linux-kernel - [PATCH 4/5] drm/msm/a6xx: update a6xx_ucode_check

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Date:   Wed, 12 May 2021 20:37:48 -0400
From:   Jonathan Marek <jonathan@...ek.ca>
To:     freedreno@...ts.freedesktop.org
Cc:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Eric Anholt <eric@...olt.net>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        Sharat Masetty <smasetty@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 4/5] drm/msm/a6xx: update a6xx_ucode_check_version for a660

Accept all SQE firmware versions for A660.

Re-organize the function a bit and print an error message for unexpected
GPU IDs instead of failing silently.

Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 36 +++++++++++++--------------
 1 file changed, 17 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 4467273e66c0..261a20076f9d 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -541,6 +541,11 @@ static bool a6xx_ucode_check_version(struct a6xx_gpu *a6xx_gpu,
 	 * Targets up to a640 (a618, a630 and a640) need to check for a
 	 * microcode version that is patched to support the whereami opcode or
 	 * one that is new enough to include it by default.
+	 *
+	 * a650 tier targets don't need whereami but still need to be
+	 * equal to or newer than 0.95 for other security fixes
+	 *
+	 * a660 targets have all the critical security fixes from the start
 	 */
 	if (adreno_is_a618(adreno_gpu) || adreno_is_a630(adreno_gpu) ||
 		adreno_is_a640(adreno_gpu)) {
@@ -564,27 +569,20 @@ static bool a6xx_ucode_check_version(struct a6xx_gpu *a6xx_gpu,
 		DRM_DEV_ERROR(&gpu->pdev->dev,
 			"a630 SQE ucode is too old. Have version %x need at least %x\n",
 			buf[0] & 0xfff, 0x190);
-	}  else {
-		/*
-		 * a650 tier targets don't need whereami but still need to be
-		 * equal to or newer than 0.95 for other security fixes
-		 */
-		if (adreno_is_a650(adreno_gpu)) {
-			if ((buf[0] & 0xfff) >= 0x095) {
-				ret = true;
-				goto out;
-			}
-
-			DRM_DEV_ERROR(&gpu->pdev->dev,
-				"a650 SQE ucode is too old. Have version %x need at least %x\n",
-				buf[0] & 0xfff, 0x095);
+	} else if (adreno_is_a650(adreno_gpu)) {
+		if ((buf[0] & 0xfff) >= 0x095) {
+			ret = true;
+			goto out;
 		}
 
-		/*
-		 * When a660 is added those targets should return true here
-		 * since those have all the critical security fixes built in
-		 * from the start
-		 */
+		DRM_DEV_ERROR(&gpu->pdev->dev,
+			"a650 SQE ucode is too old. Have version %x need at least %x\n",
+			buf[0] & 0xfff, 0x095);
+	} else if (adreno_is_a660(adreno_gpu)) {
+		ret = true;
+	} else {
+		DRM_DEV_ERROR(&gpu->pdev->dev,
+			"unknown GPU, add it to a6xx_ucode_check_version()!!\n");
 	}
 out:
 	msm_gem_put_vaddr(obj);
-- 
2.26.1