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2017-09-26drm/amd: Closed hash table with low overhead (v2)Felix Kuehling1-0/+1
This adds a statically sized closed hash table implementation with low memory and CPU overhead. The API is inspired by kfifo. Storing, retrieving and deleting data does not involve any dynamic memory management, which makes it ideal for use in interrupt context. Static memory usage per entry comprises a 32 or 64 bit hash key, two bits for occupancy tracking and the value size stored in the table. No list heads or pointers are needed. Therefore this data structure should be quite cache-friendly, too. It uses linear probing and lazy deletion. During lookups free space is reclaimed and entries relocated to speed up future lookups. v2: squash in do_div and _BITOPS_LONG_SHIFT fixes Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-08-16drm: Add GEM backed framebuffer libraryNoralf Trønnes1-1/+1
This library provides helpers for drivers that don't subclass drm_framebuffer and are backed by drm_gem_object. The code is taken from drm_fb_cma_helper. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Eric Anholt <eric@anholt.net> Link: https://patchwork.freedesktop.org/patch/msgid/1502631125-13557-2-git-send-email-noralf@tronnes.org
2017-06-16Merge tag 'drm-misc-next-2017-06-15' of ↵Dave Airlie1-0/+1
git://anongit.freedesktop.org/git/drm-misc into drm-next Cross-subsystem Changes: - dt-bindings: add vendor prefix for NLT Technologies, Ltd. (Lucas) - dt-bindings: Add support for samsung s6e3hf2 panel (Hoegeun) Core Changes: - Add drm_panel_bridge to avoid connector boilerplate in drivers (Eric) - Trival fixes for dupe forward decl and reduce scope of variable (Dawid) Driver Changes: - dw-hdmi: Use mode_valid hook on bridge instead of connector (Jose) - vc4,atmel-hlcdc: Use drm_panel_bridge where appropriate (Eric) - panel: Add Innolux P079ZCA panel driver (Chris) - panel-simple: Add NL12880B20-05, NL192108AC18-02D, P320HVN03 panels (Lucas) - panel-samsung-s6e3ha2: Add s6e3hf2 panel support (Hoegeun) - zte,vc4,pl111,panel,mxsfb: Miscellaneous fixes Cc: Jose Abreu <Jose.Abreu@synopsys.com> Cc: Eric Anholt <eric@anholt.net> Cc: Chris Zhong <zyw@rock-chips.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Hoegeun Kwon <hoegeun.kwon@samsung.com> Cc: Dawid Kurek <dawikur@gmail.com> * tag 'drm-misc-next-2017-06-15' of git://anongit.freedesktop.org/git/drm-misc: (26 commits) drm: Reduce scope of 'state' variable drm: mxsfb_crtc: Reset the eLCDIF controller drm: Remove duplicate forward declaration drm/panel: s6e3ha2: Add support for s6e3hf2 panel on TM2e board dt-bindings: Add support for samsung s6e3hf2 panel drm/panel: add backlight dependency for sitronix-st7789v drm/panel: S6E3HA2 needs backlight code drm/panel: simple: add support for AUO P320HVN03 drm/panel: simple: add support for NLT NL192108AC18-02D dt-bindings: add vendor prefix for NLT Technologies, Ltd. drm/panel: simple: add support for NEC NL12880B20-05 drm/panel: add Innolux P079ZCA panel driver dt-bindings: Add INNOLUX P079ZCA panel bindings drm/vc4: Fix resource leak in 'vc4_get_hang_state_ioctl()' in error handling path drm/vc4/vc4_bo.c: always set bo->resv drm: Add const to name field declaration in struct drm_prop_enum_list drm/pl111: Fix offset calculation for the primary plane. drm/atmel-hlcdc: Fix panel registration drm/bridge: Build the panel wrapper in drm_kms_helper drm/atmel-hlcdc: Replace the panel usage with drm_panel_bridge. ...
