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path: root/drivers/gpu/drm/rcar-du/rcar_du_drv.c
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Diffstat (limited to 'drivers/gpu/drm/rcar-du/rcar_du_drv.c')
-rw-r--r--drivers/gpu/drm/rcar-du/rcar_du_drv.c325
1 files changed, 325 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
new file mode 100644
index 000000000000..ff82877de876
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -0,0 +1,325 @@
+/*
+ * rcar_du_drv.c -- R-Car Display Unit DRM driver
+ *
+ * Copyright (C) 2013 Renesas Corporation
+ *
+ * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
+ *
+ * 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/io.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "rcar_du_crtc.h"
+#include "rcar_du_drv.h"
+#include "rcar_du_kms.h"
+#include "rcar_du_regs.h"
+
+/* -----------------------------------------------------------------------------
+ * Core device operations
+ */
+
+/*
+ * rcar_du_get - Acquire a reference to the DU
+ *
+ * Acquiring a reference enables the device clock and setup core registers. A
+ * reference must be held before accessing any hardware registers.
+ *
+ * This function must be called with the DRM mode_config lock held.
+ *
+ * Return 0 in case of success or a negative error code otherwise.
+ */
+int rcar_du_get(struct rcar_du_device *rcdu)
+{
+ int ret;
+
+ if (rcdu->use_count)
+ goto done;
+
+ /* Enable clocks before accessing the hardware. */
+ ret = clk_prepare_enable(rcdu->clock);
+ if (ret < 0)
+ return ret;
+
+ /* Enable extended features */
+ rcar_du_write(rcdu, DEFR, DEFR_CODE | DEFR_DEFE);
+ rcar_du_write(rcdu, DEFR2, DEFR2_CODE | DEFR2_DEFE2G);
+ rcar_du_write(rcdu, DEFR3, DEFR3_CODE | DEFR3_DEFE3);
+ rcar_du_write(rcdu, DEFR4, DEFR4_CODE);
+ rcar_du_write(rcdu, DEFR5, DEFR5_CODE | DEFR5_DEFE5);
+
+ /* Use DS1PR and DS2PR to configure planes priorities and connects the
+ * superposition 0 to DU0 pins. DU1 pins will be configured dynamically.
+ */
+ rcar_du_write(rcdu, DORCR, DORCR_PG1D_DS1 | DORCR_DPRS);
+
+done:
+ rcdu->use_count++;
+ return 0;
+}
+
+/*
+ * rcar_du_put - Release a reference to the DU
+ *
+ * Releasing the last reference disables the device clock.
+ *
+ * This function must be called with the DRM mode_config lock held.
+ */
+void rcar_du_put(struct rcar_du_device *rcdu)
+{
+ if (--rcdu->use_count)
+ return;
+
+ clk_disable_unprepare(rcdu->clock);
+}
+
+/* -----------------------------------------------------------------------------
+ * DRM operations
+ */
+
+static int rcar_du_unload(struct drm_device *dev)
+{
+ drm_kms_helper_poll_fini(dev);
+ drm_mode_config_cleanup(dev);
+ drm_vblank_cleanup(dev);
+ drm_irq_uninstall(dev);
+
+ dev->dev_private = NULL;
+
+ return 0;
+}
+
+static int rcar_du_load(struct drm_device *dev, unsigned long flags)
+{
+ struct platform_device *pdev = dev->platformdev;
+ struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
+ struct rcar_du_device *rcdu;
+ struct resource *ioarea;
+ struct resource *mem;
+ int ret;
+
+ if (pdata == NULL) {
+ dev_err(dev->dev, "no platform data\n");
+ return -ENODEV;
+ }
+
+ rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
+ if (rcdu == NULL) {
+ dev_err(dev->dev, "failed to allocate private data\n");
+ return -ENOMEM;
+ }
+
+ rcdu->dev = &pdev->dev;
+ rcdu->pdata = pdata;
+ rcdu->ddev = dev;
+ dev->dev_private = rcdu;
+
+ /* I/O resources and clocks */
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (mem == NULL) {
+ dev_err(&pdev->dev, "failed to get memory resource\n");
+ return -EINVAL;
+ }
+
+ ioarea = devm_request_mem_region(&pdev->dev, mem->start,
+ resource_size(mem), pdev->name);
+ if (ioarea == NULL) {
+ dev_err(&pdev->dev, "failed to request memory region\n");
+ return -EBUSY;
+ }
+
+ rcdu->mmio = devm_ioremap_nocache(&pdev->dev, ioarea->start,
+ resource_size(ioarea));
+ if (rcdu->mmio == NULL) {
