[media] s5p-mfc: optimized code related to working contextes

All code setting/clearing working context bits has been moved
to separate functions. set_bit/clear_bit have been replaced by
non-atomic variants - variable is already guarded by spin_lock.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 60 insertions, 62 deletions

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 776e6bc241f..4486a234053 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -41,16 +41,49 @@ module_param(debug, int, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Debug level - higher value produces more verbose messages");
 
 /* Helper functions for interrupt processing */
+
 /* Remove from hw execution round robin */
-static void clear_work_bit(struct s5p_mfc_ctx *ctx)
+void clear_work_bit(struct s5p_mfc_ctx *ctx)
 {
 	struct s5p_mfc_dev *dev = ctx->dev;
 
 	spin_lock(&dev->condlock);
-	clear_bit(ctx->num, &dev->ctx_work_bits);
+	__clear_bit(ctx->num, &dev->ctx_work_bits);
 	spin_unlock(&dev->condlock);
 }
 
+/* Add to hw execution round robin */
+void set_work_bit(struct s5p_mfc_ctx *ctx)
+{
+	struct s5p_mfc_dev *dev = ctx->dev;
+
+	spin_lock(&dev->condlock);
+	__set_bit(ctx->num, &dev->ctx_work_bits);
+	spin_unlock(&dev->condlock);
+}
+
+/* Remove from hw execution round robin */
+void clear_work_bit_irqsave(struct s5p_mfc_ctx *ctx)
+{
+	struct s5p_mfc_dev *dev = ctx->dev;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->condlock, flags);
+	__clear_bit(ctx->num, &dev->ctx_work_bits);
+	spin_unlock_irqrestore(&dev->condlock, flags);
+}
+
+/* Add to hw execution round robin */
+void set_work_bit_irqsave(struct s5p_mfc_ctx *ctx)
+{
+	struct s5p_mfc_dev *dev = ctx->dev;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->condlock, flags);
+	__set_bit(ctx->num, &dev->ctx_work_bits);
+	spin_unlock_irqrestore(&dev->condlock, flags);
+}
+
 /* Wake up context wait_queue */
 static void wake_up_ctx(struct s5p_mfc_ctx *ctx, unsigned int reason,
 			unsigned int err)
@@ -504,9 +537,7 @@ static void s5p_mfc_handle_init_buffers(struct s5p_mfc_ctx *ctx,
 	ctx->int_type = reason;
 	ctx->int_err = err;
 	ctx->int_cond = 1;
-	spin_lock(&dev->condlock);
-	clear_bit(ctx->num, &dev->ctx_work_bits);
-	spin_unlock(&dev->condlock);
+	clear_work_bit(ctx);
 	if (err == 0) {
 		ctx->state = MFCINST_RUNNING;
 		if (!ctx->dpb_flush_flag) {
@@ -681,7 +712,6 @@ static int s5p_mfc_open(struct file *file)
 	struct s5p_mfc_dev *dev = video_drvdata(file);
 	struct s5p_mfc_ctx *ctx = NULL;
 	struct vb2_queue *q;
-	unsigned long flags;
 	int ret = 0;
 
 	mfc_debug_enter();
@@ -714,9 +744,7 @@ static int s5p_mfc_open(struct file *file)
 		}
 	}
 	/* Mark context as idle */
-	spin_lock_irqsave(&dev->condlock, flags);
-	clear_bit(ctx->num, &dev->ctx_work_bits);
-	spin_unlock_irqrestore(&dev->condlock, flags);
+	clear_work_bit_irqsave(ctx);
 	dev->ctx[ctx->num] = ctx;
 	if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
 		ctx->type = MFCINST_DECODER;
@@ -843,7 +871,6 @@ static int s5p_mfc_release(struct file *file)
 {
 	struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data);
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned long flags;
 
