| Message ID | 20211206063457.1522003-1-kai.heng.feng@canonical.com |
|---|---|
| Headers | show |
| Series | Add support for NVIDIA EC backlight | expand |
On 6.12.2021 8.34, Kai-Heng Feng wrote: > BugLink: https://bugs.launchpad.net/bugs/1953286 > > [Impact] > Some system equipped with NVIDIA GFX cannot change screen brightness. > > [Fix] > Add new way to change brightness. > > [Test] > After the fix is applied, there's a new backlight sysfs > "nvidia_wmi_ec_backlight" can change the screen brightness. > > [Where problems could occur] > The driver relies on BIOS to behave correctly. If the BIOS lies or has a > bug, the new backlight interface will overtake other backlight > interfaces. It's rather unlikely though. > > Daniel Dadap (3): > platform/x86: Add driver for ACPI WMAA EC-based backlight control > platform/x86: Remove "WMAA" from identifier names in > wmaa-backlight-wmi.c > platform/x86: Rename wmaa-backlight-wmi to nvidia-wmi-ec-backlight > > Kai-Heng Feng (1): > UBUNTU: [Config] NVIDIA_WMI_EC_BACKLIGHT=m > > MAINTAINERS | 6 + > debian.master/config/annotations | 1 + > debian.master/config/config.common.ubuntu | 1 + > drivers/platform/x86/Kconfig | 15 ++ > drivers/platform/x86/Makefile | 1 + > .../platform/x86/nvidia-wmi-ec-backlight.c | 213 ++++++++++++++++++ > 6 files changed, 237 insertions(+) > create mode 100644 drivers/platform/x86/nvidia-wmi-ec-backlight.c > applied to oem-5.14, thanks
On Mon, Dec 06, 2021 at 02:34:50PM +0800, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1953286
BugLink: https://bugs.launchpad.net/bugs/1953286 [Impact] Some system equipped with NVIDIA GFX cannot change screen brightness. [Fix] Add new way to change brightness. [Test] After the fix is applied, there's a new backlight sysfs "nvidia_wmi_ec_backlight" can change the screen brightness. [Where problems could occur] The driver relies on BIOS to behave correctly. If the BIOS lies or has a bug, the new backlight interface will overtake other backlight interfaces. It's rather unlikely though. Daniel Dadap (3): platform/x86: Add driver for ACPI WMAA EC-based backlight control platform/x86: Remove "WMAA" from identifier names in wmaa-backlight-wmi.c platform/x86: Rename wmaa-backlight-wmi to nvidia-wmi-ec-backlight Kai-Heng Feng (1): UBUNTU: [Config] NVIDIA_WMI_EC_BACKLIGHT=m MAINTAINERS | 6 + debian.master/config/annotations | 1 + debian.master/config/config.common.ubuntu | 1 + drivers/platform/x86/Kconfig | 15 ++ drivers/platform/x86/Makefile | 1 + .../platform/x86/nvidia-wmi-ec-backlight.c | 213 ++++++++++++++++++ 6 files changed, 237 insertions(+) create mode 100644 drivers/platform/x86/nvidia-wmi-ec-backlight.c