[PATCH 5.13 074/127] drm/amd/display: Use DCN30 watermark calc for DCN301

Sasha Levin
2021-08-24T17:01:08Z

From: Zhan Liu <zhan.liu@amd.com>

[ Upstream commit 37717b8c9f0e8c4dd73fc522769cc14649b4f657 ]

[why]
dcn301_calculate_wm_and_dl() causes flickering when external monitor is
connected.

This issue has been fixed before by commit 0e4c0ae59d7e
("drm/amdgpu/display: drop dcn301_calculate_wm_and_dl for now"), however
part of the fix was gone after commit 2cbcb78c9ee5 ("Merge tag 'amd-drm-next-5.13-2021-03-23' of https://gitlab.freedesktop.org/agd5f/linux into drm-next").

[how]
Use dcn30_calculate_wm_and_dlg() instead as in the original fix.

Fixes: 2cbcb78c9ee5 ("Merge tag 'amd-drm-next-5.13-2021-03-23' of https://gitlab.freedesktop.org/agd5f/linux into drm-next")

Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Zhan Liu <zhan.liu@amd.com>
Tested-by: Zhan Liu <zhan.liu@amd.com>
Tested-by: Oliver Logush <oliver.logush@amd.com>
Signed-off-by: Zhan Liu <zhan.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../amd/display/dc/dcn301/dcn301_resource.c | 96 +------------------
1 file changed, 1 insertion(+), 95 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
index 472696f949ac..63b09c1124c4 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_resource.c
@@ -1622,106 +1622,12 @@ static void dcn301_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *b
dml_init_instance(&dc->dml, &dcn3_01_soc, &dcn3_01_ip, DML_PROJECT_DCN30);
}

