Linaro-mm-sig November 2014

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[PATCH v8 00/11] Add DRM for stih4xx platforms

by Benjamin Gaignard

This series of patches add the support of DRM/KMS drivers for STMicroelectronics chipsets stih416 and stih407. version 8: - Allow driver to be build as kernel module. - Use Universal Plane instead of legacy code. patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git on branch: drm_kms_for_next-v8 version 7: - rebased on top of drm-next (2014-07-24) patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git on branch: drm_kms_for_next-v7 version 6: - rebased on top of new component framework API. patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git on branch: drm_kms_for_next-v6 version 5: - Rework sti_drm_drv probes functions to support deferred probe. This allow hdmi to delayed framebuffer creation until I2C is available. - Add ops functions in sti_layer structure to simpify GDP and VID code. - Add NOTES file to describe how the DRM concepts are mapped on hardware. patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git on branch: drm_kms_for_next-v5 version 4: - Remove depency between TVout it subdevices HDMI and HDA - Rework and simplify VTG and VTAC code - Fix numbers of typo and indentation - Remove debug (will be push in separate patches) - Fix remarks done in previous patcheset patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git on branch: drm_kms_for_next-v4 version 3: - Correctly split code between probe and bind funtions - Squash some commits - remove HQ-VDP device code to have a smaller patcheset, we will introduce it later. patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git on branch: drm_kms_for_next-v3 version 2: - Use componentized device instead of register sub-devices in master driver probe function - Fix Makefile and Kconfig to only allow built-in compilation patches could be found here: git://git.linaro.org/people/benjamin.gaignard/kernel.git on branch: drm_kms_for_next-v2 version 1: - First path submission Hardware is split in two main blocks: Compositor and TVout. Each of them includes specific hardware IPs and the display timing are controlled by a specific Video Timing Generator hardware IP (VTG). Compositor is made of the follow hardware IPs: - GDP (Generic Display Pipeline) which is an entry point for graphic (RGB) buffers - VDP (Video Diplay Pipeline) which is an entry point for video (YUV) buffers - HQVDP (High Quality Video Display Processor) that supports scaling, deinterlacing and some miscellaneous image quality improvements. It fetches the Video decoded buffers from memory, processes them and pushes them to the Compositor through a HW dedicated bus. - Mixer is responsible of mixing all the entries depending of their respective z-order and layout TVout is divided in 3 parts: - HDMI to generate HDMI signals, depending of chipset version HDMI phy can change. - HDA to generate signals for HD analog TV - VIP to control/switch data path coming from Compositor On stih416 compositor and Tvout are on different dies so a Video Trafic Advance inter-die Communication mechanism (VTAC) is needed. +---------------------------------------------+ +----------------------------------------+ | +-------------------------------+ +----+ | | +----+ +--------------------------+ | | | | | | | | | | | +---------+ +----+ | | | | +----+ +------+ | | | | | | | | | VIP |---->|HDMI| | | | | |GPD +------------->| | | | | | | | | | | | +----+ | | | | +----+ |Mixer |--|-->| | | | | |---|->| switcher| | | | | | | | | | | | | | | | | +----+ | | | | | | | | | | | | | | | |---->|HDA | | | | | +------+ | |VTAC|========>|VTAC| | +---------+ +----+ | | | | | | | | | | | | | | | | Compositor | | | | | | | | TVout | | | +-------------------------------+ | | | | | | +--------------------------+ | | ^ | | | | | | ^ | | | | | | | | | | | | +--------------+ | | | | | | +-------------+ | | | VTG (master) |----->| | | | | |----->| VTG (slave) | | | +--------------+ +----+ | | +----+ +-------------+ | |Digital die | | Analog Die| +---------------------------------------------+ +----------------------------------------+ On stih407 Compositor and Tvout are on the same die +-----------------------------------------------------------------+ | +-------------------------------+ +--------------------------+ | | | | | +---------+ +----+ | | | | +----+ +------+ | | | VIP |---->|HDMI| | | | | |GPD +------------->| | | | | | +----+ | | | | +----+ |Mixer |--|--|->| switcher| | | | | +----+ +-----+ | | | | | | +----+ | | | | |VDP +-->+HQVDP+--->| | | | | |---->|HDA | | | | | +----+ +-----+ +------+ | | +---------+ +----+ | | | | | | | | | | Compositor | | TVout | | | +-------------------------------+ +--------------------------+ | | ^ ^ | | | | | | +--------------+ | | | VTG | | | +--------------+ | |Digital die | +-----------------------------------------------------------------+ In addition of the drivers for the IPs listed before a thin I2C driver (hdmiddc) is used by HDMI driver to retrieve EDID for monitor. To unify interfaces of GDP and VDP we create a "layer" interface called by compositor to control both GPD and VDP. Hardware have memory contraints (alignment, contiguous) so we use CMA drm helpers functions to allocate frame buffer. File naming convention is: - sti_* for IPs drivers - sti_drm_* for drm functions implementation. Benjamin Gaignard (11): drm: sti: add bindings for DRM driver drm: sti: add VTG driver drm: sti: add VTAC drivers drm: sti: add HDMI driver drm: sti: add HDA driver drm: sti: add TVOut driver drm: sti: add GDP layer drm: sti: add VID layer drm: sti: add Mixer drm: sti: add Compositor drm: sti: Add DRM driver itself .../devicetree/bindings/gpu/st,stih4xx.txt | 189 +++++ drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/sti/Kconfig | 14 + drivers/gpu/drm/sti/Makefile | 21 + drivers/gpu/drm/sti/NOTES | 58 ++ drivers/gpu/drm/sti/sti_compositor.c | 279 +++++++ drivers/gpu/drm/sti/sti_compositor.h | 90 +++ drivers/gpu/drm/sti/sti_drm_crtc.c | 423 +++++++++++ drivers/gpu/drm/sti/sti_drm_crtc.h | 22 + drivers/gpu/drm/sti/sti_drm_drv.c | 241 ++++++ drivers/gpu/drm/sti/sti_drm_drv.h | 29 + drivers/gpu/drm/sti/sti_drm_plane.c | 195 +++++ drivers/gpu/drm/sti/sti_drm_plane.h | 18 + drivers/gpu/drm/sti/sti_gdp.c | 549 ++++++++++++++ drivers/gpu/drm/sti/sti_gdp.h | 16 + drivers/gpu/drm/sti/sti_hda.c | 794 ++++++++++++++++++++ drivers/gpu/drm/sti/sti_hdmi.c | 810 +++++++++++++++++++++ drivers/gpu/drm/sti/sti_hdmi.h | 88 +++ drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.c | 336 +++++++++ drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.h | 14 + drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.c | 211 ++++++ drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.h | 14 + drivers/gpu/drm/sti/sti_layer.c | 197 +++++ drivers/gpu/drm/sti/sti_layer.h | 123 ++++ drivers/gpu/drm/sti/sti_mixer.c | 249 +++++++ drivers/gpu/drm/sti/sti_mixer.h | 54 ++ drivers/gpu/drm/sti/sti_tvout.c | 648 +++++++++++++++++ drivers/gpu/drm/sti/sti_vid.c | 138 ++++ drivers/gpu/drm/sti/sti_vid.h | 12 + drivers/gpu/drm/sti/sti_vtac.c | 215 ++++++ drivers/gpu/drm/sti/sti_vtg.c | 366 ++++++++++ drivers/gpu/drm/sti/sti_vtg.h | 28 + 33 files changed, 6444 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpu/st,stih4xx.txt create mode 100644 drivers/gpu/drm/sti/Kconfig create mode 100644 drivers/gpu/drm/sti/Makefile create mode 100644 drivers/gpu/drm/sti/NOTES create mode 100644 drivers/gpu/drm/sti/sti_compositor.c create mode 100644 drivers/gpu/drm/sti/sti_compositor.h create mode 100644 drivers/gpu/drm/sti/sti_drm_crtc.c create mode 100644 drivers/gpu/drm/sti/sti_drm_crtc.h create mode 100644 drivers/gpu/drm/sti/sti_drm_drv.c create mode 100644 drivers/gpu/drm/sti/sti_drm_drv.h create mode 100644 drivers/gpu/drm/sti/sti_drm_plane.c create mode 100644 drivers/gpu/drm/sti/sti_drm_plane.h create mode 100644 drivers/gpu/drm/sti/sti_gdp.c create mode 100644 drivers/gpu/drm/sti/sti_gdp.h create mode 100644 drivers/gpu/drm/sti/sti_hda.c create mode 100644 drivers/gpu/drm/sti/sti_hdmi.c create mode 100644 drivers/gpu/drm/sti/sti_hdmi.h create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.c create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g0c55phy.h create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.c create mode 100644 drivers/gpu/drm/sti/sti_hdmi_tx3g4c28phy.h create mode 100644 drivers/gpu/drm/sti/sti_layer.c create mode 100644 drivers/gpu/drm/sti/sti_layer.h create mode 100644 drivers/gpu/drm/sti/sti_mixer.c create mode 100644 drivers/gpu/drm/sti/sti_mixer.h create mode 100644 drivers/gpu/drm/sti/sti_tvout.c create mode 100644 drivers/gpu/drm/sti/sti_vid.c create mode 100644 drivers/gpu/drm/sti/sti_vid.h create mode 100644 drivers/gpu/drm/sti/sti_vtac.c create mode 100644 drivers/gpu/drm/sti/sti_vtg.c create mode 100644 drivers/gpu/drm/sti/sti_vtg.h -- 1.9.1

