpack(struct drm_dp_as_sdp *as_sdp,
  	as_sdp->mode = sdp->db[0] & DP_ADAPTIVE_SYNC_SDP_OPERATION_MODE;
  	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_divider = sdp->db[4] & 0x20;

Missed to point this last time: target_rr_divider is a bool so perhaps:

as_sdp->target_rr_divider = sdp->db[4] & 0x20 ? true : false

Regards,

Ankit

return 0;
  }



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