diff options
author | Hans Verkuil <hans.verkuil@cisco.com> | 2015-03-09 16:59:59 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-05-01 07:48:26 -0300 |
commit | 6eb40d594b886fbd9d45cffd7a7a1f989d8389b1 (patch) | |
tree | d15f49a9ff78920fd5dcc090591ab66011a26f8c /drivers/media | |
parent | ca657b28fd63f0f0971247e12727d286043b1d15 (diff) | |
download | linux-6eb40d594b886fbd9d45cffd7a7a1f989d8389b1.tar.bz2 |
[media] marvell-ccic: add planar support to dma-vmalloc
The dma-vmalloc implementation didn't support planar formats, but with
a little bit of refactoring that is easy to fix.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
-rw-r--r-- | drivers/media/platform/marvell-ccic/mcam-core.c | 94 |
1 files changed, 46 insertions, 48 deletions
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c index 0d9469663eec..2495ab662698 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.c +++ b/drivers/media/platform/marvell-ccic/mcam-core.c @@ -206,12 +206,6 @@ struct mcam_dma_desc { u32 segment_len; }; -struct yuv_pointer_t { - dma_addr_t y; - dma_addr_t u; - dma_addr_t v; -}; - /* * Our buffer type for working with videobuf2. Note that the vb2 * developers have decreed that struct vb2_buffer must be at the @@ -223,7 +217,6 @@ struct mcam_vb_buffer { struct mcam_dma_desc *dma_desc; /* Descriptor virtual address */ dma_addr_t dma_desc_pa; /* Descriptor physical address */ int dma_desc_nent; /* Number of mapped descriptors */ - struct yuv_pointer_t yuv_p; }; static inline struct mcam_vb_buffer *vb_to_mvb(struct vb2_buffer *vb) @@ -341,6 +334,47 @@ static void mcam_disable_mipi(struct mcam_camera *mcam) mcam->mipi_enabled = false; } +static bool mcam_fmt_is_planar(__u32 pfmt) +{ + struct mcam_format_struct *f; + + f = mcam_find_format(pfmt); + return f->planar; +} + +static void mcam_write_yuv_bases(struct mcam_camera *cam, + unsigned frame, dma_addr_t base) +{ + struct v4l2_pix_format *fmt = &cam->pix_format; + u32 pixel_count = fmt->width * fmt->height; + dma_addr_t y, u = 0, v = 0; + + y = base; + + switch (fmt->pixelformat) { + case V4L2_PIX_FMT_YUV422P: + u = y + pixel_count; + v = u + pixel_count / 2; + break; + case V4L2_PIX_FMT_YUV420: + u = y + pixel_count; + v = u + pixel_count / 4; + break; + case V4L2_PIX_FMT_YVU420: + v = y + pixel_count; + u = v + pixel_count / 4; + break; + default: + break; + } + + mcam_reg_write(cam, REG_Y0BAR + frame * 4, y); + if (mcam_fmt_is_planar(fmt->pixelformat)) { + mcam_reg_write(cam, REG_U0BAR + frame * 4, u); + mcam_reg_write(cam, REG_V0BAR + frame * 4, v); + } +} + /* ------------------------------------------------------------------- */ #ifdef MCAM_MODE_VMALLOC @@ -411,15 +445,14 @@ static void mcam_free_dma_bufs(struct mcam_camera *cam) static void mcam_ctlr_dma_vmalloc(struct mcam_camera *cam) { /* - * Store the first two Y buffers (we aren't supporting - * planar formats for now, so no UV bufs). Then either + * Store the first two YUV buffers. Then either * set the third if it exists, or tell the controller * to just use two. */ - mcam_reg_write(cam, REG_Y0BAR, cam->dma_handles[0]); - mcam_reg_write(cam, REG_Y1BAR, cam->dma_handles[1]); + mcam_write_yuv_bases(cam, 0, cam->dma_handles[0]); + mcam_write_yuv_bases(cam, 1, cam->dma_handles[1]); if (cam->nbufs > 2) { - mcam_reg_write(cam, REG_Y2BAR, cam->dma_handles[2]); + mcam_write_yuv_bases(cam, 2, cam->dma_handles[2]); mcam_reg_clear_bit(cam, REG_CTRL1, C1_TWOBUFS); } else mcam_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS); @@ -514,14 +547,6 @@ static inline int mcam_check_dma_buffers(struct mcam_camera *cam) * DMA-contiguous code. */ -static bool mcam_fmt_is_planar(__u32 pfmt) -{ - struct mcam_format_struct *f; - - f = mcam_find_format(pfmt); - return f->planar; -} - /* * Set up a contiguous buffer for the given frame. Here also is where * the underrun strategy is set: if there is no buffer available, reuse @@ -533,9 +558,7 @@ static bool mcam_fmt_is_planar(__u32 pfmt) static void mcam_set_contig_buffer(struct mcam_camera *cam, int frame) { struct mcam_vb_buffer *buf; - struct v4l2_pix_format *fmt = &cam->pix_format; dma_addr_t dma_handle; - u32 pixel_count = fmt->width * fmt->height; struct vb2_buffer *vb; /* @@ -559,32 +582,7 @@ static void mcam_set_contig_buffer(struct mcam_camera *cam, int frame) vb = &buf->vb_buf; dma_handle = vb2_dma_contig_plane_dma_addr(vb, 0); - buf->yuv_p.y = dma_handle; - - switch (cam->pix_format.pixelformat) { - case V4L2_PIX_FMT_YUV422P: - buf->yuv_p.u = buf->yuv_p.y + pixel_count; - buf->yuv_p.v = buf->yuv_p.u + pixel_count / 2; - break; - case V4L2_PIX_FMT_YUV420: - buf->yuv_p.u = buf->yuv_p.y + pixel_count; - buf->yuv_p.v = buf->yuv_p.u + pixel_count / 4; - break; - case V4L2_PIX_FMT_YVU420: - buf->yuv_p.v = buf->yuv_p.y + pixel_count; - buf->yuv_p.u = buf->yuv_p.v + pixel_count / 4; - break; - default: - break; - } - - mcam_reg_write(cam, frame == 0 ? REG_Y0BAR : REG_Y1BAR, buf->yuv_p.y); - if (mcam_fmt_is_planar(fmt->pixelformat)) { - mcam_reg_write(cam, frame == 0 ? - REG_U0BAR : REG_U1BAR, buf->yuv_p.u); - mcam_reg_write(cam, frame == 0 ? - REG_V0BAR : REG_V1BAR, buf->yuv_p.v); - } + mcam_write_yuv_bases(cam, frame, dma_handle); } /* |