--- /dev/null
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * Freescale DCU drm device driver
+ *
+ * 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.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "fsl_dcu_drm_crtc.h"
+#include "fsl_dcu_drm_drv.h"
+
+static const struct regmap_config fsl_dcu_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int fsl_dcu_drm_irq_init(struct drm_device *dev)
+{
+ struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+ unsigned int value;
+ int ret;
+
+ ret = drm_irq_install(dev, fsl_dev->irq);
+ if (ret < 0)
+ dev_err(dev->dev, "failed to install IRQ handler\n");
+
+ ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
+ if (ret)
+ dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
+ ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
+ if (ret)
+ dev_err(dev->dev, "read DCU_INT_MASK failed\n");
+ value &= DCU_INT_MASK_VBLANK;
+ ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
+ if (ret)
+ dev_err(dev->dev, "set DCU_INT_MASK failed\n");
+ ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
+ DCU_UPDATE_MODE_READREG);
+ if (ret)
+ dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
+
+ return ret;
+}
+
+static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
+{
+ struct device *dev = drm->dev;
+ struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
+ int ret;
+
+ ret = fsl_dcu_drm_modeset_init(fsl_dev);
+ if (ret < 0) {
+ dev_err(dev, "failed to initialize mode setting\n");
+ return ret;
+ }
+
+ ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+ if (ret < 0) {
+ dev_err(dev, "failed to initialize vblank\n");
+ goto done;
+ }
+ drm->vblank_disable_allowed = true;
+
+ ret = fsl_dcu_drm_irq_init(drm);
+ if (ret < 0)
+ goto done;
+ drm->irq_enabled = true;
+
+ fsl_dcu_fbdev_init(drm);
+
+ return 0;
+done:
+ if (ret) {
+ drm_mode_config_cleanup(drm);
+ drm_vblank_cleanup(drm);
+ drm_irq_uninstall(drm);
+ drm->dev_private = NULL;
+ }
+
+ return ret;
+}
+
+static int fsl_dcu_unload(struct drm_device *dev)
+{
+ drm_mode_config_cleanup(dev);
+ drm_vblank_cleanup(dev);
+ drm_irq_uninstall(dev);
+
+ dev->dev_private = NULL;
+
+ return 0;
+}
+
+static void fsl_dcu_drm_preclose(struct drm_device *dev, struct drm_file *file)
+{
+}
+
+static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
+{
+ struct drm_device *dev = arg;
+ struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+ unsigned int int_status;
+ int ret;
+
+ ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
+ if (ret)
+ dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
+ if (int_status & DCU_INT_STATUS_VBLANK)
+ drm_handle_vblank(dev, 0);
+
+ ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff);
+ if (ret)
+ dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
+ ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
+ DCU_UPDATE_MODE_READREG);
+ if (ret)
+ dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
+
+ return IRQ_HANDLED;
+}
+
+static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
+{
+ struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+ unsigned int value;
+ int ret;
+
+ ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
+ if (ret)
+ dev_err(dev->dev, "read DCU_INT_MASK failed\n");
+ value &= ~DCU_INT_MASK_VBLANK;
+ ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
+ if (ret)
+ dev_err(dev->dev, "set DCU_INT_MASK failed\n");
+ return 0;
+}
+
+static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
+ unsigned int pipe)
+{
+ struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+ unsigned int value;
+ int ret;
+
+ ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
+ if (ret)
+ dev_err(dev->dev, "read DCU_INT_MASK failed\n");
+ value |= DCU_INT_MASK_VBLANK;
+ ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
+ if (ret)
+ dev_err(dev->dev, "set DCU_INT_MASK failed\n");
+}
+
+static const struct file_operations fsl_dcu_drm_fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+ .poll = drm_poll,
+ .read = drm_read,
+ .llseek = no_llseek,
+ .mmap = drm_gem_cma_mmap,
+};
+
+static struct drm_driver fsl_dcu_drm_driver = {
+ .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
+ | DRIVER_PRIME | DRIVER_ATOMIC,
+ .load = fsl_dcu_load,
+ .unload = fsl_dcu_unload,
+ .preclose = fsl_dcu_drm_preclose,
+ .irq_handler = fsl_dcu_drm_irq,
+ .get_vblank_counter = drm_vblank_no_hw_counter,
+ .enable_vblank = fsl_dcu_drm_enable_vblank,
+ .disable_vblank = fsl_dcu_drm_disable_vblank,
