On Tue, Jan 17, 2012 at 08:08:18AM +0100, Corentin Chary 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>
> ---
> drivers/acpi/video_detect.c | 49 +++++++++++++++++++++++++++++++++++++++++++
> 1 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)
> return AE_OK;
> }
>
> +/* 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)
> +{
> + acpi_video_support |= ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
> + return 0;
> +}
> +
> +static struct dmi_system_id video_detect_dmi_table[] = {
> + {
> + .callback = video_detect_force_vendor,
> + .ident = "N150P",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "N150P"),
> + DMI_MATCH(DMI_BOARD_NAME, "N150P"),
> + },
> + },
> + {
> + .callback = video_detect_force_vendor,
> + .ident = "N145P/N250P/N260P",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "N145P/N250P/N260P"),
> + DMI_MATCH(DMI_BOARD_NAME, "N145P/N250P/N260P"),
> + },
> + },
> + {
> + .callback = video_detect_force_vendor,
> + .ident = "N150/N210/N220",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "N150/N210/N220"),
> + DMI_MATCH(DMI_BOARD_NAME, "N150/N210/N220"),
> + },
> + },
> + {
> + .callback = video_detect_force_vendor,
> + .ident = "NF110/NF210/NF310",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "NF110/NF210/NF310"),
> + DMI_MATCH(DMI_BOARD_NAME, "NF110/NF210/NF310"),
> + },
> + },
> +};
> +
> /*
> * Returns the video capabilities of a specific ACPI graphics device
> *
> @@ -164,6 +211,8 @@ long acpi_video_get_capabilities(acpi_handle graphics_handle)
> * ACPI_VIDEO_BACKLIGHT_DMI_VENDOR;
> *}
> */
> +
> + dmi_check_system(video_detect_dmi_table);
> } else {
> status = acpi_bus_get_device(graphics_handle, &tmp_dev);
> if (ACPI_FAILURE(status)) {
> --
> 1.7.5.4
>
This is working great on the NF310. Thanks!
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