From: Alvin Lee <alvin.lee2@xxxxxxx> [Why] According to HW team, PG is dropped for NV12, but programming the registers will still cause power to be consumed, so don't program for NV12. [How] Set function pointer to NULL if NV12 Signed-off-by: Alvin Lee <alvin.lee2@xxxxxxx> Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> Acked-by: Harry Wentland <harry.wentland@xxxxxxx> --- .../gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 7 ++++--- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 9 +++++++++ 2 files changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index 5f56cc13d6dc..113ff6731902 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -1268,7 +1268,8 @@ void dcn10_init_hw(struct dc *dc) } //Enable ability to power gate / don't force power on permanently - hws->funcs.enable_power_gating_plane(hws, true); + if (hws->funcs.enable_power_gating_plane) + hws->funcs.enable_power_gating_plane(hws, true); return; } @@ -1378,8 +1379,8 @@ void dcn10_init_hw(struct dc *dc) REG_UPDATE(DCFCLK_CNTL, DCFCLK_GATE_DIS, 0); } - - hws->funcs.enable_power_gating_plane(dc->hwseq, true); + if (hws->funcs.enable_power_gating_plane) + hws->funcs.enable_power_gating_plane(dc->hwseq, true); if (dc->clk_mgr->funcs->notify_wm_ranges) dc->clk_mgr->funcs->notify_wm_ranges(dc->clk_mgr); diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c index 1061faccec9c..080d4581a93d 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -3760,6 +3760,15 @@ static bool dcn20_resource_construct( dcn20_hw_sequencer_construct(dc); + // IF NV12, set PG function pointer to NULL. It's not that + // PG isn't supported for NV12, it's that we don't want to + // program the registers because that will cause more power + // to be consumed. We could have created dcn20_init_hw to get + // the same effect by checking ASIC rev, but there was a + // request at some point to not check ASIC rev on hw sequencer. + if (ASICREV_IS_NAVI12_P(dc->ctx->asic_id.hw_internal_rev)) + dc->hwseq->funcs.enable_power_gating_plane = NULL; + dc->caps.max_planes = pool->base.pipe_count; for (i = 0; i < dc->caps.max_planes; ++i) -- 2.25.0 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
