@@ -4789,6 +4789,15 @@ F: drivers/gpu/drm/etnaviv/
F: include/uapi/drm/etnaviv_drm.h
F: Documentation/devicetree/bindings/display/etnaviv/
+DRM DRIVERS FOR XILINX
+M: Hyun Kwon <hyun.kwon@xilinx.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+F: drivers/gpu/drm/xlnx/
+F: Documentation/devicetree/bindings/display/xlnx/
+T: git git://anongit.freedesktop.org/drm/drm-misc
+
DRM DRIVERS FOR ZTE ZX
M: Shawn Guo <shawnguo@kernel.org>
L: dri-devel@lists.freedesktop.org
@@ -289,6 +289,8 @@ source "drivers/gpu/drm/pl111/Kconfig"
source "drivers/gpu/drm/tve200/Kconfig"
+source "drivers/gpu/drm/xlnx/Kconfig"
+
# Keep legacy drivers last
menuconfig DRM_LEGACY
@@ -103,3 +103,4 @@ obj-$(CONFIG_DRM_MXSFB) += mxsfb/
obj-$(CONFIG_DRM_TINYDRM) += tinydrm/
obj-$(CONFIG_DRM_PL111) += pl111/
obj-$(CONFIG_DRM_TVE200) += tve200/
+obj-$(CONFIG_DRM_XLNX) += xlnx/
new file mode 100644
@@ -0,0 +1,12 @@
+config DRM_XLNX
+ tristate "Xilinx DRM KMS Driver"
+ depends on DRM && OF
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_GEM_CMA_HELPER
+ help
+ Xilinx DRM KMS driver. Choose this option if you have
+ a Xilinx SoCs with hardened display pipeline or soft
+ display pipeline using Xilinx IPs in FPGA. This module
+ provides the kernel mode setting functionalities
+ for Xilinx display drivers.
new file mode 100644
@@ -0,0 +1,2 @@
+xlnx_drm-objs += xlnx_crtc.o xlnx_drv.o xlnx_fb.o xlnx_gem.o
+obj-$(CONFIG_DRM_XLNX) += xlnx_drm.o
new file mode 100644
@@ -0,0 +1,177 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM crtc driver
+ *
+ * Copyright (C) 2017 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+
+#include <linux/list.h>
+
+#include "xlnx_crtc.h"
+#include "xlnx_drv.h"
+
+/*
+ * Overview
+ * --------
+ *
+ * The Xilinx CRTC layer is to enable the custom interface to CRTC drivers.
+ * The interface is used by Xilinx DRM driver where it needs CRTC
+ * functionailty. CRTC drivers should attach the desired callbacks
+ * to struct xlnx_crtc and register the xlnx_crtc with correcsponding
+ * drm_device. It's highly recommended CRTC drivers register all callbacks
+ * even though many of them are optional.
+ * The CRTC helper simply walks through the registered CRTC device,
+ * and call the callbacks.
+ */
+
+/**
+ * struct xlnx_crtc_helper - Xilinx CRTC helper
+ * @xlnx_crtcs: list of Xilinx CRTC devices
+ * @lock: lock to protect @xlnx_crtcs
+ * @drm: back pointer to DRM core
+ */
+struct xlnx_crtc_helper {
+ struct list_head xlnx_crtcs;
+ struct mutex lock; /* lock for @xlnx_crtcs */
+ struct drm_device *drm;
+};
+
+#define XLNX_CRTC_MAX_HEIGHT_WIDTH UINT_MAX
+
+unsigned int xlnx_crtc_helper_get_align(struct xlnx_crtc_helper *helper)
+{
+ struct xlnx_crtc *crtc;
+ unsigned int align = 1, tmp;
+
+ list_for_each_entry(crtc, &helper->xlnx_crtcs, list) {
+ if (crtc->get_align) {
+ tmp = crtc->get_align(crtc);
+ align = ALIGN(align, tmp);
+ }
+ }
+
+ return align;
+}
+
+u64 xlnx_crtc_helper_get_dma_mask(struct xlnx_crtc_helper *helper)
+{
+ struct xlnx_crtc *crtc;
+ u64 mask = DMA_BIT_MASK(sizeof(dma_addr_t) * 8), tmp;
+
+ list_for_each_entry(crtc, &helper->xlnx_crtcs, list) {
+ if (crtc->get_dma_mask) {
+ tmp = crtc->get_dma_mask(crtc);
+ mask = min(mask, tmp);
+ }
+ }
+
+ return mask;
+}
+
+int xlnx_crtc_helper_get_max_width(struct xlnx_crtc_helper *helper)
+{
+ struct xlnx_crtc *crtc;
+ unsigned int width = XLNX_CRTC_MAX_HEIGHT_WIDTH, tmp;
+
+ list_for_each_entry(crtc, &helper->xlnx_crtcs, list) {
+ if (crtc->get_max_width) {
+ tmp = crtc->get_max_width(crtc);
+ width = min(width, tmp);
+ }
+ }
+
+ return width;
+}
+
+int xlnx_crtc_helper_get_max_height(struct xlnx_crtc_helper *helper)
+{
+ struct xlnx_crtc *crtc;
+ unsigned int height = XLNX_CRTC_MAX_HEIGHT_WIDTH, tmp;
+
+ list_for_each_entry(crtc, &helper->xlnx_crtcs, list) {
+ if (crtc->get_max_height) {
+ tmp = crtc->get_max_height(crtc);
+ height = min(height, tmp);
+ }
+ }
+
+ return height;
+}
+
+uint32_t xlnx_crtc_helper_get_format(struct xlnx_crtc_helper *helper)
+{
+ struct xlnx_crtc *crtc;
+ u32 format = 0, tmp;
+
+ list_for_each_entry(crtc, &helper->xlnx_crtcs, list) {
+ if (crtc->get_format) {
+ tmp = crtc->get_format(crtc);
+ if (format && format != tmp)
+ return 0;
+ format = tmp;
+ }
+ }
+
+ return format;
+}
+
+struct xlnx_crtc_helper *xlnx_crtc_helper_init(struct drm_device *drm)
+{
+ struct xlnx_crtc_helper *helper;
+
+ helper = devm_kzalloc(drm->dev, sizeof(*helper), GFP_KERNEL);
+ if (!helper)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&helper->xlnx_crtcs);
+ mutex_init(&helper->lock);
+ helper->drm = drm;
+
+ return helper;
+}
+
+void xlnx_crtc_helper_fini(struct drm_device *drm,
+ struct xlnx_crtc_helper *helper)
+{
+ if (WARN_ON(helper->drm != drm))
+ return;
+
+ if (WARN_ON(!list_empty(&helper->xlnx_crtcs)))
+ return;
+
+ mutex_destroy(&helper->lock);
+ devm_kfree(drm->dev, helper);
+}
+
+void xlnx_crtc_register(struct drm_device *drm, struct xlnx_crtc *crtc)
+{
+ struct xlnx_crtc_helper *helper = xlnx_get_crtc_helper(drm);
+
+ mutex_lock(&helper->lock);
+ list_add_tail(&crtc->list, &helper->xlnx_crtcs);
+ mutex_unlock(&helper->lock);
+}
+EXPORT_SYMBOL_GPL(xlnx_crtc_register);
+
+void xlnx_crtc_unregister(struct drm_device *drm, struct xlnx_crtc *crtc)
+{
+ struct xlnx_crtc_helper *helper = xlnx_get_crtc_helper(drm);
+
+ mutex_lock(&helper->lock);
+ list_del(&crtc->list);
+ mutex_unlock(&helper->lock);
+}
+EXPORT_SYMBOL_GPL(xlnx_crtc_unregister);
new file mode 100644
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM crtc header
+ *
+ * Copyright (C) 2017 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _XLNX_CRTC_H_
+#define _XLNX_CRTC_H_
+
+/**
+ * struct xlnx_crtc - Xilinx CRTC device
+ * @crtc: DRM CRTC device
+ * @list: list node for Xilinx CRTC device list
+ * @get_align: Get the alignment requirement of CRTC device
+ * @get_dma_mask: Get the dma mask of CRTC device
+ * @get_max_width: Get the maximum supported width
+ * @get_max_height: Get the maximum supported height
+ * @get_format: Get the current format of CRTC device
+ */
+struct xlnx_crtc {
+ struct drm_crtc crtc;
+ struct list_head list;
+ unsigned int (*get_align)(struct xlnx_crtc *crtc);
+ u64 (*get_dma_mask)(struct xlnx_crtc *crtc);
+ int (*get_max_width)(struct xlnx_crtc *crtc);
+ int (*get_max_height)(struct xlnx_crtc *crtc);
+ uint32_t (*get_format)(struct xlnx_crtc *crtc);
+};
+
+/*
+ * Helper functions: used within Xlnx DRM
+ */
+
+struct xlnx_crtc_helper;
+
+unsigned int xlnx_crtc_helper_get_align(struct xlnx_crtc_helper *helper);
+u64 xlnx_crtc_helper_get_dma_mask(struct xlnx_crtc_helper *helper);
+int xlnx_crtc_helper_get_max_width(struct xlnx_crtc_helper *helper);
+int xlnx_crtc_helper_get_max_height(struct xlnx_crtc_helper *helper);
+uint32_t xlnx_crtc_helper_get_format(struct xlnx_crtc_helper *helper);
+
+struct xlnx_crtc_helper *xlnx_crtc_helper_init(struct drm_device *drm);
+void xlnx_crtc_helper_fini(struct drm_device *drm,
+ struct xlnx_crtc_helper *helper);
+
+/*
+ * CRTC registration: used by other sub-driver modules
+ */
+
+static inline struct xlnx_crtc *to_xlnx_crtc(struct drm_crtc *crtc)
+{
+ return container_of(crtc, struct xlnx_crtc, crtc);
+}
+
+void xlnx_crtc_register(struct drm_device *drm, struct xlnx_crtc *crtc);
+void xlnx_crtc_unregister(struct drm_device *drm, struct xlnx_crtc *crtc);
+
+#endif /* _XLNX_CRTC_H_ */
new file mode 100644
@@ -0,0 +1,546 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM KMS Driver
