deinterlace: add api for free mirror mem [1/1]

PD#SWPL-9678

Problem:
di keep buf for mirror function till next reg

Solution:
1.add api(di_trig_free_mirror_mem) for free mirror mem
after unreg;
2. debug cmd:
echo free_mirror > /sys/class/deinterlace/di0/debug;

Verify:
G12A

Change-Id: If2e5ceb4266cf5df0b79997dbd16f5bd90220ef8
Signed-off-by: Jihong Sui <jihong.sui@amlogic.com>

diff --git a/drivers/amlogic/media/deinterlace/deinterlace.c b/drivers/amlogic/media/deinterlace/deinterlace.c
index 3197e21..4507828 100644 (file)
--- a/drivers/amlogic/media/deinterlace/deinterlace.c
+++ b/drivers/amlogic/media/deinterlace/deinterlace.c
@@ -116,6 +116,7 @@ static bool mc_mem_alloc;
 static unsigned int di_pre_rdma_enable;
 static struct mutex di_event_mutex;
 static atomic_t di_flag_unreg; //ary 2019-05-27
+static atomic_t di_trig_free_mem;
 
 static unsigned int di_force_bit_mode = 10;
 module_param(di_force_bit_mode, uint, 0664);
@@ -528,6 +529,42 @@ int get_di_dump_state_flag(void)
 {
        return dump_state_flag;
 }
+/********************************************
+ * function: for releas mirror mem
+ *     need call this after unreg di
+ ********************************************/
+void di_trig_free_mirror_mem(void)
+{
+       if (atomic_read(&di_flag_unreg)
+               && de_devp->flag_cma != 2
+               && de_devp->flag_cma != 0
+               && active_flag) {
+               atomic_set(&di_trig_free_mem, 1);
+               up(&di_sema);
+               di_pr_info("%s\n", __func__);
+       }
+}
+EXPORT_SYMBOL(di_trig_free_mirror_mem);
+static bool di_free_mem_pre(void)
+{
+
+       if (!atomic_read(&di_trig_free_mem))
+               return false;
+       if (di_pre_stru.cma_alloc_done)
+               return false;
+
+       if (!di_post_stru.keep_buf
+               || !atomic_read(&di_flag_unreg)) {
+               atomic_set(&di_trig_free_mem, 0);
+               return false;
+       }
+
+       /*free mirror memory*/
+       di_post_stru.keep_buf = NULL;
+
+       return true;
+}
+
 /*--------------------------*/
 
 static void parse_param_di(char *buf_orig, char **parm)
@@ -623,6 +660,8 @@ store_dbg(struct device *dev,
                dump_post_mif_reg();
        } else if (strncmp(buf, "recycle_buf", 11) == 0) {
                recycle_keep_buffer();
+       } else if (strncmp(buf, "free_mirror", 11) == 0) {
+               di_trig_free_mirror_mem();
        } else if (strncmp(buf, "recycle_post", 12) == 0) {
                if (di_vf_peek(NULL))
                        di_vf_put(di_vf_get(NULL), NULL);
@@ -6740,6 +6779,11 @@ static int di_task_handle(void *data)
                                di_pre_stru.cma_alloc_req = 0;
                                di_pre_stru.cma_alloc_done = 1;
                        }
+                       if (di_free_mem_pre()) {
+                               di_cma_release(devp);
+                               di_pr_info("release mirror\n");
+                               atomic_set(&di_trig_free_mem, 0);
+                       }
                        /* mutex_unlock(&de_devp->cma_mutex); */
                        #endif
                }