2017-06-14drm: introduce sync objects (v4)Dave Airlie1-1/+2
Sync objects are new toplevel drm object, that contain a pointer to a fence. This fence can be updated via command submission ioctls via drivers. There is also a generic wait obj API modelled on the vulkan wait API (with code modelled on some amdgpu code). These objects can be converted to an opaque fd that can be passes between processes. v2: rename reference/unreference to put/get (Chris) fix leaked reference (David Zhou) drop mutex in favour of cmpxchg (Chris) v3: cleanups from danvet, rebase on drm_fops rename check fd_flags is 0 in ioctls. v4: export find/free, change replace fence to take a syncobj. In order to support lookup first, replace later semantics which seem in the end to be cleaner. Reviewed-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Dave Airlie <airlied@redhat.com>
2017-06-07drm/bridge: Build the panel wrapper in drm_kms_helperMaarten Lankhorst1-1/+1
This fixes the following depmod error when building drm as a module: depmod: ERROR: Found 6 modules in dependency cycles! depmod: ERROR: Cycle detected: drm -> drm_kms_helper -> drm Fixes: 13dfc0540a57 ("drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.") Tested-by: Lofstedt, Marta <marta.lofstedt@intel.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> Link: http://patchwork.freedesktop.org/patch/msgid/3fd262cf-1db6-4335-320c-af92f9014502@linux.intel.com
2017-06-05drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.Eric Anholt1-0/+1
Many DRM drivers have common code to make a stub connector implementation that wraps a drm_panel. By wrapping the panel in a DRM bridge, all of the connector code (including calls during encoder enable/disable) goes away. v2: Fix build with CONFIG_DRM=m, drop "dev" argument that should just be the panel's dev, move kerneldoc up a level and document _remove(). v3: Fix another breakage with CONFIG_DRM=m, fix breakage with CONFIG_OF=n, move protos under CONFIG_DRM_PANEL_BRIDGE, wrap a line. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v1) Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> (v2) Acked-by: Archit Taneja <architt@codeaurora.org> (v2) Signed-off-by: Archit Taneja <architt@codeaurora.org> Link: http://patchwork.freedesktop.org/patch/msgid/20170602202514.11900-1-eric@anholt.net
2017-06-01drm: Extract drm_vblank.[hc]Daniel Vetter1-1/+1
drm_irq.c contains both the irq helper library (optional) and the vblank support (optional, but part of the modeset uapi, and doesn't require the use of the irq helpers at all. Split this up for more clarity of the scope of the individual bits. v2: Move misplaced hunks to this patch (Stefan). Cc: Stefan Agner <stefan@agner.ch> Reviewed-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170531092146.12528-1-daniel.vetter@ffwll.ch
2017-05-08drm/pl111: Initial drm/kms driver for pl111Tom Cooksey1-0/+1
This is a modesetting driver for the pl111 CLCD display controller found on various ARM platforms such as the Versatile Express. The driver has only been tested on the bcm911360_entphn platform so far, with PRIME-based buffer sharing between vc4 and clcd. It reuses the existing devicetree binding, while not using quite as many of its properties as the fbdev driver does (those are left for future work). v2: Nearly complete rewrite by anholt, cutting 2/3 of the code thanks to DRM core's excellent new helpers. v3: Don't match pl110 any more, don't attach if we don't have a DRM panel, use DRM_GEM_CMA_FOPS, update MAINTAINERS, use the simple display helper, use drm_gem_cma_dumb_create (same as our wrapper). v4: Change the driver's .name to not clash with fbdev in sysfs, drop platform alias, drop redundant "drm" in DRM driver name, hook up .prepare_fb to the CMA helper so that DMA fences should work. v5: Move register definitions inside the driver directory, fix build in COMPILE_TEST and !AMBA mode. v6: Drop TIM2_CLKSEL for now to be consistent with existing DT bindings, switch back to external register definitions. Signed-off-by: Tom Cooksey <tom.cooksey@arm.com> Signed-off-by: Eric Anholt <eric@anholt.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> (v5) Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170413031746.12921-2-eric@anholt.net
2017-04-14drm/stm: Add STM32 LTDC driverYannick Fertre1-0/+1
This controller provides output signals to interface directly a variety of LCD and TFT panels. These output signals are: RGB signals (up to 24bpp), vertical & horizontal synchronisations, data enable and the pixel clock. Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Yannick Fertre <yannick.fertre@st.com> Signed-off-by: Eric Anholt <eric@anholt.net> Link: http://patchwork.freedesktop.org/patch/msgid/1492164819-10513-5-git-send-email-yannick.fertre@st.com Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Eric Anholt <eric@anholt.net>
2017-03-21drm: Add SCDC helpersThierry Reding1-1/+2
SCDC is a mechanism defined in the HDMI 2.0 specification that allows the source and sink devices to communicate. This commit introduces helpers to access the SCDC and provides the symbolic names for the various registers defined in the specification. V2: Rebase. V3: Added R-B from Jose. V4: Rebase V5: Addressed review comments from Ville - Handle the I2c return values in a better way (dp_dual_mode) - Make the macros for SCDC Major/Minor more readable, by adding a 'GET' in the macro names V6: Rebase V7: Rebase V8: Rebase V9: Rebase V10: Rebase Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Reviewed-by: Jose Abreu <joabreu@synopsys.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1489404244-16608-2-git-send-email-shashank.sharma@intel.com
2017-03-11Merge branch 'drm/next/platform' of git://linuxtv.org/pinchartl/media into ↵Daniel Vetter1-1/+1
drm-misc-next Merge Laurent's drm_platform removal code. Only conflict is with the drm_pci.h extraction, which allows me to fix up the misplayed drm_platform_init fumble that 0day and Stephen Rothwell reported. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
2017-03-09drm: rename drm_fops.c to drm_file.cDaniel Vetter1-1/+1
It's not just file ops, but drm_file stuff in general. This is prep work to extracting a drm_file.h header in the next patch. Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170308141257.12119-8-daniel.vetter@ffwll.ch
2017-02-18drm: Add DRM support for tiny LCD displaysNoralf Trønnes1-0/+1
tinydrm provides helpers for very simple displays that can use CMA backed framebuffers and need flushing on changes. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Thierry Reding <treding@nvidia.com>
