Merge tag 'drm-misc-next-fixes-2024-07-19' of...

Merge tag 'drm-misc-next-fixes-2024-07-19' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

Two fixes for v3d to fix an array indexing on newer V3D revisions.
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240719-emerald-newt-of-skill-89b54a@houat

drivers/gpu/drm/v3d/v3d_drv.c

@@ -265,7 +265,7 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
 	struct v3d_dev *v3d;
 	int ret;
 	u32 mmu_debug;
-	u32 ident1;
+	u32 ident1, ident3;
 	u64 mask;
 
 	v3d = devm_drm_dev_alloc(dev, &v3d_drm_driver, struct v3d_dev, drm);
@@ -298,6 +298,9 @@ static int v3d_platform_drm_probe(struct platform_device *pdev)
 	v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
 	WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
 
+	ident3 = V3D_READ(V3D_HUB_IDENT3);
+	v3d->rev = V3D_GET_FIELD(ident3, V3D_HUB_IDENT3_IPREV);
+
 	if (v3d->ver >= 71)
 		v3d->max_counters = V3D_V71_NUM_PERFCOUNTERS;
 	else if (v3d->ver >= 42)

drivers/gpu/drm/v3d/v3d_drv.h

@@ -98,10 +98,12 @@ struct v3d_perfmon {
 struct v3d_dev {
 	struct drm_device drm;
 
-	/* Short representation (e.g. 33, 41) of the V3D tech version
-	 * and revision.
-	 */
+	/* Short representation (e.g. 33, 41) of the V3D tech version */
 	int ver;
+
+	/* Short representation (e.g. 5, 6) of the V3D tech revision */
+	int rev;
+
 	bool single_irq_line;
 
 	/* Different revisions of V3D have different total number of performance

drivers/gpu/drm/v3d/v3d_sched.c

@@ -331,7 +331,8 @@ v3d_rewrite_csd_job_wg_counts_from_indirect(struct v3d_cpu_job *job)
 	struct v3d_bo *bo = to_v3d_bo(job->base.bo[0]);
 	struct v3d_bo *indirect = to_v3d_bo(indirect_csd->indirect);
 	struct drm_v3d_submit_csd *args = &indirect_csd->job->args;
-	u32 *wg_counts;
+	struct v3d_dev *v3d = job->base.v3d;
+	u32 num_batches, *wg_counts;
 
 	v3d_get_bo_vaddr(bo);
 	v3d_get_bo_vaddr(indirect);
@@ -344,8 +345,17 @@ v3d_rewrite_csd_job_wg_counts_from_indirect(struct v3d_cpu_job *job)
 	args->cfg[0] = wg_counts[0] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
 	args->cfg[1] = wg_counts[1] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
 	args->cfg[2] = wg_counts[2] << V3D_CSD_CFG012_WG_COUNT_SHIFT;
-	args->cfg[4] = DIV_ROUND_UP(indirect_csd->wg_size, 16) *
-		       (wg_counts[0] * wg_counts[1] * wg_counts[2]) - 1;
+
+	num_batches = DIV_ROUND_UP(indirect_csd->wg_size, 16) *
+		      (wg_counts[0] * wg_counts[1] * wg_counts[2]);
+
+	/* V3D 7.1.6 and later don't subtract 1 from the number of batches */
+	if (v3d->ver < 71 || (v3d->ver == 71 && v3d->rev < 6))
+		args->cfg[4] = num_batches - 1;
+	else
+		args->cfg[4] = num_batches;
+
+	WARN_ON(args->cfg[4] == ~0);
 
 	for (int i = 0; i < 3; i++) {
 		/* 0xffffffff indicates that the uniform rewrite is not needed */