Re: [Intel-gfx] [PATCH] drm/i915: Disable bonding on gen12+ platforms

[John Harrison]

On 7/28/2021 12:21, Matthew Brost wrote:

Disable bonding on gen12+ platforms aside from ones already supported by
the i915 - TGL, RKL, and ADL-S.

Signed-off-by: Matthew Brost <matthew.br...@intel.com>
---
  drivers/gpu/drm/i915/gem/i915_gem_context.c | 7 +++++++
  1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c 
b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index 05c3ee191710..9c3672bac0e2 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -446,6 +446,13 @@ set_proto_ctx_engines_bond(struct i915_user_extension 
__user *base, void *data)
        u16 idx, num_bonds;
        int err, n;

+ if (GRAPHICS_VER(i915) >= 12 && !IS_TIGERLAKE(i915) &&

+           !IS_ROCKETLAKE(i915) && !IS_ALDERLAKE_S(i915)) {
+               drm_dbg(&i915->drm,
+                       "Bonding on gen12+ aside from TGL, RKL, and ADL_S not 
allowed\n");

I would have said not supported rather than not allowed. Either way:
Reviewed-by: John Harrison <john.c.harri...@intel.com>

+               return -ENODEV;
+       }
+
        if (get_user(idx, &ext->virtual_index))
                return -EFAULT;