--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ST stm32 Chrom-Art - 2D Graphics Accelerator Driver
+ *
+ * Copyright (c) 2021 Dillon Min
+ * Dillon Min, <dillon.minfei@gmail.com>
+ *
+ * based on s5p-g2d
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Kamil Debski, <k.debski@samsung.com>
+ */
+
+#include <linux/io.h>
+
+#include "dma2d.h"
+#include "dma2d-regs.h"
+
+static inline u32 reg_read(void __iomem *base, u32 reg)
+{
+ return readl_relaxed(base + reg);
+}
+
+static inline void reg_write(void __iomem *base, u32 reg, u32 val)
+{
+ writel_relaxed(val, base + reg);
+}
+
+static inline void reg_set(void __iomem *base, u32 reg, u32 mask)
+{
+ reg_write(base, reg, reg_read(base, reg) | mask);
+}
+
+static inline void reg_clear(void __iomem *base, u32 reg, u32 mask)
+{
+ reg_write(base, reg, reg_read(base, reg) & ~mask);
+}
+
+static inline void reg_update_bits(void __iomem *base, u32 reg, u32 mask,
+ u32 val)
+{
+ reg_write(base, reg, (reg_read(base, reg) & ~mask) | val);
+}
+
+void dma2d_start(struct dma2d_dev *d)
+{
+ reg_update_bits(d->regs, DMA2D_CR_REG, CR_START, CR_START);
+}
+
+u32 dma2d_get_int(struct dma2d_dev *d)
+{
+ return reg_read(d->regs, DMA2D_ISR_REG);
+}
+
+void dma2d_clear_int(struct dma2d_dev *d)
+{
+ u32 isr_val = reg_read(d->regs, DMA2D_ISR_REG);
+
+ reg_write(d->regs, DMA2D_IFCR_REG, isr_val & 0x003f);
+}
+
+void dma2d_config_common(struct dma2d_dev *d, enum dma2d_op_mode op_mode,
+ u16 width, u16 height)
+{
+ reg_update_bits(d->regs, DMA2D_CR_REG, CR_MODE_MASK,
+ op_mode << CR_MODE_SHIFT);
+
+ reg_write(d->regs, DMA2D_NLR_REG, (width << 16) | height);
+}
+
+void dma2d_config_out(struct dma2d_dev *d, struct dma2d_frame *frm,
+ dma_addr_t o_addr)
+{
+ reg_update_bits(d->regs, DMA2D_CR_REG, CR_CEIE, CR_CEIE);
+ reg_update_bits(d->regs, DMA2D_CR_REG, CR_CTCIE, CR_CTCIE);
+ reg_update_bits(d->regs, DMA2D_CR_REG, CR_CAEIE, CR_CAEIE);
+ reg_update_bits(d->regs, DMA2D_CR_REG, CR_TCIE, CR_TCIE);
+ reg_update_bits(d->regs, DMA2D_CR_REG, CR_TEIE, CR_TEIE);
+
+ if (frm->fmt->cmode >= CM_MODE_ARGB8888 &&
+ frm->fmt->cmode <= CM_MODE_ARGB4444)
+ reg_update_bits(d->regs, DMA2D_OPFCCR_REG, OPFCCR_CM_MASK,
+ frm->fmt->cmode);
+
+ reg_write(d->regs, DMA2D_OMAR_REG, o_addr);
+
+ reg_write(d->regs, DMA2D_OCOLR_REG,
+ (frm->a_rgb[3] << 24) |
+ (frm->a_rgb[2] << 16) |
+ (frm->a_rgb[1] << 8) |
+ frm->a_rgb[0]);
+
+ reg_update_bits(d->regs, DMA2D_OOR_REG, OOR_LO_MASK,
