The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
Possible dependencies:
a3cd4f447281 ("drm/i915/sdvo: Grab mode_config.mutex during LVDS init to avoid WARNs")
eb89e83c152b ("drm/i915: Simplify intel_panel_add_edid_alt_fixed_modes()")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From a3cd4f447281c56377de2ee109327400eb00668d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Wed, 26 Oct 2022 13:11:29 +0300
Subject: [PATCH] drm/i915/sdvo: Grab mode_config.mutex during LVDS init to
avoid WARNs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
drm_mode_probed_add() is unhappy about being called w/o
mode_config.mutex. Grab it during LVDS fixed mode setup
to silence the WARNs.
Cc: stable@xxxxxxxxxxxxxxx
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/7301
Fixes: aa2b88074a56 ("drm/i915/sdvo: Fix multi function encoder stuff")
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20221026101134.20865-4-ville.syrjala@xxxxxxxxxxxxxxx
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c
index e62f41354789..9b447708d8e8 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -2908,8 +2908,12 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
intel_panel_add_vbt_sdvo_fixed_mode(intel_connector);
if (!intel_panel_preferred_fixed_mode(intel_connector)) {
+ mutex_lock(&i915->drm.mode_config.mutex);
+
intel_ddc_get_modes(connector, &intel_sdvo->ddc);
intel_panel_add_edid_fixed_modes(intel_connector, false);
+
+ mutex_unlock(&i915->drm.mode_config.mutex);
}
intel_panel_init(intel_connector);
