[RFC 0/1] drm/pl111: Initial drm/kms driver for pl111

From: Tom Cooksey <tom.cooksey at arm.com> Please find below the current state of our pl111 DRM/KMS driver. This is lightly tested on a Versatile Express using X running the xf86-video-armsoc DDX driver[i] with the patches applied to drm-next as of ~last week. To actually see anything on the DVI output, you must also apply Pawel Moll's VExpress DVI mux driver[ii] to select the video signal from the ca9x4 core tile. [i] <https://git.linaro.org/gitweb?p=arm/xorg/driver/xf86-video-armsoc.git;a=summary> [ii] <https://patchwork.kernel.org/patch/1765981/> Known issues: * It uses KDS. We intend to switch to whatever implicit per-buffer synchronisation mechanism gets merged, once something is merged. * It abuses flags parameter of DRM_IOCTL_MODE_CREATE_DUMB to also allocate buffers for the GPU. Still not sure how to resolve this as we don't use DRM for our GPU driver. * Doesn't handle page flip event sequence numbers and timestamps * The v_sync handling needs work in general - a work queue is a little overkill * Doesn't support the import half of PRIME properly, only export * Need to validate src rectangle size in pl111_drm_cursor_plane_update() * Only supports 640x480 mode, which is hard-coded. We intend to rebase on top of CDF once it is merged, which hopefully will handle a lot of the EDID parsing & mode setting for us (once Pawel's CDF patches for VExpress also land). I appreciate that's a fairly hefty list of known issues already! However, we're waiting for both CDF & dma_buf sync mechanisms to land before we can address some of those. So in the mean-time, I thought someone might be interested in taking a look at what we have so far, which is why I'm posting this now. Needless to say the code will need to be refactored a fair bit, however I'm keen to get and additional feedback anyone cares to give. Cheers, Tom Tom Cooksey (1): drm/pl111: Initial drm/kms driver for pl111 display controller drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/pl111/Kbuild | 14 + drivers/gpu/drm/pl111/Kconfig | 9 + drivers/gpu/drm/pl111/pl111_clcd_ext.h | 78 ++++ drivers/gpu/drm/pl111/pl111_drm.h | 227 ++++++++++++ drivers/gpu/drm/pl111/pl111_drm_connector.c | 166 +++++++++ drivers/gpu/drm/pl111/pl111_drm_crtc.c | 432 ++++++++++++++++++++++ drivers/gpu/drm/pl111/pl111_drm_cursor.c | 97 +++++ drivers/gpu/drm/pl111/pl111_drm_device.c | 319 +++++++++++++++++ drivers/gpu/drm/pl111/pl111_drm_dma_buf.c | 339 ++++++++++++++++++ drivers/gpu/drm/pl111/pl111_drm_encoder.c | 106 ++++++ drivers/gpu/drm/pl111/pl111_drm_fb.c | 152 ++++++++ drivers/gpu/drm/pl111/pl111_drm_funcs.h | 127 +++++++ drivers/gpu/drm/pl111/pl111_drm_gem.c | 287 +++++++++++++++ drivers/gpu/drm/pl111/pl111_drm_pl111.c | 513 +++++++++++++++++++++++++++ drivers/gpu/drm/pl111/pl111_drm_platform.c | 150 ++++++++ drivers/gpu/drm/pl111/pl111_drm_suspend.c | 35 ++ drivers/gpu/drm/pl111/pl111_drm_vma.c | 214 +++++++++++ 19 files changed, 3268 insertions(+) create mode 100644 drivers/gpu/drm/pl111/Kbuild create mode 100644 drivers/gpu/drm/pl111/Kconfig create mode 100644 drivers/gpu/drm/pl111/pl111_clcd_ext.h create mode 100644 drivers/gpu/drm/pl111/pl111_drm.h create mode 100644 drivers/gpu/drm/pl111/pl111_drm_connector.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_crtc.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_cursor.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_device.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_dma_buf.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_encoder.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_fb.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_funcs.h create mode 100644 drivers/gpu/drm/pl111/pl111_drm_gem.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_pl111.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_platform.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_suspend.c create mode 100644 drivers/gpu/drm/pl111/pl111_drm_vma.c -- 1.7.9.5