+ frm->line_offset & 0x3fff);
+}
+
+void dma2d_config_fg(struct dma2d_dev *d, struct dma2d_frame *frm,
+ dma_addr_t f_addr)
+{
+ reg_write(d->regs, DMA2D_FGMAR_REG, f_addr);
+ reg_update_bits(d->regs, DMA2D_FGOR_REG, FGOR_LO_MASK,
+ frm->line_offset);
+
+ if (frm->fmt->cmode >= CM_MODE_ARGB8888 &&
+ frm->fmt->cmode <= CM_MODE_A4)
+ reg_update_bits(d->regs, DMA2D_FGPFCCR_REG, FGPFCCR_CM_MASK,
+ frm->fmt->cmode);
+
+ reg_update_bits(d->regs, DMA2D_FGPFCCR_REG, FGPFCCR_AM_MASK,
+ (frm->a_mode << 16) & 0x03);
+
+ reg_update_bits(d->regs, DMA2D_FGPFCCR_REG, FGPFCCR_ALPHA_MASK,
+ frm->a_rgb[3] << 24);
+
+ reg_write(d->regs, DMA2D_FGCOLR_REG,
+ (frm->a_rgb[2] << 16) |
+ (frm->a_rgb[1] << 8) |
+ frm->a_rgb[0]);
+}
+
+void dma2d_config_bg(struct dma2d_dev *d, struct dma2d_frame *frm,
+ dma_addr_t b_addr)
+{
+ reg_write(d->regs, DMA2D_BGMAR_REG, b_addr);
+ reg_update_bits(d->regs, DMA2D_BGOR_REG, BGOR_LO_MASK,
+ frm->line_offset);
+
+ if (frm->fmt->cmode >= CM_MODE_ARGB8888 &&
+ frm->fmt->cmode <= CM_MODE_A4)
+ reg_update_bits(d->regs, DMA2D_BGPFCCR_REG, BGPFCCR_CM_MASK,
+ frm->fmt->cmode);
+
+ reg_update_bits(d->regs, DMA2D_BGPFCCR_REG, BGPFCCR_AM_MASK,
+ (frm->a_mode << 16) & 0x03);
+
+ reg_update_bits(d->regs, DMA2D_BGPFCCR_REG, BGPFCCR_ALPHA_MASK,
+ frm->a_rgb[3] << 24);
+
+ reg_write(d->regs, DMA2D_BGCOLR_REG,
+ (frm->a_rgb[2] << 16) |
+ (frm->a_rgb[1] << 8) |
+ frm->a_rgb[0]);
+}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * STM32 DMA2D - 2D Graphics Accelerator Driver
+ *
+ * Copyright (c) 2021 Dillon Min
+ * Dillon Min, <dillon.minfei@gmail.com>
+ *
+ * based on s5p-g2d
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Kamil Debski, <k.debski@samsung.com>
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+
+#include <linux/platform_device.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "dma2d.h"
+#include "dma2d-regs.h"
+
+/*
+ * This V4L2 subdev m2m driver enables Chrom-Art Accelerator unit
+ * of STMicroelectronics STM32 SoC series.
+ *
+ * Currently support r2m, m2m, m2m_pfc.
+ *
+ * - r2m, Filling a part or the whole of a destination image with a specific
+ * color.
+ * - m2m, Copying a part or the whole of a source image into a part or the
+ * whole of a destination.
+ * - m2m_pfc, Copying a part or the whole of a source image into a part or the
+ * whole of a destination image with a pixel format conversion.
