From: Qiang Yu Date: Thu, 23 Jul 2026 09:20:47 +0000 (+0800) Subject: drm/amdgpu: read TRUNCATE_COORD_MODE on gfx12 X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=2d69604b4d0b9c0c0ac71624b5fafb36cf249729;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu: read TRUNCATE_COORD_MODE on gfx12 TA_CNTL2.TRUNCATE_COORD_MODE selects whether texture coordinate truncation is D3D9/GL/Vulkan conformant. gfx11 reads it and reports it to userspace via AMDGPU_IDS_FLAGS_CONFORMANT_TRUNC_COORD, but gfx12 never read it, so the flag was always reported as 0 and userspace fell back to the non-conformant path. Read it in gfx_v12_0_constants_init() like gfx11 does. Fixes: 52cb80c12e8a ("drm/amdgpu: Add gfx v12_0 ip block support (v6)") Signed-off-by: Qiang Yu Reviewed-by: Marek Olšák Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher (cherry picked from commit 4261cbc7b03f1f56e95aeaf1492b8690fa5a253e) Cc: stable@vger.kernel.org --- diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c index da668a8d6abd..9d7a75670bee 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c @@ -1823,6 +1823,11 @@ static void gfx_v12_0_constants_init(struct amdgpu_device *adev) gfx_v12_0_get_tcc_info(adev); adev->gfx.config.pa_sc_tile_steering_override = 0; + /* Set whether texture coordinate truncation is conformant. */ + tmp = RREG32_SOC15(GC, 0, regTA_CNTL2); + adev->gfx.config.ta_cntl2_truncate_coord_mode = + REG_GET_FIELD(tmp, TA_CNTL2, TRUNCATE_COORD_MODE); + /* XXX SH_MEM regs */ /* where to put LDS, scratch, GPUVM in FSA64 space */ mutex_lock(&adev->srbm_mutex);