diff options
| author |   Mario Limonciello <mario.limonciello@amd.com> | 2025-05-14 16:06:40 -0500 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2025-06-03 15:33:38 -0400 |
| commit | 8b5f3a229a70d242322b78c8e13744ca00212def (patch) | |
| tree | 3aa7039f58b046a69fc700981452811320bb3053 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | |
| parent | drm/amd/display: Add debugging message for brightness caps (diff) | |
| download | linux-rng-8b5f3a229a70d242322b78c8e13744ca00212def.tar.xz linux-rng-8b5f3a229a70d242322b78c8e13744ca00212def.zip | |
drm/amd/display: Fix default DC and AC levels
[Why]
DC and AC levels are advertised in a percentage, not a luminance.
[How]
Scale DC and AC levels to supported values.
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4221
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 588f6afb1447..d3100f641ac6 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -4925,9 +4925,9 @@ amdgpu_dm_register_backlight_device(struct amdgpu_dm_connector *aconnector) amdgpu_acpi_get_backlight_caps(&caps); if (caps.caps_valid && get_brightness_range(&caps, &min, &max)) { if (power_supply_is_system_supplied() > 0) - props.brightness = caps.ac_level; + props.brightness = (max - min) * DIV_ROUND_CLOSEST(caps.ac_level, 100); else - props.brightness = caps.dc_level; + props.brightness = (max - min) * DIV_ROUND_CLOSEST(caps.dc_level, 100); /* min is zero, so max needs to be adjusted */ props.max_brightness = max - min; drm_dbg(drm, "Backlight caps: min: %d, max: %d, ac %d, dc %d\n", min, max, |