+ */
+
+#define fh2ctx(__fh) container_of(__fh, struct dma2d_ctx, fh)
+
+static const struct dma2d_fmt formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_ARGB32,
+ .cmode = DMA2D_CMODE_ARGB8888,
+ .depth = 32,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_RGB24,
+ .cmode = DMA2D_CMODE_RGB888,
+ .depth = 24,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .cmode = DMA2D_CMODE_RGB565,
+ .depth = 16,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_ARGB555,
+ .cmode = DMA2D_CMODE_ARGB1555,
+ .depth = 16,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_ARGB444,
+ .cmode = DMA2D_CMODE_ARGB4444,
+ .depth = 16,
+ },
+};
+
+#define NUM_FORMATS ARRAY_SIZE(formats)
+
+static const struct dma2d_frame def_frame = {
+ .width = DEFAULT_WIDTH,
+ .height = DEFAULT_HEIGHT,
+ .line_offset = 0,
+ .a_rgb = {0x00, 0x00, 0x00, 0xff},
+ .a_mode = DMA2D_ALPHA_MODE_NO_MODIF,
+ .fmt = (struct dma2d_fmt *)&formats[0],
+ .size = DEFAULT_SIZE,
+};
+
+static struct dma2d_fmt *find_fmt(int pixelformat)
+{
+ unsigned int i;
+
+ for (i = 0; i < NUM_FORMATS; i++) {
+ if (formats[i].fourcc == pixelformat)
+ return (struct dma2d_fmt *)&formats[i];
+ }
+
+ return NULL;
+}
+
+static struct dma2d_frame *get_frame(struct dma2d_ctx *ctx,
+ enum v4l2_buf_type type)
+{
+ return V4L2_TYPE_IS_OUTPUT(type) ? &ctx->cap : &ctx->out;
+}
+
+static int dma2d_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], struct device *alloc_devs[])
+{
+ struct dma2d_ctx *ctx = vb2_get_drv_priv(vq);
+ struct dma2d_frame *f = get_frame(ctx, vq->type);
+
+ if (*nplanes)
+ return sizes[0] < f->size ? -EINVAL : 0;
+
+ sizes[0] = f->size;
+ *nplanes = 1;
+
+ return 0;
+}
+
+static int dma2d_buf_out_validate(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ if (vbuf->field == V4L2_FIELD_ANY)
+ vbuf->field = V4L2_FIELD_NONE;
+ if (vbuf->field != V4L2_FIELD_NONE)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int dma2d_buf_prepare(struct vb2_buffer *vb)
+{
+ struct dma2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct dma2d_frame *f = get_frame(ctx, vb->vb2_queue->type);
+
+ if (vb2_plane_size(vb, 0) < f->size)
+ return -EINVAL;
+
+ vb2_set_plane_payload(vb, 0, f->size);
+
+ return 0;
+}
+
+static void dma2d_buf_queue(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct dma2d_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static int dma2d_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ struct dma2d_ctx *ctx = vb2_get_drv_priv(q);
+ struct dma2d_frame *f = get_frame(ctx, q->type);
+
+ f->sequence = 0;
+ return 0;
+}
+
+static void dma2d_stop_streaming(struct vb2_queue *q)
+{
+ struct dma2d_ctx *ctx = vb2_get_drv_priv(q);
+ struct vb2_v4l2_buffer *vbuf;
+
+ for (;;) {
+ if (V4L2_TYPE_IS_OUTPUT(q->type))
+ vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ else
+ vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+ if (!vbuf)
+ return;
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+ }
+}
+
+static const struct vb2_ops dma2d_qops = {
+ .queue_setup = dma2d_queue_setup,
+ .buf_out_validate = dma2d_buf_out_validate,
+ .buf_prepare = dma2d_buf_prepare,
+ .buf_queue = dma2d_buf_queue,