+ *
+ * Copyright (C) 2013 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_of.h>
+
+#include <linux/component.h>
+#include <linux/device.h>
+#include <linux/dma-buf.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/reservation.h>
+
+#include "xlnx_crtc.h"
+#include "xlnx_fb.h"
+#include "xlnx_gem.h"
+
+#define DRIVER_NAME "xlnx"
+#define DRIVER_DESC "Xilinx DRM KMS Driver"
+#define DRIVER_DATE "20130509"
+#define DRIVER_MAJOR 1
+#define DRIVER_MINOR 0
+
+static uint xlnx_fbdev_vres = 2;
+module_param_named(fbdev_vres, xlnx_fbdev_vres, uint, 0444);
+MODULE_PARM_DESC(fbdev_vres,
+ "fbdev virtual resolution multiplier for fb (default: 2)");
+
+/**
+ * struct xlnx_drm - Xilinx DRM private data
+ * @drm: DRM core
+ * @crtc: Xilinx DRM CRTC helper
+ * @fb: DRM fb helper
+ * @master: logical master device for pipeline
+ * @suspend_state: atomic state for suspend / resume
+ */
+struct xlnx_drm {
+ struct drm_device *drm;
+ struct xlnx_crtc_helper *crtc;
+ struct drm_fb_helper *fb;
+ struct platform_device *master;
+ struct drm_atomic_state *suspend_state;
+};
+
+/**
+ * xlnx_get_crtc_helper - Return the crtc helper instance
+ * @drm: DRM device
+ *
+ * Return: the crtc helper instance
+ */
+struct xlnx_crtc_helper *xlnx_get_crtc_helper(struct drm_device *drm)
+{
+ struct xlnx_drm *xlnx_drm = drm->dev_private;
+
+ return xlnx_drm->crtc;
+}
+
+/**
+ * xlnx_get_align - Return the align requirement through CRTC helper
+ * @drm: DRM device
+ *
+ * Return: the alignment requirement
+ */
+unsigned int xlnx_get_align(struct drm_device *drm)
+{
+ struct xlnx_drm *xlnx_drm = drm->dev_private;
+
+ return xlnx_crtc_helper_get_align(xlnx_drm->crtc);
+}
+
+/**
+ * xlnx_get_format - Return the current format of CRTC
+ * @drm: DRM device
+ *
+ * Return: the current CRTC format
+ */
+uint32_t xlnx_get_format(struct drm_device *drm)
+{
+ struct xlnx_drm *xlnx_drm = drm->dev_private;
+
+ return xlnx_crtc_helper_get_format(xlnx_drm->crtc);
+}
+
+static void xlnx_output_poll_changed(struct drm_device *drm)
+{
+ struct xlnx_drm *xlnx_drm = drm->dev_private;
+
+ if (xlnx_drm->fb)
+ drm_fb_helper_hotplug_event(xlnx_drm->fb);
+}
+
+static const struct drm_mode_config_funcs xlnx_mode_config_funcs = {
+ .fb_create = xlnx_fb_create,
+ .output_poll_changed = xlnx_output_poll_changed,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+static void xlnx_mode_config_init(struct drm_device *drm)
+{
+ struct xlnx_drm *xlnx_drm = drm->dev_private;
+ struct xlnx_crtc_helper *crtc = xlnx_drm->crtc;
+
+ drm->mode_config.min_width = 0;
+ drm->mode_config.min_height = 0;
+ drm->mode_config.max_width = xlnx_crtc_helper_get_max_width(crtc);
+ drm->mode_config.max_height = xlnx_crtc_helper_get_max_height(crtc);
+}
+
+static void xlnx_lastclose(struct drm_device *drm)
+{
+ struct xlnx_drm *xlnx_drm = drm->dev_private;
+
+ if (xlnx_drm->fb)
+ drm_fb_helper_restore_fbdev_mode_unlocked(xlnx_drm->fb);
+}
+
+static const struct file_operations xlnx_fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+ .mmap = drm_gem_cma_mmap,
+ .poll = drm_poll,
+ .read = drm_read,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+ .llseek = noop_llseek,
+};
+
+static struct drm_driver xlnx_drm_driver = {
+ .driver_features = DRIVER_MODESET | DRIVER_GEM |
+ DRIVER_ATOMIC | DRIVER_PRIME,
+ .lastclose = xlnx_lastclose,
+
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
+ .gem_prime_import_sg_table = drm_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,
+ .gem_free_object = drm_gem_cma_free_object,
+ .gem_vm_ops = &drm_gem_cma_vm_ops,
+ .dumb_create = xlnx_gem_cma_dumb_create,
+ .dumb_destroy = drm_gem_dumb_destroy,
+
+ .fops = &xlnx_fops,
+
