[PATCH 5.16 017/164] drm/amd/display: Protect update_bw_bounding_box FPU code.

Greg Kroah-Hartman
2022-02-28T18:01:00Z

From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

commit 1432108d00e42ffa383240bcac8d58f89ae19104 upstream.

For DCN3/3.01/3.02 at least these use the fpu.

v2: squash in build fix for when DCN is not enabled (Leo)

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c | 2 ++
drivers/gpu/drm/amd/display/dc/core/dc.c | 7 +++++--
2 files changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
@@ -437,8 +437,10 @@ static void dcn3_get_memclk_states_from_
clk_mgr_base->bw_params->clk_table.num_entries = num_levels ? num_levels : 1;

/* Refresh bounding box */
+ DC_FP_START();
clk_mgr_base->ctx->dc->res_pool->funcs->update_bw_bounding_box(
clk_mgr->base.ctx->dc, clk_mgr_base->bw_params);
+ DC_FP_END();
}

static bool dcn3_is_smu_present(struct clk_mgr *clk_mgr_base)
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -999,10 +999,13 @@ static bool dc_construct(struct dc *dc,
goto fail;
#ifdef CONFIG_DRM_AMD_DC_DCN
dc->clk_mgr->force_smu_not_present = init_params->force_smu_not_present;
-#endif

- if (dc->res_pool->funcs->update_bw_bounding_box)
+ if (dc->res_pool->funcs->update_bw_bounding_box) {
+ DC_FP_START();
dc->res_pool->funcs->update_bw_bounding_box(dc, dc->clk_mgr->bw_params);
+ DC_FP_END();
+ }
+#endif

/* Creation of current_state must occur after dc->dml
* is initialized in dc_create_resource_pool because