From a1a98689301b9af0313e4c1ba44558e8b67ff76e Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Tue, 5 Oct 2021 22:23:14 +0200 Subject: 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 Reviewed-by: Lyude Paul Signed-off-by: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20211005202322.700909-3-hdegoede@redhat.com --- drivers/gpu/drm/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/gpu/drm/Kconfig') diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index a4c020a9a0eb..b91f0ce8154c 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -496,3 +496,7 @@ config DRM_PANEL_ORIENTATION_QUIRKS config DRM_LIB_RANDOM bool default n + +config DRM_PRIVACY_SCREEN + bool + default n -- cgit v1.2.3