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESC,
+ .date = DRIVER_DATE,
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+};
+
+static int xlnx_bind(struct device *dev)
+{
+ struct xlnx_drm *xlnx_drm;
+ struct drm_device *drm;
+ const struct drm_format_info *info;
+ struct platform_device *master = to_platform_device(dev);
+ struct platform_device *pdev = to_platform_device(dev->parent);
+ int ret;
+ u32 format;
+
+ drm = drm_dev_alloc(&xlnx_drm_driver, &pdev->dev);
+ if (IS_ERR(drm))
+ return PTR_ERR(drm);
+
+ xlnx_drm = devm_kzalloc(drm->dev, sizeof(*xlnx_drm), GFP_KERNEL);
+ if (!xlnx_drm) {
+ ret = -ENOMEM;
+ goto err_drm;
+ }
+
+ drm_mode_config_init(drm);
+ drm->mode_config.funcs = &xlnx_mode_config_funcs;
+
+ ret = drm_vblank_init(drm, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize vblank\n");
+ goto err_xlnx_drm;
+ }
+
+ drm->irq_enabled = 1;
+ drm->dev_private = xlnx_drm;
+ xlnx_drm->drm = drm;
+ xlnx_drm->master = master;
+ drm_kms_helper_poll_init(drm);
+ platform_set_drvdata(master, xlnx_drm);
+
+ xlnx_drm->crtc = xlnx_crtc_helper_init(drm);
+ if (IS_ERR(xlnx_drm->crtc)) {
+ ret = PTR_ERR(xlnx_drm->crtc);
+ goto err_xlnx_drm;
+ }
+
+ ret = component_bind_all(&master->dev, drm);
+ if (ret)
+ goto err_crtc;
+
+ xlnx_mode_config_init(drm);
+ drm_mode_config_reset(drm);
+ dma_set_mask(drm->dev, xlnx_crtc_helper_get_dma_mask(xlnx_drm->crtc));
+
+ format = xlnx_crtc_helper_get_format(xlnx_drm->crtc);
+ info = drm_format_info(format);
+ if (info && info->depth && info->cpp[0]) {
+ unsigned int align;
+
+ align = xlnx_crtc_helper_get_align(xlnx_drm->crtc);
+ xlnx_drm->fb = xlnx_fb_init(drm, info->cpp[0] * 8, 1, align,
+ xlnx_fbdev_vres);
+ if (IS_ERR(xlnx_drm->fb)) {
+ dev_err(&pdev->dev,
+ "failed to initialize drm fb\n");
+ xlnx_drm->fb = NULL;
+ }
+ } else {
+ /* fbdev emulation is optional */
+ dev_info(&pdev->dev, "fbdev is not initialized\n");
+ }
+
+ ret = drm_dev_register(drm, 0);
+ if (ret < 0)
+ goto err_fb;
+
+ return 0;
+
+err_fb:
+ if (xlnx_drm->fb)
+ xlnx_fb_fini(xlnx_drm->fb);
+ component_unbind_all(drm->dev, drm);
+err_crtc:
+ xlnx_crtc_helper_fini(drm, xlnx_drm->crtc);
+err_xlnx_drm:
+ drm_mode_config_cleanup(drm);
+err_drm:
+ drm_dev_unref(drm);
+ return ret;
+}
+
+static void xlnx_unbind(struct device *dev)
+{
+ struct xlnx_drm *xlnx_drm = dev_get_drvdata(dev);
+ struct drm_device *drm = xlnx_drm->drm;
+
+ drm_dev_unregister(drm);
+ if (xlnx_drm->fb)
+ xlnx_fb_fini(xlnx_drm->fb);
+ component_unbind_all(&xlnx_drm->master->dev, drm);
+ xlnx_crtc_helper_fini(drm, xlnx_drm->crtc);
+ drm_kms_helper_poll_fini(drm);
+ drm_mode_config_cleanup(drm);
+ drm_dev_unref(drm);
+}
+
+static const struct component_master_ops xlnx_master_ops = {
+ .bind = xlnx_bind,
+ .unbind = xlnx_unbind,
+};
+
+static int xlnx_of_component_probe(struct device *master_dev,
+ int (*compare_of)(struct device *, void *),
+ const struct component_master_ops *m_ops)
+{
+ struct device *dev = master_dev->parent;
+ struct device_node *ep, *port, *remote, *parent;
+ struct component_match *match = NULL;
+ int i;
+
+ if (!dev->of_node)
+ return -EINVAL;
+
+ for (i = 0; ; i++) {
+ port = of_parse_phandle(dev->of_node, "ports", i);
+ if (!port)
+ break;
+
+ parent = port->parent;
+ if (!of_node_cmp(parent->name, "ports"))
+ parent = parent->parent;
+ parent = of_node_get(parent);
+
+ if (!of_device_is_available(parent)) {
+ of_node_put(parent);
+ of_node_put(port);
+ continue;
+ }
+
+ component_match_add(master_dev, &match, compare_of, parent);
+ of_node_put(parent);
+ of_node_put(port);
+ }
+
+ /*
+ * There is no port, so the device is standalone in the pipeline. Add
+ * the device to the component so it binds with the pipeline device.
