Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 372 insertions, 0 deletions

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
new file mode 100644
index 000000000..a395f9344
--- /dev/null
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
@@ -0,0 +1,372 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * Freescale DCU drm device driver
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/console.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/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_dma.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_modeset_helper.h>
+#include <drm/drm_module.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "fsl_dcu_drm_crtc.h"
+#include "fsl_dcu_drm_drv.h"
+#include "fsl_tcon.h"
+
+static int legacyfb_depth = 24;
+module_param(legacyfb_depth, int, 0444);
+
+static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+	if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
+		return true;
+
+	return false;
+}
+
+static const struct regmap_config fsl_dcu_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+
+	.volatile_reg = fsl_dcu_drm_is_volatile_reg,
+};
+
+static void fsl_dcu_irq_reset(struct drm_device *dev)
+{
+	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+
+	regmap_write(fsl_dev->regmap, DCU_INT_STATUS, ~0);
+	regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
+}
+
+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, "read DCU_INT_STATUS failed\n");
+		return IRQ_NONE;
+	}
+
+	if (int_status & DCU_INT_STATUS_VBLANK)
+		drm_handle_vblank(dev, 0);
+
+	regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
+
+	return IRQ_HANDLED;
+}
+
+static int fsl_dcu_irq_install(struct drm_device *dev, unsigned int irq)
+{
+	if (irq == IRQ_NOTCONNECTED)
+		return -ENOTCONN;
+
+	fsl_dcu_irq_reset(dev);
+
+	return request_irq(irq, fsl_dcu_drm_irq, 0, dev->driver->name, dev);
+}
+
+static void fsl_dcu_irq_uninstall(struct drm_device *dev)
+{
+	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+
+	fsl_dcu_irq_reset(dev);
+	free_irq(fsl_dev->irq, dev);
+}
+
+static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
+{
+	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+	int ret;
+
+	ret = fsl_dcu_drm_modeset_init(fsl_dev);
+	if (ret < 0) {
+		dev_err(dev->dev, "failed to initialize mode setting\n");
+		return ret;
+	}
+
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (ret < 0) {
+		dev_err(dev->dev, "failed to initialize vblank\n");
+		goto done_vblank;
+	}
+
+	ret = fsl_dcu_irq_install(dev, fsl_dev->irq);
+	if (ret < 0) {
+		dev_err(dev->dev, "failed to install IRQ handler\n");
+		goto done_irq;
+	}
+
+	if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
+	    legacyfb_depth != 32) {
+		dev_warn(dev->dev,
+			"Invalid legacyfb_depth.  Defaulting to 24bpp\n");
+		legacyfb_depth = 24;
+	}
+
+	return 0;
+done_irq:
+	drm_kms_helper_poll_fini(dev);
+
+	drm_mode_config_cleanup(dev);
+done_vblank:
+	dev->dev_private = NULL;
+
+	return ret;
+}
+
+static void fsl_dcu_unload(struct drm_device *dev)
+{
+	drm_atomic_helper_shutdown(dev);
+	drm_kms_helper_poll_fini(dev);
+
+	drm_mode_config_cleanup(dev);
+	fsl_dcu_irq_uninstall(dev);
+
+	dev->dev_private = NULL;
+}
+
+DEFINE_DRM_GEM_DMA_FOPS(fsl_dcu_drm_fops);
+
+static const struct drm_driver fsl_dcu_drm_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+	.load			= fsl_dcu_load,
+	.unload			= fsl_dcu_unload,
+	DRM_GEM_DMA_DRIVER_OPS,
+	.fops			= &fsl_dcu_drm_fops,
+	.name			= "fsl-dcu-drm",
+	.desc			= "Freescale DCU DRM",
+	.date			= "20160425",
+	.major			= 1,
+	.minor			= 1,
+};
+
