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>tirimbino
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9ca70356a9
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========================== |
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drm/tinydrm Driver library |
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========================== |
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|
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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c |
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:doc: overview |
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Core functionality |
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================== |
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|
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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c |
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:doc: core |
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|
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.. kernel-doc:: include/drm/tinydrm/tinydrm.h |
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:internal: |
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|
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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c |
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:export: |
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|
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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c |
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:export: |
@ -0,0 +1,8 @@ |
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menuconfig DRM_TINYDRM |
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tristate "Support for simple displays" |
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depends on DRM |
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select DRM_KMS_HELPER |
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select DRM_KMS_CMA_HELPER |
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help |
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Choose this option if you have a tinydrm supported display. |
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If M is selected the module will be called tinydrm. |
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obj-$(CONFIG_DRM_TINYDRM) += core/
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tinydrm-y := tinydrm-core.o tinydrm-pipe.o
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obj-$(CONFIG_DRM_TINYDRM) += tinydrm.o
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@ -0,0 +1,376 @@ |
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/*
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* Copyright (C) 2016 Noralf Trønnes |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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*/ |
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|
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#include <drm/drm_atomic.h> |
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#include <drm/drm_atomic_helper.h> |
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#include <drm/drm_crtc_helper.h> |
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#include <drm/tinydrm/tinydrm.h> |
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#include <linux/device.h> |
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#include <linux/dma-buf.h> |
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/**
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* DOC: overview |
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* |
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* This library provides driver helpers for very simple display hardware. |
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* |
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* It is based on &drm_simple_display_pipe coupled with a &drm_connector which |
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* has only one fixed &drm_display_mode. The framebuffers are backed by the |
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* cma helper and have support for framebuffer flushing (dirty). |
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* fbdev support is also included. |
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* |
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*/ |
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|
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/**
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* DOC: core |
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* |
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* The driver allocates &tinydrm_device, initializes it using |
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* devm_tinydrm_init(), sets up the pipeline using tinydrm_display_pipe_init() |
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* and registers the DRM device using devm_tinydrm_register(). |
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*/ |
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|
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/**
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* tinydrm_lastclose - DRM lastclose helper |
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* @drm: DRM device |
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* |
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* This function ensures that fbdev is restored when drm_lastclose() is called |
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* on the last drm_release(). Drivers can use this as their |
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* &drm_driver->lastclose callback. |
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*/ |
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void tinydrm_lastclose(struct drm_device *drm) |
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{ |
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struct tinydrm_device *tdev = drm->dev_private; |
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DRM_DEBUG_KMS("\n"); |
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drm_fbdev_cma_restore_mode(tdev->fbdev_cma); |
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} |
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EXPORT_SYMBOL(tinydrm_lastclose); |
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|
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/**
