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Date: Thu, 9 Sep 2021 07:43:40 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Oliver Logush <oliver.logush@....com>, Rodrigo Siqueira <Rodrigo.Siqueira@....com>, Alex Deucher <alexander.deucher@....com>, Sasha Levin <sashal@...nel.org>, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org Subject: [PATCH AUTOSEL 5.13 044/219] drm/amd/display: Fix timer_per_pixel unit error From: Oliver Logush <oliver.logush@....com> [ Upstream commit 23e55639b87fb16a9f0f66032ecb57060df6c46c ] [why] The units of the time_per_pixel variable were incorrect, this had to be changed for the code to properly function. [how] The change was very straightforward, only required one line of code to be changed where the calculation was done. Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@....com> Signed-off-by: Oliver Logush <oliver.logush@....com> Signed-off-by: Alex Deucher <alexander.deucher@....com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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 81f583733fa8..12e92f620483 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c @@ -2461,7 +2461,7 @@ void dcn20_set_mcif_arb_params( wb_arb_params->cli_watermark[k] = get_wm_writeback_urgent(&context->bw_ctx.dml, pipes, pipe_cnt) * 1000; wb_arb_params->pstate_watermark[k] = get_wm_writeback_dram_clock_change(&context->bw_ctx.dml, pipes, pipe_cnt) * 1000; } - wb_arb_params->time_per_pixel = 16.0 / context->res_ctx.pipe_ctx[i].stream->phy_pix_clk; /* 4 bit fraction, ms */ + wb_arb_params->time_per_pixel = 16.0 * 1000 / (context->res_ctx.pipe_ctx[i].stream->phy_pix_clk / 1000); /* 4 bit fraction, ms */ wb_arb_params->slice_lines = 32; wb_arb_params->arbitration_slice = 2; wb_arb_params->max_scaled_time = dcn20_calc_max_scaled_time(wb_arb_params->time_per_pixel, -- 2.30.2
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