8 years, 8 months

[PATCH v3 00/19] Exynos SYSMMU (IOMMU) integration with DT and DMA-mapping subsystem

by Marek Szyprowski

Hello Everyone, This is another attempt to finally make Exynos SYSMMU driver fully integrated with DMA-mapping subsystem. The main change from previous version is a rebase onto latest "automatic DMA configuration for IOMMU masters" patches from Will Deacon. This patchset demonstrates that Will's proposal works fine and significantly simplifies the driver code. Best regards Marek Szyprowski Samsung R&D Institute Poland Changelog: v3: - rebased onto "[RFC PATCH v4 0/8] Introduce automatic DMA configuration for IOMMU masters" - added some minor fixes for iommu and dma-mapping frameworks v2: http://thread.gmane.org/gmane.linux.kernel.iommu/6472/ - rebased onto "[RFC PATCH v3 0/7] Introduce automatic DMA configuration for IOMMU masters" patches: http://www.spinics.net/lists/arm-kernel/msg362076.html - changed initialization from bus notifiers to DT related callbacks - removed support for separate IO address spaces - this will be discussed separately after the basic support gets merged - removed support for power domain notifier-based runtime power management - this also will be discussed separately later v1: https://lkml.org/lkml/2014/8/5/183 - initial version, feature complete, completely rewrote integration approach Patch summary: Marek Szyprowski (19): iommu: fix const qualifier in of_iommu_set_ops iommu: fix initialization without 'add_device' callback arm: dma-mapping: add missing check for iommu drm: exynos: detach from default dma-mapping domain on init arm: exynos: pm_domains: add support for devices registered before arch_initcall ARM: dts: exynos4: add sysmmu nodes iommu: exynos: don't read version register on every tlb operation iommu: exynos: remove unused functions iommu: exynos: remove useless spinlock iommu: exynos: refactor function parameters to simplify code iommu: exynos: remove unused functions, part 2 iommu: exynos: remove useless device_add/remove callbacks iommu: exynos: add support for binding more than one sysmmu to master device iommu: exynos: add support for runtime_pm iommu: exynos: rename variables to reflect their purpose iommu: exynos: document internal structures iommu: exynos: remove excessive includes and sort others alphabetically iommu: exynos: init from dt-specific callback instead of initcall iommu: exynos: add callback for initializing devices from device tree arch/arm/boot/dts/exynos4.dtsi | 117 +++++++ arch/arm/boot/dts/exynos4210.dtsi | 23 ++ arch/arm/boot/dts/exynos4x12.dtsi | 82 +++++ arch/arm/mach-exynos/pm_domains.c | 9 +- arch/arm/mm/dma-mapping.c | 2 +- drivers/gpu/drm/exynos/exynos_drm_iommu.c | 3 + drivers/iommu/exynos-iommu.c | 490 ++++++++++++++---------------- drivers/iommu/iommu.c | 2 +- include/linux/of_iommu.h | 4 +- 9 files changed, 459 insertions(+), 273 deletions(-) -- 1.9.2