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* tinydrm_gem_cma_prime_import_sg_table - Produce a CMA GEM object from |
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* another driver's scatter/gather table of pinned pages |
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* @drm: DRM device to import into |
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* @attach: DMA-BUF attachment |
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* @sgt: Scatter/gather table of pinned pages |
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* |
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* This function imports a scatter/gather table exported via DMA-BUF by |
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* another driver using drm_gem_cma_prime_import_sg_table(). It sets the |
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* kernel virtual address on the CMA object. Drivers should use this as their |
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* &drm_driver->gem_prime_import_sg_table callback if they need the virtual |
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* address. tinydrm_gem_cma_free_object() should be used in combination with |
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* this function. |
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* |
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* Returns: |
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* A pointer to a newly created GEM object or an ERR_PTR-encoded negative |
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* error code on failure. |
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*/ |
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struct drm_gem_object * |
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tinydrm_gem_cma_prime_import_sg_table(struct drm_device *drm, |
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struct dma_buf_attachment *attach, |
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struct sg_table *sgt) |
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{ |
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struct drm_gem_cma_object *cma_obj; |
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struct drm_gem_object *obj; |
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void *vaddr; |
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vaddr = dma_buf_vmap(attach->dmabuf); |
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if (!vaddr) { |
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DRM_ERROR("Failed to vmap PRIME buffer\n"); |
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return ERR_PTR(-ENOMEM); |
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} |
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obj = drm_gem_cma_prime_import_sg_table(drm, attach, sgt); |
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if (IS_ERR(obj)) { |
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dma_buf_vunmap(attach->dmabuf, vaddr); |
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return obj; |
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} |
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cma_obj = to_drm_gem_cma_obj(obj); |
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cma_obj->vaddr = vaddr; |
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return obj; |
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} |
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EXPORT_SYMBOL(tinydrm_gem_cma_prime_import_sg_table); |
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/**
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* tinydrm_gem_cma_free_object - Free resources associated with a CMA GEM |
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* object |
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* @gem_obj: GEM object to free |
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* |
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* This function frees the backing memory of the CMA GEM object, cleans up the |
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* GEM object state and frees the memory used to store the object itself using |
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* drm_gem_cma_free_object(). It also handles PRIME buffers which has the kernel |
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* virtual address set by tinydrm_gem_cma_prime_import_sg_table(). Drivers |
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* can use this as their &drm_driver->gem_free_object callback. |
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*/ |
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void tinydrm_gem_cma_free_object(struct drm_gem_object *gem_obj) |
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{ |
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if (gem_obj->import_attach) { |
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struct drm_gem_cma_object *cma_obj; |
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cma_obj = to_drm_gem_cma_obj(gem_obj); |
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dma_buf_vunmap(gem_obj->import_attach->dmabuf, cma_obj->vaddr); |
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cma_obj->vaddr = NULL; |
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} |
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drm_gem_cma_free_object(gem_obj); |
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} |
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EXPORT_SYMBOL_GPL(tinydrm_gem_cma_free_object); |
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const struct file_operations tinydrm_fops = { |
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.owner = THIS_MODULE, |
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.open = drm_open, |
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.release = drm_release, |
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.unlocked_ioctl = drm_ioctl, |
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#ifdef CONFIG_COMPAT |
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.compat_ioctl = drm_compat_ioctl, |
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#endif |
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.poll = drm_poll, |
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.read = drm_read, |
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.llseek = no_llseek, |
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.mmap = drm_gem_cma_mmap, |
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}; |
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EXPORT_SYMBOL(tinydrm_fops); |