+ .gem_free_object = drm_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 = 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,
+ .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .dumb_destroy = drm_gem_dumb_destroy,
+ .fops = &fsl_dcu_drm_fops,
+ .name = "fsl-dcu-drm",
+ .desc = "Freescale DCU DRM",
+ .date = "20150213",
+ .major = 1,
+ .minor = 0,
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int fsl_dcu_drm_pm_suspend(struct device *dev)
+{
+ struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
+
+ if (!fsl_dev)
+ return 0;
+
+ drm_kms_helper_poll_disable(fsl_dev->drm);
+ regcache_cache_only(fsl_dev->regmap, true);
+ regcache_mark_dirty(fsl_dev->regmap);
+ clk_disable(fsl_dev->clk);
+ clk_unprepare(fsl_dev->clk);
+
+ return 0;
+}
+
+static int fsl_dcu_drm_pm_resume(struct device *dev)
+{
+ struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
+ int ret;
+
+ if (!fsl_dev)
+ return 0;
+
+ ret = clk_enable(fsl_dev->clk);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable dcu clk\n");
+ clk_unprepare(fsl_dev->clk);
+ return ret;
+ }
+ ret = clk_prepare(fsl_dev->clk);
+ if (ret < 0) {
+ dev_err(dev, "failed to prepare dcu clk\n");
+ return ret;
+ }
+
+ drm_kms_helper_poll_enable(fsl_dev->drm);
+ regcache_cache_only(fsl_dev->regmap, false);
+ regcache_sync(fsl_dev->regmap);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
+};
+
+static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
+ .name = "ls1021a",
+ .total_layer = 16,
+ .max_layer = 4,
+};
+
+static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
+ .name = "vf610",
+ .total_layer = 64,
+ .max_layer = 6,
+};
+
+static const struct of_device_id fsl_dcu_of_match[] = {
+ {
+ .compatible = "fsl,ls1021a-dcu",
+ .data = &fsl_dcu_ls1021a_data,
+ }, {
+ .compatible = "fsl,vf610-dcu",
+ .data = &fsl_dcu_vf610_data,
+ }, {
+ },
+};
+MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
+
+static int fsl_dcu_drm_probe(struct platform_device *pdev)
+{
+ struct fsl_dcu_drm_device *fsl_dev;
+ struct drm_device *drm;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ void __iomem *base;
+ struct drm_driver *driver = &fsl_dcu_drm_driver;
+ const struct of_device_id *id;
+ int ret;
+
+ fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
+ if (!fsl_dev)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "could not get memory IO resource\n");
+ return -ENODEV;
+ }
+
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base)) {
+ ret = PTR_ERR(base);
+ return ret;
+ }
+
+ fsl_dev->irq = platform_get_irq(pdev, 0);
+ if (fsl_dev->irq < 0) {
+ dev_err(dev, "failed to get irq\n");
+ return -ENXIO;
+ }
+
+ fsl_dev->clk = devm_clk_get(dev, "dcu");
+ if (IS_ERR(fsl_dev->clk)) {
+ ret = PTR_ERR(fsl_dev->clk);
+ dev_err(dev, "failed to get dcu clock\n");
+ return ret;
+ }
+ ret = clk_prepare(fsl_dev->clk);
+ if (ret < 0) {
+ dev_err(dev, "failed to prepare dcu clk\n");
+ return ret;
+ }
+ ret = clk_enable(fsl_dev->clk);
+ if (ret < 0) {
+ dev_err(dev, "failed to enable dcu clk\n");
+ clk_unprepare(fsl_dev->clk);
+ return ret;
+ }
+
+ fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
+ &fsl_dcu_regmap_config);
+ if (IS_ERR(fsl_dev->regmap)) {
+ dev_err(dev, "regmap init failed\n");
+ return PTR_ERR(fsl_dev->regmap);
+ }
+
+ id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
+ if (!id)
+ return -ENODEV;
+ fsl_dev->soc = id->data;
+
+ drm = drm_dev_alloc(driver, dev);
+ if (!drm)
+ return -ENOMEM;
+
+ fsl_dev->dev = dev;
+ fsl_dev->drm = drm;
+ fsl_dev->np = dev->of_node;
+ drm->dev_private = fsl_dev;
+ dev_set_drvdata(dev, fsl_dev);
+ drm_dev_set_unique(drm, dev_name(dev));
+
+ ret = drm_dev_register(drm, 0);
+ if (ret < 0)
+ goto unref;
+
+ DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
+ driver->major, driver->minor, driver->patchlevel,
+ driver->date, drm->primary->index);
+
+ return 0;
+
+unref:
+ drm_dev_unref(drm);
+ return ret;
+}
+
+static int fsl_dcu_drm_remove(struct platform_device *pdev)
+{
+ struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
+
+ drm_put_dev(fsl_dev->drm);
+
+ return 0;
+}
+
+static struct platform_driver fsl_dcu_drm_platform_driver = {
+ .probe = fsl_dcu_drm_probe,
+ .remove = fsl_dcu_drm_remove,
+ .driver = {
+ .name = "fsl-dcu",
+ .pm = &fsl_dcu_drm_pm_ops,
+ .of_match_table = fsl_dcu_of_match,
+ },
+};
+
+module_platform_driver(fsl_dcu_drm_platform_driver);
+
+MODULE_DESCRIPTION("Freescale DCU DRM Driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff