media: coda: jpeg: add CODA960 JPEG encoder support

This patch adds JPEG encoding support for CODA960, handling the JPEG
hardware directly. A separate JPEG encoder video device is created due
to the separate hardware unit and different supported pixel formats.
While the hardware can not change subsampling on the fly, it can encode
4:2:2 subsampled images into JPEGs of the same subsampling.

There are two additional tracepoints added to the coda driver that can
be used together with the v4l2:v4l2_qbuf and v4l2:v4l2_dqbuf tracepoints
to to follow video frames through the mem2mem device when encoding or
decoding with the CODA960 JPEG codec:
    coda:coda_jpeg_run
    coda:coda_jpeg_done
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Richard Leitner <richard.leitner@skidata.com>
[hverkuil-cisco@xs4all.nl: removed unused k and q_data_dst variables]
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/coda/coda-common.c

@@ -155,6 +155,7 @@ static const struct coda_codec coda7_codecs[] = {
 static const struct coda_codec coda9_codecs[] = {
 	CODA_CODEC(CODA9_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1920, 1088),
 	CODA_CODEC(CODA9_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1920, 1088),
+	CODA_CODEC(CODA9_MODE_ENCODE_MJPG, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_JPEG,   8192, 8192),
 	CODA_CODEC(CODA9_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1088),
 	CODA_CODEC(CODA9_MODE_DECODE_MP2,  V4L2_PIX_FMT_MPEG2,  V4L2_PIX_FMT_YUV420, 1920, 1088),
 	CODA_CODEC(CODA9_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1088),
@@ -235,6 +236,22 @@ static const struct coda_video_device coda_bit_jpeg_decoder = {
 	},
 };
 
+static const struct coda_video_device coda9_jpeg_encoder = {
+	.name = "coda-jpeg-encoder",
+	.type = CODA_INST_ENCODER,
+	.ops = &coda9_jpeg_encode_ops,
+	.direct = true,
+	.src_formats = {
+		V4L2_PIX_FMT_NV12,
+		V4L2_PIX_FMT_YUV420,
+		V4L2_PIX_FMT_YVU420,
+		V4L2_PIX_FMT_YUV422P,
+	},
+	.dst_formats = {
+		V4L2_PIX_FMT_JPEG,
+	},
+};
+
 static const struct coda_video_device *codadx6_video_devices[] = {
 	&coda_bit_encoder,
 };
@@ -252,6 +269,7 @@ static const struct coda_video_device *coda7_video_devices[] = {
 };
 
 static const struct coda_video_device *coda9_video_devices[] = {
+	&coda9_jpeg_encoder,
 	&coda_bit_encoder,
 	&coda_bit_decoder,
 };
@@ -721,7 +739,8 @@ static int coda_s_fmt(struct coda_ctx *ctx, struct v4l2_format *f,
 		ctx->tiled_map_type = GDI_TILED_FRAME_MB_RASTER_MAP;
 		break;
 	case V4L2_PIX_FMT_NV12:
-		if (!disable_tiling && ctx->dev->devtype->product == CODA_960) {
+		if (!disable_tiling && ctx->use_bit &&
+		    ctx->dev->devtype->product == CODA_960) {
 			ctx->tiled_map_type = GDI_TILED_FRAME_MB_RASTER_MAP;
 			break;
 		}
@@ -1787,7 +1806,7 @@ static void coda_buf_queue(struct vb2_buffer *vb)
 				coda_queue_source_change_event(ctx);
 		}
 	} else {
-		if (ctx->inst_type == CODA_INST_ENCODER &&
+		if ((ctx->inst_type == CODA_INST_ENCODER || !ctx->use_bit) &&
 		    vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 			vbuf->sequence = ctx->qsequence++;
 		v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
@@ -2996,6 +3015,22 @@ static int coda_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	/* JPEG IRQ */
+	if (dev->devtype->product == CODA_960) {
+		irq = platform_get_irq_byname(pdev, "jpeg");
+		if (irq < 0)
+			return irq;
+
+		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+						coda9_jpeg_irq_handler,
+						IRQF_ONESHOT, CODA_NAME " jpeg",
+						dev);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to request jpeg irq\n");
+			return ret;
+		}
+	}
+
 	dev->rstc = devm_reset_control_get_optional_exclusive(&pdev->dev,
 							      NULL);
 	if (IS_ERR(dev->rstc)) {

drivers/media/platform/coda/coda.h

@@ -126,6 +126,7 @@ struct coda_params {
 	u8			jpeg_quality;
 	u8			jpeg_restart_interval;
 	u8			*jpeg_qmat_tab[3];
+	u32			*jpeg_huff_data;
 	int			codec_mode;
 	int			codec_mode_aux;
 	enum v4l2_mpeg_video_multi_slice_mode slice_mode;
@@ -366,7 +367,9 @@ void coda_set_jpeg_compression_quality(struct coda_ctx *ctx, int quality);
 
 extern const struct coda_context_ops coda_bit_encode_ops;
 extern const struct coda_context_ops coda_bit_decode_ops;
+extern const struct coda_context_ops coda9_jpeg_encode_ops;
 
 irqreturn_t coda_irq_handler(int irq, void *data);
+irqreturn_t coda9_jpeg_irq_handler(int irq, void *data);
 
 #endif /* __CODA_H__ */

drivers/media/platform/coda/trace.h

@@ -154,6 +154,16 @@ DEFINE_EVENT(coda_buf_meta_class, coda_dec_rot_done,
 	TP_ARGS(ctx, buf, meta)
 );
 
+DEFINE_EVENT(coda_buf_class, coda_jpeg_run,
+	TP_PROTO(struct coda_ctx *ctx, struct vb2_v4l2_buffer *buf),
+	TP_ARGS(ctx, buf)
+);
+
+DEFINE_EVENT(coda_buf_class, coda_jpeg_done,
+	TP_PROTO(struct coda_ctx *ctx, struct vb2_v4l2_buffer *buf),
+	TP_ARGS(ctx, buf)
+);
+
 #endif /* __CODA_TRACE_H__ */
 
 #undef TRACE_INCLUDE_PATH