2017-02-17drm: Remove unused drm_platform midlayerLaurent Pinchart1-1/+1
Now that the last driver has been converted, the drm_platform midlayer is unused. Remove it. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch Reviewed-by: Sean Paul <seanpaul@chromium.org>
2017-01-06drm: compile drm_vm.c only when neededBenjamin Gaignard1-1/+2
drm_vm.c functions are only need for DRM_LEGACY and DRM_NOUVEAU. Use a new DRM_VM to define when drm_vm.c in needed. stub drm_legacy_vma_flush() to avoid compilation issues version 4: - a "config DRM_VM" in Kconfig Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> [danvet: Fix conflict.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2016-12-28drm: Fix O= out-of-tree builds for selftestsDaniel Vetter1-1/+1
Kbuild really doesn't like non-recursive Makefiles, but they do work as long as you build without O= Reported-by: kbuild test robot <fengguang.wu@intel.com> Fixes: 50f0033d1a0f ("drm: Add some kselftests for the DRM range manager (struct drm_mm)") Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Christian König <christian.koenig@amd.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1482918077-30027-1-git-send-email-daniel.vetter@ffwll.ch
2016-12-27drm: Add some kselftests for the DRM range manager (struct drm_mm)Chris Wilson1-0/+1
First we introduce a smattering of infrastructure for writing selftests. The idea is that we have a test module that exercises a particular portion of the exported API, and that module provides a set of tests that can either be run as an ensemble via kselftest or individually via an igt harness (in this case igt/drm_mm). To accommodate selecting individual tests, we export a boolean parameter to control selection of each test - that is hidden inside a bunch of reusable boilerplate macros to keep writing the tests simple. v2: Choose a random random_seed unless one is specified by the user. v3: More parameters to control max_iterations and max_prime of the tests. Testcase: igt/drm_mm Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Christian König <christian.koenig@amd.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161222083641.2691-7-chris@chris-wilson.co.uk
2016-12-27drm: Add a simple generator of random permutationsChris Wilson1-0/+1
When testing, we want a random but yet reproducible order in which to process elements. Here we create an array which is a random (using the Tausworthe PRNG) permutation of the order in which to execute. Note these are simple helpers intended to be merged upstream in lib/ v2: Tidier code by David Herrmann v3: Add reminder that this code is intended to be temporary, with at least the bulk of the prandom changes going to lib/ Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161222083641.2691-6-chris@chris-wilson.co.uk
2016-12-08Merge tag 'meson-drm-for-4.10' of github.com:superna9999/linux into drm-nextDave Airlie1-0/+1
Add support for the Amlogic Meson Video Processing Unit - Only CVBS/Composite output for Amlogic Meson GXBB/GXL/GXM SoCs - Add MAINTAINERS entry - Add DT bindings documentation * tag 'meson-drm-for-4.10' of github.com:superna9999/linux: MAINTAINERS: add entry for Amlogic DRM drivers dt-bindings: display: add Amlogic Meson DRM Bindings drm: Add support for Amlogic Meson Graphic Controller
2016-12-06drm: Add new driver for MXSFB controllerMarek Vasut1-0/+1
Add new driver for the MXSFB controller found in i.MX23/28/6SX . The MXSFB controller is a simple framebuffer controller with one parallel LCD output. Unlike the MXSFB fbdev driver that is used on these systems now, this driver uses the DRM/KMS framework. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Shawn Guo <shawnguo@kernel.org>
2016-12-01drm: Add support for Amlogic Meson Graphic ControllerNeil Armstrong1-0/+1
The Amlogic Meson Display controller is composed of several components : DMC|---------------VPU (Video Processing Unit)----------------|------HHI------| | vd1 _______ _____________ _________________ | | D |-------| |----| | | | | HDMI PLL | D | vd2 | VIU | | Video Post | | Video Encoders |<---|-----VCLK | R |-------| |----| Processing | | | | | | osd2 | | | |---| Enci ----------|----|-----VDAC------| R |-------| CSC |----| Scalers | | Encp ----------|----|----HDMI-TX----| A | osd1 | | | Blenders | | Encl ----------|----|---------------| M |-------|______|----|____________| |________________| | | ___|__________________________________________________________|_______________| VIU: Video Input Unit --------------------- The Video Input Unit is in charge of the pixel scanout from the DDR memory. It fetches the frames addresses, stride and parameters from the "Canvas" memory. This part is also in charge of the CSC (Colorspace Conversion). It can handle 2 OSD Planes and 2 Video Planes. VPP: Video Post Processing -------------------------- The Video Post Processing is in charge of the scaling and blending of the various planes into a single pixel stream. There is a special "pre-blending" used by the video planes with a dedicated scaler and a "post-blending" to merge with the OSD Planes. The OSD planes also have a dedicated scaler for one of the OSD. VENC: Video Encoders -------------------- The VENC is composed of the multiple pixel encoders : - ENCI : Interlace Video encoder for CVBS and Interlace HDMI - ENCP : Progressive Video Encoder for HDMI - ENCL : LCD LVDS Encoder The VENC Unit gets a Pixel Clocks (VCLK) from a dedicated HDMI PLL and clock tree and provides the scanout clock to the VPP and VIU. The ENCI is connected to a single VDAC for Composite Output. The ENCI and ENCP are connected to an on-chip HDMI Transceiver. This driver is a DRM/KMS driver using the following DRM components : - GEM-CMA - PRIME-CMA - Atomic Modesetting - FBDev-CMA For the following SoCs : - GXBB Family (S905) - GXL Family (S905X, S905D) - GXM Family (S912) The current driver only supports the CVBS PAL/NTSC output modes, but the CRTC/Planes management should support bigger modes. But Advanced Colorspace Conversion, Scaling and HDMI Modes will be added in a second time. The Device Tree bindings makes use of the endpoints video interface definitions to connect to the optional CVBS and in the future the HDMI Connector nodes. HDMI Support is planned for a next release. Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2016-11-15drm: Extract drm_mode_config.[hc]Daniel Vetter1-1/+1
