From 14d6f644368de1a890b747547f36cef0423fbec8 Mon Sep 17 00:00:00 2001 From: Yongqiang Sun Date: Mon, 5 Mar 2018 10:28:34 -0500 Subject: [PATCH] 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 Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 7 +++++++ drivers/gpu/drm/amd/display/dc/dc_stream.h | 1 + drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 4 +++- 3 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index f8c09273..eeb0447 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -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); diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h index 13e5ac9..d017df5 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_stream.h +++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h @@ -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; diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c index 3e9cd1b..30dd62f 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c @@ -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, ¶ms); - 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) { -- 2.7.4