diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_rotator.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_rotator.c | 463 |
1 files changed, 463 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c b/drivers/gpu/drm/exynos/exynos_drm_rotator.c new file mode 100644 index 000000000..ffb327c51 --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_rotator.c @@ -0,0 +1,463 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2012 Samsung Electronics Co.Ltd + * Authors: + * YoungJun Cho <yj44.cho@samsung.com> + * Eunchul Kim <chulspro.kim@samsung.com> + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/sizes.h> + +#include <drm/drm_fourcc.h> +#include <drm/exynos_drm.h> + +#include "exynos_drm_drv.h" +#include "exynos_drm_ipp.h" +#include "regs-rotator.h" + +/* + * Rotator supports image crop/rotator and input/output DMA operations. + * input DMA reads image data from the memory. + * output DMA writes image data to memory. + */ + +#define ROTATOR_AUTOSUSPEND_DELAY 2000 + +#define rot_read(offset) readl(rot->regs + (offset)) +#define rot_write(cfg, offset) writel(cfg, rot->regs + (offset)) + +enum rot_irq_status { + ROT_IRQ_STATUS_COMPLETE = 8, + ROT_IRQ_STATUS_ILLEGAL = 9, +}; + +struct rot_variant { + const struct exynos_drm_ipp_formats *formats; + unsigned int num_formats; +}; + +/* + * A structure of rotator context. + * @ippdrv: prepare initialization using ippdrv. + * @regs: memory mapped io registers. + * @clock: rotator gate clock. + * @limit_tbl: limitation of rotator. + * @irq: irq number. + */ +struct rot_context { + struct exynos_drm_ipp ipp; + struct drm_device *drm_dev; + void *dma_priv; + struct device *dev; + void __iomem *regs; + struct clk *clock; + const struct exynos_drm_ipp_formats *formats; + unsigned int num_formats; + struct exynos_drm_ipp_task *task; +}; + +static void rotator_reg_set_irq(struct rot_context *rot, bool enable) +{ + u32 val = rot_read(ROT_CONFIG); + + if (enable == true) + val |= ROT_CONFIG_IRQ; + else + val &= ~ROT_CONFIG_IRQ; + + rot_write(val, ROT_CONFIG); +} + +static enum rot_irq_status rotator_reg_get_irq_status(struct rot_context *rot) +{ + u32 val = rot_read(ROT_STATUS); + + val = ROT_STATUS_IRQ(val); + + if (val == ROT_STATUS_IRQ_VAL_COMPLETE) + return ROT_IRQ_STATUS_COMPLETE; + + return ROT_IRQ_STATUS_ILLEGAL; +} + +static irqreturn_t rotator_irq_handler(int irq, void *arg) +{ + struct rot_context *rot = arg; + enum rot_irq_status irq_status; + u32 val; + + /* Get execution result */ + irq_status = rotator_reg_get_irq_status(rot); + + /* clear status */ + val = rot_read(ROT_STATUS); + val |= ROT_STATUS_IRQ_PENDING((u32)irq_status); + rot_write(val, ROT_STATUS); + + if (rot->task) { + struct exynos_drm_ipp_task *task = rot->task; + + rot->task = NULL; + pm_runtime_mark_last_busy(rot->dev); + pm_runtime_put_autosuspend(rot->dev); + exynos_drm_ipp_task_done(task, + irq_status == ROT_IRQ_STATUS_COMPLETE ? 0 : -EINVAL); + } + + return IRQ_HANDLED; +} + +static void rotator_src_set_fmt(struct rot_context *rot, u32 fmt) +{ + u32 val; + + val = rot_read(ROT_CONTROL); + val &= ~ROT_CONTROL_FMT_MASK; + + switch (fmt) { + case DRM_FORMAT_NV12: + val |= ROT_CONTROL_FMT_YCBCR420_2P; + break; + case DRM_FORMAT_XRGB8888: + val |= ROT_CONTROL_FMT_RGB888; + break; + } + + rot_write(val, ROT_CONTROL); +} + +static void rotator_src_set_buf(struct rot_context *rot, + struct exynos_drm_ipp_buffer *buf) +{ + u32 val; + + /* Set buffer size configuration */ + val = ROT_SET_BUF_SIZE_H(buf->buf.height) | + ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]); + rot_write(val, ROT_SRC_BUF_SIZE); + + /* Set crop image position configuration */ + val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x); + rot_write(val, ROT_SRC_CROP_POS); + val = ROT_SRC_CROP_SIZE_H(buf->rect.h) | + ROT_SRC_CROP_SIZE_W(buf->rect.w); + rot_write(val, ROT_SRC_CROP_SIZE); + + /* Set buffer DMA address */ + rot_write(buf->dma_addr[0], ROT_SRC_BUF_ADDR(0)); + rot_write(buf->dma_addr[1], ROT_SRC_BUF_ADDR(1)); +} + +static void rotator_dst_set_transf(struct rot_context *rot, + unsigned int rotation) +{ + u32 val; + + /* Set transform configuration */ + val = rot_read(ROT_CONTROL); + val &= ~ROT_CONTROL_FLIP_MASK; + + if (rotation & DRM_MODE_REFLECT_X) + val |= ROT_CONTROL_FLIP_VERTICAL; + if (rotation & DRM_MODE_REFLECT_Y) + val |= ROT_CONTROL_FLIP_HORIZONTAL; + + val &= ~ROT_CONTROL_ROT_MASK; + + if (rotation & DRM_MODE_ROTATE_90) + val |= ROT_CONTROL_ROT_90; + else if (rotation & DRM_MODE_ROTATE_180) + val |= ROT_CONTROL_ROT_180; + else if (rotation & DRM_MODE_ROTATE_270) + val |= ROT_CONTROL_ROT_270; + + rot_write(val, ROT_CONTROL); +} + +static void rotator_dst_set_buf(struct rot_context *rot, + struct exynos_drm_ipp_buffer *buf) +{ + u32 val; + + /* Set buffer size configuration */ + val = ROT_SET_BUF_SIZE_H(buf->buf.height) | + ROT_SET_BUF_SIZE_W(buf->buf.pitch[0] / buf->format->cpp[0]); + rot_write(val, ROT_DST_BUF_SIZE); + + /* Set crop image position configuration */ + val = ROT_CROP_POS_Y(buf->rect.y) | ROT_CROP_POS_X(buf->rect.x); + rot_write(val, ROT_DST_CROP_POS); + + /* Set buffer DMA address */ + rot_write(buf->dma_addr[0], ROT_DST_BUF_ADDR(0)); + rot_write(buf->dma_addr[1], ROT_DST_BUF_ADDR(1)); +} + +static void rotator_start(struct rot_context *rot) +{ + u32 val; + + /* Set interrupt enable */ + rotator_reg_set_irq(rot, true); + + val = rot_read(ROT_CONTROL); + val |= ROT_CONTROL_START; + rot_write(val, ROT_CONTROL); +} + +static int rotator_commit(struct exynos_drm_ipp *ipp, + struct exynos_drm_ipp_task *task) +{ + struct rot_context *rot = + container_of(ipp, struct rot_context, ipp); + int ret; + + ret = pm_runtime_resume_and_get(rot->dev); + if (ret < 0) { + dev_err(rot->dev, "failed to enable ROTATOR device.\n"); + return ret; + } + rot->task = task; + + rotator_src_set_fmt(rot, task->src.buf.fourcc); + rotator_src_set_buf(rot, &task->src); + rotator_dst_set_transf(rot, task->transform.rotation); + rotator_dst_set_buf(rot, &task->dst); + rotator_start(rot); + + return 0; +} + +static const struct exynos_drm_ipp_funcs ipp_funcs = { + .commit = rotator_commit, +}; + +static int rotator_bind(struct device *dev, struct device *master, void *data) +{ + struct rot_context *rot = dev_get_drvdata(dev); + struct drm_device *drm_dev = data; + struct exynos_drm_ipp *ipp = &rot->ipp; + + rot->drm_dev = drm_dev; + ipp->drm_dev = drm_dev; + exynos_drm_register_dma(drm_dev, dev, &rot->dma_priv); + + exynos_drm_ipp_register(dev, ipp, &ipp_funcs, + DRM_EXYNOS_IPP_CAP_CROP | DRM_EXYNOS_IPP_CAP_ROTATE, + rot->formats, rot->num_formats, "rotator"); + + dev_info(dev, "The exynos rotator has been probed successfully\n"); + + return 0; +} + +static void rotator_unbind(struct device *dev, struct device *master, + void *data) +{ + struct rot_context *rot = dev_get_drvdata(dev); + struct exynos_drm_ipp *ipp = &rot->ipp; + + exynos_drm_ipp_unregister(dev, ipp); + exynos_drm_unregister_dma(rot->drm_dev, rot->dev, &rot->dma_priv); +} + +static const struct component_ops rotator_component_ops = { + .bind = rotator_bind, + .unbind = rotator_unbind, +}; + +static int rotator_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rot_context *rot; + const struct rot_variant *variant; + int irq; + int ret; + + rot = devm_kzalloc(dev, sizeof(*rot), GFP_KERNEL); + if (!rot) + return -ENOMEM; + + variant = of_device_get_match_data(dev); + rot->formats = variant->formats; + rot->num_formats = variant->num_formats; + rot->dev = dev; + rot->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(rot->regs)) + return PTR_ERR(rot->regs); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + ret = devm_request_irq(dev, irq, rotator_irq_handler, 0, dev_name(dev), + rot); + if (ret < 0) { + dev_err(dev, "failed to request irq\n"); + return ret; + } + + rot->clock = devm_clk_get(dev, "rotator"); + if (IS_ERR(rot->clock)) { + dev_err(dev, "failed to get clock\n"); + return PTR_ERR(rot->clock); + } + + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, ROTATOR_AUTOSUSPEND_DELAY); + pm_runtime_enable(dev); + platform_set_drvdata(pdev, rot); + + ret = component_add(dev, &rotator_component_ops); + if (ret) + goto err_component; + + return 0; + +err_component: + pm_runtime_dont_use_autosuspend(dev); + pm_runtime_disable(dev); + return ret; +} + +static int