And shuffle the kernel-doc structure a bit since drm_crtc.[hc] now only contains CRTC-related functions and structures. v2: - rebase onto drm-misc - don't forget to move drm_mode_config_cleanup. - move 2 internal decls under the right heading (Chris) Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
2016-11-15drm: Extract drm_dumb_buffers.cDaniel Vetter1-1/+2
Just code movement, doc cleanup will follow up later. v2: Keep all the copyright notices. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161114115825.22050-2-daniel.vetter@ffwll.ch
2016-11-11Merge tag 'zxdrm-4.10' of ↵Dave Airlie1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into drm-next ZTE zxdrm driver support for 4.10: This is the initial ZTE VOU display controller DRM/KMS driver. There are still some features to be added, like overlay plane, scaling, and more output devices support. But it's already useful with dual CRTCs and HDMI display working. [airlied: use drm_format_plane_cpp instead of legacy api] * tag 'zxdrm-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: MAINTAINERS: add an entry for ZTE ZX DRM driver drm: zte: add initial vou drm driver dt-bindings: add bindings doc for ZTE VOU display controller
2016-11-08drm: add helper for printing to log or seq_fileRob Clark1-1/+1
Sometimes it is nice not to duplicate equivalent printk() and seq_printf() code. v2: simplify things w/ va_format, and use dev_printk, docs Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1478358492-30738-3-git-send-email-robdclark@gmail.com
2016-11-07drm: zte: add initial vou drm driverShawn Guo1-0/+1
It adds the initial ZTE VOU display controller DRM driver. There are still some features to be added, like overlay plane, scaling, and more output devices support. But it's already useful with dual CRTCs and HDMI monitor working. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2016-10-17drm: Add API for capturing frame CRCsTomeu Vizoso1-1/+2
Adds files and directories to debugfs for controlling and reading frame CRCs, per CRTC: dri/0/crtc-0/crc dri/0/crtc-0/crc/control dri/0/crtc-0/crc/data Drivers can implement the set_crc_source callback() in drm_crtc_funcs to start and stop generating frame CRCs and can add entries to the output by calling drm_crtc_add_crc_entry. v2: - Lots of good fixes suggested by Thierry. - Added documentation. - Changed the debugfs layout. - Moved to allocate the entries circular queue once when frame generation gets enabled for the first time. v3: - Use the control file just to select the source, and start and stop capture when the data file is opened and closed, respectively. - Make variable the number of CRC values per entry, per source. - Allocate entries queue each time we start capturing as now there isn't a fixed number of CRC values per entry. - Store the frame counter in the data file as a 8-digit hex number. - For sources that cannot provide useful frame numbers, place XXXXXXXX in the frame field. v4: - Build only if CONFIG_DEBUG_FS is enabled. - Use memdup_user_nul. - Consolidate calculation of the size of an entry in a helper. - Add 0x prefix to hex numbers in the data file. - Remove unnecessary snprintf and strlen usage in read callback. v5: - Made the crcs array in drm_crtc_crc_entry fixed-size - Lots of other smaller improvements suggested by Emil Velikov v7: - Move definition of drm_debugfs_crtc_crc_add to drm_internal.h v8: - Call debugfs_remove_recursive when we fail to create the minor device v9: - Register the debugfs directory for a crtc from drm_crtc_register_all() v10: - Don't let debugfs failures interrupt CRTC registration (Emil Velikov) v11: - Remove extra brace that broke compilation. Sorry! Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Reviewed-by: Emil Velikov <emil.velikov@collabora.com> Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1475767268-14379-3-git-send-email-tomeu.vizoso@collabora.com
2016-09-22drm: Extract drm_color_mgmt.[hc]Daniel Vetter1-1/+1
For both the new degamm/lut/gamma atomic combo, and the old legacy gamma tables. Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1474448370-32227-5-git-send-email-daniel.vetter@ffwll.ch
2016-09-22drm: Extract drm_plane.[hc]Daniel Vetter1-1/+2
Just pure code movement, cleanup and polish will happen in later patches. v2: Don't forget all the ioctl! To extract those cleanly I decided to put check_src_coords into drm_framebuffer.c (and give it a drm_framebuffer_ prefix), since that just checks framebuffer constraints. v3: rebase over PAGE_FLIP_TARGET. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> [seanpaul] This patch as posted on the list was rebased on: commit 6f00975c619064a18c23fd3aced325ae165a73b9 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Sat Aug 20 12:22:11 2016 +0200 drm: Reject page_flip for !DRIVER_MODESET so as a result of moving the page_flip ioctl, this fix has been rolled into this patch. Signed-off-by: Sean Paul <seanpaul@chromium.org>
2016-09-01Merge tag 'topic/drm-misc-2016-08-31' of ↵Dave Airlie1-1/+2
git://anongit.freedesktop.org/drm-intel into drm-next More -misc stuff - moar drm_crtc.c split up&documentation - some fixes for the simple kms helpers (Andrea) - I included all the dri1 patches from David - we're not removing any code or drivers, and it seems to have worked as a wake-up call to motivate a few more people to upstream kms conversions for these. Feel free to revert if you disagree strongly. - a few other single patches * tag 'topic/drm-misc-2016-08-31' of git://anongit.freedesktop.org/drm-intel: (24 commits) drm: drm_probe_helper: Fix output_poll_work scheduling drm: bridge/dw-hdmi: Fix colorspace and scan information registers values drm/doc: Polish docs for drm_property&drm_property_blob drm: Unify handling of blob and object properties drm: Extract drm_property.[hc] drm: move drm_mode_legacy_fb_format to drm_fourcc.c drm/doc: Polish docs for drm_mode_object drm: Remove drm_mode_object->atomic_count drm: Extract drm_mode_object.[hc] drm/doc: Polish kerneldoc for encoders drm: Extract drm_encoder.[hc] drm/fb-helper: don't call remove_conflicting_framebuffers for FB=m && DRM=y drm/atomic-helper: Add NO_DISABLE_AFTER_MODESET flag support for plane commit drm/atomic-helper: Disable appropriate planes in disable_planes_on_crtc() drm/atomic-helper: Add atomic_disable CRTC helper callback drm: simple_kms_helper: add support for bridges drm: simple_kms_helper: make connector optional at init time drm/bridge: introduce bridge detaching mechanism drm/simple-helpers: Always add planes to the state update drm: reduce GETCLIENT to a minimum ...
