Re: [PATCH] ACPI / Video: blacklist some samsung laptops

[Corentin Chary]

On Tue, Jan 17, 2012 at 8:08 AM, Corentin Chary <corentincj@xxxxxxxxxx> wrote:
> On these laptops, the ACPI video is not functional, and very unlikely
> to be fixed by the vendor. Note that intel_backlight works for some
> of these laptops, and the backlight from samsung-laptop always work.
>
> The good news is that newer laptops have functional ACPI video device
> and won't end up growing this list.
>
> Signed-off-by: Corentin Chary <corentincj@xxxxxxxxxx>
> ---
> Âdrivers/acpi/video_detect.c | Â 49 +++++++++++++++++++++++++++++++++++++++++++
> Â1 files changed, 49 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
> index 45d8097..66be45e 100644
> --- a/drivers/acpi/video_detect.c
> +++ b/drivers/acpi/video_detect.c
> @@ -132,6 +132,53 @@ find_video(acpi_handle handle, u32 lvl, void *context, void **rv)
> Â Â Â Âreturn AE_OK;
> Â}
>
> +/* Force to use vendor driver when the ACPI device is known to be
> + * buggy */
> +static int video_detect_force_vendor(const struct dmi_system_id *d)
> +{
> + Â Â Â acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
> + Â Â Â return 0;
> +}
> +
> +static struct dmi_system_id video_detect_dmi_table[] = {
> + Â Â Â {
> + Â Â Â Â.callback = video_detect_force_vendor,
> + Â Â Â Â.ident = "N150P",
> + Â Â Â Â.matches = {
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_BOARD_NAME, "N150P"),
> + Â Â Â Â Â Â Â },
> + Â Â Â },
> + Â Â Â {
> + Â Â Â Â.callback = video_detect_force_vendor,
> + Â Â Â Â.ident = "N145P/N250P/N260P",
> + Â Â Â Â.matches = {
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
> + Â Â Â Â Â Â Â },
> + Â Â Â },
> + Â Â Â {
> + Â Â Â Â.callback = video_detect_force_vendor,
> + Â Â Â Â.ident = "N150/N210/N220",
> + Â Â Â Â.matches = {
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
> + Â Â Â Â Â Â Â },
> + Â Â Â },
> + Â Â Â {
> + Â Â Â Â.callback = video_detect_force_vendor,
> + Â Â Â Â.ident = "NF110/NF210/NF310",
> + Â Â Â Â.matches = {
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
> + Â Â Â Â Â Â Â DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
> + Â Â Â Â Â Â Â },
> + Â Â Â },
> +};
> +
> Â/*
> Â* Returns the video capabilities of a specific ACPI graphics device
> Â*
> @@ -164,6 +211,8 @@ long acpi_video_get_capabilities(acpi_handle graphics_handle)
> Â Â Â Â Â Â Â Â * Â Â Â Â Â Â ÂACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
> Â Â Â Â Â Â Â Â *}
> Â Â Â Â Â Â Â Â */
> +
> + Â Â Â Â Â Â Â dmi_check_system(video_detect_dmi_table);
> Â Â Â Â} else {
> Â Â Â Â Â Â Â Âstatus = acpi_bus_get_device(graphics_handle, &tmp_dev);
> Â Â Â Â Â Â Â Âif (ACPI_FAILURE(status)) {
> --
> 1.7.5.4
>

Hi Len,

Maybe this patch should go through your tree and not platform-drivers-x86 ?

Thanks,

-- 
Corentin Chary
http://xf.iksaif.net
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