+ */
+ if (i == 0) {
+ component_match_add(master_dev, &match, compare_of,
+ dev->of_node);
+ goto out;
+ }
+
+ if (!match) {
+ dev_err(dev, "no available port\n");
+ return -ENODEV;
+ }
+
+ for (i = 0; ; i++) {
+ port = of_parse_phandle(dev->of_node, "ports", i);
+ if (!port)
+ break;
+
+ parent = port->parent;
+ if (!of_node_cmp(parent->name, "ports"))
+ parent = parent->parent;
+ parent = of_node_get(parent);
+
+ if (!of_device_is_available(parent)) {
+ of_node_put(parent);
+ of_node_put(port);
+ continue;
+ }
+
+ for_each_child_of_node(port, ep) {
+ remote = of_graph_get_remote_port_parent(ep);
+ if (!remote || !of_device_is_available(remote)) {
+ of_node_put(remote);
+ continue;
+ } else if (!of_device_is_available(remote->parent)) {
+ dev_warn(dev, "parent dev of %s unavailable\n",
+ remote->full_name);
+ of_node_put(remote);
+ continue;
+ }
+ component_match_add(master_dev, &match, compare_of,
+ remote);
+ of_node_put(remote);
+ }
+ of_node_put(parent);
+ of_node_put(port);
+ }
+
+out:
+ return component_master_add_with_match(master_dev, m_ops, match);
+}
+
+static int xlnx_compare_of(struct device *dev, void *data)
+{
+ return dev->of_node == data;
+}
+
+static int xlnx_platform_probe(struct platform_device *pdev)
+{
+ return xlnx_of_component_probe(&pdev->dev, xlnx_compare_of,
+ &xlnx_master_ops);
+}
+
+static int xlnx_platform_remove(struct platform_device *pdev)
+{
+ component_master_del(&pdev->dev, &xlnx_master_ops);
+ return 0;
+}
+
+static void xlnx_platform_shutdown(struct platform_device *pdev)
+{
+ struct xlnx_drm *xlnx_drm = platform_get_drvdata(pdev);
+
+ drm_put_dev(xlnx_drm->drm);
+}
+
+static int __maybe_unused xlnx_pm_suspend(struct device *dev)
+{
+ struct xlnx_drm *xlnx_drm = dev_get_drvdata(dev);
+ struct drm_device *drm = xlnx_drm->drm;
+
+ drm_kms_helper_poll_disable(drm);
+
+ xlnx_drm->suspend_state = drm_atomic_helper_suspend(drm);
+ if (IS_ERR(xlnx_drm->suspend_state)) {
+ drm_kms_helper_poll_enable(drm);
+ return PTR_ERR(xlnx_drm->suspend_state);
+ }
+
+ return 0;
+}
+
+static int __maybe_unused xlnx_pm_resume(struct device *dev)
+{
+ struct xlnx_drm *xlnx_drm = dev_get_drvdata(dev);
+ struct drm_device *drm = xlnx_drm->drm;
+
+ drm_atomic_helper_resume(drm, xlnx_drm->suspend_state);
+ drm_kms_helper_poll_enable(drm);
+
+ return 0;
+}
+
+static const struct dev_pm_ops xlnx_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(xlnx_pm_suspend, xlnx_pm_resume)
+};
+
+static struct platform_driver xlnx_driver = {
+ .probe = xlnx_platform_probe,
+ .remove = xlnx_platform_remove,
+ .shutdown = xlnx_platform_shutdown,
+ .driver = {
+ .name = "xlnx-drm",
+ .pm = &xlnx_pm_ops,
+ },
+};
+
+static bool xlnx_platform_is_master(struct platform_device *pdev)
+{
+ struct device_node *parent = pdev->dev.of_node;
+ struct device_node *port, *node;
+
+ /* "ports" describes the entire pipeline topology*/
+ port = of_parse_phandle(parent, "ports", 0);
+ of_node_put(port);
+ if (port)
+ return true;
+
+ /* If there's any port, assume it's subcomponent */
+ node = of_get_child_by_name(parent, "ports");
+ if (node)
+ parent = node;
+
+ for_each_child_of_node(parent, port) {
+ if (!of_node_cmp(port->name, "port"))
+ return false;
+ }
+
+ return true;
+}
+
+/* bitmap for master id */
+static u32 xlnx_master_ids = GENMASK(31, 0);
+
+/**
+ * xilinx_drm_pipeline_init - Initialize the drm pipeline for the device
+ * @pdev: The platform device to initialize the drm pipeline device
+ *
+ * This function initializes the drm pipeline device, struct drm_device,
+ * on @pdev by creating a logical master platform device. The logical platform
+ * device acts as a master device to bind slave devices and represents
+ * the entire pipeline.
+ * There are certain conditions for @pdev to create the logical master device.
+ * The dt node of given @pdev should describe the pipeline topology with
+ * phandle to external crtc port(s). Without such phandle, the device is
+ * considered as a slave with its own ports in the device node. Those ports
+ * can be referenced by phandle of master or other ports. If both phandle
+ * and ports are not in the device node, it's a pipeline only with @pdev alone,
+ * so the logical master will be created, and @pdev will bind with the master
+ * device.