9 years, 11 months

[RFC 0/4] dma-buf Constraints-Enabled Allocation helpers

by Sumit Semwal

Hi, Why: ==== While sharing buffers using dma-buf, currently there's no mechanism to let devices share their memory access constraints with each other to allow for delayed allocation of backing storage. This RFC attempts to introduce the idea of memory constraints of a device, and how these constraints can be shared and used to help allocate buffers that can satisfy requirements of all devices attached to a particular dma-buf. How: ==== A constraints_mask is added to dma_parms of the device, and at the time of each device attachment to a dma-buf, the dma-buf uses this constraints_mask to calculate the access_mask for the dma-buf. Allocators can be defined for each of these constraints_masks, and then helper functions can be used to allocate the backing storage from the matching allocator satisfying the constraints of all devices interested. A new miscdevice, /dev/cenalloc [1] is created, which acts as the dma-buf exporter to make this transparent to the devices. More details in the patch description of "cenalloc: Constraint-Enabled Allocation helpers for dma-buf". At present, the constraint_mask is only a bitmask, but it should be possible to change it to a struct and adapt the constraint_mask calculation accordingly, based on discussion. Important requirement: ====================== Of course, delayed allocation can only work if all participating devices will wait for other devices to have 'attached' before mapping the buffer for the first time. As of now, users of dma-buf(drm prime, v4l2 etc) call the attach() and then map_attachment() almost immediately after it. This would need to be changed if they were to benefit from constraints. What 'cenalloc' is not: ======================= - not 'general' allocator helpers - useful only for constraints-enabled devices that share buffers with others using dma-buf. - not a replacement for existing allocation mechanisms inside various subsystems; merely a possible alternative. - no page-migration - it would be very complementary to the delayed allocation suggested here. TODOs: ====== - demonstration test cases - vma helpers for allocators - more sample allocators - userspace ioctl (It should be a simple one, and we have one ready, but wanted to agree on the kernel side of things first) May the brickbats begin, please! :) Best regards, ~Sumit. [1]: 'C'onstraints 'EN'abled 'ALLOC'ation helpers = cenalloc: it might not be a very appealing name, so suggestions are very welcome! Benjamin Gaignard (1): cenalloc: a sample allocator for contiguous page allocation Sumit Semwal (3): dma-buf: Add constraints sharing information cenalloc: Constraint-Enabled Allocation helpers for dma-buf cenalloc: Build files for constraint-enabled allocation helpers MAINTAINERS | 1 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/cenalloc/Kconfig | 8 + drivers/cenalloc/Makefile | 3 + drivers/cenalloc/cenalloc.c | 597 ++++++++++++++++++++++++++++++ drivers/cenalloc/cenalloc.h | 99 +++++ drivers/cenalloc/cenalloc_priv.h | 188 ++++++++++ drivers/cenalloc/cenalloc_system_contig.c | 225 +++++++++++ drivers/dma-buf/dma-buf.c | 50 ++- include/linux/device.h | 7 +- include/linux/dma-buf.h | 14 + 12 files changed, 1189 insertions(+), 6 deletions(-) create mode 100644 drivers/cenalloc/Kconfig create mode 100644 drivers/cenalloc/Makefile create mode 100644 drivers/cenalloc/cenalloc.c create mode 100644 drivers/cenalloc/cenalloc.h create mode 100644 drivers/cenalloc/cenalloc_priv.h create mode 100644 drivers/cenalloc/cenalloc_system_contig.c -- 1.9.1

9 years, 11 months

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Linaro-mm-sig November 2014