+ dev_err(&pdev->dev, "failed to remap memory resource\n");
+ return -ENOMEM;
+ }
+
+ rcdu->clock = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(rcdu->clock)) {
+ dev_err(&pdev->dev, "failed to get clock\n");
+ return -ENOENT;
+ }
+
+ /* DRM/KMS objects */
+ ret = rcar_du_modeset_init(rcdu);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
+ goto done;
+ }
+
+ /* IRQ and vblank handling */
+ ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to initialize vblank\n");
+ goto done;
+ }
+
+ ret = drm_irq_install(dev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to install IRQ handler\n");
+ goto done;
+ }
+
+ platform_set_drvdata(pdev, rcdu);
+
+done:
+ if (ret)
+ rcar_du_unload(dev);
+
+ return ret;
+}
+
+static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
+{
+ struct rcar_du_device *rcdu = dev->dev_private;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(rcdu->crtcs); ++i)
+ rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
+}
+
+static irqreturn_t rcar_du_irq(int irq, void *arg)
+{
+ struct drm_device *dev = arg;
+ struct rcar_du_device *rcdu = dev->dev_private;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(rcdu->crtcs); ++i)
+ rcar_du_crtc_irq(&rcdu->crtcs[i]);
+
+ return IRQ_HANDLED;
+}
+
+static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
+{
+ struct rcar_du_device *rcdu = dev->dev_private;
+
+ rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
+
+ return 0;
+}
+
+static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
+{
+ struct rcar_du_device *rcdu = dev->dev_private;
+
+ rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
+}
+
+static const struct file_operations rcar_du_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,
+ .fasync = drm_fasync,
+ .llseek = no_llseek,
+ .mmap = drm_gem_cma_mmap,
+};
+
+static struct drm_driver rcar_du_driver = {
+ .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
+ | DRIVER_PRIME,
+ .load = rcar_du_load,
+ .unload = rcar_du_unload,
+ .preclose = rcar_du_preclose,
+ .irq_handler = rcar_du_irq,
+ .get_vblank_counter = drm_vblank_count,
+ .enable_vblank = rcar_du_enable_vblank,
+ .disable_vblank = rcar_du_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_cma_dmabuf_import,
+ .gem_prime_export = drm_gem_cma_dmabuf_export,
+ .dumb_create = rcar_du_dumb_create,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .dumb_destroy = drm_gem_cma_dumb_destroy,
+ .fops = &rcar_du_fops,
+ .name = "rcar-du",
+ .desc = "Renesas R-Car Display Unit",
+ .date = "20130110",
+ .major = 1,
+ .minor = 0,
+};
+
+/* -----------------------------------------------------------------------------
+ * Power management
+ */
+
+#if CONFIG_PM_SLEEP
+static int rcar_du_pm_suspend(struct device *dev)
+{
+ struct rcar_du_device *rcdu = dev_get_drvdata(dev);
+
+ drm_kms_helper_poll_disable(rcdu->ddev);
+ /* TODO Suspend the CRTC */
+
+ return 0;
+}
+
+static int rcar_du_pm_resume(struct device *dev)
+{
+ struct rcar_du_device *rcdu = dev_get_drvdata(dev);
+
+ /* TODO Resume the CRTC */
+
+ drm_kms_helper_poll_enable(rcdu->ddev);
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops rcar_du_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
+};
+
+/* -----------------------------------------------------------------------------
+ * Platform driver
+ */
+
+static int rcar_du_probe(struct platform_device *pdev)
+{
+ return drm_platform_init(&rcar_du_driver, pdev);
+}
+
+static int rcar_du_remove(struct platform_device *pdev)
+{
+ drm_platform_exit(&rcar_du_driver, pdev);
+
+ return 0;
+}
+
+static struct platform_driver rcar_du_platform_driver = {
+ .probe = rcar_du_probe,
+ .remove = rcar_du_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "rcar-du",
+ .pm = &rcar_du_pm_ops,
+ },
+};
+
+module_platform_driver(rcar_du_platform_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
+MODULE_LICENSE("GPL");