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drm/amd/display: option to maximize lb usage

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experimental change for testing if max line buffer result in better stutter efficiency

for 1080p, LB can hold up to 9 line at 10bpcc, potentially add 10 line time of
latency hiding.

Signed-off-by: Tony Cheng <tony.cheng@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tony Cheng
2017-09-26 01:56:00 -04:00
committed by Alex Deucher
parent a32a7708ae
commit 966869d07a
2 changed files with 9 additions and 2 deletions
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8
drivers/gpu/drm/amd/display/dc/dc.h
View File

@@ -181,15 +181,19 @@ struct dc_debug {
bool timing_trace;
bool clock_trace;
bool validation_trace;
/* stutter efficiency related */
bool disable_stutter;
bool use_max_lb;
enum dcc_option disable_dcc;
enum pipe_split_policy pipe_split_policy;
bool force_single_disp_pipe_split;
bool disable_dfs_bypass;
bool disable_dpp_power_gate;
bool disable_hubp_power_gate;
bool disable_pplib_wm_range;
bool use_dml_wm;
enum pipe_split_policy pipe_split_policy;
bool force_single_disp_pipe_split;
unsigned int min_disp_clk_khz;
int sr_exit_time_dpm0_ns;
int sr_enter_plus_exit_time_dpm0_ns;

3
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c
View File

@@ -507,6 +507,9 @@ static enum lb_memory_config find_lb_memory_config(struct dcn10_dpp *xfm,
{
enum lb_memory_config mem_cfg = LB_MEMORY_CONFIG_0;
if (xfm->base.ctx->dc->debug.use_max_lb)
return mem_cfg;
if (xfm->tf_mask->PIXEL_DEPTH) {
mem_cfg = dpp10_find_lb_memory_config(scl_data);
}