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static struct drm_framebuffer * |
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tinydrm_fb_create(struct drm_device *drm, struct drm_file *file_priv, |
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const struct drm_mode_fb_cmd2 *mode_cmd) |
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{ |
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struct tinydrm_device *tdev = drm->dev_private; |
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return drm_fb_cma_create_with_funcs(drm, file_priv, mode_cmd, |
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tdev->fb_funcs); |
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} |
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static const struct drm_mode_config_funcs tinydrm_mode_config_funcs = { |
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.fb_create = tinydrm_fb_create, |
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.atomic_check = drm_atomic_helper_check, |
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.atomic_commit = drm_atomic_helper_commit, |
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}; |
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static int tinydrm_init(struct device *parent, struct tinydrm_device *tdev, |
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const struct drm_framebuffer_funcs *fb_funcs, |
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struct drm_driver *driver) |
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{ |
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struct drm_device *drm; |
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mutex_init(&tdev->dirty_lock); |
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tdev->fb_funcs = fb_funcs; |
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/*
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* We don't embed drm_device, because that prevent us from using |
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* devm_kzalloc() to allocate tinydrm_device in the driver since |
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* drm_dev_unref() frees the structure. The devm_ functions provide |
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* for easy error handling. |
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*/ |
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drm = drm_dev_alloc(driver, parent); |
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if (IS_ERR(drm)) |
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return PTR_ERR(drm); |
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tdev->drm = drm; |
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drm->dev_private = tdev; |
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drm_mode_config_init(drm); |
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drm->mode_config.funcs = &tinydrm_mode_config_funcs; |
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return 0; |
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} |
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static void tinydrm_fini(struct tinydrm_device *tdev) |
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{ |
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drm_mode_config_cleanup(tdev->drm); |
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mutex_destroy(&tdev->dirty_lock); |
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tdev->drm->dev_private = NULL; |
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drm_dev_unref(tdev->drm); |
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} |
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static void devm_tinydrm_release(void *data) |
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{ |
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tinydrm_fini(data); |
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} |
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/**
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* devm_tinydrm_init - Initialize tinydrm device |
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* @parent: Parent device object |
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* @tdev: tinydrm device |
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* @fb_funcs: Framebuffer functions |
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* @driver: DRM driver |
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* |
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* This function initializes @tdev, the underlying DRM device and it's |
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* mode_config. Resources will be automatically freed on driver detach (devres) |
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* using drm_mode_config_cleanup() and drm_dev_unref(). |
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* |
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* Returns: |
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* Zero on success, negative error code on failure. |
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*/ |
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int devm_tinydrm_init(struct device *parent, struct tinydrm_device *tdev, |
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const struct drm_framebuffer_funcs *fb_funcs, |
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struct drm_driver *driver) |
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{ |
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int ret; |
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ret = tinydrm_init(parent, tdev, fb_funcs, driver); |
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if (ret) |
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return ret; |
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ret = devm_add_action(parent, devm_tinydrm_release, tdev); |
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if (ret) |
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tinydrm_fini(tdev); |
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return ret; |
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} |
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EXPORT_SYMBOL(devm_tinydrm_init); |
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static int tinydrm_register(struct tinydrm_device *tdev) |
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{ |
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struct drm_device *drm = tdev->drm; |
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int bpp = drm->mode_config.preferred_depth; |
