1 files changed, 579 insertions, 0 deletions

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
new file mode 100644
index 000000000000..7320a6c6613f
--- /dev/null
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
@@ -0,0 +1,579 @@
+/*
+ * Copyright (C) 2014 Traphandler
+ * Copyright (C) 2014 Free Electrons
+ * Copyright (C) 2014 Atmel
+ *
+ * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
+ * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/clk.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+
+#include "atmel_hlcdc_dc.h"
+
+#define ATMEL_HLCDC_LAYER_IRQS_OFFSET		8
+
+static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d3_layers[] = {
+	{
+		.name = "base",
+		.formats = &atmel_hlcdc_plane_rgb_formats,
+		.regs_offset = 0x40,
+		.id = 0,
+		.type = ATMEL_HLCDC_BASE_LAYER,
+		.nconfigs = 7,
+		.layout = {
+			.xstride = { 2 },
+			.default_color = 3,
+			.general_config = 4,
+			.disc_pos = 5,
+			.disc_size = 6,
+		},
+	},
+	{
+		.name = "overlay1",
+		.formats = &atmel_hlcdc_plane_rgb_formats,
+		.regs_offset = 0x140,
+		.id = 1,
+		.type = ATMEL_HLCDC_OVERLAY_LAYER,
+		.nconfigs = 10,
+		.layout = {
+			.pos = 2,
+			.size = 3,
+			.xstride = { 4 },
+			.pstride = { 5 },
+			.default_color = 6,
+			.chroma_key = 7,
+			.chroma_key_mask = 8,
+			.general_config = 9,
+		},
+	},
+	{
+		.name = "overlay2",
+		.formats = &atmel_hlcdc_plane_rgb_formats,
+		.regs_offset = 0x240,
+		.id = 2,
+		.type = ATMEL_HLCDC_OVERLAY_LAYER,
+		.nconfigs = 10,
+		.layout = {
+			.pos = 2,
+			.size = 3,
+			.xstride = { 4 },
+			.pstride = { 5 },
+			.default_color = 6,
+			.chroma_key = 7,
+			.chroma_key_mask = 8,
+			.general_config = 9,
+		},
+	},
+	{
+		.name = "high-end-overlay",
+		.formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
+		.regs_offset = 0x340,
+		.id = 3,
+		.type = ATMEL_HLCDC_OVERLAY_LAYER,
+		.nconfigs = 42,
+		.layout = {
+			.pos = 2,
+			.size = 3,
+			.memsize = 4,
+			.xstride = { 5, 7 },
+			.pstride = { 6, 8 },
+			.default_color = 9,
+			.chroma_key = 10,
+			.chroma_key_mask = 11,
+			.general_config = 12,
+			.csc = 14,
+		},
+	},
+	{
+		.name = "cursor",
+		.formats = &atmel_hlcdc_plane_rgb_formats,
+		.regs_offset = 0x440,
+		.id = 4,
+		.type = ATMEL_HLCDC_CURSOR_LAYER,
+		.nconfigs = 10,
+		.max_width = 128,
+		.max_height = 128,
+		.layout = {
+			.pos = 2,
+			.size = 3,
+			.xstride = { 4 },
+			.pstride = { 5 },
+			.default_color = 6,
+			.chroma_key = 7,
+			.chroma_key_mask = 8,
+			.general_config = 9,
+		},
+	},
+};
+
+static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
+	.min_width = 0,
+	.min_height = 0,
+	.max_width = 2048,
+	.max_height = 2048,
+	.nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
+	.layers = atmel_hlcdc_sama5d3_layers,
+};
+
+static const struct of_device_id atmel_hlcdc_of_match[] = {
+	{
+		.compatible = "atmel,sama5d3-hlcdc",
+		.data = &atmel_hlcdc_dc_sama5d3,
+	},
+	{ /* sentinel */ },
+};
+
+int atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
+			      struct drm_display_mode *mode)
+{
+	int vfront_porch = mode->vsync_start - mode->vdisplay;
+	int vback_porch = mode->vtotal - mode->vsync_end;
+	int vsync_len = mode->vsync_end - mode->vsync_start;
+	int hfront_porch = mode->hsync_start - mode->hdisplay;
+	int hback_porch = mode->htotal - mode->hsync_end;
+	int hsync_len = mode->hsync_end - mode->hsync_start;
+
