From: Hans de Goede <hdegoede@redhat.com>
To: "Ben Skeggs" <bskeggs@redhat.com>,
"Karol Herbst" <kherbst@redhat.com>, Lyude <lyude@redhat.com>,
"Daniel Dadap" <ddadap@nvidia.com>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"Tvrtko Ursulin" <tvrtko.ursulin@linux.intel.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
Pan@freedesktop.org, Xinhui <Xinhui.Pan@amd.com>,
"Rafael J . Wysocki" <rafael@kernel.org>,
"Mika Westerberg" <mika.westerberg@linux.intel.com>,
"Mark Gross" <markgross@kernel.org>,
"Andy Shevchenko" <andy@kernel.org>
Cc: linux-acpi@vger.kernel.org, David Airlie <airlied@linux.ie>,
nouveau@lists.freedesktop.org,
intel-gfx <intel-gfx@lists.freedesktop.org>,
dri-devel@lists.freedesktop.org,
platform-driver-x86@vger.kernel.org,
Hans de Goede <hdegoede@redhat.com>,
amd-gfx@lists.freedesktop.org, Len Brown <lenb@kernel.org>
Subject: [PATCH 05/14] drm/nouveau: Don't register backlight when another backlight should be used
Date: Tue, 17 May 2022 17:23:22 +0200 [thread overview]
Message-ID: <20220517152331.16217-6-hdegoede@redhat.com> (raw)
In-Reply-To: <20220517152331.16217-1-hdegoede@redhat.com>
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 devices for a single display really is
undesirable, don't register the GPU's native backlight device when
another backlight device should be used.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/gpu/drm/nouveau/nouveau_backlight.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c
index daf9f87477ba..f56ff797c78c 100644
--- a/drivers/gpu/drm/nouveau/nouveau_backlight.c
+++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c
@@ -34,6 +34,8 @@
#include <linux/backlight.h>
#include <linux/idr.h>
+#include <acpi/video.h>
+
#include "nouveau_drv.h"
#include "nouveau_reg.h"
#include "nouveau_encoder.h"
@@ -404,6 +406,11 @@ nouveau_backlight_init(struct drm_connector *connector)
goto fail_alloc;
}
+ if (acpi_video_get_backlight_type(true) != acpi_backlight_native) {
+ NV_INFO(drm, "Skipping nv_backlight registration\n");
+ goto fail_alloc;
+ }
+
if (!nouveau_get_backlight_name(backlight_name, bl)) {
NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
goto fail_alloc;
--
2.36.0
next prev parent reply other threads:[~2022-05-17 15:24 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-17 15:23 [PATCH 00/14] drm/kms: Stop registering multiple /sys/class/backlight devs for a single display Hans de Goede
2022-05-17 15:23 ` [PATCH 01/14] ACPI: video: Add a native function parameter to acpi_video_get_backlight_type() Hans de Goede
2022-05-18 8:55 ` Jani Nikula
2022-05-18 10:06 ` Hans de Goede
2022-05-19 9:02 ` Jani Nikula
2022-06-21 10:06 ` Hans de Goede
2022-05-17 15:23 ` [PATCH 02/14] drm/i915: Don't register backlight when another backlight should be used Hans de Goede
2022-05-17 15:23 ` [PATCH 03/14] drm/amdgpu: " Hans de Goede
2022-05-17 15:23 ` [PATCH 04/14] drm/radeon: " Hans de Goede
2022-05-17 15:23 ` Hans de Goede [this message]
2022-05-18 17:05 ` [PATCH 05/14] drm/nouveau: " Lyude Paul
2022-05-17 15:23 ` [PATCH 06/14] ACPI: video: Drop backlight_device_get_by_type() call from acpi_video_get_backlight_type() Hans de Goede
2022-05-17 15:23 ` [PATCH 07/14] ACPI: video: Remove acpi_video_bus from list before tearing it down Hans de Goede
2022-05-17 15:23 ` [PATCH 08/14] ACPI: video: Simplify acpi_video_unregister_backlight() Hans de Goede
2022-05-17 15:23 ` [PATCH 09/14] ACPI: video: Make backlight class device registration a separate step Hans de Goede
2022-05-20 21:41 ` Daniel Dadap
2022-05-23 23:25 ` Daniel Dadap
2022-05-24 7:10 ` Hans de Goede
2022-05-17 15:23 ` [PATCH 10/14] ACPI: video: Remove code to unregister acpi_video backlight when a native backlight registers Hans de Goede
2022-05-17 15:23 ` [PATCH 11/14] drm/i915: Call acpi_video_register_backlight() Hans de Goede
2022-05-17 15:23 ` [PATCH 12/14] drm/nouveau: Register ACPI video backlight when nv_backlight registration fails Hans de Goede
2022-05-18 17:39 ` Lyude Paul
2022-06-03 6:55 ` Hans de Goede
2022-05-17 15:23 ` [PATCH 13/14] drm/amdgpu: Register ACPI video backlight when skipping amdgpu backlight registration Hans de Goede
2022-05-17 15:23 ` [PATCH 14/14] drm/radeon: Register ACPI video backlight when skipping radeon " Hans de Goede
2022-05-18 8:44 ` [PATCH 00/14] drm/kms: Stop registering multiple /sys/class/backlight devs for a single display Jani Nikula
2022-05-18 10:04 ` Hans de Goede
2022-05-18 10:12 ` Jani Nikula
2022-05-25 15:12 ` Daniel Vetter
2022-05-25 16:24 ` Daniel Dadap
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