Commit ec25f68d authored by Philipp Zabel's avatar Philipp Zabel Committed by Mauro Carvalho Chehab
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[media] media: coda: allocate internal framebuffers separately from v4l2 buffers 



Some codecs running on CODA need internal framebuffers for reference and
reconstructed frames. Allocate them separately, and do not use the input
vb2_buffers: those will be handed off to userspace regularly, and there
is no way to signal to the CODA which of the registered framebuffers are
off limits. As a consequence, userspace is now free to choose the number
of v4l2 buffers.
This patch also includes the code to set up the parameter buffer for
CODA7 and above with 64-bit AXI bus width.

Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: default avatarJavier Martin <javier.martin@vista-silicon.com>
Tested-by: default avatarJavier Martin <javier.martin@vista-silicon.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 1043667b

drivers/media/platform/coda.c

+86 −55
Original line number Diff line number Diff line
@@ -45,8 +45,7 @@ 
#define CODA_ISRAM_SIZE	(2048 * 2)

#define CODA7_IRAM_SIZE		0x14000 /* 81920 bytes */



#define CODA_OUTPUT_BUFS	4

#define CODA_CAPTURE_BUFS	2

#define CODA_MAX_FRAMEBUFFERS	2



#define MAX_W		720

#define MAX_H		576
@@ -164,11 +163,12 @@ struct coda_ctx { 
	struct v4l2_m2m_ctx		*m2m_ctx;

	struct v4l2_ctrl_handler	ctrls;

	struct v4l2_fh			fh;

	struct vb2_buffer		*reference;

	int				gopcounter;

	char				vpu_header[3][64];

	int				vpu_header_size[3];

	struct coda_aux_buf		parabuf;

	struct coda_aux_buf		internal_frames[CODA_MAX_FRAMEBUFFERS];

	int				num_internal_frames;

	int				idx;

};
@@ -743,14 +743,6 @@ static int coda_job_ready(void *m2m_priv) 
		return 0;

	}



	/* For P frames a reference picture is needed too */

	if ((ctx->gopcounter != (ctx->params.gop_size - 1)) &&

	   !ctx->reference) {

		v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,

			 "not ready: reference picture not available.\n");

		return 0;

	}



	if (coda_isbusy(ctx->dev)) {

		v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,

			 "not ready: coda is still busy.\n");
@@ -804,7 +796,6 @@ static void set_default_params(struct coda_ctx *ctx) 
	ctx->params.codec_mode = CODA_MODE_INVALID;

	ctx->colorspace = V4L2_COLORSPACE_REC709;

	ctx->params.framerate = 30;

	ctx->reference = NULL;

	ctx->aborting = 0;



	/* Default formats for output and input queues */
@@ -830,7 +821,6 @@ static int coda_queue_setup(struct vb2_queue *vq, 
	unsigned int size;



	if (vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {

		*nbuffers = CODA_OUTPUT_BUFS;

		if (fmt)

			size = fmt->fmt.pix.width *

				fmt->fmt.pix.height * 3 / 2;
@@ -838,7 +828,6 @@ static int coda_queue_setup(struct vb2_queue *vq, 
			size = MAX_W *

				MAX_H * 3 / 2;

	} else {

		*nbuffers = CODA_CAPTURE_BUFS;

		size = CODA_MAX_FRAME_SIZE;

	}
@@ -891,6 +880,77 @@ static void coda_wait_finish(struct vb2_queue *q) 
	coda_lock(ctx);

}



static void coda_free_framebuffers(struct coda_ctx *ctx)

{

	int i;



	for (i = 0; i < CODA_MAX_FRAMEBUFFERS; i++) {

		if (ctx->internal_frames[i].vaddr) {

			dma_free_coherent(&ctx->dev->plat_dev->dev,

				ctx->internal_frames[i].size,

				ctx->internal_frames[i].vaddr,

				ctx->internal_frames[i].paddr);

			ctx->internal_frames[i].vaddr = NULL;

		}

	}

}



static int coda_alloc_framebuffers(struct coda_ctx *ctx, struct coda_q_data *q_data, u32 fourcc)

{

	struct coda_dev *dev = ctx->dev;



	int height = q_data->height;

	int width = q_data->width;

	u32 *p;

	int i;



	/* Allocate frame buffers */

	ctx->num_internal_frames = CODA_MAX_FRAMEBUFFERS;

	for (i = 0; i < ctx->num_internal_frames; i++) {

		ctx->internal_frames[i].size = q_data->sizeimage;

		if (fourcc == V4L2_PIX_FMT_H264 && dev->devtype->product != CODA_DX6)

			ctx->internal_frames[i].size += width / 2 * height / 2;

		ctx->internal_frames[i].vaddr = dma_alloc_coherent(

				&dev->plat_dev->dev, ctx->internal_frames[i].size,

				&ctx->internal_frames[i].paddr, GFP_KERNEL);

		if (!ctx->internal_frames[i].vaddr) {

			coda_free_framebuffers(ctx);

			return -ENOMEM;