+ *
+ * Return: the logical master platform device if @pdev is master, and
+ * the drm device is initialized on it. NULL if @pdev is classified as slave.
+ */
+struct platform_device *xlnx_drm_pipeline_init(struct platform_device *pdev)
+{
+ struct platform_device *master;
+ int id, ret;
+
+ if (!xlnx_platform_is_master(pdev))
+ return NULL;
+
+ id = ffs(xlnx_master_ids);
+ if (!id)
+ return ERR_PTR(-ENOSPC);
+
+ master = platform_device_alloc("xlnx-drm", id);
+ if (!master)
+ return ERR_PTR(-ENOMEM);
+
+ master->dev.parent = &pdev->dev;
+ ret = platform_device_add(master);
+ if (ret)
+ goto err_out;
+
+ xlnx_master_ids &= ~(1 << id);
+ return master;
+
+err_out:
+ platform_device_unregister(master);
+ return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(xlnx_drm_pipeline_init);
+
+/**
+ * xilinx_drm_pipeline_exit - Release the drm pipeline for the device
+ * @pdev: The master pipeline device to release
+ *
+ * Release the logical pipeline device returned by xlnx_drm_pipeline_init().
+ */
+void xlnx_drm_pipeline_exit(struct platform_device *master)
+{
+ xlnx_master_ids |= (1 << master->id);
+ platform_device_unregister(master);
+}
+EXPORT_SYMBOL_GPL(xlnx_drm_pipeline_exit);
+
+static int __init xlnx_drm_drv_init(void)
+{
+ platform_driver_register(&xlnx_driver);
+ return 0;
+}
+
+static void __exit xlnx_drm_drv_exit(void)
+{
+ platform_driver_unregister(&xlnx_driver);
+}
+
+module_init(xlnx_drm_drv_init);
+module_exit(xlnx_drm_drv_exit);
+
+MODULE_AUTHOR("Xilinx, Inc.");
+MODULE_DESCRIPTION("Xilinx DRM KMS Driver");
+MODULE_LICENSE("GPL v2");
new file mode 100644
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM KMS Header for Xilinx
+ *
+ * Copyright (C) 2013 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyunk@xilinx.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _XLNX_DRV_H_
+#define _XLNX_DRV_H_
+
+struct drm_device;
+struct xlnx_crtc_helper;
+
+struct platform_device *xlnx_drm_pipeline_init(struct platform_device *parent);
+void xlnx_drm_pipeline_exit(struct platform_device *pipeline);
+
+uint32_t xlnx_get_format(struct drm_device *drm);
+unsigned int xlnx_get_align(struct drm_device *drm);
+struct xlnx_crtc_helper *xlnx_get_crtc_helper(struct drm_device *drm);
+struct xlnx_bridge_helper *xlnx_get_bridge_helper(struct drm_device *drm);
+
+#endif /* _XLNX_DRV_H_ */
new file mode 100644
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM KMS Framebuffer helper
+ *
+ * Copyright (C) 2015 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ *
+ * Based on drm_fb_cma_helper.c
+ *
+ * Copyright (C) 2012 Analog Device Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+
+#include "xlnx_drv.h"
+#include "xlnx_fb.h"
+
+#define XLNX_MAX_PLANES 4
+
+struct xlnx_fbdev {
+ struct drm_fb_helper fb_helper;
+ struct drm_framebuffer *fb;
+ unsigned int align;
+ unsigned int vres_mult;
+};
+
+static inline struct xlnx_fbdev *to_fbdev(struct drm_fb_helper *fb_helper)
+{
+ return container_of(fb_helper, struct xlnx_fbdev, fb_helper);
+}
+
+static struct drm_framebuffer_funcs xlnx_fb_funcs = {
+ .destroy = drm_gem_fb_destroy,
+ .create_handle = drm_gem_fb_create_handle,
+};
+
+static int
+xlnx_fb_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ unsigned int i;
+ int ret = 0;
+
+ switch (cmd) {
+ case FBIO_WAITFORVSYNC:
+ for (i = 0; i < fb_helper->crtc_count; i++) {
+ struct drm_mode_set *mode_set;
+ struct drm_crtc *crtc;
+
+ mode_set = &fb_helper->crtc_info[i].mode_set;
+ crtc = mode_set->crtc;
+ ret = drm_crtc_vblank_get(crtc);
+ if (!ret) {
+ drm_crtc_wait_one_vblank(crtc);
+ drm_crtc_vblank_put(crtc);
+ }
+ }
+ return ret;
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+static struct fb_ops xlnx_fbdev_ops = {
+ .owner = THIS_MODULE,
+ .fb_fillrect = sys_fillrect,
+ .fb_copyarea = sys_copyarea,
+ .fb_imageblit = sys_imageblit,
+ .fb_check_var = drm_fb_helper_check_var,
+ .fb_set_par = drm_fb_helper_set_par,
+ .fb_blank = drm_fb_helper_blank,
+ .fb_pan_display = drm_fb_helper_pan_display,
+ .fb_setcmap = drm_fb_helper_setcmap,
+ .fb_ioctl = xlnx_fb_ioctl,
+};
+
+/**
+ * xlnx_fbdev_create - Create the fbdev with a framebuffer
+ * @fb_helper: fb helper structure
+ * @size: framebuffer size info
+ *
+ * This function is based on drm_fbdev_cma_create().
