From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> [ Upstream commit a5810f551d0a8c83b4817b53a446bd115e7182ce ] On some systems the panel reports alternate modes with different blanking periods. If the EDID reports them and VBT doesn't tell us otherwise then I can't really see why they should be rejected. So allow their use for the purposes of static DRRS. For seamless DRRS we still require a much more exact match of course. But that logic only kicks in when selecting the downclock mode (or in the future when determining whether we can do a seamless refresh rate change due to a user modeset). Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6374 Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20220830212436.2021-1-ville.syrjala@xxxxxxxxxxxxxxx Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx> Stable-dep-of: 12caf46cf4fc ("drm/i915/sdvo: Grab mode_config.mutex during LVDS init to avoid WARNs") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_panel.c | 25 ++++++---------------- 1 file changed, 6 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c index 237a40623dd7..cb44984bb9a2 100644 --- a/drivers/gpu/drm/i915/display/intel_panel.c +++ b/drivers/gpu/drm/i915/display/intel_panel.c @@ -81,15 +81,14 @@ static bool is_alt_drrs_mode(const struct drm_display_mode *mode, mode->clock != preferred_mode->clock; } -static bool is_alt_vrr_mode(const struct drm_display_mode *mode, - const struct drm_display_mode *preferred_mode) +static bool is_alt_fixed_mode(const struct drm_display_mode *mode, + const struct drm_display_mode *preferred_mode) { return drm_mode_match(mode, preferred_mode, DRM_MODE_MATCH_FLAGS | DRM_MODE_MATCH_3D_FLAGS) && mode->hdisplay == preferred_mode->hdisplay && - mode->vdisplay == preferred_mode->vdisplay && - mode->clock != preferred_mode->clock; + mode->vdisplay == preferred_mode->vdisplay; } const struct drm_display_mode * @@ -172,19 +171,7 @@ int intel_panel_compute_config(struct intel_connector *connector, return 0; } -static bool is_alt_fixed_mode(const struct drm_display_mode *mode, - const struct drm_display_mode *preferred_mode, - bool has_vrr) -{ - /* is_alt_drrs_mode() is a subset of is_alt_vrr_mode() */ - if (has_vrr) - return is_alt_vrr_mode(mode, preferred_mode); - else - return is_alt_drrs_mode(mode, preferred_mode); -} - -static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connector, - bool has_vrr) +static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); const struct drm_display_mode *preferred_mode = @@ -192,7 +179,7 @@ static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connect struct drm_display_mode *mode, *next; list_for_each_entry_safe(mode, next, &connector->base.probed_modes, head) { - if (!is_alt_fixed_mode(mode, preferred_mode, has_vrr)) + if (!is_alt_fixed_mode(mode, preferred_mode)) continue; drm_dbg_kms(&dev_priv->drm, @@ -255,7 +242,7 @@ void intel_panel_add_edid_fixed_modes(struct intel_connector *connector, { intel_panel_add_edid_preferred_mode(connector); if (intel_panel_preferred_fixed_mode(connector) && (has_drrs || has_vrr)) - intel_panel_add_edid_alt_fixed_modes(connector, has_vrr); + intel_panel_add_edid_alt_fixed_modes(connector); intel_panel_destroy_probed_modes(connector); } -- 2.35.1
