Patch "drm/mgag200: Set DDC timeout in milliseconds" has been added to the 5.4-stable tree

[gregkh at linuxfoundation.org]

This is a note to let you know that I've just added the patch titled

    drm/mgag200: Set DDC timeout in milliseconds

to the 5.4-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-mgag200-set-ddc-timeout-in-milliseconds.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.


>From ecde5db1598aecab54cc392282c15114f526f05f Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann at suse.de>
Date: Mon, 13 May 2024 14:51:06 +0200
Subject: drm/mgag200: Set DDC timeout in milliseconds

From: Thomas Zimmermann <tzimmermann at suse.de>

commit ecde5db1598aecab54cc392282c15114f526f05f upstream.

Compute the i2c timeout in jiffies from a value in milliseconds. The
original values of 2 jiffies equals 2 milliseconds if HZ has been
configured to a value of 1000. This corresponds to 2.2 milliseconds
used by most other DRM drivers. Update mgag200 accordingly.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe at redhat.com>
Fixes: 414c45310625 ("mgag200: initial g200se driver (v2)")
Cc: Dave Airlie <airlied at redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Jocelyn Falempe <jfalempe at redhat.com>
Cc: dri-devel at lists.freedesktop.org
Cc: <stable at vger.kernel.org> # v3.5+
Link: https://patchwork.freedesktop.org/patch/msgid/20240513125620.6337-2-tzimmermann@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 drivers/gpu/drm/mgag200/mgag200_i2c.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/mgag200/mgag200_i2c.c
+++ b/drivers/gpu/drm/mgag200/mgag200_i2c.c
@@ -135,7 +135,7 @@ struct mga_i2c_chan *mgag200_i2c_create(
 	i2c->adapter.algo_data = &i2c->bit;
 
 	i2c->bit.udelay = 10;
-	i2c->bit.timeout = 2;
+	i2c->bit.timeout = usecs_to_jiffies(2200);
 	i2c->bit.data = i2c;
 	i2c->bit.setsda		= mga_gpio_setsda;
 	i2c->bit.setscl		= mga_gpio_setscl;


Patches currently in stable-queue which might be from tzimmermann at suse.de are

queue-5.4/drm-client-fix-null-pointer-dereference-in-drm_client_modeset_probe.patch
queue-5.4/drm-mgag200-set-ddc-timeout-in-milliseconds.patch