+ *
+ * Return: 0 if successful, or the error code.
+ */
+static int xlnx_fbdev_create(struct drm_fb_helper *fb_helper,
+ struct drm_fb_helper_surface_size *size)
+{
+ struct xlnx_fbdev *fbdev = to_fbdev(fb_helper);
+ struct drm_device *drm = fb_helper->dev;
+ struct drm_gem_cma_object *obj;
+ struct drm_framebuffer *fb;
+ unsigned int bytes_per_pixel;
+ unsigned long offset;
+ struct fb_info *fbi;
+ size_t bytes;
+ int ret;
+
+ dev_dbg(drm->dev, "surface width(%d), height(%d) and bpp(%d)\n",
+ size->surface_width, size->surface_height, size->surface_bpp);
+
+ size->surface_height *= fbdev->vres_mult;
+ bytes_per_pixel = DIV_ROUND_UP(size->surface_bpp, 8);
+ bytes = ALIGN(size->surface_width * bytes_per_pixel, fbdev->align);
+ bytes *= size->surface_height;
+
+ obj = drm_gem_cma_create(drm, bytes);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ fbi = framebuffer_alloc(0, drm->dev);
+ if (!fbi) {
+ dev_err(drm->dev, "Failed to allocate framebuffer info.\n");
+ ret = -ENOMEM;
+ goto err_drm_gem_cma_free_object;
+ }
+
+ fbdev->fb = drm_gem_fbdev_fb_create(drm, size, fbdev->align, &obj->base,
+ &xlnx_fb_funcs);
+ if (IS_ERR(fbdev->fb)) {
+ dev_err(drm->dev, "Failed to allocate DRM framebuffer.\n");
+ ret = PTR_ERR(fbdev->fb);
+ goto err_framebuffer_release;
+ }
+
+ fb = fbdev->fb;
+ fb_helper->fb = fb;
+ fb_helper->fbdev = fbi;
+ fbi->par = fb_helper;
+ fbi->flags = FBINFO_FLAG_DEFAULT;
+ fbi->fbops = &xlnx_fbdev_ops;
+
+ ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
+ if (ret) {
+ dev_err(drm->dev, "Failed to allocate color map.\n");
+ goto err_fb_destroy;
+ }
+
+ drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);
+ drm_fb_helper_fill_var(fbi, fb_helper, fb->width, fb->height);
+ fbi->var.yres = fb->height / fbdev->vres_mult;
+
+ offset = fbi->var.xoffset * bytes_per_pixel;
+ offset += fbi->var.yoffset * fb->pitches[0];
+
+ drm->mode_config.fb_base = (resource_size_t)obj->paddr;
+ fbi->screen_base = (char __iomem *)(obj->vaddr + offset);
+ fbi->fix.smem_start = (unsigned long)(obj->paddr + offset);
+ fbi->screen_size = bytes;
+ fbi->fix.smem_len = bytes;
+
+ return 0;
+
+err_fb_destroy:
+ drm_framebuffer_unregister_private(fb);
+ drm_gem_fb_destroy(fb);
+err_framebuffer_release:
+ framebuffer_release(fbi);
+err_drm_gem_cma_free_object:
+ drm_gem_cma_free_object(&obj->base);
+ return ret;
+}
+
+static struct drm_fb_helper_funcs xlnx_fb_helper_funcs = {
+ .fb_probe = xlnx_fbdev_create,
+};
+
+/**
+ * xlnx_fb_init - Allocate and initializes the Xilinx framebuffer
+ * @drm: DRM device
+ * @preferred_bpp: preferred bits per pixel for the device
+ * @max_conn_count: maximum number of connectors
+ * @align: alignment value for pitch
+ * @vres_mult: multiplier for virtual resolution
+ *
+ * This function is based on drm_fbdev_cma_init().
+ *
+ * Return: a newly allocated drm_fb_helper struct or a ERR_PTR.
+ */
+struct drm_fb_helper *
+xlnx_fb_init(struct drm_device *drm, int preferred_bpp,
+ unsigned int max_conn_count, unsigned int align,
+ unsigned int vres_mult)
+{
+ struct xlnx_fbdev *fbdev;
+ struct drm_fb_helper *fb_helper;
+ int ret;
+
+ fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
+ if (!fbdev)
+ return ERR_PTR(-ENOMEM);
+
+ fbdev->vres_mult = vres_mult;
+ fbdev->align = align;
+ fb_helper = &fbdev->fb_helper;
+ drm_fb_helper_prepare(drm, fb_helper, &xlnx_fb_helper_funcs);
+
+ ret = drm_fb_helper_init(drm, fb_helper, max_conn_count);
+ if (ret < 0) {
+ dev_err(drm->dev, "Failed to initialize drm fb helper.\n");
+ goto err_free;
+ }
+
+ ret = drm_fb_helper_single_add_all_connectors(fb_helper);
+ if (ret < 0) {
+ dev_err(drm->dev, "Failed to add connectors.\n");
+ goto err_drm_fb_helper_fini;
+ }
+
+ ret = drm_fb_helper_initial_config(fb_helper, preferred_bpp);
+ if (ret < 0) {
+ dev_err(drm->dev, "Failed to set initial hw configuration.\n");
+ goto err_drm_fb_helper_fini;
+ }
+
+ return fb_helper;
+
+err_drm_fb_helper_fini:
+ drm_fb_helper_fini(fb_helper);
+err_free:
+ kfree(fbdev);
+ return ERR_PTR(ret);
+}
+
+/**
+ * xlnx_fbdev_defio_fini - Free the defio fb
+ * @fbi: fb_info struct
+ *
+ * This function is based on drm_fbdev_cma_defio_fini().