+	if (hsync_len > 0x40 || hsync_len < 1)
+		return MODE_HSYNC;
+
+	if (vsync_len > 0x40 || vsync_len < 1)
+		return MODE_VSYNC;
+
+	if (hfront_porch > 0x200 || hfront_porch < 1 ||
+	    hback_porch > 0x200 || hback_porch < 1 ||
+	    mode->hdisplay < 1)
+		return MODE_H_ILLEGAL;
+
+	if (vfront_porch > 0x40 || vfront_porch < 1 ||
+	    vback_porch > 0x40 || vback_porch < 0 ||
+	    mode->vdisplay < 1)
+		return MODE_V_ILLEGAL;
+
+	return MODE_OK;
+}
+
+static irqreturn_t atmel_hlcdc_dc_irq_handler(int irq, void *data)
+{
+	struct drm_device *dev = data;
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+	unsigned long status;
+	unsigned int imr, isr;
+	int i;
+
+	regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_IMR, &imr);
+	regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
+	status = imr & isr;
+	if (!status)
+		return IRQ_NONE;
+
+	if (status & ATMEL_HLCDC_SOF)
+		atmel_hlcdc_crtc_irq(dc->crtc);
+
+	for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
+		struct atmel_hlcdc_layer *layer = dc->layers[i];
+
+		if (!(ATMEL_HLCDC_LAYER_STATUS(i) & status) || !layer)
+			continue;
+
+		atmel_hlcdc_layer_irq(layer);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static struct drm_framebuffer *atmel_hlcdc_fb_create(struct drm_device *dev,
+		struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd)
+{
+	return drm_fb_cma_create(dev, file_priv, mode_cmd);
+}
+
+static void atmel_hlcdc_fb_output_poll_changed(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+
+	if (dc->fbdev) {
+		drm_fbdev_cma_hotplug_event(dc->fbdev);
+	} else {
+		dc->fbdev = drm_fbdev_cma_init(dev, 24,
+				dev->mode_config.num_crtc,
+				dev->mode_config.num_connector);
+		if (IS_ERR(dc->fbdev))
+			dc->fbdev = NULL;
+	}
+}
+
+static const struct drm_mode_config_funcs mode_config_funcs = {
+	.fb_create = atmel_hlcdc_fb_create,
+	.output_poll_changed = atmel_hlcdc_fb_output_poll_changed,
+};
+
+static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+	struct atmel_hlcdc_planes *planes;
+	int ret;
+	int i;
+
+	drm_mode_config_init(dev);
+
+	ret = atmel_hlcdc_create_outputs(dev);
+	if (ret) {
+		dev_err(dev->dev, "failed to create panel: %d\n", ret);
+		return ret;
+	}
+
+	planes = atmel_hlcdc_create_planes(dev);
+	if (IS_ERR(planes)) {
+		dev_err(dev->dev, "failed to create planes\n");
+		return PTR_ERR(planes);
+	}
+
+	dc->planes = planes;
+
+	dc->layers[planes->primary->layer.desc->id] =
+						&planes->primary->layer;
+
+	if (planes->cursor)
+		dc->layers[planes->cursor->layer.desc->id] =
+							&planes->cursor->layer;
+
+	for (i = 0; i < planes->noverlays; i++)
+		dc->layers[planes->overlays[i]->layer.desc->id] =
+						&planes->overlays[i]->layer;
+
+	ret = atmel_hlcdc_crtc_create(dev);
+	if (ret) {
+		dev_err(dev->dev, "failed to create crtc\n");
+		return ret;
+	}
+
+	dev->mode_config.min_width = dc->desc->min_width;
+	dev->mode_config.min_height = dc->desc->min_height;
+	dev->mode_config.max_width = dc->desc->max_width;
+	dev->mode_config.max_height = dc->desc->max_height;
+	dev->mode_config.funcs = &mode_config_funcs;
+
+	return 0;
+}
+
+static int atmel_hlcdc_dc_load(struct drm_device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev->dev);
+	const struct of_device_id *match;
+	struct atmel_hlcdc_dc *dc;
+	int ret;
+
+	match = of_match_node(atmel_hlcdc_of_match, dev->dev->parent->of_node);
+	if (!match) {
+		dev_err(&pdev->dev, "invalid compatible string\n");