rotator_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + component_del(dev, &rotator_component_ops); + pm_runtime_dont_use_autosuspend(dev); + pm_runtime_disable(dev); + + return 0; +} + +static int rotator_runtime_suspend(struct device *dev) +{ + struct rot_context *rot = dev_get_drvdata(dev); + + clk_disable_unprepare(rot->clock); + return 0; +} + +static int rotator_runtime_resume(struct device *dev) +{ + struct rot_context *rot = dev_get_drvdata(dev); + + return clk_prepare_enable(rot->clock); +} + +static const struct drm_exynos_ipp_limit rotator_s5pv210_rbg888_limits[] = { + { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) }, + { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) }, +}; + +static const struct drm_exynos_ipp_limit rotator_4210_rbg888_limits[] = { + { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_16K }, .v = { 8, SZ_16K }) }, + { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) }, +}; + +static const struct drm_exynos_ipp_limit rotator_4412_rbg888_limits[] = { + { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) }, + { IPP_SIZE_LIMIT(AREA, .h.align = 4, .v.align = 4) }, +}; + +static const struct drm_exynos_ipp_limit rotator_5250_rbg888_limits[] = { + { IPP_SIZE_LIMIT(BUFFER, .h = { 8, SZ_8K }, .v = { 8, SZ_8K }) }, + { IPP_SIZE_LIMIT(AREA, .h.align = 2, .v.align = 2) }, +}; + +static const struct drm_exynos_ipp_limit rotator_s5pv210_yuv_limits[] = { + { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) }, + { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) }, +}; + +static const struct drm_exynos_ipp_limit rotator_4210_yuv_limits[] = { + { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_64K }, .v = { 32, SZ_64K }) }, + { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) }, +}; + +static const struct drm_exynos_ipp_limit rotator_4412_yuv_limits[] = { + { IPP_SIZE_LIMIT(BUFFER, .h = { 32, SZ_32K }, .v = { 32, SZ_32K }) }, + { IPP_SIZE_LIMIT(AREA, .h.align = 8, .v.align = 8) }, +}; + +static const struct exynos_drm_ipp_formats rotator_s5pv210_formats[] = { + { IPP_SRCDST_FORMAT(XRGB8888, rotator_s5pv210_rbg888_limits) }, + { IPP_SRCDST_FORMAT(NV12, rotator_s5pv210_yuv_limits) }, +}; + +static const struct exynos_drm_ipp_formats rotator_4210_formats[] = { + { IPP_SRCDST_FORMAT(XRGB8888, rotator_4210_rbg888_limits) }, + { IPP_SRCDST_FORMAT(NV12, rotator_4210_yuv_limits) }, +}; + +static const struct exynos_drm_ipp_formats rotator_4412_formats[] = { + { IPP_SRCDST_FORMAT(XRGB8888, rotator_4412_rbg888_limits) }, + { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) }, +}; + +static const struct exynos_drm_ipp_formats rotator_5250_formats[] = { + { IPP_SRCDST_FORMAT(XRGB8888, rotator_5250_rbg888_limits) }, + { IPP_SRCDST_FORMAT(NV12, rotator_4412_yuv_limits) }, +}; + +static const struct rot_variant rotator_s5pv210_data = { + .formats = rotator_s5pv210_formats, + .num_formats = ARRAY_SIZE(rotator_s5pv210_formats), +}; + +static const struct rot_variant rotator_4210_data = { + .formats = rotator_4210_formats, + .num_formats = ARRAY_SIZE(rotator_4210_formats), +}; + +static const struct rot_variant rotator_4412_data = { + .formats = rotator_4412_formats, + .num_formats = ARRAY_SIZE(rotator_4412_formats), +}; + +static const struct rot_variant rotator_5250_data = { + .formats = rotator_5250_formats, + .num_formats = ARRAY_SIZE(rotator_5250_formats), +}; + +static const struct of_device_id exynos_rotator_match[] = { + { + .compatible = "samsung,s5pv210-rotator", + .data = &rotator_s5pv210_data, + }, { + .compatible = "samsung,exynos4210-rotator", + .data = &rotator_4210_data, + }, { + .compatible = "samsung,exynos4212-rotator", + .data = &rotator_4412_data, + }, { + .compatible = "samsung,exynos5250-rotator", + .data = &rotator_5250_data, + }, { + }, +}; +MODULE_DEVICE_TABLE(of, exynos_rotator_match); + +static DEFINE_RUNTIME_DEV_PM_OPS(rotator_pm_ops, rotator_runtime_suspend, + rotator_runtime_resume, NULL); + +struct platform_driver rotator_driver = { + .probe = rotator_probe, + .remove = rotator_remove, + .driver = { + .name = "exynos-rotator", + .owner = THIS_MODULE, + .pm = pm_ptr(&rotator_pm_ops), + .of_match_table = exynos_rotator_match, + }, +}; |