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| author | Anthony Koo | 2017-05-04 20:09:09 +0200 |
|---|---|---|
| committer | Alex Deucher | 2017-09-27 00:06:59 +0200 |
| commit | fe626734711b5f402fca9df5d33cb0663b6c2fe5 (patch) | |
| tree | 1e6cf58a866a409cdd1c5dbebfbc4edca209aa01 /drivers/gpu/drm/amd/display | |
| parent | drm/amd/display: Continue with stream enable if DP link training fails. (diff) | |
| download | kernel-qcow2-linux-fe626734711b5f402fca9df5d33cb0663b6c2fe5.tar.gz kernel-qcow2-linux-fe626734711b5f402fca9df5d33cb0663b6c2fe5.tar.xz kernel-qcow2-linux-fe626734711b5f402fca9df5d33cb0663b6c2fe5.zip | |
drm/amd/display: Implement support for backlight optimization
- Add functionality to get real hw backlight level as opposed to user
level, meaning the level that takes into account backlight ramping
over time and backlight reduction due to Varibright
- Add backlight optimization which allows for a second OS state
that is able to control ABM
Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_abm.c | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/inc/hw/abm.h | 1 |
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c index 393c43559825..cefffe164fe0 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c @@ -60,7 +60,7 @@ struct abm_backlight_registers { static struct abm_backlight_registers stored_backlight_registers = {0}; -static unsigned int get_current_backlight(struct dce_abm *abm_dce) +static unsigned int get_current_backlight_16_bit(struct dce_abm *abm_dce) { uint64_t current_backlight; uint32_t round_result; @@ -252,7 +252,7 @@ static void dmcu_set_backlight_level( static void dce_abm_init(struct abm *abm) { struct dce_abm *abm_dce = TO_DCE_ABM(abm); - unsigned int backlight = get_current_backlight(abm_dce); + unsigned int backlight = get_current_backlight_16_bit(abm_dce); REG_WRITE(DC_ABM1_HG_SAMPLE_RATE, 0x103); REG_WRITE(DC_ABM1_HG_SAMPLE_RATE, 0x101); @@ -289,6 +289,14 @@ static void dce_abm_init(struct abm *abm) ABM1_BL_REG_READ_MISSED_FRAME_CLEAR, 1); } +static unsigned int dce_abm_get_current_backlight_8_bit(struct abm *abm) +{ + struct dce_abm *abm_dce = TO_DCE_ABM(abm); + unsigned int backlight = REG_READ(BL1_PWM_CURRENT_ABM_LEVEL); + + return (backlight >> 8); +} + static bool dce_abm_set_level(struct abm *abm, uint32_t level) { struct dce_abm *abm_dce = TO_DCE_ABM(abm); @@ -405,6 +413,7 @@ static const struct abm_funcs dce_funcs = { .set_abm_level = dce_abm_set_level, .init_backlight = dce_abm_init_backlight, .set_backlight_level = dce_abm_set_backlight_level, + .get_current_backlight_8_bit = dce_abm_get_current_backlight_8_bit, .is_dmcu_initialized = is_dmcu_initialized }; 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 ceabbd3bf5f8..da465b3e98e8 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h @@ -40,6 +40,7 @@ struct abm_funcs { unsigned int backlight_level, unsigned int frame_ramp, unsigned int controller_id); + unsigned int (*get_current_backlight_8_bit)(struct abm *abm); bool (*is_dmcu_initialized)(struct abm *abm); }; |