diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c index 25d7b7c6681c..495f01e9f2ca 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c @@ -27,6 +27,7 @@ #include "clk_mgr_internal.h" #include "dce100/dce_clk_mgr.h" +#include "dcn20_clk_mgr.h" #include "reg_helper.h" #include "core_types.h" #include "dm_helpers.h" @@ -100,13 +101,13 @@ uint32_t dentist_get_did_from_divider(int divider) } void dcn20_update_clocks_update_dpp_dto(struct clk_mgr_internal *clk_mgr, - struct dc_state *context) + struct dc_state *context, bool safe_to_lower) { int i; clk_mgr->dccg->ref_dppclk = clk_mgr->base.clks.dppclk_khz; for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) { - int dpp_inst, dppclk_khz; + int dpp_inst, dppclk_khz, prev_dppclk_khz; /* Loop index will match dpp->inst if resource exists, * and we want to avoid dependency on dpp object @@ -114,8 +115,12 @@ void dcn20_update_clocks_update_dpp_dto(struct clk_mgr_internal *clk_mgr, dpp_inst = i; dppclk_khz = context->res_ctx.pipe_ctx[i].plane_res.bw.dppclk_khz; - clk_mgr->dccg->funcs->update_dpp_dto( - clk_mgr->dccg, dpp_inst, dppclk_khz); + prev_dppclk_khz = clk_mgr->base.ctx->dc->current_state->res_ctx.pipe_ctx[i].plane_res.bw.dppclk_khz; + + if (safe_to_lower || prev_dppclk_khz < dppclk_khz) { + clk_mgr->dccg->funcs->update_dpp_dto( + clk_mgr->dccg, dpp_inst, dppclk_khz); + } } } @@ -161,6 +166,9 @@ void dcn2_update_clocks(struct clk_mgr *clk_mgr_base, dc->debug.force_clock_mode & 0x1) { //this is from resume or boot up, if forced_clock cfg option used, we bypass program dispclk and DPPCLK, but need set them for S3. force_reset = true; + + dcn2_read_clocks_from_hw_dentist(clk_mgr_base); + //force_clock_mode 0x1: force reset the clock even it is the same clock as long as it is in Passive level. } display_count = clk_mgr_helper_get_active_display_cnt(dc, context); @@ -240,7 +248,7 @@ void dcn2_update_clocks(struct clk_mgr *clk_mgr_base, if (dc->config.forced_clocks == false || (force_reset && safe_to_lower)) { if (dpp_clock_lowered) { // if clock is being lowered, increase DTO before lowering refclk - dcn20_update_clocks_update_dpp_dto(clk_mgr, context); + dcn20_update_clocks_update_dpp_dto(clk_mgr, context, safe_to_lower); dcn20_update_clocks_update_dentist(clk_mgr); } else { // if clock is being raised, increase refclk before lowering DTO @@ -248,7 +256,7 @@ void dcn2_update_clocks(struct clk_mgr *clk_mgr_base, dcn20_update_clocks_update_dentist(clk_mgr); // always update dtos unless clock is lowered and not safe to lower if (new_clocks->dppclk_khz >= dc->current_state->bw_ctx.bw.dcn.clk.dppclk_khz) - dcn20_update_clocks_update_dpp_dto(clk_mgr, context); + dcn20_update_clocks_update_dpp_dto(clk_mgr, context, safe_to_lower); } } @@ -339,6 +347,32 @@ void dcn2_enable_pme_wa(struct clk_mgr *clk_mgr_base) } } + +void dcn2_read_clocks_from_hw_dentist(struct clk_mgr *clk_mgr_base) +{ + struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base); + uint32_t dispclk_wdivider; + uint32_t dppclk_wdivider; + int disp_divider; + int dpp_divider; + + REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DISPCLK_WDIVIDER, &dispclk_wdivider); + REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPPCLK_WDIVIDER, &dppclk_wdivider); + + disp_divider = dentist_get_divider_from_did(dispclk_wdivider); + dpp_divider = dentist_get_divider_from_did(dispclk_wdivider); + + if (disp_divider && dpp_divider) { + /* Calculate the current DFS clock, in kHz.*/ + clk_mgr_base->clks.dispclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR + * clk_mgr->base.dentist_vco_freq_khz) / disp_divider; + + clk_mgr_base->clks.dppclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR + * clk_mgr->base.dentist_vco_freq_khz) / dpp_divider; + } + +} + void dcn2_get_clock(struct clk_mgr *clk_mgr, struct dc_state *context, enum dc_clock_type clock_type, |