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struct drm_fbdev_cma *fbdev; |
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int ret; |
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ret = drm_dev_register(tdev->drm, 0); |
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if (ret) |
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return ret; |
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fbdev = drm_fbdev_cma_init_with_funcs(drm, bpp ? bpp : 32, |
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drm->mode_config.num_connector, |
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tdev->fb_funcs); |
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if (IS_ERR(fbdev)) |
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DRM_ERROR("Failed to initialize fbdev: %ld\n", PTR_ERR(fbdev)); |
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else |
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tdev->fbdev_cma = fbdev; |
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return 0; |
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} |
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static void tinydrm_unregister(struct tinydrm_device *tdev) |
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{ |
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struct drm_fbdev_cma *fbdev_cma = tdev->fbdev_cma; |
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drm_crtc_force_disable_all(tdev->drm); |
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/* don't restore fbdev in lastclose, keep pipeline disabled */ |
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tdev->fbdev_cma = NULL; |
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drm_dev_unregister(tdev->drm); |
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if (fbdev_cma) |
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drm_fbdev_cma_fini(fbdev_cma); |
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} |
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static void devm_tinydrm_register_release(void *data) |
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{ |
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tinydrm_unregister(data); |
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} |
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/**
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* devm_tinydrm_register - Register tinydrm device |
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* @tdev: tinydrm device |
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* |
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* This function registers the underlying DRM device and fbdev. |
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* These resources will be automatically unregistered on driver detach (devres) |
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* and the display pipeline will be disabled. |
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* |
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* Returns: |
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* Zero on success, negative error code on failure. |
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*/ |
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int devm_tinydrm_register(struct tinydrm_device *tdev) |
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{ |
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struct device *dev = tdev->drm->dev; |
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int ret; |
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ret = tinydrm_register(tdev); |
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if (ret) |
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return ret; |
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ret = devm_add_action(dev, devm_tinydrm_register_release, tdev); |
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if (ret) |
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tinydrm_unregister(tdev); |
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return ret; |
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} |
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EXPORT_SYMBOL(devm_tinydrm_register); |
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/**
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* tinydrm_shutdown - Shutdown tinydrm |
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* @tdev: tinydrm device |
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* |
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* This function makes sure that the display pipeline is disabled. |
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* Used by drivers in their shutdown callback to turn off the display |
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* on machine shutdown and reboot. |
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*/ |
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void tinydrm_shutdown(struct tinydrm_device *tdev) |
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{ |
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drm_crtc_force_disable_all(tdev->drm); |
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} |
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EXPORT_SYMBOL(tinydrm_shutdown); |
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/**
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* tinydrm_suspend - Suspend tinydrm |
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* @tdev: tinydrm device |
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* |
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* Used in driver PM operations to suspend tinydrm. |
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* Suspends fbdev and DRM. |
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* Resume with tinydrm_resume(). |
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* |
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* Returns: |
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* Zero on success, negative error code on failure. |
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*/ |
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int tinydrm_suspend(struct tinydrm_device *tdev) |
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{ |
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struct drm_atomic_state *state; |
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if (tdev->suspend_state) { |
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DRM_ERROR("Failed to suspend: state already set\n"); |