-static void calculate_wm_set_for_vlevel(
- int vlevel,
- struct wm_range_table_entry *table_entry,
- struct dcn_watermarks *wm_set,
- struct display_mode_lib *dml,
- display_e2e_pipe_params_st *pipes,
- int pipe_cnt)
-{
- double dram_clock_change_latency_cached = dml->soc.dram_clock_change_latency_us;
-
- ASSERT(vlevel < dml->soc.num_states);
- /* only pipe 0 is read for voltage and dcf/soc clocks */
- pipes[0].clks_cfg.voltage = vlevel;
- pipes[0].clks_cfg.dcfclk_mhz = dml->soc.clock_limits[vlevel].dcfclk_mhz;
- pipes[0].clks_cfg.socclk_mhz = dml->soc.clock_limits[vlevel].socclk_mhz;
-
- dml->soc.dram_clock_change_latency_us = table_entry->pstate_latency_us;
- dml->soc.sr_exit_time_us = table_entry->sr_exit_time_us;
- dml->soc.sr_enter_plus_exit_time_us = table_entry->sr_enter_plus_exit_time_us;
-
- wm_set->urgent_ns = get_wm_urgent(dml, pipes, pipe_cnt) * 1000;
- wm_set->cstate_pstate.cstate_enter_plus_exit_ns = get_wm_stutter_enter_exit(dml, pipes, pipe_cnt) * 1000;
- wm_set->cstate_pstate.cstate_exit_ns = get_wm_stutter_exit(dml, pipes, pipe_cnt) * 1000;
- wm_set->cstate_pstate.pstate_change_ns = get_wm_dram_clock_change(dml, pipes, pipe_cnt) * 1000;
- wm_set->pte_meta_urgent_ns = get_wm_memory_trip(dml, pipes, pipe_cnt) * 1000;
- wm_set->frac_urg_bw_nom = get_fraction_of_urgent_bandwidth(dml, pipes, pipe_cnt) * 1000;
- wm_set->frac_urg_bw_flip = get_fraction_of_urgent_bandwidth_imm_flip(dml, pipes, pipe_cnt) * 1000;
- wm_set->urgent_latency_ns = get_urgent_latency(dml, pipes, pipe_cnt) * 1000;
- dml->soc.dram_clock_change_latency_us = dram_clock_change_latency_cached;
-
-}
-
-static void dcn301_calculate_wm_and_dlg(
- struct dc *dc, struct dc_state *context,
- display_e2e_pipe_params_st *pipes,
- int pipe_cnt,
- int vlevel_req)
-{
- int i, pipe_idx;
- int vlevel, vlevel_max;
- struct wm_range_table_entry *table_entry;
- struct clk_bw_params *bw_params = dc->clk_mgr->bw_params;
-
- ASSERT(bw_params);
-
- vlevel_max = bw_params->clk_table.num_entries - 1;
-
- /* WM Set D */
- table_entry = &bw_params->wm_table.entries[WM_D];
- if (table_entry->wm_type == WM_TYPE_RETRAINING)
- vlevel = 0;
- else
- vlevel = vlevel_max;
- calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.d,
- &context->bw_ctx.dml, pipes, pipe_cnt);
- /* WM Set C */
- table_entry = &bw_params->wm_table.entries[WM_C];
- vlevel = min(max(vlevel_req, 2), vlevel_max);
- calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.c,
- &context->bw_ctx.dml, pipes, pipe_cnt);
- /* WM Set B */
- table_entry = &bw_params->wm_table.entries[WM_B];
- vlevel = min(max(vlevel_req, 1), vlevel_max);
- calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.b,
- &context->bw_ctx.dml, pipes, pipe_cnt);
-
- /* WM Set A */
- table_entry = &bw_params->wm_table.entries[WM_A];
- vlevel = min(vlevel_req, vlevel_max);
- calculate_wm_set_for_vlevel(vlevel, table_entry, &context->bw_ctx.bw.dcn.watermarks.a,
- &context->bw_ctx.dml, pipes, pipe_cnt);
-
- for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
- if (!context->res_ctx.pipe_ctx[i].stream)
- continue;
-
- pipes[pipe_idx].clks_cfg.dispclk_mhz = get_dispclk_calculated(&context->bw_ctx.dml, pipes, pipe_cnt);
- pipes[pipe_idx].clks_cfg.dppclk_mhz = get_dppclk_calculated(&context->bw_ctx.dml, pipes, pipe_cnt, pipe_idx);
-
- if (dc->config.forced_clocks) {
- pipes[pipe_idx].clks_cfg.dispclk_mhz = context->bw_ctx.dml.soc.clock_limits[0].dispclk_mhz;
- pipes[pipe_idx].clks_cfg.dppclk_mhz = context->bw_ctx.dml.soc.clock_limits[0].dppclk_mhz;
- }
- if (dc->debug.min_disp_clk_khz > pipes[pipe_idx].clks_cfg.dispclk_mhz * 1000)
- pipes[pipe_idx].clks_cfg.dispclk_mhz = dc->debug.min_disp_clk_khz / 1000.0;
- if (dc->debug.min_dpp_clk_khz > pipes[pipe_idx].clks_cfg.dppclk_mhz * 1000)
- pipes[pipe_idx].clks_cfg.dppclk_mhz = dc->debug.min_dpp_clk_khz / 1000.0;
-
- pipe_idx++;
- }
-
- dcn20_calculate_dlg_params(dc, context, pipes, pipe_cnt, vlevel);
-}
-
static struct resource_funcs dcn301_res_pool_funcs = {
.destroy = dcn301_destroy_resource_pool,
.link_enc_create = dcn301_link_encoder_create,
.panel_cntl_create = dcn301_panel_cntl_create,
.validate_bandwidth = dcn30_validate_bandwidth,
- .calculate_wm_and_dlg = dcn301_calculate_wm_and_dlg,
+ .calculate_wm_and_dlg = dcn30_calculate_wm_and_dlg,
.update_soc_for_wm_a = dcn30_update_soc_for_wm_a,
.populate_dml_pipes = dcn30_populate_dml_pipes_from_context,
.acquire_idle_pipe_for_layer = dcn20_acquire_idle_pipe_for_layer,
--
2.30.2