+		return -ENODEV;
+	}
+
+	if (!match->data) {
+		dev_err(&pdev->dev, "invalid hlcdc description\n");
+		return -EINVAL;
+	}
+
+	dc = devm_kzalloc(dev->dev, sizeof(*dc), GFP_KERNEL);
+	if (!dc)
+		return -ENOMEM;
+
+	dc->wq = alloc_ordered_workqueue("atmel-hlcdc-dc", 0);
+	if (!dc->wq)
+		return -ENOMEM;
+
+	dc->desc = match->data;
+	dc->hlcdc = dev_get_drvdata(dev->dev->parent);
+	dev->dev_private = dc;
+
+	ret = clk_prepare_enable(dc->hlcdc->periph_clk);
+	if (ret) {
+		dev_err(dev->dev, "failed to enable periph_clk\n");
+		goto err_destroy_wq;
+	}
+
+	pm_runtime_enable(dev->dev);
+
+	pm_runtime_put_sync(dev->dev);
+
+	ret = atmel_hlcdc_dc_modeset_init(dev);
+	if (ret < 0) {
+		dev_err(dev->dev, "failed to initialize mode setting\n");
+		goto err_periph_clk_disable;
+	}
+
+	ret = drm_vblank_init(dev, 1);
+	if (ret < 0) {
+		dev_err(dev->dev, "failed to initialize vblank\n");
+		goto err_periph_clk_disable;
+	}
+
+	pm_runtime_get_sync(dev->dev);
+	ret = drm_irq_install(dev, dc->hlcdc->irq);
+	pm_runtime_put_sync(dev->dev);
+	if (ret < 0) {
+		dev_err(dev->dev, "failed to install IRQ handler\n");
+		goto err_periph_clk_disable;
+	}
+
+	platform_set_drvdata(pdev, dev);
+
+	drm_kms_helper_poll_init(dev);
+
+	/* force connectors detection */
+	drm_helper_hpd_irq_event(dev);
+
+	return 0;
+
+err_periph_clk_disable:
+	pm_runtime_disable(dev->dev);
+	clk_disable_unprepare(dc->hlcdc->periph_clk);
+
+err_destroy_wq:
+	destroy_workqueue(dc->wq);
+
+	return ret;
+}
+
+static void atmel_hlcdc_dc_unload(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+
+	if (dc->fbdev)
+		drm_fbdev_cma_fini(dc->fbdev);
+	flush_workqueue(dc->wq);
+	drm_kms_helper_poll_fini(dev);
+	drm_mode_config_cleanup(dev);
+	drm_vblank_cleanup(dev);
+
+	pm_runtime_get_sync(dev->dev);
+	drm_irq_uninstall(dev);
+	pm_runtime_put_sync(dev->dev);
+
+	dev->dev_private = NULL;
+
+	pm_runtime_disable(dev->dev);
+	clk_disable_unprepare(dc->hlcdc->periph_clk);
+	destroy_workqueue(dc->wq);
+}
+
+static int atmel_hlcdc_dc_connector_plug_all(struct drm_device *dev)
+{
+	struct drm_connector *connector, *failed;
+	int ret;
+
+	mutex_lock(&dev->mode_config.mutex);
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		ret = drm_connector_register(connector);
+		if (ret) {
+			failed = connector;
+			goto err;
+		}
+	}
+	mutex_unlock(&dev->mode_config.mutex);
+	return 0;
+
+err:
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		if (failed == connector)
+			break;
+
+		drm_connector_unregister(connector);
+	}
+	mutex_unlock(&dev->mode_config.mutex);
+
+	return ret;
+}
+
+static void atmel_hlcdc_dc_connector_unplug_all(struct drm_device *dev)
+{
+	mutex_lock(&dev->mode_config.mutex);
+	drm_connector_unplug_all(dev);
+	mutex_unlock(&dev->mode_config.mutex);
+}
+
+static void atmel_hlcdc_dc_preclose(struct drm_device *dev,
+				    struct drm_file *file)
+{
+	struct drm_crtc *crtc;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+		atmel_hlcdc_crtc_cancel_page_flip(crtc, file);
+}
+
+static void atmel_hlcdc_dc_lastclose(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+
+	drm_fbdev_cma_restore_mode(dc->fbdev);
+}
+
+static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+	unsigned int cfg = 0;
+	int i;
+
+	/* Enable interrupts on activated layers */
+	for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
+		if (dc->layers[i])
+			cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
