This is a note to let you know that I've just added the patch titled
drm/i915/bios: Tolerate devdata==NULL in intel_bios_encoder_supports_dp_dual_mode()
to the 6.8-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-bios-tolerate-devdata-null-in-intel_bios_encoder_supports_dp_dual_mode.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 32e39bab59934bfd3f37097d4dd85ac5eb0fd549 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Tue, 19 Mar 2024 11:24:42 +0200
Subject: drm/i915/bios: Tolerate devdata==NULL in intel_bios_encoder_supports_dp_dual_mode()
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From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit 32e39bab59934bfd3f37097d4dd85ac5eb0fd549 upstream.
If we have no VBT, or the VBT didn't declare the encoder
in question, we won't have the 'devdata' for the encoder.
Instead of oopsing just bail early.
We won't be able to tell whether the port is DP++ or not,
but so be it.
Cc: stable@xxxxxxxxxxxxxxx
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10464
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240319092443.15769-1-ville.syrjala@xxxxxxxxxxxxxxx
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
(cherry picked from commit 26410896206342c8a80d2b027923e9ee7d33b733)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_bios.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -3344,6 +3344,9 @@ bool intel_bios_encoder_supports_dp_dual
{
const struct child_device_config *child = &devdata->child;
+ if (!devdata)
+ return false;
+
if (!intel_bios_encoder_supports_dp(devdata) ||
!intel_bios_encoder_supports_hdmi(devdata))
return false;
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-6.8/drm-i915-try-to-preserve-the-current-shared_dpll-for-fastset-on-type-c-ports.patch
queue-6.8/drm-i915-pre-populate-the-cursor-physical-dma-address.patch
queue-6.8/drm-i915-replace-a-memset-with-zero-initialization.patch
queue-6.8/drm-i915-add-missing-to-__assign_str-macros-in-trace.patch
queue-6.8/drm-i915-dsi-go-back-to-the-previous-init_otp-display_on-order-mostly.patch
queue-6.8/drm-i915-bios-tolerate-devdata-null-in-intel_bios_encoder_supports_dp_dual_mode.patch
queue-6.8/drm-i915-include-the-pll-name-in-the-debug-messages.patch
queue-6.8/drm-i915-suppress-old-pll-pipe_mask-checks-for-mg-tc-tbt-plls.patch
queue-6.8/drm-i915-dsb-fix-dsb-vblank-waits-when-using-vrr.patch
queue-6.8/drm-i915-vrr-generate-vrr-safe-window-for-dsb.patch
