From: Nicholas Kazlauskas Date: Mon, 15 Jul 2024 19:52:46 +0000 (-0400) Subject: drm/amd/display: Request 0MHz dispclk for zero display case X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=fcb3a4fb8255149a73afeb3d8f2397eaac3a46b0;p=users%2Fjedix%2Flinux-maple.git drm/amd/display: Request 0MHz dispclk for zero display case [Why] If we aren't entering RCG/IPS2 or CLKSTOP is not supported by PMFW then we should be requesting a dispclk value of 0MHz to PMFW. Currenly we run at max clock since there's an assumption in APU clock table formulation where we can run at any DISPCLK at any state so the real clock value ends up as 1200Mhz - the maximum. [How] Set to 0 instead of the minimum value in the state array. Signed-off-by: Nicholas Kazlauskas Reviewed-by: Duncan Ma Tested-by: Daniel Wheeler Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.c b/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.c index d5dcc8b772816..866b0abcff1ba 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.c +++ b/drivers/gpu/drm/amd/display/dc/dml2/dml2_wrapper.c @@ -575,7 +575,7 @@ static bool dml2_validate_and_build_resource(const struct dc *in_dc, struct dc_s unsigned int lowest_state_idx = 0; out_clks.p_state_supported = true; - out_clks.dispclk_khz = (unsigned int)dml2->v20.dml_core_ctx.states.state_array[lowest_state_idx].dispclk_mhz * 1000; + out_clks.dispclk_khz = 0; /* No requirement, and lowest index will generally be maximum dispclk. */ out_clks.dcfclk_khz = (unsigned int)dml2->v20.dml_core_ctx.states.state_array[lowest_state_idx].dcfclk_mhz * 1000; out_clks.fclk_khz = (unsigned int)dml2->v20.dml_core_ctx.states.state_array[lowest_state_idx].fabricclk_mhz * 1000; out_clks.uclk_mts = (unsigned int)dml2->v20.dml_core_ctx.states.state_array[lowest_state_idx].dram_speed_mts;