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drm/amd/display: Fixed dim around 1sec when resume from S3 (v2) 

root cause:
DMCU try to perform a smoothness brightness change.Incorrect initial
brightness level causes the 1 sec dim.
Change:
Cache brightness level in stream, and clear it when edp backlight on.
If brightness level in stream is 0, set brightness with ramp value is 0.
DMCU will set the brightness without smoothness transition.

v2: squash in null pointer fix (Harry)

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yongqiang Sun 2018-03-05 10:28:34 -05:00 committed by Alex Deucher
parent 2a54bd6e08
commit 14d6f64436
3 changed files with 11 additions and 1 deletions
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7
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@ -1960,6 +1960,13 @@ bool dc_link_set_backlight_level(const struct dc_link *link, uint32_t level,
(abm->funcs->set_backlight_level == NULL))
return false;
if (stream) {
if (stream->bl_pwm_level == 0)
frame_ramp = 0;
((struct dc_stream_state *)stream)->bl_pwm_level = level;
}
use_smooth_brightness = dmcu->funcs->is_dmcu_initialized(dmcu);
DC_LOG_BACKLIGHT("New Backlight level: %d (0x%X)\n", level, level);

1
drivers/gpu/drm/amd/display/dc/dc_stream.h
View File

@ -78,6 +78,7 @@ struct dc_stream_state {
/* DMCU info */
unsigned int abm_level;
unsigned int bl_pwm_level;
/* from core_stream struct */
struct dc_context *ctx;

4
drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
View File

@ -1006,8 +1006,10 @@ void dce110_unblank_stream(struct pipe_ctx *pipe_ctx,
if (dc_is_dp_signal(pipe_ctx->stream->signal))
pipe_ctx->stream_res.stream_enc->funcs->dp_unblank(pipe_ctx->stream_res.stream_enc, &params);
if (link->local_sink && link->local_sink->sink_signal == SIGNAL_TYPE_EDP)
if (link->local_sink && link->local_sink->sink_signal == SIGNAL_TYPE_EDP) {
link->dc->hwss.edp_backlight_control(link, true);
stream->bl_pwm_level = 0;
}
}
void dce110_blank_stream(struct pipe_ctx *pipe_ctx)
{