linux-kernel - [PATCH 5.15 031/230] drm/i915: Disable bonding on gen12+ platforms

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Message-Id: <20220711090604.961757355@linuxfoundation.org>
Date:   Mon, 11 Jul 2022 11:04:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Matthew Brost <matthew.brost@...el.com>,
        John Harrison <John.C.Harrison@...el.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Matt Roper <matthew.d.roper@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 031/230] drm/i915: Disable bonding on gen12+ platforms

From: Matthew Brost <matthew.brost@...el.com>

[ Upstream commit ce7e75c7ef1bf8ea3d947da8c674d2f40fd7d734 ]

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

Signed-off-by: Matthew Brost <matthew.brost@...el.com>
Reviewed-by: John Harrison <John.C.Harrison@...el.com>
Acked-by: Daniel Vetter <daniel.vetter@...ll.ch>
Signed-off-by: Matt Roper <matthew.d.roper@...el.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210728192100.132425-1-matthew.brost@intel.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 ee0c0b712522..ba2e037a82e4 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -442,6 +442,13 @@ 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 supported\n");
+		return -ENODEV;
+	}
+
 	if (get_user(idx, &ext->virtual_index))
 		return -EFAULT;
 
-- 
2.35.1