From dff442c97bcf07c6e1c0a9eff9bdfeac39824fa1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Wed, 4 May 2022 18:04:40 +0300
Subject: drm/i915: Respect VBT seamless DRRS min refresh rate
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Git-commit: 949665a6e237a6fd49ff207e3876d71b20b7e9f2
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Make sure our choice of downclock mode respects the VBT
seameless DRRS min refresh rate limit.
v2: s/vrefesh/vrefresh/ (Jani)
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220504150440.13748-10-ville.syrjala@linux.intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_panel.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 03398feb6676..d1d1b59102d6 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -75,13 +75,17 @@ const struct drm_display_mode *
intel_panel_downclock_mode(struct intel_connector *connector,
const struct drm_display_mode *adjusted_mode)
{
+ struct drm_i915_private *i915 = to_i915(connector->base.dev);
const struct drm_display_mode *fixed_mode, *best_mode = NULL;
- int vrefresh = drm_mode_vrefresh(adjusted_mode);
+ int min_vrefresh = i915->vbt.seamless_drrs_min_refresh_rate;
+ int max_vrefresh = drm_mode_vrefresh(adjusted_mode);
/* pick the fixed_mode with the lowest refresh rate */
list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
- if (drm_mode_vrefresh(fixed_mode) < vrefresh) {
- vrefresh = drm_mode_vrefresh(fixed_mode);
+ int vrefresh = drm_mode_vrefresh(fixed_mode);
+
+ if (vrefresh >= min_vrefresh && vrefresh < max_vrefresh) {
+ max_vrefresh = vrefresh;
best_mode = fixed_mode;
}
}
--
2.38.1