2016-08-29drm: Extract drm_property.[hc]Daniel Vetter1-1/+1
This just contains the base property classes and all the code to handle blobs. I think for any kind of standardized/shared properties it's better to have separate files - this is fairly big already as-is. v2: resurrect misplaced hunk (Daniel Stone) Cc: Daniel Stone <daniel@fooishbar.org> Reviewed-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160829082757.17913-7-daniel.vetter@ffwll.ch
2016-08-29drm: Extract drm_mode_object.[hc]Daniel Vetter1-1/+1
Just for the struct drm_mode_object base class. The header file was already partially extracted to help untangle the include loops. v2: - Also move the generic get/set property ioctls. At first this seemed like a bad idea since it requires making drm_mode_crtc_set_obj_prop non-static. But eventually that will get split away too (like the connector version already is) for both crtc and planes. Hence I reconsidered. - drm_mode_object.[hc] instead of drm_modeset.[hc], which requires renaming the drm_modeset.h header I already started building up. This is more consistent (matches the name of the main structure), and I want to be able to use drm_modeset.[hc] for the basic modeset init/cleanup functionality like drm_mode_config_init. Reviewed-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160829082757.17913-3-daniel.vetter@ffwll.ch
2016-08-29drm: Extract drm_encoder.[hc]Daniel Vetter1-1/+2
Same treatment as before. Only hiccup is drm_crtc_mask, which unfortunately can't be resolved until drm_crtc.h is less of a monster. Untangle the header loop with a forward declaration for that static inline. Reviewed-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160829082757.17913-1-daniel.vetter@ffwll.ch
2016-08-25Merge branch 'drm-intel-next' of git://anongit.freedesktop.org/drm-intel ↵Dave Airlie1-1/+1
into drm-next drm-intel-next-2016-08-22: - bugfixes and cleanups for rcu-protected requests (Chris) - atomic modeset fixes for gpu reset on pre-g4x (Maarten&Ville) - guc submission improvements (Dave Gordon) - panel power sequence cleanup (Imre) - better use of stolen and unmappable ggtt (Chris), plus prep work to make that happen - rework of framebuffer offsets, prep for multi-plane framebuffers (Ville) - fully partial ggtt vmaps, including fenced ones (Chris) - move lots more of the gem tracking from the object to the vma (Chris) - tune the command parser (Chris) - allow fbc without fences on recent platforms (Chris) - fbc frontbuffer tracking fixes (Chris) - fast prefaulting using io-mappping.h pgprot caching (Chris) * 'drm-intel-next' of git://anongit.freedesktop.org/drm-intel: (141 commits) io-mapping: Fixup for different names of writecombine io-mapping.h: s/PAGE_KERNEL_IO/PAGE_KERNEL/ drm/i915: Update DRIVER_DATE to 20160822 drm/i915: Use remap_io_mapping() to prefault all PTE in a single pass drm/i915: Embed the io-mapping struct inside drm_i915_private io-mapping: Always create a struct to hold metadata about the io-mapping drm/i915/fbc: Allow on unfenced surfaces, for recent gen drm/i915/fbc: Don't set an illegal fence if unfenced drm/i915: Flush delayed fence releases after reset drm/i915: Reattach comment, complete type specification drm/i915/cmdparser: Accelerate copies from WC memory drm/i915/cmdparser: Use binary search for faster register lookup drm/i915/cmdparser: Check for SKIP descriptors first drm/i915/cmdparser: Compare against the previous command descriptor drm/i915/cmdparser: Improve hash function drm/i915/cmdparser: Only cache the dst vmap drm/i915/cmdparser: Use cached vmappings drm/i915/cmdparser: Add the TIMESTAMP register for the other engines drm/i915/cmdparser: Make initialisation failure non-fatal drm/i915: Stop discarding GTT cache-domain on unbind vma ...
