diff options
| author |   Alvin Lee <Alvin.Lee2@amd.com> | 2022-04-29 20:41:10 -0400 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2023-04-18 16:28:54 -0400 |
| commit | 128c1ca0303fe764a4cde5f761e72810d9e40b6e (patch) | |
| tree | 96df574b057e0e0f73e2845b3d5308940391eb69 | |
| parent | drm/amd/display: fix is_timing_changed() prototype (diff) | |
| download | wireguard-linux-128c1ca0303fe764a4cde5f761e72810d9e40b6e.tar.xz wireguard-linux-128c1ca0303fe764a4cde5f761e72810d9e40b6e.zip | |
drm/amd/display: Update DTBCLK for DCN32
[Why&How]
- Implement interface to program DTBCLK DTO’s
according to reference DTBCLK returned by PMFW
- This is required because DTO programming
requires exact DTBCLK reference freq or it could
result in underflow
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c index ea753f8fa175..2b8a81b6d53b 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c @@ -233,6 +233,32 @@ void dcn32_init_clocks(struct clk_mgr *clk_mgr_base) DC_FP_END(); } +static void dcn32_update_clocks_update_dtb_dto(struct clk_mgr_internal *clk_mgr, + struct dc_state *context, + int ref_dtbclk_khz) +{ + struct dccg *dccg = clk_mgr->dccg; + uint32_t tg_mask = 0; + int i; + + for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) { + struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i]; + struct dtbclk_dto_params dto_params = {0}; + + /* use mask to program DTO once per tg */ + if (pipe_ctx->stream_res.tg && + !(tg_mask & (1 << pipe_ctx->stream_res.tg->inst))) { + tg_mask |= (1 << pipe_ctx->stream_res.tg->inst); + + dto_params.otg_inst = pipe_ctx->stream_res.tg->inst; + dto_params.ref_dtbclk_khz = ref_dtbclk_khz; + + dccg->funcs->set_dtbclk_dto(clk_mgr->dccg, &dto_params); + //dccg->funcs->set_audio_dtbclk_dto(clk_mgr->dccg, &dto_params); + } + } +} + /* Since DPPCLK request to PMFW needs to be exact (due to DPP DTO programming), * update DPPCLK to be the exact frequency that will be set after the DPPCLK * divider is updated. This will prevent rounding issues that could cause DPP @@ -570,6 +596,7 @@ static void dcn32_update_clocks(struct clk_mgr *clk_mgr_base, /* DCCG requires KHz precision for DTBCLK */ clk_mgr_base->clks.ref_dtbclk_khz = dcn32_smu_set_hard_min_by_freq(clk_mgr, PPCLK_DTBCLK, khz_to_mhz_ceil(new_clocks->ref_dtbclk_khz)); + dcn32_update_clocks_update_dtb_dto(clk_mgr, context, clk_mgr_base->clks.ref_dtbclk_khz); } if (dc->config.forced_clocks == false || (force_reset && safe_to_lower)) { |