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drm/i915: Respect VBT seamless DRRS min refresh rate 

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
This commit is contained in:
Ville Syrjälä 2022-05-04 18:04:40 +03:00
parent 790b45f1bc
commit 949665a6e2
1 changed files with 7 additions and 3 deletions
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10
drivers/gpu/drm/i915/display/intel_panel.c
View File

@ -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;
}
}