+ .start_streaming = dma2d_start_streaming,
+ .stop_streaming = dma2d_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int queue_init(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct dma2d_ctx *ctx = priv;
+ int ret;
+
+ src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ src_vq->drv_priv = ctx;
+ src_vq->ops = &dma2d_qops;
+ src_vq->mem_ops = &vb2_dma_contig_memops;
+ src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ src_vq->lock = &ctx->dev->mutex;
+ src_vq->dev = ctx->dev->v4l2_dev.dev;
+
+ ret = vb2_queue_init(src_vq);
+ if (ret)
+ return ret;
+
+ dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
+ dst_vq->drv_priv = ctx;
+ dst_vq->ops = &dma2d_qops;
+ dst_vq->mem_ops = &vb2_dma_contig_memops;
+ dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+ dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ dst_vq->lock = &ctx->dev->mutex;
+ dst_vq->dev = ctx->dev->v4l2_dev.dev;
+
+ return vb2_queue_init(dst_vq);
+}
+
+static int dma2d_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct dma2d_frame *frm;
+ struct dma2d_ctx *ctx = container_of(ctrl->handler, struct dma2d_ctx,
+ ctrl_handler);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctx->dev->ctrl_lock, flags);
+ switch (ctrl->id) {
+ case V4L2_CID_COLORFX:
+ if (ctrl->val == V4L2_COLORFX_SET_RGB)
+ ctx->op_mode = DMA2D_MODE_R2M;
+ else if (ctrl->val == V4L2_COLORFX_NONE)
+ ctx->op_mode = DMA2D_MODE_M2M;
+ break;
+ case V4L2_CID_COLORFX_RGB:
+ frm = get_frame(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ frm->a_rgb[2] = (ctrl->val >> 16) & 0xff;
+ frm->a_rgb[1] = (ctrl->val >> 8) & 0xff;
+ frm->a_rgb[0] = (ctrl->val >> 0) & 0xff;
+ break;
+ default:
+ spin_unlock_irqrestore(&ctx->dev->ctrl_lock, flags);
+ return -EINVAL;
+ }
+ spin_unlock_irqrestore(&ctx->dev->ctrl_lock, flags);
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops dma2d_ctrl_ops = {
+ .s_ctrl = dma2d_s_ctrl,
+};
+
+static int dma2d_setup_ctrls(struct dma2d_ctx *ctx)
+{
+ struct v4l2_ctrl_handler *handler = &ctx->ctrl_handler;
+
+ v4l2_ctrl_handler_init(handler, 2);
+
+ v4l2_ctrl_new_std_menu(handler, &dma2d_ctrl_ops, V4L2_CID_COLORFX,
+ V4L2_COLORFX_SET_RGB, ~0x10001,
+ V4L2_COLORFX_NONE);
+
+ v4l2_ctrl_new_std(handler, &dma2d_ctrl_ops, V4L2_CID_COLORFX_RGB, 0,
+ 0xffffff, 1, 0);
+
+ return 0;
+}
+
+static int dma2d_open(struct file *file)
+{
+ struct dma2d_dev *dev = video_drvdata(file);
+ struct dma2d_ctx *ctx = NULL;
+ int ret = 0;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+ ctx->dev = dev;
+ /* Set default formats */
+ ctx->cap = def_frame;
+ ctx->bg = def_frame;
+ ctx->out = def_frame;
+ ctx->op_mode = DMA2D_MODE_M2M_FPC;
+ ctx->colorspace = V4L2_COLORSPACE_REC709;
+ if (mutex_lock_interruptible(&dev->mutex)) {
+ kfree(ctx);
+ return -ERESTARTSYS;
+ }
+
+ ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
+ if (IS_ERR(ctx->fh.m2m_ctx)) {
+ ret = PTR_ERR(ctx->fh.m2m_ctx);
+ mutex_unlock(&dev->mutex);
+ kfree(ctx);
+ return ret;
+ }
+
+ v4l2_fh_init(&ctx->fh, video_devdata(file));
+ file->private_data = &ctx->fh;
+ v4l2_fh_add(&ctx->fh);
+
+ dma2d_setup_ctrls(ctx);
+
+ /* Write the default values to the ctx struct */
