> -----Original Message----- > From: Hiremath, Vaibhav > Sent: Wednesday, July 28, 2010 12:31 PM > To: Sin, David; Hans Verkuil > Cc: linux-omap@xxxxxxxxxxxxxxx; Tony Lindgren; Russell King; > Kanigeri, Hari; Ohad Ben-Cohen; Shilimkar, Santosh; > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Subject: RE: [RFC 0/8] TI TILER-DMM driver > > > -----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 > [dhs] You're right; this is needed. However, I first wanted to get some feedback for allocating 2-D memory just from kernel space. > > > > > > 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