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return -EINVAL; |
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} |
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drm_fbdev_cma_set_suspend_unlocked(tdev->fbdev_cma, 1); |
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state = drm_atomic_helper_suspend(tdev->drm); |
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if (IS_ERR(state)) { |
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drm_fbdev_cma_set_suspend_unlocked(tdev->fbdev_cma, 0); |
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return PTR_ERR(state); |
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} |
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tdev->suspend_state = state; |
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return 0; |
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} |
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EXPORT_SYMBOL(tinydrm_suspend); |
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/**
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* tinydrm_resume - Resume tinydrm |
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* @tdev: tinydrm device |
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* |
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* Used in driver PM operations to resume tinydrm. |
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* Suspend with tinydrm_suspend(). |
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* |
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* Returns: |
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* Zero on success, negative error code on failure. |
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*/ |
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int tinydrm_resume(struct tinydrm_device *tdev) |
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{ |
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struct drm_atomic_state *state = tdev->suspend_state; |
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int ret; |
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if (!state) { |
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DRM_ERROR("Failed to resume: state is not set\n"); |
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return -EINVAL; |
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} |
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tdev->suspend_state = NULL; |
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ret = drm_atomic_helper_resume(tdev->drm, state); |
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if (ret) { |
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DRM_ERROR("Error resuming state: %d\n", ret); |
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return ret; |
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} |
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drm_fbdev_cma_set_suspend_unlocked(tdev->fbdev_cma, 0); |
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return 0; |
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} |
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EXPORT_SYMBOL(tinydrm_resume); |
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MODULE_LICENSE("GPL"); |
@ -0,0 +1,234 @@ |
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/*
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* Copyright (C) 2016 Noralf Trønnes |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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*/ |
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#include <drm/drm_atomic_helper.h> |
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#include <drm/drm_crtc_helper.h> |
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#include <drm/drm_modes.h> |
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#include <drm/tinydrm/tinydrm.h> |
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struct tinydrm_connector { |
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struct drm_connector base; |
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const struct drm_display_mode *mode; |
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}; |
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static inline struct tinydrm_connector * |
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to_tinydrm_connector(struct drm_connector *connector) |
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{ |
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return container_of(connector, struct tinydrm_connector, base); |
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} |
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static int tinydrm_connector_get_modes(struct drm_connector *connector) |
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{ |
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struct tinydrm_connector *tconn = to_tinydrm_connector(connector); |
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struct drm_display_mode *mode; |
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mode = drm_mode_duplicate(connector->dev, tconn->mode); |
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if (!mode) { |
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DRM_ERROR("Failed to duplicate mode\n"); |
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return 0; |
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} |
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if (mode->name[0] == '\0') |
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drm_mode_set_name(mode); |
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mode->type |= DRM_MODE_TYPE_PREFERRED; |
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drm_mode_probed_add(connector, mode); |
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if (mode->width_mm) { |
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connector->display_info.width_mm = mode->width_mm; |
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connector->display_info.height_mm = mode->height_mm; |
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} |
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return 1; |
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} |
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static const struct drm_connector_helper_funcs tinydrm_connector_hfuncs = { |
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.get_modes = tinydrm_connector_get_modes, |
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.best_encoder = drm_atomic_helper_best_encoder, |
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}; |
