On Wed, Aug 24, 2022 at 8:28 PM Limonciello, Mario
wrote:
>
> [Public]
>
>
>
> > -Original Message-
> > From: Kai-Heng Feng
> > Sent: Wednesday, August 24, 2022 09:17
> > To: Limonciello, Mario
> > Cc: raf...@kernel.org; Len Brown ;
> > nouveau@lists.freedesktop.org; hdego...@redhat.com;
acpi_backlight=native is the default for the "Samsung X360", but as
the comment explains the quirk was still necessary because even
briefly registering the acpi_video0 backlight; and then unregistering
it once the native driver showed up, was leading to issues.
After the "ACPI: video: Make backlig
Add an entry summarizing the discussion about dealing with brightness
control on devices with more then 1 internal panel.
The original discussion can be found here:
https://lore.kernel.org/dri-devel/20220517152331.16217-1-hdego...@redhat.com/
Reviewed-by: Lyude Paul
Signed-off-by: Hans de Goede
The video_detect_dmi_table[] uses an unusual indentation for
before the ".name = ..." named struct initializers.
Instead of being indented with an extra tab compared to
the previous line's '{' these are indented to with only
a single space to allow for long DMI_MATCH() lines without
wrapping.
But
acpi_backlight=native is the default for these, but as the comment
explains the quirk was still necessary because even briefly registering
the acpi_video0 backlight; and then unregistering it once the native
driver showed up, was leading to issues.
After the "ACPI: video: Make backlight class devi
Remove the asus-wmi quirk_entry.wmi_backlight_native quirk-flag, which
called acpi_video_set_dmi_backlight_type(acpi_backlight_native) and replace
it with acpi/video_detect.c video_detect_dmi_table[] entries using the
video_detect_force_native callback.
acpi_video_set_dmi_backlight_type() is troub
acpi_video_set_dmi_backlight_type() is troublesome because it may end up
getting called after other backlight drivers have already called
acpi_video_get_backlight_type() resulting in the other drivers
already being registered even though they should not.
Move all the acpi_backlight=[vendor|native]
acpi_video_set_dmi_backlight_type() is troublesome because it may end
up getting called after other backlight drivers have already called
acpi_video_get_backlight_type() resulting in the other drivers
already being registered even though they should not.
In case of the acpi_video backlight, acpi_v
Move the backlight DMI quirks to acpi/video_detect.c, so that
the driver no longer needs to call acpi_video_set_dmi_backlight_type().
acpi_video_set_dmi_backlight_type() is troublesome because it may end up
getting called after other backlight drivers have already called
acpi_video_get_backlight_t
Remove this check from the asus-wmi backlight handling:
/* Some Asus desktop boards export an acpi-video backlight interface,
stop this from showing up */
chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
if (chassis_type && !strcmp(chassis_type, "3"))
Remove the asus-wmi quirk_entry.wmi_backlight_power quirk-flag, which
called acpi_video_set_dmi_backlight_type(acpi_backlight_vendor) and replace
it with acpi/video_detect.c video_detect_dmi_table[] entries using the
video_detect_force_vendor callback.
acpi_video_set_dmi_backlight_type() is troubl
On Apple laptops with an Apple GMUX using this for brightness control,
should take precedence of any other brightness control methods.
Add apple-gmux detection to acpi_video_get_backlight_type() using
the already existing apple_gmux_present() helper function.
This will allow removig the (ab)use o
Add an acpi_video_get_backlight_type() == acpi_backlight_nvidia_wmi_ec
check. This will make nvidia-wmi-ec-backlight properly honor the user
selecting a different backlight driver through the acpi_backlight=...
kernel commandline option.
Since the auto-detect code check for nvidia-wmi-ec-backlight
Now that acpi_video_get_backlight_type() has apple-gmux detection (using
apple_gmux_present()), it is no longer necessary for the apple-gmux code
to manually remove possibly conflicting drivers.
So remove the handling for this from the apple-gmux driver.
Signed-off-by: Hans de Goede
---
drivers
acpi_video_set_dmi_backlight_type() is troublesome because it may end up
getting called after other backlight drivers have already called
acpi_video_get_backlight_type() resulting in the other drivers
already being registered even though they should not.
In case of the acpi_video backlight, acpi_v
On some new laptop designs a new Nvidia specific WMI interface is present
which gives info about panel brightness control and may allow controlling
the brightness through this interface when the embedded controller is used
for brightness control.
When this WMI interface is present and indicates th
Refactor acpi_video_get_backlight_type() so that the heuristics /
detection steps are stricly in order of descending precedence.
Also move the comments describing the steps to when the various steps are
actually done, to avoid the comments getting out of sync with the code.
Acked-by: Rafael J. Wy
Move the WMI interface definitions to a header, so that the definitions
can be shared with drivers/acpi/video_detect.c .
