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From 0462db32a239137cb433be52bb73faf4346788dd Mon Sep 17 00:00:00 2001
From: Tony Cheng <tony.cheng@amd.com>
Date: Tue, 26 Sep 2017 01:56:00 -0400
Subject: [PATCH 2502/4131] drm/amd/display: option to maximize lb usage
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>
---
drivers/gpu/drm/amd/display/dc/dc.h | 8 ++++++--
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c | 3 +++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 4899465..b60f491 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -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;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c
index 82b8887..fa2ab99 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp_dscl.c
@@ -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);
}
--
2.7.4
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