+ */
+static void xlnx_fbdev_defio_fini(struct fb_info *fbi)
+{
+ if (!fbi->fbdefio)
+ return;
+
+ fb_deferred_io_cleanup(fbi);
+ kfree(fbi->fbdefio);
+ kfree(fbi->fbops);
+}
+
+/**
+ * xlnx_fbdev_fini - Free the Xilinx framebuffer
+ * @fb_helper: drm_fb_helper struct
+ *
+ * This function is based on drm_fbdev_cma_fini().
+ */
+void xlnx_fb_fini(struct drm_fb_helper *fb_helper)
+{
+ struct xlnx_fbdev *fbdev = to_fbdev(fb_helper);
+
+ drm_fb_helper_unregister_fbi(&fbdev->fb_helper);
+ if (fbdev->fb_helper.fbdev)
+ xlnx_fbdev_defio_fini(fbdev->fb_helper.fbdev);
+
+ if (fbdev->fb_helper.fb)
+ drm_framebuffer_remove(fbdev->fb_helper.fb);
+
+ drm_fb_helper_fini(&fbdev->fb_helper);
+ kfree(fbdev);
+}
+
+/**
+ * xlnx_fb_create - (struct drm_mode_config_funcs *)->fb_create callback
+ * @drm: DRM device
+ * @file_priv: drm file private data
+ * @mode_cmd: mode command for fb creation
+ *
+ * This functions creates a drm_framebuffer with xlnx_fb_funcs for given mode
+ * @mode_cmd. This functions is intended to be used for the fb_create callback
+ * function of drm_mode_config_funcs.
+ *
+ * Return: a drm_framebuffer object if successful, or
+ * ERR_PTR from drm_gem_fb_create_with_funcs().
+ */
+struct drm_framebuffer *
+xlnx_fb_create(struct drm_device *drm, struct drm_file *file_priv,
+ const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ return drm_gem_fb_create_with_funcs(drm, file_priv, mode_cmd,
+ &xlnx_fb_funcs);
+}
new file mode 100644
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM KMS Framebuffer helper header
+ *
+ * Copyright (C) 2015 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _XLNX_FB_H_
+#define _XLNX_FB_H_
+
+struct drm_fb_helper;
+
+struct drm_framebuffer *
+xlnx_fb_create(struct drm_device *drm, struct drm_file *file_priv,
+ const struct drm_mode_fb_cmd2 *mode_cmd);
+struct drm_fb_helper *
+xlnx_fb_init(struct drm_device *drm, int preferred_bpp,
+ unsigned int max_conn_count, unsigned int align,
+ unsigned int vres_mult);
+void xlnx_fb_fini(struct drm_fb_helper *fb_helper);
+
+#endif /* _XLNX_FB_H_ */
new file mode 100644
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM KMS GEM helper
+ *
+ * Copyright (C) 2015 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "xlnx_drv.h"
+#include "xlnx_gem.h"
+
+/*
+ * xlnx_gem_cma_dumb_create - (struct drm_driver)->dumb_create callback
+ * @file_priv: drm_file object
+ * @drm: DRM object
+ * @args: info for dumb scanout buffer creation
+ *
+ * This function is for dumb_create callback of drm_driver struct. Simply
+ * it wraps around drm_gem_cma_dumb_create() and sets the pitch value
+ * by retrieving the value from the device.
+ *
+ * Return: The return value from drm_gem_cma_dumb_create()
+ */
+int xlnx_gem_cma_dumb_create(struct drm_file *file_priv, struct drm_device *drm,
+ struct drm_mode_create_dumb *args)
+{
+ int pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
+ unsigned int align = xlnx_get_align(drm);
+
+ if (!args->pitch || !IS_ALIGNED(args->pitch, align))
+ args->pitch = ALIGN(pitch, align);
+
+ return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
+}
new file mode 100644
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx DRM KMS GEM helper header
+ *
+ * Copyright (C) 2015 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _XLNX_GEM_H_
+#define _XLNX_GEM_H_
+
+int xlnx_gem_cma_dumb_create(struct drm_file *file_priv,
+ struct drm_device *drm,
+ struct drm_mode_create_dumb *args);
+
+#endif /* _XLNX_GEM_H_ */