2016-08-19drm/i915: Use remap_io_mapping() to prefault all PTE in a single passChris Wilson1-1/+1
Very old numbers indicate this is a 66% improvement when remapping the entire object for fence contention - due to the elimination of track_pfn_insert and its strcmp. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Testcase: igt/gem_fence_upload/performance Testcase: igt/gem_mmap_gtt Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20160819155428.1670-6-chris@chris-wilson.co.uk
2016-08-16drm/doc: Include new drm_blend.cDaniel Vetter1-2/+2
There's not much point in kerneldoc if it's not included: - It won't show up in the pretty html pages. - The comments itself won't get parsed, which means 0day won't pick up changes, resulting in stale docs fast. Also, uapi really should be core, not helpers, so move drm_blend.c to that. That also means that the zpos normilize function loses it's helper status (and we might as well call it always). For that, EXPORT_SYMBOL. Just spotted while integrating docs and noticing that one was missing. With sphinx there's really no excuse any more to not build the docs and make sure it's all nice! $ make DOCBOOKS="" htmldocs Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1471034937-651-15-git-send-email-daniel.vetter@ffwll.ch
2016-08-16drm: Extract drm_connector.[hc]Daniel Vetter1-1/+1
Pulls in quite a lot of connector related structures (cmdline mode, force/status enums, display info), but I think that all makes perfect sense. Also had to move a few more core kms object stuff into drm_modeset.h. And as a first cleanup remove the kerneldoc for the 2 connector IOCTL - DRM core docs are aimed at drivers, no point documenting internal in excruciating detail. v2: And also pull in all the connector property code. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1471034937-651-14-git-send-email-daniel.vetter@ffwll.ch
2016-08-16drm: Extract drm_framebuffer.[hc]Daniel Vetter1-1/+2
Also start with drm_modeset.h with the core bits, since we need to untangle this mess somehow. That allows us to move the drm_modes.h include to the right spot, except for the temporary connector status enum. That will get fixed as soon as drm_connector.h exists. v2: Rebase. v3: Move drm_crtc_force_disable_all back again, that wasn't meant to be moved (Sean). v4: Rebase. Cc: Sean Paul <seanpaul@chromium.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2016-08-16drm/kms-helpers: Extract drm_modeset_helper.[hc]Daniel Vetter1-1/+1
While reviewing docs I spotted that we have a few functions that really just don't fit into their containing helper library section. Extract them and shovel them all into a new library for random one-off aux stuff. v2: Remove wrongly added files for real. Cc: Sean Paul <seanpaul@chromium.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1471034937-651-3-git-send-email-daniel.vetter@ffwll.ch
2016-07-29drm: add generic zpos propertyMarek Szyprowski1-1/+1
version 8: - move drm_blend.o from drm-y to drm_kms_helper-y to avoid EXPORT_SYMBOL(drm_atomic_helper_normalize_zpos) - remove dead function declarations in drm_crtc.h version 7: - remove useless EXPORT_SYMBOL() - better z-order wording in Documentation version 6: - add zpos in gpu documentation file - merge Ville patch about zpos initial value and API improvement. I have split Ville patch between zpos core and drivers version 5: - remove zpos range check and comeback to 0 to N-1 normalization algorithm version 4: - make sure that normalized zpos value is stay in the defined property range and warn user if not This patch adds support for generic plane's zpos property property with well-defined semantics: - added zpos properties to plane and plane state structures - added helpers for normalizing zpos properties of given set of planes - well defined semantics: planes are sorted by zpos values and then plane id value if zpos equals Normalized zpos values are calculated automatically when generic muttable zpos property has been initialized. Drivers can simply use plane_state->normalized_zpos in their atomic_check and/or plane_update callbacks without any additional calls to DRM core. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Compare to Marek's original patch zpos property is now specific to each plane and no more to the core. Normalize function take care of the range of per plane defined range before set normalized_zpos. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Inki Dae <inki.dae@samsung.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Joonyoung Shim <jy0922.shim@samsung.com> Cc: Seung-Woo Kim <sw0312.kim@samsung.com> Cc: Andrzej Hajda <a.hajda@samsung.com> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: vincent.abriou@st.com Cc: fabien.dessenne@st.com Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2016-06-10drm: Add helper for simple display pipelineNoralf Trønnes1-1/+2
Provides helper functions for drivers that have a simple display pipeline. Plane, crtc and encoder are collapsed into one entity. Changes since v4: - Remove drm_connector_register() call - Forgot to assign pipe->connector Changes since v3: - (struct drm_simple_display_pipe *)->funcs should be const Changes since v2: - Drop Kconfig knob DRM_KMS_HELPER - Expand documentation Changes since v1: - Add DOC header and add to gpu.tmpl - Fix docs: @funcs is optional, "negative error code", "This hook is optional." - Add checks to drm_simple_kms_plane_atomic_check() Cc: jsarha@ti.com Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465570559-14238-1-git-send-email-noralf@tronnes.org
