media: staging: rkisp1: add output device for parameters

Add the output video driver that accept parameters from userspace.
Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Signed-off-by: Yichong Zhong <zyc@rock-chips.com>
Signed-off-by: Jacob Chen <cc@rock-chips.com>
Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Allon Huang <allon.huang@rock-chips.com>
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/rkisp1/Makefile

@@ -4,4 +4,5 @@ rockchip-isp1-objs += 	rkisp1-capture.o \
 			rkisp1-dev.o \
 			rkisp1-isp.o \
 			rkisp1-resizer.o \
-			rkisp1-stats.o
+			rkisp1-stats.o \
+			rkisp1-params.o

drivers/staging/media/rkisp1/rkisp1-common.h

@@ -195,6 +195,27 @@ struct rkisp1_stats {
 	struct mutex wq_lock;
 };
 
+/*
+ * struct rkisp1_params - ISP input parameters device
+ *
+ * @cur_params: Current ISP parameters
+ * @is_first_params: the first params should take effect immediately
+ */
+struct rkisp1_params {
+	struct rkisp1_vdev_node vnode;
+	struct rkisp1_device *rkisp1;
+
+	spinlock_t config_lock;
+	struct list_head params;
+	struct rkisp1_params_cfg cur_params;
+	struct v4l2_format vdev_fmt;
+	bool is_streaming;
+	bool is_first_params;
+
+	enum v4l2_quantization quantization;
+	enum rkisp1_fmt_raw_pat_type raw_type;
+};
+
 struct rkisp1_resizer {
 	struct v4l2_subdev sd;
 	enum rkisp1_stream_id id;
@@ -222,6 +243,7 @@ struct rkisp1_debug {
  * @isp: ISP sub-device
  * @rkisp1_capture: capture video device
  * @stats: ISP statistics output device
+ * @params: ISP input parameters device
  */
 struct rkisp1_device {
 	void __iomem *base_addr;
@@ -238,6 +260,7 @@ struct rkisp1_device {
 	struct rkisp1_resizer resizer_devs[2];
 	struct rkisp1_capture capture_devs[2];
 	struct rkisp1_stats stats;
+	struct rkisp1_params params;
 	struct media_pipeline pipe;
 	struct vb2_alloc_ctx *alloc_ctx;
 	struct rkisp1_debug debug;
@@ -287,6 +310,7 @@ void rkisp1_isp_isr(struct rkisp1_device *rkisp1);
 void rkisp1_mipi_isr(struct rkisp1_device *rkisp1);
 void rkisp1_capture_isr(struct rkisp1_device *rkisp1);
 void rkisp1_stats_isr(struct rkisp1_stats *stats, u32 isp_ris);
+void rkisp1_params_isr(struct rkisp1_device *rkisp1, u32 isp_mis);
 
 int rkisp1_capture_devs_register(struct rkisp1_device *rkisp1);
 void rkisp1_capture_devs_unregister(struct rkisp1_device *rkisp1);
@@ -299,4 +323,15 @@ int rkisp1_stats_register(struct rkisp1_stats *stats,
 			  struct rkisp1_device *rkisp1);
 void rkisp1_stats_unregister(struct rkisp1_stats *stats);
 
+void rkisp1_params_configure(struct rkisp1_params *params,
+			     enum rkisp1_fmt_raw_pat_type bayer_pat,
+			     enum v4l2_quantization quantization);
+void rkisp1_params_disable(struct rkisp1_params *params);
+int rkisp1_params_register(struct rkisp1_params *params,
+			   struct v4l2_device *v4l2_dev,
+			   struct rkisp1_device *rkisp1);
+void rkisp1_params_unregister(struct rkisp1_params *params);
+
+void rkisp1_params_isr_handler(struct rkisp1_device *rkisp1, u32 isp_mis);
+
 #endif /* _RKISP1_COMMON_H */

