| Message ID | 20220707180953.605246-1-wse@tuxedocomputers.com |
|---|---|
| State | Accepted |
| Commit | c752089f7cf5b5800c6ace4cdd1a8351ee78a598 |
| Headers | show |
| Series | [1/2] ACPI: video: Force backlight native for some TongFang devices | expand |
On Wed, Jul 13, 2022 at 7:25 PM Hans de Goede <hdegoede@redhat.com> wrote: > > Hi, > > On 7/7/22 20:09, Werner Sembach wrote: > > The TongFang PF5PU1G, PF4NU1F, PF5NU1G, and PF5LUXG/TUXEDO BA15 Gen10, > > Pulse 14/15 Gen1, and Pulse 15 Gen2 have the same problem as the Clevo > > NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2: > > They have a working native and video interface. However the default > > detection mechanism first registers the video interface before > > unregistering it again and switching to the native interface during boot. > > This results in a dangling SBIOS request for backlight change for some > > reason, causing the backlight to switch to ~2% once per boot on the first > > power cord connect or disconnect event. Setting the native interface > > explicitly circumvents this buggy behaviour by avoiding the unregistering > > process. > > > > Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> > > Cc: stable@vger.kernel.org > > Thanks, the series looks good to me: > > Reviewed-by: Hans de Goede <hdegoede@redhat.com> > > for the series. Both patches applied as 5.20 material, thanks!
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index becc198e4c22..cdde2e069d63 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -490,7 +490,56 @@ static const struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), }, }, - + /* + * The TongFang PF5PU1G, PF4NU1F, PF5NU1G, and PF5LUXG/TUXEDO BA15 Gen10, + * Pulse 14/15 Gen1, and Pulse 15 Gen2 have the same problem as the Clevo + * NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2. See the description + * above. + */ + { + .callback = video_detect_force_native, + .ident = "TongFang PF5PU1G", + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "PF5PU1G"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "TongFang PF4NU1F", + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "PF4NU1F"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "TongFang PF4NU1F", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "PULSE1401"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "TongFang PF5NU1G", + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "PF5NU1G"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "TongFang PF5NU1G", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "TUXEDO"), + DMI_MATCH(DMI_BOARD_NAME, "PULSE1501"), + }, + }, + { + .callback = video_detect_force_native, + .ident = "TongFang PF5LUXG", + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "PF5LUXG"), + }, + }, /* * Desktops which falsely report a backlight and which our heuristics * for this do not catch.
The TongFang PF5PU1G, PF4NU1F, PF5NU1G, and PF5LUXG/TUXEDO BA15 Gen10, Pulse 14/15 Gen1, and Pulse 15 Gen2 have the same problem as the Clevo NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2: They have a working native and video interface. However the default detection mechanism first registers the video interface before unregistering it again and switching to the native interface during boot. This results in a dangling SBIOS request for backlight change for some reason, causing the backlight to switch to ~2% once per boot on the first power cord connect or disconnect event. Setting the native interface explicitly circumvents this buggy behaviour by avoiding the unregistering process. Signed-off-by: Werner Sembach <wse@tuxedocomputers.com> Cc: stable@vger.kernel.org --- drivers/acpi/video_detect.c | 51 ++++++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-)