On Fri, Sep 23, 2011 at 7:55 AM, Inki Dae <inki.dae@xxxxxxxxxxx> wrote: > 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.gossamer-threads.com/lists/linux/kernel/1423684 > > v4: < http://permalink.gmane.org/gmane.comp.video.dri.devel/60439 > > > 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. > > Changlog 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. > > Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx> > Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx> > Signed-off-by: SeungWoo Kim <sw0312.kim@xxxxxxxxxxx> > Signed-off-by: kyungmin.park <kyungmin.park@xxxxxxxxxxx> Reviewed-by: Rob Clark <rob.clark@xxxxxxxxxx>' BR, -R _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