drivers/staging/media/rkisp1/rkisp1-dev.c

@@ -57,13 +57,13 @@
  * |  DMA   |------------------------------------+                          Self Picture Path
  * +--------+
  *
- *         rkisp1-stats.c
- *       |===============|
- *       +---------------+
- *       |               |
- *       |      ISP      |
- *       |               |
- *       +---------------+
+ *         rkisp1-stats.c        rkisp1-params.c
+ *       |===============|      |===============|
+ *       +---------------+      +---------------+
+ *       |               |      |               |
+ *       |      ISP      |      |      ISP      |
+ *       |               |      |               |
+ *       +---------------+      +---------------+
  *
  *
  * Media Topology
@@ -72,13 +72,13 @@
  *      | Sensor 2 |     | Sensor X |
  *      ------------ ... ------------
  *      |    0     |     |    0     |
- *      +----------+     +----------+
- *                  \      |
- *                   \     |
- *    +----------+    \    |
- *    | Sensor 1 |     v   v
- *    ------------      +------+------+
- *    |    0     |----->|  0   |  1   |
+ *      +----------+     +----------+      +-----------+
+ *                  \      |               |  params   |
+ *                   \     |               | (output)  |
+ *    +----------+    \    |               +-----------+
+ *    | Sensor 1 |     v   v                     |
+ *    ------------      +------+------+          |
+ *    |    0     |----->|  0   |  1   |<---------+
  *    +----------+      |------+------|
  *                      |     ISP     |
  *                      |------+------|
@@ -164,6 +164,14 @@ static int rkisp1_create_links(struct rkisp1_device *rkisp1)
 			return ret;
 	}
 
+	/* params links */
+	source = &rkisp1->params.vnode.vdev.entity;
+	sink = &rkisp1->isp.sd.entity;
+	ret = media_create_pad_link(source, 0, sink,
+				    RKISP1_ISP_PAD_SINK_PARAMS, flags);
+	if (ret)
+		return ret;
+
 	/* 3A stats links */
 	source = &rkisp1->isp.sd.entity;
 	sink = &rkisp1->stats.vnode.vdev.entity;
@@ -352,14 +360,21 @@ static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
 	if (ret)
 		goto err_unreg_capture_devs;
 
+	ret = rkisp1_params_register(&rkisp1->params,
+				     &rkisp1->v4l2_dev, rkisp1);
+	if (ret)
+		goto err_unreg_stats;
+
 	ret = rkisp1_subdev_notifier(rkisp1);
 	if (ret) {
 		dev_err(rkisp1->dev,
 			"Failed to register subdev notifier(%d)\n", ret);
-		goto err_unreg_stats;
+		goto err_unreg_params;
 	}
 
 	return 0;
+err_unreg_params:
+	rkisp1_params_unregister(&rkisp1->params);
 err_unreg_stats:
 	rkisp1_stats_unregister(&rkisp1->stats);
 err_unreg_capture_devs:
@@ -529,6 +544,7 @@ static int rkisp1_remove(struct platform_device *pdev)
 	v4l2_async_notifier_unregister(&rkisp1->notifier);
 	v4l2_async_notifier_cleanup(&rkisp1->notifier);
 
+	rkisp1_params_unregister(&rkisp1->params);
 	rkisp1_stats_unregister(&rkisp1->stats);
 	rkisp1_capture_devs_unregister(rkisp1);
 	rkisp1_resizer_devs_unregister(rkisp1);

drivers/staging/media/rkisp1/rkisp1-isp.c

@@ -357,6 +357,18 @@ static int rkisp1_config_isp(struct rkisp1_device *rkisp1)
 		    RKISP1_CIF_ISP_PIC_SIZE_ERROR | RKISP1_CIF_ISP_FRAME_IN;
 	rkisp1_write(rkisp1, irq_mask, RKISP1_CIF_ISP_IMSC);
 
+	if (src_fmt->fmt_type == RKISP1_FMT_BAYER) {
+		rkisp1_params_disable(&rkisp1->params);
+	} else {
+		struct v4l2_mbus_framefmt *src_frm;
+
+		src_frm = rkisp1_isp_get_pad_fmt(&rkisp1->isp, NULL,
+						 RKISP1_ISP_PAD_SINK_VIDEO,
+						 V4L2_SUBDEV_FORMAT_ACTIVE);
+		rkisp1_params_configure(&rkisp1->params, sink_fmt->bayer_pat,
+					src_frm->quantization);
+	}
+
 	return 0;
 }
 
@@ -1142,4 +1154,11 @@ void rkisp1_isp_isr(struct rkisp1_device *rkisp1)
 			       RKISP1_CIF_ISP_HIST_MEASURE_RDY))
 			rkisp1_stats_isr(&rkisp1->stats, isp_ris);
 	}
+
+	/*
+	 * Then update changed configs. Some of them involve
+	 * lot of register writes. Do those only one per frame.
+	 * Do the updates in the order of the processing flow.
+	 */
+	rkisp1_params_isr(rkisp1, status);
 }