2016-06-09drm: Move format-related helpers to drm_fourcc.cLaurent Pinchart1-1/+1
The drm_crtc.c file is a mess, making the ABI documentation confusing since all functions are in the same bag. Split the format-related helpers to a new drm_fourcc.c file. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465466048-2020-1-git-send-email-laurent.pinchart@ideasonboard.com
2016-05-27Merge tag 'drm-intel-next-fixes-2016-05-25' of ↵Dave Airlie1-1/+1
git://anongit.freedesktop.org/drm-intel into drm-next I see the main drm pull got merged, here's the first batch of fixes for 4.7 already. Fixes all around, a large portion cc: stable stuff. [airlied: the DP++ stuff is a regression fix]. * tag 'drm-intel-next-fixes-2016-05-25' of git://anongit.freedesktop.org/drm-intel: drm/i915: Stop automatically retiring requests after a GPU hang drm/i915: Unify intel_ring_begin() drm/i915: Ignore stale wm register values on resume on ilk-bdw (v2) drm/i915/psr: Try to program link training times correctly drm/i915/bxt: Adjusting the error in horizontal timings retrieval drm/i915: Don't leave old junk in ilk active watermarks on readout drm/i915: s/DPPL/DPLL/ for SKL DPLLs drm/i915: Fix gen8 semaphores id for legacy mode drm/i915: Set crtc_state->lane_count for HDMI drm/i915/BXT: Retrieving the horizontal timing for DSI drm/i915: Protect gen7 irq_seqno_barrier with uncore lock drm/i915: Re-enable GGTT earlier during resume on pre-gen6 platforms drm/i915: Determine DP++ type 1 DVI adaptor presence based on VBT drm/i915: Enable/disable TMDS output buffers in DP++ adaptor as needed drm/i915: Respect DP++ adaptor TMDS clock limit drm: Add helper for DP++ adaptors
2016-05-23drm: Add helper for DP++ adaptorsVille Syrjälä1-1/+1
Add a helper which aids in the identification of DP dual mode (aka. DP++) adaptors. There are several types of adaptors specified: type 1 DVI, type 1 HDMI, type 2 DVI, type 2 HDMI Type 1 adaptors have a max TMDS clock limit of 165MHz, type 2 adaptors may go as high as 300MHz and they provide a register informing the source device what the actual limit is. Supposedly also type 1 adaptors may optionally implement this register. This TMDS clock limit is the main reason why we need to identify these adaptors. Type 1 adaptors provide access to their internal registers and the sink DDC bus through I2C. Type 2 adaptors provide this access both via I2C and I2C-over-AUX. A type 2 source device may choose to implement either of these methods. If a source device implements the I2C-over-AUX method, then the driver will obviously need specific support for such adaptors since the port is driven like an HDMI port, but DDC communication happes over the AUX channel. This helper should be enough to identify the adaptor type (some type 1 DVI adaptors may be a slight exception) and the maximum TMDS clock limit. Another feature that may be available is control over the TMDS output buffers on the adaptor, possibly allowing for some power saving when the TMDS link is down. Other user controllable features that may be available in the adaptors are downstream i2c bus speed control when using i2c-over-aux, and some control over the CEC pin. I chose not to provide any helper functions for those since I have no use for them in i915 at this time. The rest of the registers in the adaptor are mostly just information, eg. IEEE OUI, hardware and firmware revision, etc. v2: Pass adaptor type to helper functions to ease driver implementation Fix a bunch of typoes (Paulo) Add DRM_DP_DUAL_MODE_UNKNOWN for the case where we don't (yet) know the type (Paulo) Reject 0x00 and 0xff DP_DUAL_MODE_MAX_TMDS_CLOCK values (Paulo) Adjust drm_dp_dual_mode_detect() type2 vs. type1 detection to ease future LSPCON enabling Remove the unused DP_DUAL_MODE_LAST_RESERVED define v3: Fix kernel doc function argument descriptions (Jani) s/NONE/UNKNOWN/ in drm_dp_dual_mode_detect() docs Add kernel doc for enum drm_dp_dual_mode_type Actually build the docs Fix more typoes v4: Adjust code indentation of type2 adaptor detection (Shashank) Add debug messages for failurs cases (Shashank) v5: EXPORT_SYMBOL(drm_dp_dual_mode_read) (Paulo) Cc: stable@vger.kernel.org Cc: Tore Anderson <tore@fud.no> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> (v4) Link: http://patchwork.freedesktop.org/patch/msgid/1462542412-25533-1-git-send-email-ville.syrjala@linux.intel.com (cherry picked from commit ede53344dbfd1dd43bfd73eb6af743d37c56a7c3) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-05-06drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.CK Hu1-0/+1
This patch adds an initial DRM driver for the Mediatek MT8173 DISP subsystem. It currently supports two fixed output streams from the OVL0/OVL1 sources to the DSI0/DPI0 sinks, respectively. Signed-off-by: CK Hu <ck.hu@mediatek.com> Signed-off-by: YT Shen <yt.shen@mediatek.com> Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com> Signed-off-by: Mao Huang <littlecvr@chromium.org> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2016-04-29drm/hisilicon: Add hisilicon kirin drm master driverXinliang Liu1-0/+1
