diff options
author | Steven Toth <stoth@kernellabs.com> | 2011-10-10 11:09:54 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-10-14 17:11:15 -0300 |
commit | 5ab27e6d31be4a794a44477b94aa56dd625eb0f2 (patch) | |
tree | 4fe86021ecf03bd6ed4bcc9ae2a4d216a1a18589 /drivers/media/video/cx23885/cx23885-core.c | |
parent | 4f9c41439c495b4685393cf865418f7e6425fe60 (diff) |
[media] cx23885: add vbi buffer formatting, window changes and video core changes
Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-core.c')
-rw-r--r-- | drivers/media/video/cx23885/cx23885-core.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c index d42d2251d486..40e68b22015e 100644 --- a/drivers/media/video/cx23885/cx23885-core.c +++ b/drivers/media/video/cx23885/cx23885-core.c @@ -1214,6 +1214,54 @@ int cx23885_risc_databuffer(struct pci_dev *pci, return 0; } +int cx23885_risc_vbibuffer(struct pci_dev *pci, struct btcx_riscmem *risc, + struct scatterlist *sglist, unsigned int top_offset, + unsigned int bottom_offset, unsigned int bpl, + unsigned int padding, unsigned int lines) +{ + u32 instructions, fields; + __le32 *rp; + int rc; + + fields = 0; + if (UNSET != top_offset) + fields++; + if (UNSET != bottom_offset) + fields++; + + /* estimate risc mem: worst case is one write per page border + + one write per scan line + syncs + jump (all 2 dwords). Padding + can cause next bpl to start close to a page border. First DMA + region may be smaller than PAGE_SIZE */ + /* write and jump need and extra dword */ + instructions = fields * (1 + ((bpl + padding) * lines) + / PAGE_SIZE + lines); + instructions += 2; + rc = btcx_riscmem_alloc(pci, risc, instructions*12); + if (rc < 0) + return rc; + /* write risc instructions */ + rp = risc->cpu; + + /* Sync to line 6, so US CC line 21 will appear in line '12' + * in the userland vbi payload */ + if (UNSET != top_offset) + rp = cx23885_risc_field(rp, sglist, top_offset, 6, + bpl, padding, lines, 0); + + if (UNSET != bottom_offset) + rp = cx23885_risc_field(rp, sglist, bottom_offset, 0x207, + bpl, padding, lines, 0); + + + + /* save pointer to jmp instruction address */ + risc->jmp = rp; + BUG_ON((risc->jmp - risc->cpu + 2) * sizeof(*risc->cpu) > risc->size); + return 0; +} + + int cx23885_risc_stopper(struct pci_dev *pci, struct btcx_riscmem *risc, u32 reg, u32 mask, u32 value) { |