linux-kernel - [PATCH 5.18 051/231] drm/i915/guc: ADL-N should use the same GuC FW as ADL-S

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Date:   Tue, 19 Jul 2022 13:52:16 +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, John Harrison <John.C.Harrison@...el.com>,
        Tejas Upadhyay <tejas.upadhyay@...el.com>,
        Anusha Srivatsa <anusha.srivatsa@...el.com>,
        Jani Nikula <jani.nikula@...el.com>,
        Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>,
        Matt Roper <matthew.d.roper@...el.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 051/231] drm/i915/guc: ADL-N should use the same GuC FW as ADL-S

From: Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>

[ Upstream commit 25c95bf494067f7bd1dfa8064ef964abe88cafc2 ]

The only difference between the ADL S and P GuC FWs is the HWConfig
support. ADL-N does not support HWConfig, so we should use the same
binary as ADL-S, otherwise the GuC might attempt to fetch a config
table that does not exist. ADL-N is internally identified as an ADL-P,
so we need to special-case it in the FW selection code.

Fixes: 7e28d0b26759 ("drm/i915/adl-n: Enable ADL-N platform")
Cc: John Harrison <John.C.Harrison@...el.com>
Cc: Tejas Upadhyay <tejas.upadhyay@...el.com>
Cc: Anusha Srivatsa <anusha.srivatsa@...el.com>
Cc: Jani Nikula <jani.nikula@...el.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@...el.com>
Reviewed-by: Matt Roper <matthew.d.roper@...el.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220621233005.3952293-1-daniele.ceraolospurio@intel.com
(cherry picked from commit 971e4a9781742aaad1587e25fd5582b2dd595ef8)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
index 9b6fbad47646..097b0c8b8531 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
@@ -160,6 +160,15 @@ __uc_fw_auto_select(struct drm_i915_private *i915, struct intel_uc_fw *uc_fw)
 	u8 rev = INTEL_REVID(i915);
 	int i;
 
+	/*
+	 * The only difference between the ADL GuC FWs is the HWConfig support.
+	 * ADL-N does not support HWConfig, so we should use the same binary as
+	 * ADL-S, otherwise the GuC might attempt to fetch a config table that
+	 * does not exist.
+	 */
+	if (IS_ADLP_N(i915))
+		p = INTEL_ALDERLAKE_S;
+
 	GEM_BUG_ON(uc_fw->type >= ARRAY_SIZE(blobs_all));
 	fw_blobs = blobs_all[uc_fw->type].blobs;
 	fw_count = blobs_all[uc_fw->type].count;
-- 
2.35.1