[PATCH 08/23] drm/i915/dp: Account for AS_SDP guardband only when enabled

Ankit Nautiyal
2026-04-02T08:19:57Z

Currently the intel_dp_sdp_min_guardband() accounts for AS_SDP for all
platforms that support adaptive sync SDP even for configurations where
it cannot be enabled. Instead account for adaptive sync SDP guardband
only when it is enabled.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_dp.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 49eeb35973a1..499850c2abcf 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -7374,7 +7374,6 @@ int intel_dp_get_lines_for_sdp(const struct intel_crtc_state *crtc_state, u32 ty
int intel_dp_sdp_min_guardband(const struct intel_crtc_state *crtc_state,
bool assume_all_enabled)
{
- struct intel_display *display = to_intel_display(crtc_state);
int sdp_guardband = 0;

if (assume_all_enabled ||
@@ -7389,8 +7388,8 @@ int intel_dp_sdp_min_guardband(const struct intel_crtc_state *crtc_state,
sdp_guardband = max(sdp_guardband,
intel_dp_get_lines_for_sdp(crtc_state, DP_SDP_PPS));

- if ((assume_all_enabled && HAS_AS_SDP(display)) ||
- crtc_state->infoframes.enable & intel_hdmi_infoframe_enable(DP_SDP_ADAPTIVE_SYNC))
+ if (crtc_state->infoframes.enable &
+ intel_hdmi_infoframe_enable(DP_SDP_ADAPTIVE_SYNC))
sdp_guardband = max(sdp_guardband,
intel_dp_get_lines_for_sdp(crtc_state, DP_SDP_ADAPTIVE_SYNC));

--
2.45.2