From 7634bef123bcf42e64acb694d545ba93b79d5b5b Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 31 Mar 2022 14:28:18 +0300 Subject: [PATCH] drm/i915: Allow an arbitrary number of downclock modes MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Link: https://patchwork.freedesktop.org/patch/msgid/20220331112822.11462-8-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_panel.c | 42 +++++++++--------------------- 1 file changed, 12 insertions(+), 30 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 5d08b2b..d359c80 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -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; - - 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; - } - } + struct drm_display_mode *mode, *next; - if (!best_mode) - return; + 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(best_mode)); + 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(&best_mode->head, &connector->panel.fixed_modes); + list_move_tail(&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); } -- 2.7.4