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Mario Limonciello 8dbd72cb79 drm/amd/display: Export full brightness range to userspace
[WHY]
Userspace currently is offered a range from 0-0xFF but the PWM is
programmed from 0-0xFFFF.  This can be limiting to some software
that wants to apply greater granularity.

[HOW]
Convert internally to firmware values only when mapping custom
brightness curves because these are in 0-0xFF range. Advertise full
PWM range to userspace.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-06-18 12:19:17 -04:00
arch Merge tag 'drm-msm-next-2025-05-16' of https://gitlab.freedesktop.org/drm/msm into drm-next 2025-05-19 11:05:58 +10:00
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Documentation Driver Changes: 2025-05-29 07:43:10 +10:00
drivers drm/amd/display: Export full brightness range to userspace 2025-06-18 12:19:17 -04:00
fs cifs and smb3 client fixes 2025-05-02 14:37:16 -07:00
include Nova changes for v6.16 2025-05-21 05:49:31 +10:00
init
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kernel tracing updates for v6.15 2025-05-04 10:15:42 -07:00
lib Merge drm/drm-next into drm-misc-next 2025-05-06 09:09:49 +02:00
LICENSES
mm slab fix for 6.15-rc5 2025-05-02 08:50:10 -07:00
net Happy May Day. 2025-05-01 10:37:49 -07:00
rust Nova changes for v6.16 2025-05-21 05:49:31 +10:00
samples Nova changes for v6.16 2025-05-21 05:49:31 +10:00
scripts checkpatch: remove %p4cn 2025-05-06 11:33:49 -04:00
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tools perf tools fixes for v6.15-rc5 2025-05-04 12:57:18 -07:00
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MAINTAINERS Nova changes for v6.16 2025-05-21 05:49:31 +10:00
Makefile Linux 6.15-rc5 2025-05-04 13:55:04 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.