On 08/19/2013 02:58 PM, Hans Verkuil wrote: > On 08/19/2013 12:58 PM, Shaik Ameer Basha wrote: >> This patch adds the memory to memory (m2m) interface functionality >> for the M-Scaler driver. > > Just one small comment below... > >> >> Signed-off-by: Shaik Ameer Basha <shaik.ameer@xxxxxxxxxxx> >> --- >> drivers/media/platform/exynos-mscl/mscl-m2m.c | 763 +++++++++++++++++++++++++ >> 1 file changed, 763 insertions(+) >> create mode 100644 drivers/media/platform/exynos-mscl/mscl-m2m.c >> >> diff --git a/drivers/media/platform/exynos-mscl/mscl-m2m.c b/drivers/media/platform/exynos-mscl/mscl-m2m.c >> new file mode 100644 >> index 0000000..fecbb57 >> --- /dev/null >> +++ b/drivers/media/platform/exynos-mscl/mscl-m2m.c >> @@ -0,0 +1,763 @@ >> +/* >> + * Copyright (c) 2013 - 2014 Samsung Electronics Co., Ltd. >> + * http://www.samsung.com >> + * >> + * Samsung EXYNOS5 SoC series M-Scaler driver >> + * >> + * 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/module.h> >> +#include <linux/pm_runtime.h> >> +#include <linux/slab.h> >> + >> +#include <media/v4l2-ioctl.h> >> + >> +#include "mscl-core.h" >> + >> +static int mscl_m2m_ctx_stop_req(struct mscl_ctx *ctx) >> +{ >> + struct mscl_ctx *curr_ctx; >> + struct mscl_dev *mscl = ctx->mscl_dev; >> + int ret; >> + >> + curr_ctx = v4l2_m2m_get_curr_priv(mscl->m2m.m2m_dev); >> + if (!mscl_m2m_pending(mscl) || (curr_ctx != ctx)) >> + return 0; >> + >> + mscl_ctx_state_lock_set(MSCL_CTX_STOP_REQ, ctx); >> + ret = wait_event_timeout(mscl->irq_queue, >> + !mscl_ctx_state_is_set(MSCL_CTX_STOP_REQ, ctx), >> + MSCL_SHUTDOWN_TIMEOUT); >> + >> + return ret == 0 ? -ETIMEDOUT : ret; >> +} >> + >> +static int mscl_m2m_start_streaming(struct vb2_queue *q, unsigned int count) >> +{ >> + struct mscl_ctx *ctx = q->drv_priv; >> + int ret; >> + >> + ret = pm_runtime_get_sync(&ctx->mscl_dev->pdev->dev); >> + >> + return ret > 0 ? 0 : ret; >> +} >> + >> +static int mscl_m2m_stop_streaming(struct vb2_queue *q) >> +{ >> + struct mscl_ctx *ctx = q->drv_priv; >> + int ret; >> + >> + ret = mscl_m2m_ctx_stop_req(ctx); >> + if (ret == -ETIMEDOUT) >> + mscl_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); >> + >> + pm_runtime_put(&ctx->mscl_dev->pdev->dev); >> + >> + return 0; >> +} >> + >> +void mscl_m2m_job_finish(struct mscl_ctx *ctx, int vb_state) >> +{ >> + struct vb2_buffer *src_vb, *dst_vb; >> + >> + if (!ctx || !ctx->m2m_ctx) >> + return; >> + >> + src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx); >> + dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx); >> + >> + if (src_vb && dst_vb) { >> + v4l2_m2m_buf_done(src_vb, vb_state); >> + v4l2_m2m_buf_done(dst_vb, vb_state); >> + >> + v4l2_m2m_job_finish(ctx->mscl_dev->m2m.m2m_dev, >> + ctx->m2m_ctx); >> + } >> +} >> + >> + >> +static void mscl_m2m_job_abort(void *priv) >> +{ >> + struct mscl_ctx *ctx = priv; >> + int ret; >> + >> + ret = mscl_m2m_ctx_stop_req(ctx); >> + if (ret == -ETIMEDOUT) >> + mscl_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); >> +} >> + >> +static int mscl_get_bufs(struct mscl_ctx *ctx) >> +{ >> + struct mscl_frame *s_frame, *d_frame; >> + struct vb2_buffer *src_vb, *dst_vb; >> + int ret; >> + >> + s_frame = &ctx->s_frame; >> + d_frame = &ctx->d_frame; >> + >> + src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx); >> + ret = mscl_prepare_addr(ctx, src_vb, s_frame, &s_frame->addr); >> + if (ret) >> + return ret; >> + >> + dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); >> + ret = mscl_prepare_addr(ctx, dst_vb, d_frame, &d_frame->addr); >> + if (ret) >> + return ret; >> + >> + dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp; >> + >> + return 0; >> +} >> + >> +static void mscl_m2m_device_run(void *priv) >> +{ >> + struct mscl_ctx *ctx = priv; >> + struct mscl_dev *mscl; >> + unsigned long flags; >> + int ret; >> + bool is_set = false; >> + >> + if (WARN(!ctx, "null hardware context\n")) >> + return; >> + >> + mscl = ctx->mscl_dev; >> + spin_lock_irqsave(&mscl->slock, flags); >> + >> + set_bit(ST_M2M_PEND, &mscl->state); >> + >> + /* Reconfigure hardware if the context has changed. */ >> + if (mscl->m2m.ctx != ctx) { >> + dev_dbg(&mscl->pdev->dev, >> + "mscl->m2m.ctx = 0x%p, current_ctx = 0x%p", >> + mscl->m2m.ctx, ctx); >> + ctx->state |= MSCL_PARAMS; >> + mscl->m2m.ctx = ctx; >> + } >> + >> + is_set = (ctx->state & MSCL_CTX_STOP_REQ) ? 