+ v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
+
+ ctx->fh.ctrl_handler = &ctx->ctrl_handler;
+ mutex_unlock(&dev->mutex);
+
+ return 0;
+}
+
+static int dma2d_release(struct file *file)
+{
+ struct dma2d_dev *dev = video_drvdata(file);
+ struct dma2d_ctx *ctx = fh2ctx(file->private_data);
+
+ mutex_lock(&dev->mutex);
+ v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+ mutex_unlock(&dev->mutex);
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+ kfree(ctx);
+
+ return 0;
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strscpy(cap->driver, DMA2D_NAME, sizeof(cap->driver));
+ strscpy(cap->card, DMA2D_NAME, sizeof(cap->card));
+ strscpy(cap->bus_info, BUS_INFO, sizeof(cap->bus_info));
+
+ return 0;
+}
+
+static int vidioc_enum_fmt(struct file *file, void *prv, struct v4l2_fmtdesc *f)
+{
+ if (f->index >= NUM_FORMATS)
+ return -EINVAL;
+
+ f->pixelformat = formats[f->index].fourcc;
+ return 0;
+}
+
+static int vidioc_g_fmt(struct file *file, void *prv, struct v4l2_format *f)
+{
+ struct dma2d_ctx *ctx = prv;
+ struct vb2_queue *vq;
+ struct dma2d_frame *frm;
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (!vq)
+ return -EINVAL;
+
+ frm = get_frame(ctx, f->type);
+ f->fmt.pix.width = frm->width;
+ f->fmt.pix.height = frm->height;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.pixelformat = frm->fmt->fourcc;
+ f->fmt.pix.bytesperline = (frm->width * frm->fmt->depth) >> 3;
+ f->fmt.pix.sizeimage = frm->size;
+ f->fmt.pix.colorspace = ctx->colorspace;
+ f->fmt.pix.xfer_func = ctx->xfer_func;
+ f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
+ f->fmt.pix.quantization = ctx->quant;
+
+ return 0;
+}
+
+static int vidioc_try_fmt(struct file *file, void *prv, struct v4l2_format *f)
+{
+ struct dma2d_ctx *ctx = prv;
+ struct dma2d_fmt *fmt;
+ enum v4l2_field *field;
+ u32 fourcc = f->fmt.pix.pixelformat;
+
+ fmt = find_fmt(fourcc);
+ if (!fmt) {
+ f->fmt.pix.pixelformat = formats[0].fourcc;
+ fmt = find_fmt(f->fmt.pix.pixelformat);
+ }
+
+ field = &f->fmt.pix.field;
+ if (*field == V4L2_FIELD_ANY)
+ *field = V4L2_FIELD_NONE;
+ else if (*field != V4L2_FIELD_NONE)
+ return -EINVAL;
+
+ if (f->fmt.pix.width > MAX_WIDTH)
+ f->fmt.pix.width = MAX_WIDTH;
+ if (f->fmt.pix.height > MAX_HEIGHT)
+ f->fmt.pix.height = MAX_HEIGHT;
+
+ if (f->fmt.pix.width < 1)
+ f->fmt.pix.width = 1;
+ if (f->fmt.pix.height < 1)
+ f->fmt.pix.height = 1;
+
+ if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT && !f->fmt.pix.colorspace) {
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
+ } else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ f->fmt.pix.colorspace = ctx->colorspace;
+ f->fmt.pix.xfer_func = ctx->xfer_func;
+ f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
+ f->fmt.pix.quantization = ctx->quant;
+ }
+ f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+
+ return 0;
+}
+
+static int vidioc_s_fmt(struct file *file, void *prv, struct v4l2_format *f)
+{
+ struct dma2d_ctx *ctx = prv;
+ struct vb2_queue *vq;
+ struct dma2d_frame *frm;
+ struct dma2d_fmt *fmt;
+ int ret = 0;
+
+ /* Adjust all values accordingly to the hardware capabilities
+ * and chosen format.