Changes in v2:
- Add missing Nvidia copyright header
- Move WMI_BRIGHTNESS_GUID to nvidia-wmi-ec-backlight.h as well
Suggested-by: Daniel Dadap
Signed-off-by: Hans de Goede
-
Typically the acpi_video driver will initialize before radeon, which
used to cause /sys/class/backlight/acpi_video0 to get registered and then
radeon would register its own radeon_bl# device later. After which
the drivers/acpi/video_detect.c code unregistered the acpi_video0 device
to avoid there b
Typically the acpi_video driver will initialize before amdgpu, which
used to cause /sys/class/backlight/acpi_video0 to get registered and then
amdgpu would register its own amdgpu_bl# device later. After which
the drivers/acpi/video_detect.c code unregistered the acpi_video0 device
to avoid there b
Typically the acpi_video driver will initialize before nouveau, which
used to cause /sys/class/backlight/acpi_video0 to get registered and then
nouveau would register its own nv_backlight device later. After which
the drivers/acpi/video_detect.c code unregistered the acpi_video0 device
to avoid the
Remove the code to unregister acpi_video backlight devices when
a native backlight device gets registered later.
Now that the acpi_video backlight device registration is a separate step
which runs later, after the drm/kms driver is done setting up its own
native backlight device, it is no longer n
On machins without an i915 opregion the acpi_video driver immediately
probes the ACPI video bus and used to also immediately register
acpi_video# backlight devices when supported.
Once the drm/kms driver then loaded later and possibly registered
a native backlight device then the drivers/acpi/vide
When acpi_video_register() has not run yet the video_bus_head will be
empty, so there is no need to check the register_count flag first.
Acked-by: Rafael J. Wysocki
Signed-off-by: Hans de Goede
---
drivers/acpi/acpi_video.c | 12
1 file changed, 4 insertions(+), 8 deletions(-)
dif
On x86/ACPI boards the acpi_video driver will usually initialize before
the kms driver (except i915). This causes /sys/class/backlight/acpi_video0
to show up and then the kms driver registers its own native backlight
device after which the drivers/acpi/video_detect.c code unregisters
the acpi_video
Move the list_del removing an acpi_video_bus from video_bus_head
on teardown to before the teardown is done, to avoid code iterating
over the video_bus_head list seeing acpi_video_bus objects on there
which are (partly) torn down already.
Acked-by: Rafael J. Wysocki
Signed-off-by: Hans de Goede
All x86/ACPI kms drivers which register native/BACKLIGHT_RAW type
backlight devices call acpi_video_backlight_use_native() now. This sets
__acpi_video_get_backlight_type()'s internal static native_available flag.
This makes the backlight_device_get_by_type(BACKLIGHT_RAW) check
unnecessary.
Relyin
Before this commit when we want userspace to use the acpi_video backlight
device we register both the GPU's native backlight device and acpi_video's
firmware acpi_video# backlight device. This relies on userspace preferring
firmware type backlight devices over native ones.
Registering 2 backlight
Before this commit when we want userspace to use the acpi_video backlight
device we register both the GPU's native backlight device and acpi_video's
firmware acpi_video# backlight device. This relies on userspace preferring
firmware type backlight devices over native ones.
Registering 2 backlight
ATM on x86 laptops where we want userspace to use the acpi_video backlight
device we often register both the GPU's native backlight device and
acpi_video's firmware acpi_video# backlight device. This relies on
userspace preferring firmware type backlight devices over native ones, but
registering 2
Before this commit when we want userspace to use the acpi_video backlight
device we register both the GPU's native backlight device and acpi_video's
firmware acpi_video# backlight device. This relies on userspace preferring
firmware type backlight devices over native ones.
Registering 2 backlight
Before this commit when we want userspace to use the acpi_video backlight
device we register both the GPU's native backlight device and acpi_video's
firmware acpi_video# backlight device. This relies on userspace preferring
firmware type backlight devices over native ones.
Registering 2 backlight
Hi All,
As mentioned in my RFC titled "drm/kms: control display brightness through
drm_connector properties":
https://lore.kernel.org/dri-devel/0d188965-d809-81b5-74ce-7d30c49fe...@redhat.com/
The first step towards this is to deal with some existing technical debt
in backlight handling on x86/AC
Reviewed-by: Lyude Paul
On Wed, 2022-08-24 at 14:15 +0200, Hans de Goede wrote:
> Add an entry summarizing the discussion about dealing with brightness
> control on devices with more then 1 internal panel.
>
> The original discussion can be found here:
> https://lore.kernel.org/dri-devel/2022051
Reviewed-by: Lyude Paul
On Wed, 2022-08-24 at 14:15 +0200, Hans de Goede wrote:
> Typically the acpi_video driver will initialize before nouveau, which
> used to cause /sys/class/backlight/acpi_video0 to get registered and then
> nouveau would register its own nv_backlight device later. After whi
Just one tiny nitpick below:
On Wed, 2022-08-24 at 14:14 +0200, Hans de Goede wrote:
> Before this commit when we want userspace to use the acpi_video backlight
> device we register both the GPU's native backlight device and acpi_video's
> firmware acpi_video# backlight device. This relies on user
Hi All,
On 8/24/22 14:50, Jani Nikula wrote:
> On Wed, 24 Aug 2022, Hans de Goede wrote:
>> Before this commit when we want userspace to use the acpi_video backlight
>> device we register both the GPU's native backlight device and acpi_video's
>> firmware acpi_video# backlight device. This relies
Hi Lyude,
Thank you for the review.
On 8/24/22 19:41, Lyude Paul wrote:
> Just one tiny nitpick below:
>
> On Wed, 2022-08-24 at 14:14 +0200, Hans de Goede wrote:
>> Before this commit when we want userspace to use the acpi_video backlight
>> device we register both the GPU's native backlight de
38 matches
Mail list logo
