diff options
| author | Anthony Koo <Anthony.Koo@amd.com> | 2018-10-13 04:34:32 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-11-05 22:21:39 +0300 |
| commit | 262485a50fd4532a8d71165190adc7a0a19bcc9e (patch) | |
| tree | 60819d7cabbd30625d27bbd05841e239fdca29c3 /drivers/gpu/drm/amd/display/dc/inc/hw/abm.h | |
| parent | a7d8084b589714ea08bddd3720986b657840f46b (diff) | |
| download | linux-262485a50fd4532a8d71165190adc7a0a19bcc9e.tar.xz | |
drm/amd/display: Expand dc to use 16.16 bit backlight
[Why] We want to increase precision for backlight setting.
But DC interface takes 8 bit backlight level value only.
[How] DMCU already takes 16 bit backlight level.
Expand the DC interface to take 16.16 bit value.
Max 32 bit backlight value (0xFFFF) will represent
max backlight (100%)
Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/inc/hw/abm.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/hw/abm.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h b/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h index a83a48494613..458a641dc796 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h @@ -47,12 +47,17 @@ struct abm_funcs { bool (*set_abm_level)(struct abm *abm, unsigned int abm_level); bool (*set_abm_immediate_disable)(struct abm *abm); bool (*init_backlight)(struct abm *abm); - bool (*set_backlight_level)(struct abm *abm, - unsigned int backlight_level, + + /* backlight_pwm_u16_16 is unsigned 32 bit, + * 16 bit integer + 16 fractional, where 1.0 is max backlight value. + */ + bool (*set_backlight_level_pwm)(struct abm *abm, + unsigned int backlight_pwm_u16_16, unsigned int frame_ramp, unsigned int controller_id, bool use_smooth_brightness); - unsigned int (*get_current_backlight_8_bit)(struct abm *abm); + + unsigned int (*get_current_backlight)(struct abm *abm); }; #endif |