media: rockchip: rkisp1: make some isp-stats functions variable

The isp block evolved in subsequent socs, so some functions
will behave differently on newer variants.

Therefore make it possible to override the needed stats functions.
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/rockchip/rkisp1/rkisp1-common.h

@@ -232,6 +232,16 @@ struct rkisp1_capture {
 	} pix;
 };
 
+struct rkisp1_stats;
+struct rkisp1_stats_ops {
+	void (*get_awb_meas)(struct rkisp1_stats *stats,
+			     struct rkisp1_stat_buffer *pbuf);
+	void (*get_aec_meas)(struct rkisp1_stats *stats,
+			     struct rkisp1_stat_buffer *pbuf);
+	void (*get_hst_meas)(struct rkisp1_stats *stats,
+			     struct rkisp1_stat_buffer *pbuf);
+};
+
 /*
  * struct rkisp1_stats - ISP Statistics device
  *
@@ -244,6 +254,7 @@ struct rkisp1_capture {
 struct rkisp1_stats {
 	struct rkisp1_vdev_node vnode;
 	struct rkisp1_device *rkisp1;
+	const struct rkisp1_stats_ops *ops;
 
 	spinlock_t lock; /* locks the buffers list 'stats' */
 	struct list_head stat;

drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c

@@ -286,6 +286,12 @@ static void rkisp1_stats_get_bls_meas(struct rkisp1_stats *stats,
 	}
 }
 
+static const struct rkisp1_stats_ops rkisp1_stats_ops = {
+	.get_awb_meas = rkisp1_stats_get_awb_meas,
+	.get_aec_meas = rkisp1_stats_get_aec_meas,
+	.get_hst_meas = rkisp1_stats_get_hst_meas,
+};
+
 static void
 rkisp1_stats_send_measurement(struct rkisp1_stats *stats, u32 isp_ris)
 {
@@ -307,18 +313,18 @@ rkisp1_stats_send_measurement(struct rkisp1_stats *stats, u32 isp_ris)
 	cur_stat_buf = (struct rkisp1_stat_buffer *)
 			vb2_plane_vaddr(&cur_buf->vb.vb2_buf, 0);
 	if (isp_ris & RKISP1_CIF_ISP_AWB_DONE)
-		rkisp1_stats_get_awb_meas(stats, cur_stat_buf);
+		stats->ops->get_awb_meas(stats, cur_stat_buf);
 
 	if (isp_ris & RKISP1_CIF_ISP_AFM_FIN)
 		rkisp1_stats_get_afc_meas(stats, cur_stat_buf);
 
 	if (isp_ris & RKISP1_CIF_ISP_EXP_END) {
-		rkisp1_stats_get_aec_meas(stats, cur_stat_buf);
+		stats->ops->get_aec_meas(stats, cur_stat_buf);
 		rkisp1_stats_get_bls_meas(stats, cur_stat_buf);
 	}
 
 	if (isp_ris & RKISP1_CIF_ISP_HIST_MEASURE_RDY)
-		rkisp1_stats_get_hst_meas(stats, cur_stat_buf);
+		stats->ops->get_hst_meas(stats, cur_stat_buf);
 
 	vb2_set_plane_payload(&cur_buf->vb.vb2_buf, 0,
 			      sizeof(struct rkisp1_stat_buffer));
@@ -352,6 +358,8 @@ static void rkisp1_init_stats(struct rkisp1_stats *stats)
 		V4L2_META_FMT_RK_ISP1_STAT_3A;
 	stats->vdev_fmt.fmt.meta.buffersize =
 		sizeof(struct rkisp1_stat_buffer);
+
+	stats->ops = &rkisp1_stats_ops;
 }
 
 int rkisp1_stats_register(struct rkisp1_device *rkisp1)