From 7b1179f4154ef473a62ddb4f878e956c41b5c71b Mon Sep 17 00:00:00 2001 From: Taylor R Campbell Date: Tue, 11 Jul 2023 17:09:57 +0000 Subject: [PATCH] amdgpu: Mark float-dependent variables volatile. This way they are computed -- using FP instructions -- before DC_FP_END, after which point FP instructions will trap or behave unpredictably. This is a workaround, not a proper solution -- really, the DC_FP_START/END calls should happen in a separate compilation unit built without -mhard-float or whatever, but that's a lot more work to make happen for now. XXX pullup-10 --- .../drm2/dist/drm/amd/display/dc/calcs/amdgpu_dcn_calcs.c | 6 +++--- .../dist/drm/amd/display/dc/dcn20/amdgpu_dcn20_resource.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/sys/external/bsd/drm2/dist/drm/amd/display/dc/calcs/amdgpu_dcn_calcs.c b/sys/external/bsd/drm2/dist/drm/amd/display/dc/calcs/amdgpu_dcn_calcs.c index 2a169acdc48d..d49a263fe57b 100644 --- a/sys/external/bsd/drm2/dist/drm/amd/display/dc/calcs/amdgpu_dcn_calcs.c +++ b/sys/external/bsd/drm2/dist/drm/amd/display/dc/calcs/amdgpu_dcn_calcs.c @@ -626,7 +626,7 @@ static void calc_wm_sets_and_perf_params( static bool dcn_bw_apply_registry_override(struct dc *dc) { - bool updated = false; + volatile bool updated = false; DC_FP_START(); if ((int)(dc->dcn_soc->sr_exit_time * 1000) != dc->debug.sr_exit_time_ns @@ -733,7 +733,7 @@ bool dcn_validate_bandwidth( struct dcn_bw_internal_vars *v = &context->dcn_bw_vars; int i, input_idx, k; int vesa_sync_start, asic_blank_end, asic_blank_start; - bool bw_limit_pass; + volatile bool bw_limit_pass; float bw_limit; PERFORMANCE_TRACE_START(); @@ -1502,7 +1502,7 @@ void dcn_bw_notify_pplib_of_wm_ranges(struct dc *dc) { struct pp_smu_funcs_rv *pp = NULL; struct pp_smu_wm_range_sets ranges = {0}; - int min_fclk_khz, min_dcfclk_khz, socclk_khz; + volatile int min_fclk_khz, min_dcfclk_khz, socclk_khz; const int overdrive = 5000000; /* 5 GHz to cover Overdrive */ if (dc->res_pool->pp_smu) diff --git a/sys/external/bsd/drm2/dist/drm/amd/display/dc/dcn20/amdgpu_dcn20_resource.c b/sys/external/bsd/drm2/dist/drm/amd/display/dc/dcn20/amdgpu_dcn20_resource.c index 24a02d9a2c2f..51074ed75e9f 100644 --- a/sys/external/bsd/drm2/dist/drm/amd/display/dc/dcn20/amdgpu_dcn20_resource.c +++ b/sys/external/bsd/drm2/dist/drm/amd/display/dc/dcn20/amdgpu_dcn20_resource.c @@ -2932,7 +2932,7 @@ validate_out: bool dcn20_validate_bandwidth(struct dc *dc, struct dc_state *context, bool fast_validate) { - bool voltage_supported = false; + volatile bool voltage_supported = false; bool full_pstate_supported = false; bool dummy_pstate_supported = false; double p_state_latency_us;