drm/tinydrm: Remove tinydrm_device
No more users left so it can go alongside its helpers. Update the tinydrm docs description and remove todo entry. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190225144232.20761-7-noralf@tronnes.org
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Noralf Trønnes
parent
3eba392281
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2afd9fcba6
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@ -1,27 +1,12 @@
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==========================
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drm/tinydrm Driver library
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==========================
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============================
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drm/tinydrm Tiny DRM drivers
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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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tinydrm is a collection of DRM drivers that are so small they can fit in a
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single source file.
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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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Additional helpers
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==================
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Helpers
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=======
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.. kernel-doc:: include/drm/tinydrm/tinydrm-helpers.h
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:internal:
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@ -29,6 +14,9 @@ Additional helpers
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.. kernel-doc:: drivers/gpu/drm/tinydrm/core/tinydrm-helpers.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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MIPI DBI Compatible Controllers
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===============================
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@ -469,10 +469,6 @@ those drivers as simple as possible, so lots of room for refactoring:
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one of the ideas for having a shared dsi/dbi helper, abstracting away the
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transport details more.
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- Quick aside: The unregister devm stuff is kinda getting the lifetimes of
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a drm_device wrong. Doesn't matter, since everyone else gets it wrong
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too :-)
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Contact: Noralf Trønnes, Daniel Vetter
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AMD DC Display Driver
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@ -1,3 +1,3 @@
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tinydrm-y := tinydrm-core.o tinydrm-pipe.o tinydrm-helpers.o
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tinydrm-y := tinydrm-pipe.o tinydrm-helpers.o
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obj-$(CONFIG_DRM_TINYDRM) += tinydrm.o
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@ -1,169 +0,0 @@
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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_drv.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_print.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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#include <linux/module.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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static const struct drm_mode_config_funcs tinydrm_mode_config_funcs = {
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.fb_create = drm_gem_fb_create_with_dirty,
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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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struct drm_driver *driver)
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{
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struct drm_device *drm;
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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_put() 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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drm->mode_config.allow_fb_modifiers = true;
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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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tdev->drm->dev_private = NULL;
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drm_dev_put(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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* @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_put().
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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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struct drm_driver *driver)
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{
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int ret;
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ret = tinydrm_init(parent, tdev, 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 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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ret = drm_fbdev_generic_setup(drm, 0);
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if (ret)
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DRM_ERROR("Failed to initialize fbdev: %d\n", ret);
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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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drm_atomic_helper_shutdown(tdev->drm);
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drm_dev_unregister(tdev->drm);
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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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MODULE_LICENSE("GPL");
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@ -365,3 +365,5 @@ int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz,
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EXPORT_SYMBOL(tinydrm_spi_transfer);
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#endif /* CONFIG_SPI */
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MODULE_LICENSE("GPL");
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@ -1,42 +0,0 @@
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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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#ifndef __LINUX_TINYDRM_H
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#define __LINUX_TINYDRM_H
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#include <drm/drm_simple_kms_helper.h>
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struct drm_driver;
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/**
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* struct tinydrm_device - tinydrm device
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*/
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struct tinydrm_device {
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/**
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* @drm: DRM device
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*/
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struct drm_device *drm;
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/**
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* @pipe: Display pipe structure
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*/
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struct drm_simple_display_pipe pipe;
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};
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static inline struct tinydrm_device *
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pipe_to_tinydrm(struct drm_simple_display_pipe *pipe)
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{
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return container_of(pipe, struct tinydrm_device, pipe);
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}
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int devm_tinydrm_init(struct device *parent, struct tinydrm_device *tdev,
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struct drm_driver *driver);
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int devm_tinydrm_register(struct tinydrm_device *tdev);
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#endif /* __LINUX_TINYDRM_H */
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