+#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);
+	int ret;
+
+	if (!fsl_dev)
+		return 0;
+
+	disable_irq(fsl_dev->irq);
+
+	ret = drm_mode_config_helper_suspend(fsl_dev->drm);
+	if (ret) {
+		enable_irq(fsl_dev->irq);
+		return ret;
+	}
+
+	clk_disable_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_prepare_enable(fsl_dev->clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable dcu clk\n");
+		return ret;
+	}
+
+	if (fsl_dev->tcon)
+		fsl_tcon_bypass_enable(fsl_dev->tcon);
+	fsl_dcu_drm_init_planes(fsl_dev->drm);
+	enable_irq(fsl_dev->irq);
+
+	drm_mode_config_helper_resume(fsl_dev->drm);
+
+	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,
+	.layer_regs = LS1021A_LAYER_REG_NUM,
+};
+
+static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
+	.name = "vf610",
+	.total_layer = 64,
+	.max_layer = 6,
+	.layer_regs = VF610_LAYER_REG_NUM,
+};
+
+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 clk *pix_clk_in;
+	char pix_clk_name[32];
+	const char *pix_clk_in_name;
+	const struct of_device_id *id;
+	int ret;
+	u8 div_ratio_shift = 0;
+
+	fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
+	if (!fsl_dev)
+		return -ENOMEM;
+
+	id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
+	if (!id)
+		return -ENODEV;
+	fsl_dev->soc = id->data;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	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 fsl_dev->irq;
+	}
+
+	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);
+	}
+
+	fsl_dev->clk = devm_clk_get(dev, "dcu");
+	if (IS_ERR(fsl_dev->clk)) {
+		dev_err(dev, "failed to get dcu clock\n");
+		return PTR_ERR(fsl_dev->clk);
+	}
+	ret = clk_prepare_enable(fsl_dev->clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable dcu clk\n");
+		return ret;
+	}
+
+	pix_clk_in = devm_clk_get(dev, "pix");
+	if (IS_ERR(pix_clk_in)) {
+		/* legancy binding, use dcu clock as pixel clock input */
+		pix_clk_in = fsl_dev->clk;
+	}
+
+	if (of_property_read_bool(dev->of_node, "big-endian"))
+		div_ratio_shift = 24;
+
+	pix_clk_in_name = __clk_get_name(pix_clk_in);
+	snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
+	fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
+			pix_clk_in_name, 0, base + DCU_DIV_RATIO,
+			div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
+	if (IS_ERR(fsl_dev->pix_clk)) {
+		dev_err(dev, "failed to register pix clk\n");
+		ret = PTR_ERR(fsl_dev->pix_clk);
+		goto disable_clk;
+	}
+
+	fsl_dev->tcon = fsl_tcon_init(dev);
+
+	drm = drm_dev_alloc(&fsl_dcu_drm_driver, dev);
+	if (IS_ERR(drm)) {
+		ret = PTR_ERR(drm);
+		goto unregister_pix_clk;
+	}
+
+	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);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret < 0)
+		goto put;
+
+	drm_fbdev_dma_setup(drm, legacyfb_depth);
+
+	return 0;
+
+put:
+	drm_dev_put(drm);
+unregister_pix_clk:
+	clk_unregister(fsl_dev->pix_clk);
+disable_clk:
+	clk_disable_unprepare(fsl_dev->clk);
+	return ret;
+}
+
+static void fsl_dcu_drm_remove(struct platform_device *pdev)
+{
+	struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
+
+	drm_dev_unregister(fsl_dev->drm);
+	drm_dev_put(fsl_dev->drm);
+	clk_disable_unprepare(fsl_dev->clk);
+	clk_unregister(fsl_dev->pix_clk);
+}
+
+static struct platform_driver fsl_dcu_drm_platform_driver = {
+	.probe		= fsl_dcu_drm_probe,
+	.remove_new	= fsl_dcu_drm_remove,
+	.driver		= {
+		.name	= "fsl-dcu",
+		.pm	= &fsl_dcu_drm_pm_ops,
+		.of_match_table = fsl_dcu_of_match,
+	},
+};
+
+drm_module_platform_driver(fsl_dcu_drm_platform_driver);
+
+MODULE_DESCRIPTION("Freescale DCU DRM Driver");
+MODULE_LICENSE("GPL");