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static enum drm_connector_status |
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tinydrm_connector_detect(struct drm_connector *connector, bool force) |
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{ |
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if (drm_device_is_unplugged(connector->dev)) |
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return connector_status_disconnected; |
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return connector->status; |
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} |
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static void tinydrm_connector_destroy(struct drm_connector *connector) |
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{ |
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struct tinydrm_connector *tconn = to_tinydrm_connector(connector); |
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drm_connector_cleanup(connector); |
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kfree(tconn); |
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} |
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static const struct drm_connector_funcs tinydrm_connector_funcs = { |
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.dpms = drm_atomic_helper_connector_dpms, |
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.reset = drm_atomic_helper_connector_reset, |
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.detect = tinydrm_connector_detect, |
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.fill_modes = drm_helper_probe_single_connector_modes, |
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.destroy = tinydrm_connector_destroy, |
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, |
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state, |
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}; |
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struct drm_connector * |
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tinydrm_connector_create(struct drm_device *drm, |
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const struct drm_display_mode *mode, |
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int connector_type) |
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{ |
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struct tinydrm_connector *tconn; |
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struct drm_connector *connector; |
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int ret; |
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tconn = kzalloc(sizeof(*tconn), GFP_KERNEL); |
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if (!tconn) |
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return ERR_PTR(-ENOMEM); |
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tconn->mode = mode; |
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connector = &tconn->base; |
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drm_connector_helper_add(connector, &tinydrm_connector_hfuncs); |
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ret = drm_connector_init(drm, connector, &tinydrm_connector_funcs, |
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connector_type); |
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if (ret) { |
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kfree(tconn); |
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return ERR_PTR(ret); |
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} |
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connector->status = connector_status_connected; |
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return connector; |
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} |
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/**
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* tinydrm_display_pipe_update - Display pipe update helper |
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* @pipe: Simple display pipe |
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* @old_state: Old plane state |
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* |
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* This function does a full framebuffer flush if the plane framebuffer |
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* has changed. It also handles vblank events. Drivers can use this as their |
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* &drm_simple_display_pipe_funcs->update callback. |
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*/ |
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void tinydrm_display_pipe_update(struct drm_simple_display_pipe *pipe, |
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struct drm_plane_state *old_state) |
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{ |
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struct tinydrm_device *tdev = pipe_to_tinydrm(pipe); |
||||
struct drm_framebuffer *fb = pipe->plane.state->fb; |
||||
struct drm_crtc *crtc = &tdev->pipe.crtc; |
||||
|
||||
if (fb && (fb != old_state->fb)) { |
||||
pipe->plane.fb = fb; |
||||
if (fb->funcs->dirty) |
||||
fb->funcs->dirty(fb, NULL, 0, 0, NULL, 0); |
||||
} |
||||
|
||||
if (crtc->state->event) { |
||||
spin_lock_irq(&crtc->dev->event_lock); |
||||
drm_crtc_send_vblank_event(crtc, crtc->state->event); |
||||
spin_unlock_irq(&crtc->dev->event_lock); |
||||
crtc->state->event = NULL; |
||||
} |
||||
} |
||||
EXPORT_SYMBOL(tinydrm_display_pipe_update); |
||||
|
||||
/**
|
||||
* tinydrm_display_pipe_prepare_fb - Display pipe prepare_fb helper |
||||
* @pipe: Simple display pipe |
||||
* @plane_state: Plane state |
||||
* |
||||
* This function uses drm_fb_cma_prepare_fb() to check if the plane FB has an |
||||
* dma-buf attached, extracts the exclusive fence and attaches it to plane |
||||
* state for the atomic helper to wait on. Drivers can use this as their |
||||
* &drm_simple_display_pipe_funcs->prepare_fb callback. |
||||
*/ |
||||
int tinydrm_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe, |
||||
struct drm_plane_state *plane_state) |
||||
{ |
||||
return drm_fb_cma_prepare_fb(&pipe->plane, plane_state); |
||||
} |
||||
EXPORT_SYMBOL(tinydrm_display_pipe_prepare_fb); |
||||
|
||||
static int tinydrm_rotate_mode(struct drm_display_mode *mode, |
||||
unsigned int rotation) |
||||
{ |
||||
if (rotation == 0 || rotation == 180) { |
||||
return 0; |
||||
} else if (rotation == 90 || rotation == 270) { |
||||
swap(mode->hdisplay, mode->vdisplay); |
||||
swap(mode->hsync_start, mode->vsync_start); |
||||
swap(mode->hsync_end, mode->vsync_end); |
