drm: Add DRM support for tiny LCD displays
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>
This commit is contained in:
Noralf Trønnes
parent
9ca70356a9
commit
fa201ac2c6
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@ -11,6 +11,7 @@ Linux GPU Driver Developer's Guide
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drm-kms-helpers
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drm-uapi
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i915
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tinydrm
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vga-switcheroo
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vgaarbiter
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@ -0,0 +1,21 @@
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==========================
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drm/tinydrm Driver library
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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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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c
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:doc: core
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.. kernel-doc:: include/drm/tinydrm/tinydrm.h
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:internal:
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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-core.c
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:export:
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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c
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:export:
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@ -263,6 +263,8 @@ source "drivers/gpu/drm/mxsfb/Kconfig"
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source "drivers/gpu/drm/meson/Kconfig"
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source "drivers/gpu/drm/tinydrm/Kconfig"
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# Keep legacy drivers last
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menuconfig DRM_LEGACY
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@ -94,3 +94,4 @@ obj-$(CONFIG_DRM_ARCPGU)+= arc/
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obj-y += hisilicon/
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obj-$(CONFIG_DRM_ZTE) += zte/
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obj-$(CONFIG_DRM_MXSFB) += mxsfb/
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obj-$(CONFIG_DRM_TINYDRM) += tinydrm/
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@ -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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@ -0,0 +1 @@
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obj-$(CONFIG_DRM_TINYDRM) += core/
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@ -0,0 +1,3 @@
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tinydrm-y := tinydrm-core.o tinydrm-pipe.o
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obj-$(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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#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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* 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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* 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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* 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");
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@ -0,0 +1,234 @@
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/*
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* Copyright (C) 2016 Noralf Trønnes
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*
|
||||
* 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.
|
||||
*/
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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;
|
||||
drm_mode_probed_add(connector, mode);
|
||||
|
||||
if (mode->width_mm) {
|
||||
connector->display_info.width_mm = mode->width_mm;
|
||||
connector->display_info.height_mm = mode->height_mm;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static const struct drm_connector_helper_funcs tinydrm_connector_hfuncs = {
|
||||
.get_modes = tinydrm_connector_get_modes,
|
||||
.best_encoder = drm_atomic_helper_best_encoder,
|
||||
};
|
||||
|
||||
static enum drm_connector_status
|
||||
tinydrm_connector_detect(struct drm_connector *connector, bool force)
|
||||
{
|
||||
if (drm_device_is_unplugged(connector->dev))
|
||||
return connector_status_disconnected;
|
||||
|
||||
return connector->status;
|
||||
}
|
||||
|
||||
static void tinydrm_connector_destroy(struct drm_connector *connector)
|
||||
{
|
||||
struct tinydrm_connector *tconn = to_tinydrm_connector(connector);
|
||||
|
||||
drm_connector_cleanup(connector);
|
||||
kfree(tconn);
|
||||
}
|
||||
|
||||
static const struct drm_connector_funcs tinydrm_connector_funcs = {
|
||||
.dpms = drm_atomic_helper_connector_dpms,
|
||||
.reset = drm_atomic_helper_connector_reset,
|
||||
.detect = tinydrm_connector_detect,
|
||||
.fill_modes = drm_helper_probe_single_connector_modes,
|
||||
.destroy = tinydrm_connector_destroy,
|
||||
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
||||
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
||||
};
|
||||
|
||||
struct drm_connector *
|
||||
tinydrm_connector_create(struct drm_device *drm,
|
||||
const struct drm_display_mode *mode,
|
||||
int connector_type)
|
||||
{
|
||||
struct tinydrm_connector *tconn;
|
||||
struct drm_connector *connector;
|
||||
int ret;
|
||||
|
||||
tconn = kzalloc(sizeof(*tconn), GFP_KERNEL);
|
||||
if (!tconn)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
tconn->mode = mode;
|
||||
connector = &tconn->base;
|
||||
|
||||
drm_connector_helper_add(connector, &tinydrm_connector_hfuncs);
|
||||
ret = drm_connector_init(drm, connector, &tinydrm_connector_funcs,
|
||||
connector_type);
|
||||
if (ret) {
|
||||
kfree(tconn);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
|
||||
connector->status = connector_status_connected;
|
||||
|
||||
return connector;
|
||||
}
|
||||
|
||||
/**
|
||||
* tinydrm_display_pipe_update - Display pipe update helper
|
||||
* @pipe: Simple display pipe
|
||||
* @old_state: Old plane state
|
||||
*
|
||||
* This function does a full framebuffer flush if the plane framebuffer
|
||||
* has changed. It also handles vblank events. Drivers can use this as their
|
||||
* &drm_simple_display_pipe_funcs->update callback.
|
||||
*/
|
||||
void tinydrm_display_pipe_update(struct drm_simple_display_pipe *pipe,
|
||||
struct drm_plane_state *old_state)
|
||||
{
|
||||
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