linux-kernel - [PATCH 02/22] ACPI: video: Introduce acpi_video_get_backlight

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Date:   Mon, 24 Oct 2022 20:34:53 +0900
From:   Akihiko Odaki <akihiko.odaki@...nix.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Jonathan Corbet <corbet@....net>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        "Lee, Chun-Yi" <jlee@...e.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Corentin Chary <corentin.chary@...il.com>,
        Cezary Jackiewicz <cezary.jackiewicz@...il.com>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Pali Rohár <pali@...nel.org>,
        Jonathan Woithe <jwoithe@...t42.net>,
        Ike Panhc <ike.pan@...onical.com>,
        Daniel Dadap <ddadap@...dia.com>,
        Kenneth Chan <kenneth.t.chan@...il.com>,
        Mattia Dongili <malattia@...ux.it>,
        Henrique de Moraes Holschuh <hmh@....eng.br>,
        Azael Avalos <coproscefalo@...il.com>,
        Lee Jones <lee@...nel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Helge Deller <deller@....de>,
        Robert Moore <robert.moore@...el.com>,
        dri-devel@...ts.freedesktop.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org,
        platform-driver-x86@...r.kernel.org,
        acpi4asus-user@...ts.sourceforge.net,
        ibm-acpi-devel@...ts.sourceforge.net, linux-fbdev@...r.kernel.org,
        devel@...ica.org, Akihiko Odaki <akihiko.odaki@...nix.com>
Subject: [PATCH 02/22] ACPI: video: Introduce acpi_video_get_backlight_types()

This deprecates acpi_video_get_backlight_type().

Signed-off-by: Akihiko Odaki <akihiko.odaki@...nix.com>
---
 drivers/acpi/acpi_video.c   |  2 +-
 drivers/acpi/video_detect.c |  6 +++---
 include/acpi/video.h        | 12 ++++++++++++
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
index 32953646caeb..63e41aac71bd 100644
--- a/drivers/acpi/acpi_video.c
+++ b/drivers/acpi/acpi_video.c
@@ -1823,7 +1823,7 @@ static int acpi_video_bus_register_backlight(struct acpi_video_bus *video)
 	if (video->backlight_registered)
 		return 0;
 
-	if (acpi_video_get_backlight_type() != acpi_backlight_video)
+	if (!(acpi_video_get_backlight_types() & ACPI_BACKLIGHT_VIDEO))
 		return 0;
 
 	mutex_lock(&video->device_list_lock);
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 0d9064a9804c..9cb12e4f06f7 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -17,13 +17,13 @@
  * Otherwise vendor specific drivers like thinkpad_acpi, asus-laptop,
  * sony_acpi,... can take care about backlight brightness.
  *
- * Backlight drivers can use acpi_video_get_backlight_type() to determine which
+ * Backlight drivers can use acpi_video_get_backlight_types() to determine which
  * driver should handle the backlight. RAW/GPU-driver backlight drivers must
  * use the acpi_video_backlight_use_native() helper for this.
  *
  * If CONFIG_ACPI_VIDEO is neither set as "compiled in" (y) nor as a module (m)
- * this file will not be compiled and acpi_video_get_backlight_type() will
- * always return acpi_backlight_vendor.
+ * this file will not be compiled and acpi_video_get_backlight_types() will
+ * always return ACPI_BACKLIGHT_VENDOR.
  */
 
 #include <linux/export.h>
diff --git a/include/acpi/video.h b/include/acpi/video.h
index a275c35e5249..a565ba27fae0 100644
--- a/include/acpi/video.h
+++ b/include/acpi/video.h
@@ -2,6 +2,7 @@
 #ifndef __ACPI_VIDEO_H
 #define __ACPI_VIDEO_H
 
+#include <linux/bits.h> /* for BIT */
 #include <linux/errno.h> /* for ENODEV */
 #include <linux/types.h> /* for bool */
 
@@ -52,6 +53,12 @@ enum acpi_backlight_type {
 	acpi_backlight_apple_gmux,
 };
 
+#define ACPI_BACKLIGHT_VIDEO BIT(acpi_backlight_video)
+#define ACPI_BACKLIGHT_VENDOR BIT(acpi_backlight_vendor)
+#define ACPI_BACKLIGHT_NATIVE BIT(acpi_backlight_native)
+#define ACPI_BACKLIGHT_NVIDIA_WMI_EC BIT(acpi_backlight_nvidia_wmi_ec)
+#define ACPI_BACKLIGHT_APPLE_GMUX BIT(acpi_backlight_apple_gmux)
+
 #if IS_ENABLED(CONFIG_ACPI_VIDEO)
 extern int acpi_video_register(void);
 extern void acpi_video_unregister(void);
@@ -97,4 +104,9 @@ static inline int acpi_video_get_levels(struct acpi_device *device,
 }
 #endif
 
+static inline int acpi_video_get_backlight_types(void)
+{
+	return BIT(acpi_video_get_backlight_type());
+}
+
 #endif
-- 
2.37.3