+	}
+
+	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
+
+	return 0;
+}
+
+static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+	unsigned int isr;
+
+	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
+	regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
+}
+
+static int atmel_hlcdc_dc_enable_vblank(struct drm_device *dev, int crtc)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+
+	/* Enable SOF (Start Of Frame) interrupt for vblank counting */
+	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, ATMEL_HLCDC_SOF);
+
+	return 0;
+}
+
+static void atmel_hlcdc_dc_disable_vblank(struct drm_device *dev, int crtc)
+{
+	struct atmel_hlcdc_dc *dc = dev->dev_private;
+
+	regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, ATMEL_HLCDC_SOF);
+}
+
+static const struct file_operations 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 atmel_hlcdc_dc_driver = {
+	.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
+	.preclose = atmel_hlcdc_dc_preclose,
+	.lastclose = atmel_hlcdc_dc_lastclose,
+	.irq_handler = atmel_hlcdc_dc_irq_handler,
+	.irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
+	.irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
+	.irq_uninstall = atmel_hlcdc_dc_irq_uninstall,
+	.get_vblank_counter = drm_vblank_count,
+	.enable_vblank = atmel_hlcdc_dc_enable_vblank,
+	.disable_vblank = atmel_hlcdc_dc_disable_vblank,
+	.gem_free_object = drm_gem_cma_free_object,
+	.gem_vm_ops = &drm_gem_cma_vm_ops,
+	.dumb_create = drm_gem_cma_dumb_create,
+	.dumb_map_offset = drm_gem_cma_dumb_map_offset,
+	.dumb_destroy = drm_gem_dumb_destroy,
+	.fops = &fops,
+	.name = "atmel-hlcdc",
+	.desc = "Atmel HLCD Controller DRM",
+	.date = "20141504",
+	.major = 1,
+	.minor = 0,
+};
+
+static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
+{
+	struct drm_device *ddev;
+	int ret;
+
+	ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev);
+	if (!ddev)
+		return -ENOMEM;
+
+	ret = drm_dev_set_unique(ddev, dev_name(ddev->dev));
+	if (ret)
+		goto err_unref;
+
+	ret = atmel_hlcdc_dc_load(ddev);
+	if (ret)
+		goto err_unref;
+
+	ret = drm_dev_register(ddev, 0);
+	if (ret)
+		goto err_unload;
+
+	ret = atmel_hlcdc_dc_connector_plug_all(ddev);
+	if (ret)
+		goto err_unregister;
+
+	return 0;
+
+err_unregister:
+	drm_dev_unregister(ddev);
+
+err_unload:
+	atmel_hlcdc_dc_unload(ddev);
+
+err_unref:
+	drm_dev_unref(ddev);
+
+	return ret;
+}
+
+static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev)
+{
+	struct drm_device *ddev = platform_get_drvdata(pdev);
+
+	atmel_hlcdc_dc_connector_unplug_all(ddev);
+	drm_dev_unregister(ddev);
+	atmel_hlcdc_dc_unload(ddev);
+	drm_dev_unref(ddev);
+
+	return 0;
+}
+
+static const struct of_device_id atmel_hlcdc_dc_of_match[] = {
+	{ .compatible = "atmel,hlcdc-display-controller" },
+	{ },
+};
+
+static struct platform_driver atmel_hlcdc_dc_platform_driver = {
+	.probe	= atmel_hlcdc_dc_drm_probe,
+	.remove	= atmel_hlcdc_dc_drm_remove,
+	.driver	= {
+		.name	= "atmel-hlcdc-display-controller",
+		.of_match_table = atmel_hlcdc_dc_of_match,
+	},
+};
+module_platform_driver(atmel_hlcdc_dc_platform_driver);
+
+MODULE_AUTHOR("Jean-Jacques Hiblot <jjhiblot@traphandler.com>");
+MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
+MODULE_DESCRIPTION("Atmel HLCDC Display Controller DRM Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:atmel-hlcdc-dc");