||||
swap(mode->htotal, mode->vtotal); |
||||
swap(mode->width_mm, mode->height_mm); |
||||
return 0; |
||||
} else { |
||||
return -EINVAL; |
||||
} |
||||
} |
||||
|
||||
/**
|
||||
* tinydrm_display_pipe_init - Initialize display pipe |
||||
* @tdev: tinydrm device |
||||
* @funcs: Display pipe functions |
||||
* @connector_type: Connector type |
||||
* @formats: Array of supported formats (DRM_FORMAT\_\*) |
||||
* @format_count: Number of elements in @formats |
||||
* @mode: Supported mode |
||||
* @rotation: Initial @mode rotation in degrees Counter Clock Wise |
||||
* |
||||
* This function sets up a &drm_simple_display_pipe with a &drm_connector that |
||||
* has one fixed &drm_display_mode which is rotated according to @rotation. |
||||
* |
||||
* Returns: |
||||
* Zero on success, negative error code on failure. |
||||
*/ |
||||
int |
||||
tinydrm_display_pipe_init(struct tinydrm_device *tdev, |
||||
const struct drm_simple_display_pipe_funcs *funcs, |
||||
int connector_type, |
||||
const uint32_t *formats, |
||||
unsigned int format_count, |
||||
const struct drm_display_mode *mode, |
||||
unsigned int rotation) |
||||
{ |
||||
struct drm_device *drm = tdev->drm; |
||||
struct drm_display_mode *mode_copy; |
||||
struct drm_connector *connector; |
||||
int ret; |
||||
|
||||
mode_copy = devm_kmalloc(drm->dev, sizeof(*mode_copy), GFP_KERNEL); |
||||
if (!mode_copy) |
||||
return -ENOMEM; |
||||
|
||||
*mode_copy = *mode; |
||||
ret = tinydrm_rotate_mode(mode_copy, rotation); |
||||
if (ret) { |
||||
DRM_ERROR("Illegal rotation value %u\n", rotation); |
||||
return -EINVAL; |
||||
} |
||||
|
||||
drm->mode_config.min_width = mode_copy->hdisplay; |
||||
drm->mode_config.max_width = mode_copy->hdisplay; |
||||
drm->mode_config.min_height = mode_copy->vdisplay; |
||||
drm->mode_config.max_height = mode_copy->vdisplay; |
||||
|
||||
connector = tinydrm_connector_create(drm, mode_copy, connector_type); |
||||
if (IS_ERR(connector)) |
||||
return PTR_ERR(connector); |
||||
|
||||
ret = drm_simple_display_pipe_init(drm, &tdev->pipe, funcs, formats, |
||||
format_count, connector); |
||||
if (ret) |
||||
return ret; |
||||
|
||||
return 0; |
||||
} |
||||
EXPORT_SYMBOL(tinydrm_display_pipe_init); |
@ -0,0 +1,115 @@ |
||||
/*
|
||||
* Copyright (C) 2016 Noralf Trønnes |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
*/ |
||||
|
||||
#ifndef __LINUX_TINYDRM_H |
||||
#define __LINUX_TINYDRM_H |
||||
|
||||
#include <drm/drm_gem_cma_helper.h> |
||||
#include <drm/drm_fb_cma_helper.h> |
||||
#include <drm/drm_simple_kms_helper.h> |
||||
|
||||
/**
|
||||
* struct tinydrm_device - tinydrm device |
||||
* @drm: DRM device |
||||
* @pipe: Display pipe structure |
||||
* @dirty_lock: Serializes framebuffer flushing |
||||
* @fbdev_cma: CMA fbdev structure |
||||
* @suspend_state: Atomic state when suspended |
||||
* @fb_funcs: Framebuffer functions used when creating framebuffers |
||||
*/ |
||||
struct tinydrm_device { |
||||
struct drm_device *drm; |
||||
struct drm_simple_display_pipe pipe; |
||||
struct mutex dirty_lock; |
||||
struct drm_fbdev_cma *fbdev_cma; |
||||
struct drm_atomic_state *suspend_state; |
||||
const struct drm_framebuffer_funcs *fb_funcs; |
||||
}; |
||||
|
||||
static inline struct tinydrm_device * |
||||
pipe_to_tinydrm(struct drm_simple_display_pipe *pipe) |
||||
{ |
||||
return container_of(pipe, struct tinydrm_device, pipe); |
||||
} |
||||
|
||||
/**
|
||||
* TINYDRM_GEM_DRIVER_OPS - default tinydrm gem operations |
||||
* |
||||
* This macro provides a shortcut for setting the tinydrm GEM operations in |
||||
* the &drm_driver structure. |
||||
*/ |
||||
#define TINYDRM_GEM_DRIVER_OPS \ |
||||
.gem_free_object = tinydrm_gem_cma_free_object, \
|
||||
.gem_vm_ops = &drm_gem_cma_vm_ops, \
|
||||
.prime_handle_to_fd = drm_gem_prime_handle_to_fd, \
|
||||
.prime_fd_to_handle = drm_gem_prime_fd_to_handle, \
|
||||
.gem_prime_import = drm_gem_prime_import, \
|
||||
.gem_prime_export = drm_gem_prime_export, \
|
||||
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, \
|
||||
.gem_prime_import_sg_table = tinydrm_gem_cma_prime_import_sg_table, \
|
||||
.gem_prime_vmap = drm_gem_cma_prime_vmap, \
|
||||
.gem_prime_vunmap = drm_gem_cma_prime_vunmap, \
|
||||
.gem_prime_mmap = drm_gem_cma_prime_mmap, \
|
||||
.dumb_create = drm_gem_cma_dumb_create, \
|
||||
.dumb_map_offset = drm_gem_cma_dumb_map_offset, \
|
||||
.dumb_destroy = drm_gem_dumb_destroy, \
|
||||
.fops = &tinydrm_fops |
||||
|
||||
/**
|
||||
* TINYDRM_MODE - tinydrm display mode |
||||
* @hd: Horizontal resolution, width |
||||
* @vd: Vertical resolution, height |
||||
* @hd_mm: Display width in millimeters |
||||
* @vd_mm: Display height in millimeters |
||||
* |
||||
* This macro creates a &drm_display_mode for use with tinydrm. |
||||
*/ |
||||
#define TINYDRM_MODE(hd, vd, hd_mm, vd_mm) \ |
||||
.hdisplay = (hd), \
|
||||
.hsync_start = (hd), \
|
||||
.hsync_end = (hd), \
|
||||
.htotal = (hd), \
|
||||
.vdisplay = (vd), \
|
||||
.vsync_start = (vd), \
|
||||
.vsync_end = (vd), \
|
||||
.vtotal = (vd), \
|
||||
.width_mm = (hd_mm), \
|
||||
.height_mm = (vd_mm), \
|
||||
.type = DRM_MODE_TYPE_DRIVER, \
|
||||
.clock = 1 /* pass validation */ |
||||
|
||||
extern const struct file_operations tinydrm_fops; |
||||
void tinydrm_lastclose(struct drm_device *drm); |
||||
void tinydrm_gem_cma_free_object(struct drm_gem_object *gem_obj); |
||||
struct drm_gem_object * |
||||
tinydrm_gem_cma_prime_import_sg_table(struct drm_device *drm, |
||||
struct dma_buf_attachment *attach, |
||||
struct sg_table *sgt); |
||||
int devm_tinydrm_init(struct device *parent, struct tinydrm_device *tdev, |
||||
const struct drm_framebuffer_funcs *fb_funcs, |
||||
struct drm_driver *driver); |
||||
int devm_tinydrm_register(struct tinydrm_device *tdev); |
||||
void tinydrm_shutdown(struct tinydrm_device *tdev); |
||||
int tinydrm_suspend(struct tinydrm_device *tdev); |
||||
int tinydrm_resume(struct tinydrm_device *tdev); |
||||
|
||||
void tinydrm_display_pipe_update(struct drm_simple_display_pipe *pipe, |
||||
struct drm_plane_state *old_state); |
||||
int tinydrm_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe, |
||||
struct drm_plane_state *plane_state); |
||||
int |
||||
tinydrm_display_pipe_init(struct tinydrm_device *tdev, |
||||
const struct drm_simple_display_pipe_funcs *funcs, |
||||
int connector_type, |
||||
const uint32_t *formats, |
||||
unsigned int format_count, |
||||
const struct drm_display_mode *mode, |
||||
unsigned int rotation); |
||||
|
||||
#endif /* __LINUX_TINYDRM_H */ |
Loading…
Reference in new issue