From: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org
Cc: ville.syrjala@linux.intel.com, jani.nikula@linux.intel.com,
navaremanasi@google.com,
Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Subject: [PATCH 2/6] drm/i915/panel: Preserve Vtotal-Vsync distance while adjusting vtotal
Date: Tue, 12 May 2026 19:02:45 +0530 [thread overview]
Message-ID: <20260512133249.2475882-3-ankit.k.nautiyal@intel.com> (raw)
In-Reply-To: <20260512133249.2475882-1-ankit.k.nautiyal@intel.com>
As we increase the vtotal to accomodate lower resfresh rate for fixed
modes, adjust the vtotal-vsync distance also.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
drivers/gpu/drm/i915/display/intel_panel.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 20c548eea6da..14c7eea8ccb1 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -237,11 +237,18 @@ int intel_panel_compute_config(struct intel_connector *connector,
drm_mode_copy(adjusted_mode, fixed_mode);
- if (is_vrr && fixed_mode_vrefresh != vrefresh)
+ if (is_vrr && fixed_mode_vrefresh != vrefresh) {
+ int vsync_start_diff = adjusted_mode->vtotal - adjusted_mode->vsync_start;
+ int vsync_end_diff = adjusted_mode->vtotal - adjusted_mode->vsync_end;
+
adjusted_mode->vtotal =
DIV_ROUND_CLOSEST(adjusted_mode->clock * 1000,
adjusted_mode->htotal * vrefresh);
+ adjusted_mode->vsync_start = adjusted_mode->vtotal - vsync_start_diff;
+ adjusted_mode->vsync_end = adjusted_mode->vtotal - vsync_end_diff;
+ }
+
drm_mode_set_crtcinfo(adjusted_mode, 0);
return 0;
--
2.45.2
next prev parent reply other threads:[~2026-05-12 13:47 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-12 13:32 [PATCH 0/6] drm/i915/intel_panel: Fix seamless VRR mode switching for DRRS panels Ankit Nautiyal
2026-05-12 13:32 ` [PATCH 1/6] drm/i915/display: Deprecate TRANS_VSYNC where VRR TG is always on Ankit Nautiyal
2026-05-19 14:56 ` Ville Syrjälä
2026-05-12 13:32 ` Ankit Nautiyal [this message]
2026-05-12 13:32 ` [PATCH 3/6] drm/i915/intel_panel: Add a helper to get the highest refresh rate mode Ankit Nautiyal
2026-05-12 13:32 ` [PATCH 4/6] drm/i915/intel_panel: Pass crtc_state to intel_panel_compute_config Ankit Nautiyal
2026-05-12 13:32 ` [PATCH 5/6] drm/i915/intel_panel: Use highest refresh rate mode for VRR panels Ankit Nautiyal
2026-05-12 13:32 ` [PATCH 6/6] drm/i915/intel_panel: Refine VRR fixed mode selection for DRRS panels Ankit Nautiyal
2026-05-12 22:21 ` ✗ CI.checkpatch: warning for drm/i915/intel_panel: Fix seamless VRR mode switching for DRRS panels (rev2) Patchwork
2026-05-12 22:22 ` ✓ CI.KUnit: success " Patchwork
2026-05-12 23:43 ` ✓ Xe.CI.BAT: " Patchwork
2026-05-13 16:21 ` ✗ Xe.CI.FULL: failure " Patchwork
-- strict thread matches above, loose matches on Subject: below --
2026-05-22 13:25 [PATCH 0/6] drm/i915/intel_panel: Fix seamless VRR mode switching for DRRS panels Ankit Nautiyal
2026-05-22 13:25 ` [PATCH 2/6] drm/i915/panel: Preserve Vtotal-Vsync distance while adjusting vtotal Ankit Nautiyal
2026-06-03 12:14 ` Ville Syrjälä
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