msm: camera: req_mgr: Update list_head to const

Starting with kernel 5.14+ callbacks using list_head structs need to
be const qualified.

CRs-Fixed: 3048249
Change-Id: I80611317b5a69fee8bb0901697d8a6df1bd4aab8
Signed-off-by: Karthik Jayakumar <kjayakum@codeaurora.org>

drivers/cam_utils/cam_compat.c

@@ -283,7 +283,24 @@ void cam_check_iommu_faults(struct iommu_domain *domain,
 }
 #endif
 
+static int inline cam_subdev_list_cmp(struct cam_subdev *entry_1, struct cam_subdev *entry_2)
+{
+	if (entry_1->close_seq_prior > entry_2->close_seq_prior)
+		return 1;
+	else if (entry_1->close_seq_prior < entry_2->close_seq_prior)
+		return -1;
+	else
+		return 0;
+}
+
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)
+int cam_req_mgr_ordered_list_cmp(void *priv,
+	const struct list_head *head_1, const struct list_head *head_2)
+{
+	return cam_subdev_list_cmp(list_entry(head_1, struct cam_subdev, list),
+		list_entry(head_2, struct cam_subdev, list));
+}
+
 int cam_get_ddr_type(void)
 {
 	/* We assume all chipsets running kernel version 5.15+
@@ -292,6 +309,13 @@ int cam_get_ddr_type(void)
 	return DDR_TYPE_LPDDR5;
 }
 #else
+int cam_req_mgr_ordered_list_cmp(void *priv,
+	struct list_head *head_1, struct list_head *head_2)
+{
+	return cam_subdev_list_cmp(list_entry(head_1, struct cam_subdev, list),
+		list_entry(head_2, struct cam_subdev, list));
+}
+
 int cam_get_ddr_type(void)
 {
 	return of_fdt_get_ddrtype();

drivers/cam_utils/cam_compat.h

@@ -11,6 +11,7 @@
 #include <linux/component.h>
 #include <linux/iommu.h>
 #include <linux/qcom_scm.h>
+#include <linux/list_sort.h>
 
 #include "cam_csiphy_dev.h"
 #include "cam_cpastop_hw.h"
@@ -47,4 +48,12 @@ void cam_check_iommu_faults(struct iommu_domain *domain,
 	struct cam_smmu_pf_info *pf_info);
 int cam_get_ddr_type(void);
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 15, 0)
+int cam_req_mgr_ordered_list_cmp(void *priv,
+	const struct list_head *head_1, const struct list_head *head_2);
+#else
+int cam_req_mgr_ordered_list_cmp(void *priv,
+	struct list_head *head_1, struct list_head *head_2);
+#endif
+
 #endif /* _CAM_COMPAT_H_ */