Add kirin DRM master driver for hi6220 SoC which used in HiKey board. Add dumb buffer feature. Add prime dmabuf feature. v9: Add OF and ARM64 depends on in Kconfig v8: None. v7: - Add config.mutex protection when accessing mode_config.connector_list. - Clean up match data getting. v6: None. v5: None. v4: None. v3: - Move and rename all the files to kirin sub-directory. So that we could separate different seires SoCs' driver. - Replace drm_platform_init, load, unload implementation. v2: - Remove abtraction layer. Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org> Signed-off-by: Xinwei Kong <kong.kongxinwei@hisilicon.com>
2016-04-28drm: Add Allwinner A10 Display Engine supportMaxime Ripard1-1/+2
The Allwinner A10 and subsequent SoCs share the same display pipeline, with variations in the number of controllers (1 or 2), or the presence or not of some output (HDMI, TV, VGA) or not. Add a driver with a limited set of features for now, and we will hopefully support all of them eventually Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2016-04-26drm: Add support of ARC PGU display controllerCarlos Palminha1-0/+1
ARC PGU could be found on some development boards from Synopsys. This is a simple byte streamer that reads data from a framebuffer and sends data to the single encoder. Signed-off-by: Carlos Palminha <palminha@synopsys.com> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: David Airlie <airlied@linux.ie> Cc: dri-devel@lists.freedesktop.org Cc: linux-snps-arc@lists.infradead.org
2016-02-19Merge tag 'topic/drm-misc-2016-02-18' of ↵Dave Airlie1-1/+4
git://anongit.freedesktop.org/drm-intel into drm-next Misc stuff all over: - more mode_fixup removal from Carlos, there's another final pile still left. - final bits of vgaswitcheroo from Lukas for apple gmux, we're still discussing an api cleanup patch to make it a bit more abuse-safe as a follow-up - dp aux interface for userspace for tools&tests from Rafael Antognolli - actual interface parts for dma-buf flushing for userspace mmap - few small bits all over - vgaswitcheroo support for apple gmux from Lukas Wunner - checks for ->mode_fixup in non-atomic helpers from Carlos Palminha, plus removing dummy funcs from drivers. Carlos promised to follow up with more, since there's lots more silly dummy functions around. - dma-buf patches from Tiago, except the ioctl itself (that needed a respin to address review from David Herrmann) - encoder mask for atomic from Maarten - bunch of random things all over. * tag 'topic/drm-misc-2016-02-18' of git://anongit.freedesktop.org/drm-intel: (57 commits) drm/udl: Use module_usb_driver drm: fixes crct set_mode when crtc mode_fixup is null. drm/tilcdc: removed optional dummy encoder mode_fixup function. drm/sti: removed optional dummy encoder mode_fixup function. drm/rockchip: removed optional dummy encoder mode_fixup function. drm/qxl: removed optional dummy encoder mode_fixup function. drm/mgag200: removed optional dummy encoder mode_fixup function. drm/msm/mdp: removed optional dummy encoder mode_fixup function. drm/imx: removed optional dummy encoder mode_fixup function. drm/gma500: removed optional dummy encoder mode_fixup function. drm/radeon: removed optional dummy encoder mode_fixup function. drm/cirrus: removed optional dummy encoder mode_fixup function. drm/bochs: removed optional dummy encoder mode_fixup function. drm/ast: removed optional dummy encoder mode_fixup function. drm/amdgpu: removed optional dummy encoder mode_fixup function. drm/exynos: removed optional dummy encoder mode_fixup function. drm/udl: removed optional dummy encoder mode_fixup function. drm/virtio: removed optional dummy encoder mode_fixup function. drm/fb_helper: Use add_one_connector in add_all_connectors. drm/fb_helper: Use correct allocation count for arrays. ...
2016-02-12drm/dp: Add a drm_aux-dev module for reading/writing dpcd registers.Rafael Antognolli1-0/+1
This module is heavily based on i2c-dev. Once loaded, it provides one dev node per DP AUX channel, named drm_dp_auxN, where N is an integer. It's possible to know which connector owns this aux channel by looking at the respective sysfs /sys/class/drm_aux_dev/drm_dp_auxN/connector, if the connector device pointer was correctly set in the aux helper struct. Two main operations are provided on the registers read and write. The address of the register to be read or written is given using lseek. The seek position is updated upon read or write. v2: - lseek is used to select the register to read/write - read/write are used instead of ioctl - no blocking_notifier is used, just a direct callback v3: - use drm_dp_aux_dev prefix for public functions - chardev is named drm_dp_auxN - read/write don't allocate a buffer anymore, and transfer up to 16 bytes a time - remove notifier list from the implementation - option on menuconfig is now a boolean - add inline stub functions to avoid breakage when this option is disabled v4: - fix build system changes - actually disable this module when not selected. v5: - Use kref to avoid device closing while still in use - Don't use list, use an idr for storing aux_dev - Remove "connector" attribute - set aux.dev to the connector drm_connector device, instead of drm_device v6: - Use atomic_t for usage count - Use a mutex instead of spinlock for idr lock - Destroy chardev immediately on unregister - other minor suggestions from Ville v7: - style fixes - error handling fixes v8: - more error handling fixes v9: - remove module_init and module_exit, and add drm_dp_aux_dev_init/exit to drm_kms_helper_init/exit. Signed-off-by: Rafael Antognolli <rafael.antognolli@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1453417821-2811-3-git-send-email-rafael.antognolli@intel.com
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