 	mfc_debug_enter();
 	mutex_lock(&dev->mfc_mutex);
@@ -851,17 +878,13 @@ static int s5p_mfc_release(struct file *file)
 	vb2_queue_release(&ctx->vq_src);
 	vb2_queue_release(&ctx->vq_dst);
 	/* Mark context as idle */
-	spin_lock_irqsave(&dev->condlock, flags);
-	clear_bit(ctx->num, &dev->ctx_work_bits);
-	spin_unlock_irqrestore(&dev->condlock, flags);
+	clear_work_bit_irqsave(ctx);
 	/* If instance was initialised then
 	 * return instance and free reosurces */
 	if (ctx->inst_no != MFC_NO_INSTANCE_SET) {
 		mfc_debug(2, "Has to free instance\n");
 		ctx->state = MFCINST_RETURN_INST;
-		spin_lock_irqsave(&dev->condlock, flags);
-		set_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock_irqrestore(&dev->condlock, flags);
+		set_work_bit_irqsave(ctx);
 		s5p_mfc_clean_ctx_int_flags(ctx);
 		s5p_mfc_try_run(dev);
 		/* Wait until instance is returned or timeout occured */
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_common.h b/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
index 8871f0de6ef..519b0d66d8d 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
@@ -570,4 +570,9 @@ struct mfc_control {
 #define ctrl_to_ctx(__ctrl) \
 	container_of((__ctrl)->handler, struct s5p_mfc_ctx, ctrl_handler)
 
+void clear_work_bit(struct s5p_mfc_ctx *ctx);
+void set_work_bit(struct s5p_mfc_ctx *ctx);
+void clear_work_bit_irqsave(struct s5p_mfc_ctx *ctx);
+void set_work_bit_irqsave(struct s5p_mfc_ctx *ctx);
+
 #endif /* S5P_MFC_COMMON_H_ */
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index aef83d13182..6ee21bb7139 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -415,7 +415,6 @@ static int vidioc_reqbufs(struct file *file, void *priv,
 	struct s5p_mfc_dev *dev = video_drvdata(file);
 	struct s5p_mfc_ctx *ctx = fh_to_ctx(priv);
 	int ret = 0;
-	unsigned long flags;
 
 	if (reqbufs->memory != V4L2_MEMORY_MMAP) {
 		mfc_err("Only V4L2_MEMORY_MAP is supported\n");
@@ -497,11 +496,8 @@ static int vidioc_reqbufs(struct file *file, void *priv,
 			s5p_mfc_clock_off();
 			return -ENOMEM;
 		}
-		if (s5p_mfc_ctx_ready(ctx)) {
-			spin_lock_irqsave(&dev->condlock, flags);
-			set_bit(ctx->num, &dev->ctx_work_bits);
-			spin_unlock_irqrestore(&dev->condlock, flags);
-		}
+		if (s5p_mfc_ctx_ready(ctx))
+			set_work_bit_irqsave(ctx);
 		s5p_mfc_try_run(dev);
 		s5p_mfc_wait_for_done_ctx(ctx,
 					 S5P_FIMV_R2H_CMD_INIT_BUFFERS_RET, 0);
@@ -576,7 +572,6 @@ static int vidioc_streamon(struct file *file, void *priv,
 {
 	struct s5p_mfc_ctx *ctx = fh_to_ctx(priv);
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned long flags;
 	int ret = -EINVAL;
 
 	mfc_debug_enter();
@@ -589,9 +584,7 @@ static int vidioc_streamon(struct file *file, void *priv,
 			ctx->output_state = QUEUE_FREE;
 			s5p_mfc_alloc_instance_buffer(ctx);
 			s5p_mfc_alloc_dec_temp_buffers(ctx);
-			spin_lock_irqsave(&dev->condlock, flags);
-			set_bit(ctx->num, &dev->ctx_work_bits);
-			spin_unlock_irqrestore(&dev->condlock, flags);
+			set_work_bit_irqsave(ctx);
 			s5p_mfc_clean_ctx_int_flags(ctx);
 			s5p_mfc_try_run(dev);
 
@@ -875,18 +868,14 @@ static int s5p_mfc_start_streaming(struct vb2_queue *q, unsigned int count)
 {
 	struct s5p_mfc_ctx *ctx = fh_to_ctx(q->drv_priv);
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned long flags;
 