+ */
+ ret = vidioc_try_fmt(file, prv, f);
+ if (ret)
+ return ret;
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (vb2_is_busy(vq))
+ return -EBUSY;
+
+ fmt = find_fmt(f->fmt.pix.pixelformat);
+ if (!fmt)
+ return -EINVAL;
+
+ if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
+ ctx->colorspace = f->fmt.pix.colorspace;
+ ctx->xfer_func = f->fmt.pix.xfer_func;
+ ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
+ ctx->quant = f->fmt.pix.quantization;
+ }
+
+ frm = get_frame(ctx, f->type);
+ frm->width = f->fmt.pix.width;
+ frm->height = f->fmt.pix.height;
+ frm->size = f->fmt.pix.sizeimage;
+ /* Reset crop settings */
+ frm->o_width = 0;
+ frm->o_height = 0;
+ frm->c_width = frm->width;
+ frm->c_height = frm->height;
+ frm->right = frm->width;
+ frm->bottom = frm->height;
+ frm->fmt = fmt;
+ frm->line_offset = 0;
+
+ return 0;
+}
+
+static void device_run(void *prv)
+{
+ struct dma2d_ctx *ctx = prv;
+ struct dma2d_dev *dev = ctx->dev;
+ struct dma2d_frame *frm_out, *frm_cap;
+ struct vb2_v4l2_buffer *src, *dst;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->ctrl_lock, flags);
+ dev->curr = ctx;
+
+ src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+ dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+ if (!dst || !src)
+ goto end;
+
+ frm_cap = get_frame(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
+ frm_out = get_frame(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
+ if (!frm_cap || !frm_out)
+ goto end;
+
+ src->sequence = frm_out->sequence++;
+ dst->sequence = frm_cap->sequence++;
+ v4l2_m2m_buf_copy_metadata(src, dst, true);
+
+ clk_enable(dev->gate);
+
+ dma2d_config_fg(dev, frm_out,
+ vb2_dma_contig_plane_dma_addr(&src->vb2_buf, 0));
+
+ /* TODO: add M2M_BLEND handler here */
+
+ if (ctx->op_mode != DMA2D_MODE_R2M) {
+ if (frm_out->fmt->fourcc == frm_cap->fmt->fourcc)
+ ctx->op_mode = DMA2D_MODE_M2M;
+ else
+ ctx->op_mode = DMA2D_MODE_M2M_FPC;
+ }
+
+ dma2d_config_out(dev, frm_cap,
+ vb2_dma_contig_plane_dma_addr(&dst->vb2_buf, 0));
+ dma2d_config_common(dev, ctx->op_mode, frm_cap->width, frm_cap->height);
+
+ dma2d_start(dev);
+end:
+ spin_unlock_irqrestore(&dev->ctrl_lock, flags);
+}
+
+static irqreturn_t dma2d_isr(int irq, void *prv)
+{
+ struct dma2d_dev *dev = prv;
+ struct dma2d_ctx *ctx = dev->curr;
+ struct vb2_v4l2_buffer *src, *dst;
+ u32 s = dma2d_get_int(dev);
+
+ dma2d_clear_int(dev);
+ if (s & ISR_TCIF || s == 0) {
+ clk_disable(dev->gate);
+
+ WARN_ON(!ctx);
+
+ src = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ dst = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+
+ WARN_ON(!dst);
+ WARN_ON(!src);
+
+ v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
+ v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
+ v4l2_m2m_job_finish(dev->m2m_dev, ctx->fh.m2m_ctx);
+
+ dev->curr = NULL;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static const struct v4l2_file_operations dma2d_fops = {
+ .owner = THIS_MODULE,
+ .open = dma2d_open,
+ .release = dma2d_release,
+ .poll = v4l2_m2m_fop_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = v4l2_m2m_fop_mmap,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = v4l2_m2m_get_unmapped_area,
+#endif
+};
+
+static const struct v4l2_ioctl_ops dma2d_ioctl_ops = {
+ .vidioc_querycap = vidioc_querycap,
+
+ .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
+ .vidioc_g_fmt_vid_cap = vidioc_g_fmt,
+ .vidioc_try_fmt_vid_cap = vidioc_try_fmt,
+ .vidioc_s_fmt_vid_cap = vidioc_s_fmt,
+
+ .vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
+ .vidioc_g_fmt_vid_out = vidioc_g_fmt,
+ .vidioc_try_fmt_vid_out = vidioc_try_fmt,
+ .vidioc_s_fmt_vid_out = vidioc_s_fmt,
+
+ .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
+ .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
+ .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
+ .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
