Re: [PATCH] ACPI: video: use ACPI backlight for HP 635 Notebook

[Greg KH <gregkh@linuxfoundation.org>]

On Fri, Sep 11, 2020 at 04:14:20PM -0600, Alex Hung wrote:
> Default backlight interface is AMD's radeon_bl0 which does not work on
> this system. As a result, let's for ACPI backlight interface for this
> system.
> 
> BugLink: https://bugs.launchpad.net/bugs/1894667
> 
> Cc: All applicable <stable@vger.kernel.org>
> Signed-off-by: Alex Hung <alex.hung@canonical.com>
> ---
>  drivers/acpi/video_detect.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
> index 2499d7e..05047a3 100644
> --- a/drivers/acpi/video_detect.c
> +++ b/drivers/acpi/video_detect.c
> @@ -282,6 +282,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
>  		DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
>  		},
>  	},
> +	/* https://bugs.launchpad.net/bugs/1894667 */
> +	{
> +	 .callback = video_detect_force_video,
> +	 .ident = "HP 635 Notebook",
> +	 .matches = {
> +		DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
> +		DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"),
> +		},
> +	},
>  
>  	/* Non win8 machines which need native backlight nevertheless */
>  	{
> -- 
> 2.7.4
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>