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Diffstat (limited to 'drivers/staging/media/davinci_vpfe/davinci-vpfe-mc.txt')
| -rw-r--r-- | drivers/staging/media/davinci_vpfe/davinci-vpfe-mc.txt | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/drivers/staging/media/davinci_vpfe/davinci-vpfe-mc.txt b/drivers/staging/media/davinci_vpfe/davinci-vpfe-mc.txt deleted file mode 100644 index a1e91778aa9b..000000000000 --- a/drivers/staging/media/davinci_vpfe/davinci-vpfe-mc.txt +++ /dev/null @@ -1,154 +0,0 @@ -Davinci Video processing Front End (VPFE) driver - -Copyright (C) 2012 Texas Instruments Inc - -Contacts: Manjunath Hadli <manjunath.hadli@ti.com> - Prabhakar Lad <prabhakar.lad@ti.com> - - -Introduction -============ - -This file documents the Texas Instruments Davinci Video processing Front End -(VPFE) driver located under drivers/media/platform/davinci. The original driver -exists for Davinci VPFE, which is now being changed to Media Controller -Framework. - -Currently the driver has been successfully used on the following -version of Davinci: - - DM365/DM368 - -The driver implements V4L2, Media controller and v4l2_subdev interfaces. Sensor, -lens and flash drivers using the v4l2_subdev interface in the kernel are -supported. - - -Split to subdevs -================ - -The Davinci VPFE is split into V4L2 subdevs, each of the blocks inside the VPFE -having one subdev to represent it. Each of the subdevs provide a V4L2 subdev -interface to userspace. - - DAVINCI ISIF - DAVINCI IPIPEIF - DAVINCI IPIPE - DAVINCI CROP RESIZER - DAVINCI RESIZER A - DAVINCI RESIZER B - -Each possible link in the VPFE is modelled by a link in the Media controller -interface. For an example program see [1]. - - -ISIF, IPIPE, and RESIZER block IOCTLs -====================================== - -The Davinci Video processing Front End (VPFE) driver supports standard V4L2 -IOCTLs and controls where possible and practical. Much of the functions provided -by the VPFE, however, does not fall under the standard IOCTL's. - -In general, there is a private ioctl for configuring each of the blocks -containing hardware-dependent functions. - -The following private IOCTLs are supported: - - VIDIOC_VPFE_ISIF_[S/G]_RAW_PARAMS - VIDIOC_VPFE_IPIPE_[S/G]_CONFIG - VIDIOC_VPFE_RSZ_[S/G]_CONFIG - -The parameter structures used by these ioctl's are described in -include/uapi/linux/davinci_vpfe.h. - -The VIDIOC_VPFE_ISIF_S_RAW_PARAMS, VIDIOC_VPFE_IPIPE_S_CONFIG and -VIDIOC_VPFE_RSZ_S_CONFIG are used to configure, enable and disable functions in -the isif, ipipe and resizer blocks respectively. These IOCTL's control several -functions in the blocks they control. VIDIOC_VPFE_ISIF_S_RAW_PARAMS IOCTL -accepts a pointer to struct vpfe_isif_raw_config as its argument. Similarly -VIDIOC_VPFE_IPIPE_S_CONFIG accepts a pointer to struct vpfe_ipipe_config. And -VIDIOC_VPFE_RSZ_S_CONFIG accepts a pointer to struct vpfe_rsz_config as its -argument. Similarly VIDIOC_VPFE_ISIF_G_RAW_PARAMS, VIDIOC_VPFE_IPIPE_G_CONFIG -and VIDIOC_VPFE_RSZ_G_CONFIG are used to get the current configuration set in -the isif, ipipe and resizer blocks respectively. - -The detailed functions of the VPFE itself related to a given VPFE block is -described in the Technical Reference Manuals (TRMs) --- see the end of the -document for those. - - -IPIPEIF block IOCTLs -====================================== - -The following private IOCTLs are supported: - - VIDIOC_VPFE_IPIPEIF_[S/G]_CONFIG - -The parameter structures used by these ioctl's are described in -include/uapi/linux/dm365_ipipeif.h - -The VIDIOC_VPFE_IPIPEIF_S_CONFIG is used to configure the ipipeif -hardware block. The VIDIOC_VPFE_IPIPEIF_S_CONFIG and -VIDIOC_VPFE_IPIPEIF_G_CONFIG accepts a pointer to struct ipipeif_params -as its argument. - - -VPFE Operating Modes -========================================== - -a: Continuous Modes ------------------------- - -1: tvp514x/tvp7002/mt9p031---> DAVINCI ISIF---> SDRAM - -2: tvp514x/tvp7002/mt9p031---> DAVINCI ISIF---> DAVINCI IPIPEIF--->| - | - <--------------------<----------------<---------------------<---| - | - V - DAVINCI CROP RESIZER--->DAVINCI RESIZER [A/B]---> SDRAM - -3: tvp514x/tvp7002/mt9p031---> DAVINCI ISIF---> DAVINCI IPIPEIF--->| - | - <--------------------<----------------<---------------------<---| - | - V - DAVINCI IPIPE---> DAVINCI CROP RESIZER--->DAVINCI RESIZER [A/B]---> SDRAM - -a: Single Shot Modes ------------------------- - -1: SDRAM---> DAVINCI IPIPEIF---> DAVINCI IPIPE---> DAVINCI CROP RESIZER--->| - | - <----------------<----------------<------------------<---------------<--| - | - V -DAVINCI RESIZER [A/B]---> SDRAM - -2: SDRAM---> DAVINCI IPIPEIF---> DAVINCI CROP RESIZER--->| - | - <----------------<----------------<---------------<---| - | - V -DAVINCI RESIZER [A/B]---> SDRAM - - -Technical reference manuals (TRMs) and other documentation -========================================================== - -Davinci DM365 TRM: -<URL:http://www.ti.com/lit/ds/sprs457e/sprs457e.pdf> -Referenced MARCH 2009-REVISED JUNE 2011 - -Davinci DM368 TRM: -<URL:http://www.ti.com/lit/ds/sprs668c/sprs668c.pdf> -Referenced APRIL 2010-REVISED JUNE 2011 - -Davinci Video Processing Front End (VPFE) DM36x -<URL:http://www.ti.com/lit/ug/sprufg8c/sprufg8c.pdf> - - -References -========== - -[1] http://git.ideasonboard.org/?p=media-ctl.git;a=summary |