> -----Original Message----- > From: Sin, David > Sent: Wednesday, July 28, 2010 8:53 PM > To: Hans Verkuil > Cc: linux-omap@xxxxxxxxxxxxxxx; Tony Lindgren; Russell King; Kanigeri, Hari; > Ohad Ben-Cohen; Hiremath, Vaibhav; Shilimkar, Santosh; linux-arm- > kernel@xxxxxxxxxxxxxxxxxxx > Subject: RE: [RFC 0/8] TI TILER-DMM driver > > > -----Original Message----- > > From: Hans Verkuil [mailto:hverkuil@xxxxxxxxx] > > Sent: Saturday, July 24, 2010 6:13 AM > > To: Sin, David > > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxxxxx; > > linux-omap@xxxxxxxxxxxxxxx; Tony Lindgren; Russell King; > > Kanigeri, Hari; Ohad Ben-Cohen; Hiremath, Vaibhav; Shilimkar, Santosh > > Subject: Re: [RFC 0/8] TI TILER-DMM driver > > > > Hi David, > > <snip> > > The main question that I have is how this driver is to be > > used in practice. > > How does it fit into the bigger video4linux picture? Is this > > something that > > is mainly used from other v4l or fb drivers? Or is it > > controlled by userspace? > > [dhs] I missed this one -- my apologies. As I stated to Vaibhav, any device > can use TILER memory, but there is a big advantage, performance-wise, for 2- > Dimensional macro block based buffers. This HW is intended for image/video > hardware accelerators (e.g. OMAP4 IVA-HD). Plus there's the added advantage > of doing zero-copy flips and rotations for the OMAP display and image sub- > systems. > > In this RFC, there are only kernel APIs to allocate TILER memory. > Eventually, we would like to provide a way to obtain TILER memory to the > user space. > [Hiremath, Vaibhav] Don't you think, user has to mmap memory (irrespective of whether it is tiles view or not) to userland in both the cases, Fbdev and V4L2 (MMAP mode)? Am I missing something here? Thanks, Vaibhav > > > > Regards, > > > > Hans > > > > > > > > List of pending items in proposed order: > > > > > > * Add area packing support (multiple blocks can reside in > > the same band/area) > > > to optimize area use > > > * Add group-ID support (to specify which blocks can reside > > together in the > > > same area) > > > * Add multiple search directions to TCM-SiTA > > > * Add 1D block support (including adding 1D search algo to TCM-SiTA) > > > * Optimize mutex handling (don.t hold mutex during memory > > > allocation/mapping/cache flushing) > > > * Add block reference counting, support for sharing blocks > > > * Move all kernel-API-s to tiler-iface.c > > > * Support orphaned block support (in preparation for > > process cleanup support) > > > * Change block identification from physical address to key-ID pair > > > (in preparation for user space support, and process security) > > > * Add support for process security (blocks from separate > > processes never > > > reside in the same band) > > > * Support file interface (ioctl and mmap) > > > * Support for buffers (ordered list of blocks that are > > mapped to userspace > > > together, such as YUV420sp) > > > * Support 1D user buffer mapping into TILER container > > > * Support for block pre-reservation (to further optimize area use) > > > > > > David Sin (1): > > > TILER-DMM: DMM-PAT driver for TI TILER > > > > > > Lajos Molnar (6): > > > TILER-DMM: Container manager interface and utility definitons > > > TILER-DMM: TILER Memory Manager interface and implementation > > > TILER-DMM: TILER interface file and documentation > > > TILER-DMM: Geometry and view manipulation functions. > > > TILER-DMM: Main TILER driver implementation. > > > TILER-DMM: Linking TILER driver into the Linux kernel build > > > > > > Ravi Ramachandra (1): > > > TILER-DMM: Sample TCM implementation: Simple TILER Allocator > > > > > > Documentation/arm/TILER | 144 +++++++++ > > > arch/arm/mach-omap2/include/mach/dmm.h | 128 ++++++++ > > > arch/arm/mach-omap2/include/mach/tiler.h | 201 +++++++++++++ > > > drivers/media/Kconfig | 6 + > > > drivers/media/Makefile | 2 + > > > drivers/media/video/tiler/Kconfig | 65 ++++ > > > drivers/media/video/tiler/Makefile | 7 + > > > drivers/media/video/tiler/_tiler.h | 51 ++++ > > > drivers/media/video/tiler/dmm.c | 200 +++++++++++++ > > > drivers/media/video/tiler/tcm.h | 209 +++++++++++++ > > > drivers/media/video/tiler/tcm/Makefile | 1 + > > > drivers/media/video/tiler/tcm/_tcm-sita.h | 64 ++++ > > > drivers/media/video/tiler/tcm/tcm-sita.c | 459 > > +++++++++++++++++++++++++++++ > > > drivers/media/video/tiler/tcm/tcm-sita.h | 37 +++ > > > drivers/media/video/tiler/tcm/tcm-utils.h | 54 ++++ > > > drivers/media/video/tiler/tiler-geom.c | 360 > > ++++++++++++++++++++++ > > > drivers/media/video/tiler/tiler-iface.c | 106 +++++++ > > > drivers/media/video/tiler/tiler-main.c | 426 > > ++++++++++++++++++++++++++ > > > drivers/media/video/tiler/tmm-pat.c | 274 +++++++++++++++++ > > > drivers/media/video/tiler/tmm.h | 109 +++++++ > > > 20 files changed, 2903 insertions(+), 0 deletions(-) > > > create mode 100644 Documentation/arm/TILER > > > create mode 100644 arch/arm/mach-omap2/include/mach/dmm.h > > > create mode 100644 arch/arm/mach-omap2/include/mach/tiler.h > > > create mode 100644 drivers/media/video/tiler/Kconfig > > > create mode 100644 drivers/media/video/tiler/Makefile > > > create mode 100644 drivers/media/video/tiler/_tiler.h > > > create mode 100644 drivers/media/video/tiler/dmm.c > > > create mode 100644 drivers/media/video/tiler/tcm.h > > > create mode 100644 drivers/media/video/tiler/tcm/Makefile > > > create mode 100644 drivers/media/video/tiler/tcm/_tcm-sita.h > > > create mode 100644 drivers/media/video/tiler/tcm/tcm-sita.c > > > create mode 100644 drivers/media/video/tiler/tcm/tcm-sita.h > > > create mode 100644 drivers/media/video/tiler/tcm/tcm-utils.h > > > create mode 100644 drivers/media/video/tiler/tiler-geom.c > > > create mode 100644 drivers/media/video/tiler/tiler-iface.c > > > create mode 100644 drivers/media/video/tiler/tiler-main.c > > > create mode 100644 drivers/media/video/tiler/tmm-pat.c > > > create mode 100644 drivers/media/video/tiler/tmm.h > > > > > > -- > > > To unsubscribe from this list: send the line "unsubscribe > > linux-omap" in > > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > > > > > > > -- > > Hans Verkuil - video4linux developer - sponsored by TANDBERG, > > part of Cisco > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
