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| author | Hans de Goede <hdegoede@redhat.com> | 2021-10-05 23:23:14 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2021-10-14 14:12:21 +0300 |
| commit | a1a98689301b9af0313e4c1ba44558e8b67ff76e (patch) | |
| tree | 90193340cfdbb1f68176948c2ce9f7afade41253 /Documentation/gpu | |
| parent | 107fe904302092c683cf5462b4af3cb3cfa40998 (diff) | |
| download | linux-a1a98689301b9af0313e4c1ba44558e8b67ff76e.tar.xz | |
drm: Add privacy-screen class (v4)
On some new laptops the LCD panel has a builtin electronic privacy-screen.
We want to export this functionality as a property on the drm connector
object. But often this functionality is not exposed on the GPU but on some
other (ACPI) device.
This commit adds a privacy-screen class allowing the driver for these
other devices to register themselves as a privacy-screen provider; and
allowing the drm/kms code to get a privacy-screen provider associated
with a specific GPU/connector combo.
Changes in v2:
- Make CONFIG_DRM_PRIVACY_SCREEN a bool which controls if the drm_privacy
code gets built as part of the main drm module rather then making it
a tristate which builds its own module.
- Add a #if IS_ENABLED(CONFIG_DRM_PRIVACY_SCREEN) check to
drm_privacy_screen_consumer.h and define stubs when the check fails.
Together these 2 changes fix several dependency issues.
- Remove module related code now that this is part of the main drm.ko
- Use drm_class as class for the privacy-screen devices instead of
adding a separate class for this
Changes in v3:
- Make the static inline drm_privacy_screen_get_state() stub set sw_state
and hw_state to PRIVACY_SCREEN_DISABLED to squelch an uninitialized
variable warning when CONFIG_DRM_PRIVICAY_SCREEN is not set
Changes in v4:
- Make drm_privacy_screen_set_sw_state() skip calling out to the hw if
hw_state == new_sw_state
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211005202322.700909-3-hdegoede@redhat.com
Diffstat (limited to 'Documentation/gpu')
| -rw-r--r-- | Documentation/gpu/drm-kms-helpers.rst | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-kms-helpers.rst b/Documentation/gpu/drm-kms-helpers.rst index ec2f65b31930..5bb55ec1b9b5 100644 --- a/Documentation/gpu/drm-kms-helpers.rst +++ b/Documentation/gpu/drm-kms-helpers.rst @@ -435,3 +435,18 @@ Legacy CRTC/Modeset Helper Functions Reference .. kernel-doc:: drivers/gpu/drm/drm_crtc_helper.c :export: + +Privacy-screen class +==================== + +.. kernel-doc:: drivers/gpu/drm/drm_privacy_screen.c + :doc: overview + +.. kernel-doc:: include/drm/drm_privacy_screen_driver.h + :internal: + +.. kernel-doc:: include/drm/drm_privacy_screen_machine.h + :internal: + +.. kernel-doc:: drivers/gpu/drm/drm_privacy_screen.c + :export: |