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drm/i915: Allow an arbitrary number of downclock modes

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Remove the "two fixed modes only" limit and grab as many
downclock modes from the EDID as we can find.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220331112822.11462-8-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä
2022-03-31 14:28:18 +03:00
parent ccaa910128
commit 7634bef123
1 changed files with 13 additions and 31 deletions
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44
drivers/gpu/drm/i915/display/intel_panel.c
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@@ -159,42 +159,24 @@ static bool is_downclock_mode(const struct drm_display_mode *downclock_mode,
downclock_mode->clock < fixed_mode->clock;
}
static void intel_panel_add_edid_downclock_mode(struct intel_connector *connector)
static void intel_panel_add_edid_downclock_modes(struct intel_connector *connector)
{
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
const struct drm_display_mode *fixed_mode =
intel_panel_preferred_fixed_mode(connector);
struct drm_display_mode *scan, *best_mode = NULL;
int best_clock = fixed_mode->clock;
struct drm_display_mode *mode, *next;
list_for_each_entry(scan, &connector->base.probed_modes, head) {
/*
* If one mode has the same resolution with the fixed_panel
* mode while they have the different refresh rate, it means
* that the reduced downclock is found. In such
* case we can set the different FPx0/1 to dynamically select
* between low and high frequency.
*/
if (is_downclock_mode(scan, fixed_mode) &&
scan->clock < best_clock) {
/*
* The downclock is already found. But we
* expect to find the lower downclock.
*/
best_clock = scan->clock;
best_mode = scan;
}
list_for_each_entry_safe(mode, next, &connector->base.probed_modes, head) {
if (!is_downclock_mode(mode, fixed_mode))
continue;
drm_dbg_kms(&dev_priv->drm,
"[CONNECTOR:%d:%s] using EDID downclock mode: " DRM_MODE_FMT "\n",
connector->base.base.id, connector->base.name,
DRM_MODE_ARG(mode));
list_move_tail(&mode->head, &connector->panel.fixed_modes);
}
if (!best_mode)
return;
drm_dbg_kms(&dev_priv->drm,
"[CONNECTOR:%d:%s] using EDID downclock mode: " DRM_MODE_FMT "\n",
connector->base.base.id, connector->base.name,
DRM_MODE_ARG(best_mode));
list_move_tail(&best_mode->head, &connector->panel.fixed_modes);
}
static void intel_panel_add_edid_fixed_mode(struct intel_connector *connector)
@@ -243,7 +225,7 @@ void intel_panel_add_edid_fixed_modes(struct intel_connector *connector, bool ha
{
intel_panel_add_edid_fixed_mode(connector);
if (intel_panel_preferred_fixed_mode(connector) && has_drrs)
intel_panel_add_edid_downclock_mode(connector);
intel_panel_add_edid_downclock_modes(connector);
intel_panel_destroy_probed_modes(connector);
}