diff options
author | Hugo Hu <hugo.hu@amd.com> | 2021-04-21 14:23:44 +0800 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2021-05-19 22:38:24 -0400 |
commit | 132c894e93f18cf3b943753063bb0fd6ca8483ac (patch) | |
tree | b0d7de24b8ad08b484700a823ae1c04edaddca6e /drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | |
parent | 5709121a58a21e0bbde362536ec456f1a64c4ec4 (diff) |
drm/amd/display: treat memory as a single-channel for asymmetric memory V3
Previous patch caused crash and had been reverted. This patch
addresses the issue without regression.
[Why]
1. Driver use umachannelnumber to calculate watermarks for stutter.
In asymmetric memory config, the actual bandwidth is less than
dual-channel. The bandwidth should be the same as single-channel.
2. We found single rank dimm need additional delay time for stutter.
[How]
Get information from each DIMM. Treat memory config as a single-channel
for asymmetric memory in bandwidth calculating.
Add additional delay time for single rank dimm.
Signed-off-by: Hugo Hu <hugo.hu@amd.com>
Reviewed-by: Sung Lee <Sung.Lee@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c index f965914ea57c..416a24db17a9 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c @@ -761,6 +761,43 @@ static struct wm_table ddr4_wm_table_rn = { } }; +static struct wm_table ddr4_1R_wm_table_rn = { + .entries = { + { + .wm_inst = WM_A, + .wm_type = WM_TYPE_PSTATE_CHG, + .pstate_latency_us = 11.72, + .sr_exit_time_us = 13.90, + .sr_enter_plus_exit_time_us = 14.80, + .valid = true, + }, + { + .wm_inst = WM_B, + .wm_type = WM_TYPE_PSTATE_CHG, + .pstate_latency_us = 11.72, + .sr_exit_time_us = 13.90, + .sr_enter_plus_exit_time_us = 14.80, + .valid = true, + }, + { + .wm_inst = WM_C, + .wm_type = WM_TYPE_PSTATE_CHG, + .pstate_latency_us = 11.72, + .sr_exit_time_us = 13.90, + .sr_enter_plus_exit_time_us = 14.80, + .valid = true, + }, + { + .wm_inst = WM_D, + .wm_type = WM_TYPE_PSTATE_CHG, + .pstate_latency_us = 11.72, + .sr_exit_time_us = 13.90, + .sr_enter_plus_exit_time_us = 14.80, + .valid = true, + }, + } +}; + static struct wm_table lpddr4_wm_table_rn = { .entries = { { @@ -971,8 +1008,12 @@ void rn_clk_mgr_construct( } else { if (is_green_sardine) rn_bw_params.wm_table = ddr4_wm_table_gs; - else - rn_bw_params.wm_table = ddr4_wm_table_rn; + else { + if (ctx->dc->config.is_single_rank_dimm) + rn_bw_params.wm_table = ddr4_1R_wm_table_rn; + else + rn_bw_params.wm_table = ddr4_wm_table_rn; + } } /* Saved clocks configured at boot for debug purposes */ rn_dump_clk_registers(&clk_mgr->base.boot_snapshot, &clk_mgr->base, &log_info); @@ -990,6 +1031,9 @@ void rn_clk_mgr_construct( if (status == PP_SMU_RESULT_OK && ctx->dc_bios && ctx->dc_bios->integrated_info) { rn_clk_mgr_helper_populate_bw_params (clk_mgr->base.bw_params, &clock_table, ctx->dc_bios->integrated_info); + /* treat memory config as single channel if memory is asymmetrics. */ + if (ctx->dc->config.is_asymmetric_memory) + clk_mgr->base.bw_params->num_channels = 1; } } |