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ACPI: video: Add acpi_backlight=vendor quirk for Toshiba Portégé R100

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Toshiba Portégé R100 has both acpi_video and toshiba_acpi vendor
backlight driver working. But none of them gets activated as it has
a VGA with no kernel driver (Trident CyberBlade XP4m32).

The DMI strings are very generic ("Portable PC") so add a custom
callback function to check for Trident CyberBlade XP4m32 PCI device
before enabling the vendor backlight driver (better than acpi_video
as it has more brightness steps).

Fixes: 5aa9d943e9 ("ACPI: video: Don't enable fallback path for creating ACPI backlight by default")
Signed-off-by: Ondrej Zary <linux@zary.sk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ondrej Zary 2023-09-29 22:20:55 +02:00 committed by Rafael J. Wysocki
parent c9aa36fadd
commit 35a341c9b2
1 changed files with 26 additions and 0 deletions
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26
drivers/acpi/video_detect.c
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@ -130,6 +130,16 @@ static int video_detect_force_native(const struct dmi_system_id *d)
return 0;
}
static int video_detect_portege_r100(const struct dmi_system_id *d)
{
struct pci_dev *dev;
/* Search for Trident CyberBlade XP4m32 to confirm Portégé R100 */
dev = pci_get_device(PCI_VENDOR_ID_TRIDENT, 0x2100, NULL);
if (dev)
acpi_backlight_dmi = acpi_backlight_vendor;
return 0;
}
static const struct dmi_system_id video_detect_dmi_table[] = {
/*
* Models which should use the vendor backlight interface,
@ -262,6 +272,22 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
},
/*
* Toshiba Portégé R100 has working both acpi_video and toshiba_acpi
* vendor driver. But none of them gets activated as it has a VGA with
* no kernel driver (Trident CyberBlade XP4m32).
* The DMI strings are generic so check for the VGA chip in callback.
*/
{
.callback = video_detect_portege_r100,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
DMI_MATCH(DMI_BOARD_NAME, "Portable PC")
},
},
/*
* Models which need acpi_video backlight control where the GPU drivers
* do not call acpi_video_register_backlight() because no internal panel