 	v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
 	if (ctx->state == MFCINST_FINISHING ||
 		ctx->state == MFCINST_FINISHED)
 		ctx->state = MFCINST_RUNNING;
 	/* If context is ready then dev = work->data;schedule it to run */
-	if (s5p_mfc_ctx_ready(ctx)) {
-		spin_lock_irqsave(&dev->condlock, flags);
-		set_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock_irqrestore(&dev->condlock, flags);
-	}
+	if (s5p_mfc_ctx_ready(ctx))
+		set_work_bit_irqsave(ctx);
 	s5p_mfc_try_run(dev);
 	return 0;
 }
@@ -953,11 +942,8 @@ static void s5p_mfc_buf_queue(struct vb2_buffer *vb)
 	} else {
 		mfc_err("Unsupported buffer type (%d)\n", vq->type);
 	}
-	if (s5p_mfc_ctx_ready(ctx)) {
-		spin_lock_irqsave(&dev->condlock, flags);
-		set_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock_irqrestore(&dev->condlock, flags);
-	}
+	if (s5p_mfc_ctx_ready(ctx))
+		set_work_bit_irqsave(ctx);
 	s5p_mfc_try_run(dev);
 }
 
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
index 075cc5c5f9b..179e4db60b1 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
@@ -643,11 +643,8 @@ static int enc_post_seq_start(struct s5p_mfc_ctx *ctx)
 		spin_unlock_irqrestore(&dev->irqlock, flags);
 	}
 	ctx->state = MFCINST_RUNNING;
-	if (s5p_mfc_ctx_ready(ctx)) {
-		spin_lock_irqsave(&dev->condlock, flags);
-		set_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock_irqrestore(&dev->condlock, flags);
-	}
+	if (s5p_mfc_ctx_ready(ctx))
+		set_work_bit_irqsave(ctx);
 	s5p_mfc_try_run(dev);
 	return 0;
 }
@@ -755,11 +752,8 @@ static int enc_post_frame_start(struct s5p_mfc_ctx *ctx)
 		vb2_buffer_done(mb_entry->b, VB2_BUF_STATE_DONE);
 	}
 	spin_unlock_irqrestore(&dev->irqlock, flags);
-	if ((ctx->src_queue_cnt == 0) || (ctx->dst_queue_cnt == 0)) {
-		spin_lock(&dev->condlock);
-		clear_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock(&dev->condlock);
-	}
+	if ((ctx->src_queue_cnt == 0) || (ctx->dst_queue_cnt == 0))
+		clear_work_bit(ctx);
 	return 0;
 }
 
@@ -922,7 +916,6 @@ static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
 	struct s5p_mfc_ctx *ctx = fh_to_ctx(priv);
 	struct s5p_mfc_fmt *fmt;
 	struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
-	unsigned long flags;
 	int ret = 0;
 
 	ret = vidioc_try_fmt(file, priv, f);
@@ -947,9 +940,7 @@ static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		ctx->dst_bufs_cnt = 0;
 		ctx->capture_state = QUEUE_FREE;
 		s5p_mfc_alloc_instance_buffer(ctx);
-		spin_lock_irqsave(&dev->condlock, flags);
-		set_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock_irqrestore(&dev->condlock, flags);
+		set_work_bit_irqsave(ctx);
 		s5p_mfc_clean_ctx_int_flags(ctx);
 		s5p_mfc_try_run(dev);
 		if (s5p_mfc_wait_for_done_ctx(ctx, \
@@ -1719,15 +1710,11 @@ static int s5p_mfc_start_streaming(struct vb2_queue *q, unsigned int count)
 {
 	struct s5p_mfc_ctx *ctx = fh_to_ctx(q->drv_priv);
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned long flags;
 
 	v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
 	/* If context is ready then dev = work->data;schedule it to run */
-	if (s5p_mfc_ctx_ready(ctx)) {
-		spin_lock_irqsave(&dev->condlock, flags);
-		set_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock_irqrestore(&dev->condlock, flags);
-	}
+	if (s5p_mfc_ctx_ready(ctx))
+		set_work_bit_irqsave(ctx);
 	s5p_mfc_try_run(dev);
 	return 0;
 }
@@ -1793,11 +1780,8 @@ static void s5p_mfc_buf_queue(struct vb2_buffer *vb)
 	} else {
 		mfc_err("unsupported buffer type (%d)\n", vq->type);
 	}
-	if (s5p_mfc_ctx_ready(ctx)) {
-		spin_lock_irqsave(&dev->condlock, flags);
-		set_bit(ctx->num, &dev->ctx_work_bits);
-		spin_unlock_irqrestore(&dev->condlock, flags);
-	}
+	if (s5p_mfc_ctx_ready(ctx))
+		set_work_bit_irqsave(ctx);
 	s5p_mfc_try_run(dev);
 }