		}

	}



	/* Register frame buffers in the parameter buffer */

	p = ctx->parabuf.vaddr;



	if (dev->devtype->product == CODA_DX6) {

		for (i = 0; i < ctx->num_internal_frames; i++) {

			p[i * 3] = ctx->internal_frames[i].paddr; /* Y */

			p[i * 3 + 1] = p[i * 3] + width * height; /* Cb */

			p[i * 3 + 2] = p[i * 3 + 1] + width / 2 * height / 2; /* Cr */

		}

	} else {

		for (i = 0; i < ctx->num_internal_frames; i += 2) {

			p[i * 3 + 1] = ctx->internal_frames[i].paddr; /* Y */

			p[i * 3] = p[i * 3 + 1] + width * height; /* Cb */

			p[i * 3 + 3] = p[i * 3] + (width / 2) * (height / 2); /* Cr */



			if (fourcc == V4L2_PIX_FMT_H264)

				p[96 + i + 1] = p[i * 3 + 3] + (width / 2) * (height / 2);



			if (i + 1 < ctx->num_internal_frames) {

				p[i * 3 + 2] = ctx->internal_frames[i+1].paddr; /* Y */

				p[i * 3 + 5] = p[i * 3 + 2] + width * height ; /* Cb */

				p[i * 3 + 4] = p[i * 3 + 5] + (width / 2) * (height / 2); /* Cr */



				if (fourcc == V4L2_PIX_FMT_H264)

					p[96 + i] = p[i * 3 + 4] + (width / 2) * (height / 2);

			}

		}

	}



	return 0;

}



static int coda_start_streaming(struct vb2_queue *q, unsigned int count)

{

	struct coda_ctx *ctx = vb2_get_drv_priv(q);
@@ -898,11 +958,10 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count) 
	u32 bitstream_buf, bitstream_size;

	struct coda_dev *dev = ctx->dev;

	struct coda_q_data *q_data_src, *q_data_dst;

	u32 dst_fourcc;

	struct vb2_buffer *buf;

	struct vb2_queue *src_vq;

	u32 dst_fourcc;

	u32 value;

	int i = 0;

	int ret;



	if (count < 1)

		return -EINVAL;
@@ -1050,25 +1109,11 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count) 
	if (coda_read(dev, CODA_RET_ENC_SEQ_SUCCESS) == 0)

		return -EFAULT;



	/*

	 * Walk the src buffer list and let the codec know the

	 * addresses of the pictures.

	 */

	src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);

	for (i = 0; i < src_vq->num_buffers; i++) {

		u32 *p;



		buf = src_vq->bufs[i];

		p = ctx->parabuf.vaddr;



		p[i * 3] = vb2_dma_contig_plane_dma_addr(buf, 0);

		p[i * 3 + 1] = p[i * 3] + q_data_src->width *

				q_data_src->height;

		p[i * 3 + 2] = p[i * 3 + 1] + q_data_src->width / 2 *

				q_data_src->height / 2;

	}

	ret = coda_alloc_framebuffers(ctx, q_data_src, dst_fourcc);

	if (ret < 0)

		return ret;



	coda_write(dev, src_vq->num_buffers, CODA_CMD_SET_FRAME_BUF_NUM);

	coda_write(dev, ctx->num_internal_frames, CODA_CMD_SET_FRAME_BUF_NUM);

	coda_write(dev, round_up(q_data_src->width, 8), CODA_CMD_SET_FRAME_BUF_STRIDE);

	if (dev->devtype->product != CODA_DX6) {

		coda_write(dev, round_up(q_data_src->width, 8), CODA7_CMD_SET_FRAME_SOURCE_BUF_STRIDE);
@@ -1191,6 +1236,8 @@ static int coda_stop_streaming(struct vb2_queue *q) 
				 "CODA_COMMAND_SEQ_END failed\n");

			return -ETIMEDOUT;

		}



		coda_free_framebuffers(ctx);

	}



	return 0;
@@ -1437,7 +1484,7 @@ static const struct v4l2_file_operations coda_fops = { 


static irqreturn_t coda_irq_handler(int irq, void *data)

{

	struct vb2_buffer *src_buf, *dst_buf, *tmp_buf;

	struct vb2_buffer *src_buf, *dst_buf;

	struct coda_dev *dev = data;

	u32 wr_ptr, start_ptr;

	struct coda_ctx *ctx;
@@ -1465,8 +1512,8 @@ static irqreturn_t coda_irq_handler(int irq, void *data) 
		return IRQ_NONE;

	}



	src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);

	dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);

	src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);

	dst_buf = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);



	/* Get results from the coda */

	coda_read(dev, CODA_RET_ENC_PIC_TYPE);
@@ -1496,23 +1543,7 @@ static irqreturn_t coda_irq_handler(int irq, void *data) 
		dst_buf->v4l2_buf.flags &= ~V4L2_BUF_FLAG_KEYFRAME;

	}



	/* Free previous reference picture if available */

	if (ctx->reference) {

		v4l2_m2m_buf_done(ctx->reference, VB2_BUF_STATE_DONE);

		ctx->reference = NULL;

	}



	/*

	 * For the last frame of the gop we don't need to save

	 * a reference picture.

	 */

	v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);

	tmp_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);

	if (ctx->gopcounter == 0)

	v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);

	else

		ctx->reference = tmp_buf;



	v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);



	ctx->gopcounter--;

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