diff options
| author | Jake Wang <haonan.wang2@amd.com> | 2021-09-22 14:22:59 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-10-19 17:17:16 -0400 |
| commit | 7a28bee067d524c1b8770aa72a82263eb9fc53f0 (patch) | |
| tree | 41b81484ce09ac39553ca230d09eadeb0d2f0a80 /drivers/gpu/drm | |
| parent | 652de07addd2c40684fbf3a91c5b335709a585ca (diff) | |
| download | linux-7a28bee067d524c1b8770aa72a82263eb9fc53f0.tar.bz2 | |
drm/amd/display: Disable dpp root clock when not being used
[Why & How]
Disable root clock for dpp when not being used.
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Agustin Gutierrez Sanchez <agustin.gutierrez@amd.com>
Signed-off-by: Jake Wang <haonan.wang2@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')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c | 41 |
2 files changed, 44 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c index d7bf9283dc90..3fae1f1f028d 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn31/dcn31_clk_mgr.c @@ -219,14 +219,17 @@ static void dcn31_update_clocks(struct clk_mgr *clk_mgr_base, update_dispclk = true; } - /* TODO: add back DTO programming when DPPCLK restore is fixed in FSDL*/ if (dpp_clock_lowered) { // increase per DPP DTO before lowering global dppclk + dcn20_update_clocks_update_dpp_dto(clk_mgr, context, safe_to_lower); dcn31_smu_set_dppclk(clk_mgr, clk_mgr_base->clks.dppclk_khz); } else { // increase global DPPCLK before lowering per DPP DTO if (update_dppclk || update_dispclk) dcn31_smu_set_dppclk(clk_mgr, clk_mgr_base->clks.dppclk_khz); + // 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, safe_to_lower); } // notify DMCUB of latest clocks diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c index 9896adf67425..582c500ecb49 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_dccg.c @@ -42,6 +42,45 @@ #define DC_LOGGER \ dccg->ctx->logger +static void dccg31_update_dpp_dto(struct dccg *dccg, int dpp_inst, int req_dppclk) +{ + struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); + + if (dccg->ref_dppclk && req_dppclk) { + int ref_dppclk = dccg->ref_dppclk; + int modulo, phase; + + // phase / modulo = dpp pipe clk / dpp global clk + modulo = 0xff; // use FF at the end + phase = ((modulo * req_dppclk) + ref_dppclk - 1) / ref_dppclk; + + if (phase > 0xff) { + ASSERT(false); + phase = 0xff; + } + + REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, + DPPCLK0_DTO_PHASE, phase, + DPPCLK0_DTO_MODULO, modulo); + REG_UPDATE(DPPCLK_DTO_CTRL, + DPPCLK_DTO_ENABLE[dpp_inst], 1); + } else { + //DTO must be enabled to generate a 0Hz clock output + if (dccg->ctx->dc->debug.root_clock_optimization.bits.dpp) { + REG_UPDATE(DPPCLK_DTO_CTRL, + DPPCLK_DTO_ENABLE[dpp_inst], 1); + REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, + DPPCLK0_DTO_PHASE, 0, + DPPCLK0_DTO_MODULO, 1); + } else { + REG_UPDATE(DPPCLK_DTO_CTRL, + DPPCLK_DTO_ENABLE[dpp_inst], 0); + } + } + dccg->pipe_dppclk_khz[dpp_inst] = req_dppclk; +} + + void dccg31_set_dpstreamclk( struct dccg *dccg, enum hdmistreamclk_source src, @@ -401,7 +440,7 @@ void dccg31_init(struct dccg *dccg) } static const struct dccg_funcs dccg31_funcs = { - .update_dpp_dto = dccg2_update_dpp_dto, + .update_dpp_dto = dccg31_update_dpp_dto, .get_dccg_ref_freq = dccg31_get_dccg_ref_freq, .dccg_init = dccg31_init, .set_dpstreamclk = dccg31_set_dpstreamclk, |