+ .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
+ .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
+ .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
+
+ .vidioc_streamon = v4l2_m2m_ioctl_streamon,
+ .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
+
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static const struct video_device dma2d_videodev = {
+ .name = DMA2D_NAME,
+ .fops = &dma2d_fops,
+ .ioctl_ops = &dma2d_ioctl_ops,
+ .minor = -1,
+ .release = video_device_release,
+ .vfl_dir = VFL_DIR_M2M,
+};
+
+static const struct v4l2_m2m_ops dma2d_m2m_ops = {
+ .device_run = device_run,
+};
+
+static const struct of_device_id stm32_dma2d_match[];
+
+static int dma2d_probe(struct platform_device *pdev)
+{
+ struct dma2d_dev *dev;
+ struct video_device *vfd;
+ struct resource *res;
+ int ret = 0;
+
+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ spin_lock_init(&dev->ctrl_lock);
+ mutex_init(&dev->mutex);
+ atomic_set(&dev->num_inst, 0);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ dev->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(dev->regs))
+ return PTR_ERR(dev->regs);
+
+ dev->gate = clk_get(&pdev->dev, "dma2d");
+ if (IS_ERR(dev->gate)) {
+ dev_err(&pdev->dev, "failed to get dma2d clock gate\n");
+ ret = -ENXIO;
+ return ret;
+ }
+
+ ret = clk_prepare(dev->gate);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to prepare dma2d clock gate\n");
+ goto put_clk_gate;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to find IRQ\n");
+ ret = -ENXIO;
+ goto unprep_clk_gate;
+ }
+
+ dev->irq = res->start;
+
+ ret = devm_request_irq(&pdev->dev, dev->irq, dma2d_isr,
+ 0, pdev->name, dev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to install IRQ\n");
+ goto unprep_clk_gate;
+ }
+
+ ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
+ if (ret)
+ goto unprep_clk_gate;
+
+ vfd = video_device_alloc();
+ if (!vfd) {
+ v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
+ ret = -ENOMEM;
+ goto unreg_v4l2_dev;
+ }
+
+ *vfd = dma2d_videodev;
+ vfd->lock = &dev->mutex;
+ vfd->v4l2_dev = &dev->v4l2_dev;
+ vfd->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
+
+ platform_set_drvdata(pdev, dev);
+ dev->m2m_dev = v4l2_m2m_init(&dma2d_m2m_ops);
+ if (IS_ERR(dev->m2m_dev)) {
+ v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
+ ret = PTR_ERR(dev->m2m_dev);
+ goto rel_vdev;
+ }
+
+ ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
+ if (ret) {
+ v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+ goto free_m2m;
+ }
+
+ video_set_drvdata(vfd, dev);
+ dev->vfd = vfd;
+ v4l2_info(&dev->v4l2_dev, "device registered as /dev/video%d\n",
+ vfd->num);
+ return 0;
+
+free_m2m:
+ v4l2_m2m_release(dev->m2m_dev);
+rel_vdev:
+ video_device_release(vfd);
+unreg_v4l2_dev:
+ v4l2_device_unregister(&dev->v4l2_dev);
+unprep_clk_gate:
+ clk_unprepare(dev->gate);
+put_clk_gate:
+ clk_put(dev->gate);
+
+ return ret;
+}
+
+static int dma2d_remove(struct platform_device *pdev)
+{
+ struct dma2d_dev *dev = platform_get_drvdata(pdev);
+
+ v4l2_info(&dev->v4l2_dev, "Removing " DMA2D_NAME);
+ v4l2_m2m_release(dev->m2m_dev);
+ video_unregister_device(dev->vfd);
+ v4l2_device_unregister(&dev->v4l2_dev);
+ vb2_dma_contig_clear_max_seg_size(&pdev->dev);
+ clk_unprepare(dev->gate);
+ clk_put(dev->gate);
+
+ return 0;
+}
+
+static const struct of_device_id stm32_dma2d_match[] = {
+ {
+ .compatible = "st,stm32-dma2d",
+ .data = NULL,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, stm32_dma2d_match);
+
+static struct platform_driver dma2d_pdrv = {
+ .probe = dma2d_probe,
+ .remove = dma2d_remove,
+ .driver = {
+ .name = DMA2D_NAME,
+ .of_match_table = stm32_dma2d_match,
+ },
+};
+
+module_platform_driver(dma2d_pdrv);
+
+MODULE_AUTHOR("Dillon Min <dillon.minfei@gmail.com>");
+MODULE_DESCRIPTION("STM32 Chrom-Art Accelerator DMA2D driver");
+MODULE_LICENSE("GPL");
projects / linux.git / commitdiff