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| author | Eryk Brol <eryk.brol@amd.com> | 2019-05-15 15:12:41 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-05-31 10:39:33 -0500 |
| commit | e25228b02e4833e5b0fdd262801a2ae6cc72b39d (patch) | |
| tree | 2eaae99414e89e20c34887fef359f6e31f0903a7 /drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c | |
| parent | 8633d96d3ca14b37dffe303281c1dff320b422fb (diff) | |
| download | linux-e25228b02e4833e5b0fdd262801a2ae6cc72b39d.tar.gz linux-e25228b02e4833e5b0fdd262801a2ae6cc72b39d.tar.bz2 linux-e25228b02e4833e5b0fdd262801a2ae6cc72b39d.zip | |
drm/amd/display: Increase Backlight Gain Step Size
[Why]
Some backlight tests fail due to backlight settling
taking too long. This happens because the step
size used to change backlight levels is too small.
[How]
1. Change the size of the backlight gain step size
2. Change how DMCU firmware gets the step size value
so that it is passed in by driver during DMCU initn
Signed-off-by: Eryk Brol <eryk.brol@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@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/dce/dce_dmcu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c index 6504227ead9c..c2bc36f9f6c7 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c @@ -388,6 +388,9 @@ static bool dcn10_dmcu_init(struct dmcu *dmcu) /* Set initialized ramping boundary value */ REG_WRITE(MASTER_COMM_DATA_REG1, 0xFFFF); + /* Set backlight ramping stepsize */ + REG_WRITE(MASTER_COMM_DATA_REG2, abm_gain_stepsize); + /* Set command to initialize microcontroller */ REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, MCP_INIT_DMCU); |