From 1c248b7d2960faec3e1b8f3f9c5d9d0df28e0a3c Mon Sep 17 00:00:00 2001 From: Inki Dae Date: Tue, 4 Oct 2011 19:19:01 +0900 Subject: DRM: add DRM Driver for Samsung SoC EXYNOS4210. This patch is a DRM Driver for Samsung SoC Exynos4210 and now enables only FIMD yet but we will add HDMI support also in the future. this patch is based on git repository below: git://people.freedesktop.org/~airlied/linux.git branch name: drm-next commit-id: 88ef4e3f4f616462b78a7838eb3ffc3818d30f67 you can refer to our working repository below: http://git.infradead.org/users/kmpark/linux-2.6-samsung branch name: samsung-drm We tried to re-use lowlevel codes of the FIMD driver(s3c-fb.c based on Linux framebuffer) but couldn't so because lowlevel codes of s3c-fb.c are included internally and so FIMD module of this driver has its own lowlevel codes. We used GEM framework for buffer management and DMA APIs(dma_alloc_*) for buffer allocation so we can allocate physically continuous memory for DMA through it and also we could use CMA later if CMA is applied to mainline. Refer to this link for CMA(Continuous Memory Allocator): http://lkml.org/lkml/2011/7/20/45 this driver supports only physically continuous memory(non-iommu). Links to previous versions of the patchset: v1: < https://lwn.net/Articles/454380/ > v2: < http://www.spinics.net/lists/kernel/msg1224275.html > v3: < http://www.spinics.net/lists/dri-devel/msg13755.html > v4: < http://permalink.gmane.org/gmane.comp.video.dri.devel/60439 > v5: < http://comments.gmane.org/gmane.comp.video.dri.devel/60802 > Changelog v2: DRM: add DRM_IOCTL_SAMSUNG_GEM_MMAP ioctl command. this feature maps user address space to physical memory region once user application requests DRM_IOCTL_SAMSUNG_GEM_MMAP ioctl. DRM: code clean and add exception codes. Changelog v3: DRM: Support multiple irq. FIMD and HDMI have their own irq handler but DRM Framework can regiter only one irq handler this patch supports mutiple irq for Samsung SoC. DRM: Consider modularization. each DRM, FIMD could be built as a module. DRM: Have indenpendent crtc object. crtc isn't specific to SoC Platform so this patch gets a crtc to be used as common object. created crtc could be attached to any encoder object. DRM: code clean and add exception codes. Changelog v4: DRM: remove is_defult from samsung_fb. is_default isn't used for default framebuffer. DRM: code refactoring to fimd module. this patch is be considered with multiple display objects and would use its own request_irq() to register a irq handler instead of drm framework's one. DRM: remove find_samsung_drm_gem_object() DRM: move kernel private data structures and definitions to driver folder. samsung_drm.h would contain only public information for userspace ioctl interface. DRM: code refactoring to gem modules. buffer module isn't dependent of gem module anymore. DRM: fixed security issue. DRM: remove encoder porinter from specific connector. samsung connector doesn't need to have generic encoder. DRM: code clean and add exception codes. Changelog v5: DRM: updated fimd(display controller) driver. added various pixel formats, color key and pixel blending features. DRM: removed end_buf_off from samsung_drm_overlay structure. this variable isn't used and end buffer address would be calculated by each sub driver. DRM: use generic function for mmap_offset. replaced samsung_drm_gem_create_mmap_offset() and samsung_drm_free_mmap_offset() with generic ones applied to mainline recentrly. DRM: removed unnecessary codes and added exception codes. DRM: added comments and code clean. Changelog v6: DRM: added default config options. DRM: added padding for 64-bit align. DRM: changed prefix 'samsung' to 'exynos' Signed-off-by: Inki Dae Signed-off-by: Joonyoung Shim Signed-off-by: Seung-Woo Kim Signed-off-by: Kyungmin Park Reviewed-by: Konrad Rzeszutek Wilk Reviewed-by: Dave Airlie Reviewed-by: Rob Clark Signed-off-by: Dave Airlie --- include/drm/exynos_drm.h | 104 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 include/drm/exynos_drm.h (limited to 'include/drm/exynos_drm.h') diff --git a/include/drm/exynos_drm.h b/include/drm/exynos_drm.h new file mode 100644 index 00000000000..874c4d27132 --- /dev/null +++ b/include/drm/exynos_drm.h @@ -0,0 +1,104 @@ +/* exynos_drm.h + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * Authors: + * Inki Dae + * Joonyoung Shim + * Seung-Woo Kim + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef _EXYNOS_DRM_H_ +#define _EXYNOS_DRM_H_ + +/** + * User-desired buffer creation information structure. + * + * @size: requested size for the object. + * - this size value would be page-aligned internally. + * @flags: user request for setting memory type or cache attributes. + * @handle: returned handle for the object. + */ +struct drm_exynos_gem_create { + unsigned int size; + unsigned int flags; + unsigned int handle; +}; + +/** + * A structure for getting buffer offset. + * + * @handle: a pointer to gem object created. + * @pad: just padding to be 64-bit aligned. + * @offset: relatived offset value of the memory region allocated. + * - this value should be set by user. + */ +struct drm_exynos_gem_map_off { + unsigned int handle; + unsigned int pad; + uint64_t offset; +}; + +/** + * A structure for mapping buffer. + * + * @handle: a handle to gem object created. + * @size: memory size to be mapped. + * @mapped: having user virtual address mmaped. + * - this variable would be filled by exynos gem module + * of kernel side with user virtual address which is allocated + * by do_mmap(). + */ +struct drm_exynos_gem_mmap { + unsigned int handle; + unsigned int size; + uint64_t mapped; +}; + +#define DRM_EXYNOS_GEM_CREATE 0x00 +#define DRM_EXYNOS_GEM_MAP_OFFSET 0x01 +#define DRM_EXYNOS_GEM_MMAP 0x02 + +#define DRM_IOCTL_EXYNOS_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + \ + DRM_EXYNOS_GEM_CREATE, struct drm_exynos_gem_create) + +#define DRM_IOCTL_EXYNOS_GEM_MAP_OFFSET DRM_IOWR(DRM_COMMAND_BASE + \ + DRM_EXYNOS_GEM_MAP_OFFSET, struct drm_exynos_gem_map_off) + +#define DRM_IOCTL_EXYNOS_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + \ + DRM_EXYNOS_GEM_MMAP, struct drm_exynos_gem_mmap) + +/** + * Platform Specific Structure for DRM based FIMD. + * + * @timing: default video mode for initializing + * @default_win: default window layer number to be used for UI. + * @bpp: default bit per pixel. + */ +struct exynos_drm_fimd_pdata { + struct fb_videomode timing; + u32 vidcon0; + u32 vidcon1; + unsigned int default_win; + unsigned int bpp; +}; + +#endif -- cgit v1.2.3-70-g09d2