1 : 0; >> + ctx->state &= ~MSCL_CTX_STOP_REQ; >> + if (is_set) { >> + wake_up(&mscl->irq_queue); >> + goto put_device; >> + } >> + >> + ret = mscl_get_bufs(ctx); >> + if (ret) { >> + dev_dbg(&mscl->pdev->dev, "Wrong address"); >> + goto put_device; >> + } >> + >> + mscl_hw_address_queue_reset(ctx); >> + mscl_set_prefbuf(mscl, &ctx->s_frame); >> + mscl_hw_set_input_addr(mscl, &ctx->s_frame.addr); >> + mscl_hw_set_output_addr(mscl, &ctx->d_frame.addr); >> + mscl_hw_set_csc_coeff(ctx); >> + >> + if (ctx->state & MSCL_PARAMS) { >> + mscl_hw_set_irq_mask(mscl, MSCL_INT_FRAME_END, false); >> + if (mscl_set_scaler_info(ctx)) { >> + dev_dbg(&mscl->pdev->dev, "Scaler setup error"); >> + goto put_device; >> + } >> + >> + mscl_hw_set_in_size(ctx); >> + mscl_hw_set_in_image_format(ctx); >> + >> + mscl_hw_set_out_size(ctx); >> + mscl_hw_set_out_image_format(ctx); >> + >> + mscl_hw_set_scaler_ratio(ctx); >> + mscl_hw_set_rotation(ctx); >> + } >> + >> + ctx->state &= ~MSCL_PARAMS; >> + mscl_hw_enable_control(mscl, true); >> + >> + spin_unlock_irqrestore(&mscl->slock, flags); >> + return; >> + >> +put_device: >> + ctx->state &= ~MSCL_PARAMS; >> + spin_unlock_irqrestore(&mscl->slock, flags); >> +} >> + >> +static int mscl_m2m_queue_setup(struct vb2_queue *vq, >> + const struct v4l2_format *fmt, >> + unsigned int *num_buffers, unsigned int *num_planes, >> + unsigned int sizes[], void *allocators[]) >> +{ >> + struct mscl_ctx *ctx = vb2_get_drv_priv(vq); >> + struct mscl_frame *frame; >> + int i; >> + >> + frame = ctx_get_frame(ctx, vq->type); >> + if (IS_ERR(frame)) >> + return PTR_ERR(frame); >> + >> + if (!frame->fmt) >> + return -EINVAL; >> + >> + *num_planes = frame->fmt->num_planes; >> + for (i = 0; i < frame->fmt->num_planes; i++) { >> + sizes[i] = frame->payload[i]; >> + allocators[i] = ctx->mscl_dev->alloc_ctx; >> + } >> + return 0; >> +} >> + >> +static int mscl_m2m_buf_prepare(struct vb2_buffer *vb) >> +{ >> + struct mscl_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); >> + struct mscl_frame *frame; >> + int i; >> + >> + frame = ctx_get_frame(ctx, vb->vb2_queue->type); >> + if (IS_ERR(frame)) >> + return PTR_ERR(frame); >> + >> + if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) { >> + for (i = 0; i < frame->fmt->num_planes; i++) >> + vb2_set_plane_payload(vb, i, frame->payload[i]); >> + } >> + >> + return 0; >> +} >> + >> +static void mscl_m2m_buf_queue(struct vb2_buffer *vb) >> +{ >> + struct mscl_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); >> + >> + dev_dbg(&ctx->mscl_dev->pdev->dev, >> + "ctx: %p, ctx->state: 0x%x", ctx, ctx->state); >> + >> + if (ctx->m2m_ctx) >> + v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); >> +} >> + >> +static struct vb2_ops mscl_m2m_qops = { >> + .queue_setup = mscl_m2m_queue_setup, >> + .buf_prepare = mscl_m2m_buf_prepare, >> + .buf_queue = mscl_m2m_buf_queue, >> + .wait_prepare = mscl_unlock, >> + .wait_finish = mscl_lock, >> + .stop_streaming = mscl_m2m_stop_streaming, >> + .start_streaming = mscl_m2m_start_streaming, >> +}; >> + >> +static int mscl_m2m_querycap(struct file *file, void *fh, >> + struct v4l2_capability *cap) >> +{ >> + struct mscl_ctx *ctx = fh_to_ctx(fh); >> + struct mscl_dev *mscl = ctx->mscl_dev; >> + >> + strlcpy(cap->driver, mscl->pdev->name, sizeof(cap->driver)); >> + strlcpy(cap->card, mscl->pdev->name, sizeof(cap->card)); >> + strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info)); I forgot to mention that the bus_info should be renamed as well to something like: "platform:exynos-mscl". Regards, Hans >> + cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE | >> + V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE; > > No V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE, it should just be > V4L2_CAP_VIDEO_M2M_MPLANE. > >> + >> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; >> + >> + return 0; >> +} >> + > > Regards, > > Hans > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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