[PATCH 7.1 028/228] drm/amdgpu: read TRUNCATE_COORD_MODE on gfx12

7.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Qiang Yu <[email protected]>

commit 2d69604b4d0b9c0c0ac71624b5fafb36cf249729 upstream.

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 <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit 4261cbc7b03f1f56e95aeaf1492b8690fa5a253e)
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c |    5 +++++
 1 file changed, 5 insertions(+)

--- 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(str
 	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);