This is a note to let you know that I've just added the patch titled
drm/i915: Allow more varied alternate fixed modes for panels
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-allow-more-varied-alternate-fixed-modes-for.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7fc210e520b99119e6305ec1e4fcd3c034b51cd0
Author: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Wed Aug 31 00:24:36 2022 +0300
drm/i915: Allow more varied alternate fixed modes for panels
[ 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>
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);
}
