From 74d6f31fa427b87616bc65987a8aff460da1e670 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Wed, 7 Sep 2022 12:10:54 +0300 Subject: [PATCH] drm/i915: Add intel_panel_highest_mode() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a function to get the fixed_mode with the highest clock. The plan is to use this for the link bw calculation on seamless DRRS panels so that we alwasy end up with the same link params regardless of the requested refresh rate. This will allow fastset to do seamless refresh rate changes based on userspace request instead of having to go for a full modeset. TODO: the function name isn't great Reviewed-by: Jani Nikula Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220907091057.11572-15-ville.syrjala@linux.intel.com --- drivers/gpu/drm/i915/display/intel_panel.c | 15 +++++++++++++++ drivers/gpu/drm/i915/display/intel_panel.h | 3 +++ 2 files changed, 18 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index d27a220def00..a3a3f9fe4342 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -114,6 +114,21 @@ intel_panel_downclock_mode(struct intel_connector *connector, return best_mode; } +const struct drm_display_mode * +intel_panel_highest_mode(struct intel_connector *connector, + const struct drm_display_mode *adjusted_mode) +{ + const struct drm_display_mode *fixed_mode, *best_mode = adjusted_mode; + + /* pick the fixed_mode that has the highest clock */ + list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) { + if (fixed_mode->clock > best_mode->clock) + best_mode = fixed_mode; + } + + return best_mode; +} + int intel_panel_get_modes(struct intel_connector *connector) { const struct drm_display_mode *fixed_mode; diff --git a/drivers/gpu/drm/i915/display/intel_panel.h b/drivers/gpu/drm/i915/display/intel_panel.h index b087c0c3cc6d..eff3ffd3d082 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.h +++ b/drivers/gpu/drm/i915/display/intel_panel.h @@ -31,6 +31,9 @@ intel_panel_fixed_mode(struct intel_connector *connector, const struct drm_display_mode * intel_panel_downclock_mode(struct intel_connector *connector, const struct drm_display_mode *adjusted_mode); +const struct drm_display_mode * +intel_panel_highest_mode(struct intel_connector *connector, + const struct drm_display_mode *adjusted_mode); int intel_panel_get_modes(struct intel_connector *connector); enum drrs_type intel_panel_drrs_type(struct intel_connector *connector); enum drm_mode_status