Hi Shaik, A few more remarks...
On 07/05/2012 12:27 PM, Shaik Ameer Basha wrote: > diff --git a/drivers/media/video/exynos/gsc/gsc-core.c > b/drivers/media/video/exynos/gsc/gsc-core.c > new file mode 100644 > index 0000000..06bd24f > --- /dev/null > +++ b/drivers/media/video/exynos/gsc/gsc-core.c > @@ -0,0 +1,1304 @@ > +/* linux/drivers/media/video/exynos/gsc/gsc-core.c > + * > + * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * Samsung EXYNOS5 SoC series G-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/kernel.h> > +#include<linux/version.h> > +#include<linux/types.h> > +#include<linux/errno.h> > +#include<linux/bug.h> > +#include<linux/interrupt.h> > +#include<linux/workqueue.h> > +#include<linux/device.h> > +#include<linux/platform_device.h> > +#include<linux/list.h> > +#include<linux/io.h> > +#include<linux/slab.h> > +#include<linux/clk.h> > +#include<media/v4l2-ioctl.h> > +#include<linux/of.h> > +#include "gsc-core.h" > + > +#define GSC_CLOCK_GATE_NAME "gscl" > + > +int gsc_dbg; > +module_param(gsc_dbg, int, 0644); > + > + > +static struct gsc_fmt gsc_formats[] = { static const > + { > + .name = "RGB565", > + .pixelformat = V4L2_PIX_FMT_RGB565X, > + .depth = { 16 }, > + .color = GSC_RGB, > + .num_planes = 1, > + .num_comp = 1, > + }, { ... > +struct gsc_fmt *find_fmt(u32 *pixelformat, u32 *mbus_code, int index) > +{ > + struct gsc_fmt *fmt, *def_fmt = NULL; > + unsigned int i; > + > + if (index>= ARRAY_SIZE(gsc_formats)) if (index >= (int)ARRAY_SIZE(gsc_formats)) (otherwise negative indexes won't work) > + return NULL; > + > + for (i = 0; i< ARRAY_SIZE(gsc_formats); ++i) { > + fmt = get_format(i); > + if (pixelformat&& fmt->pixelformat == *pixelformat) > + return fmt; > + if (mbus_code&& fmt->mbus_code == *mbus_code) > + return fmt; > + if (index == i) > + def_fmt = fmt; > + } > + return def_fmt; > + > +} ... > +int gsc_enum_fmt_mplane(struct v4l2_fmtdesc *f) > +{ > + struct gsc_fmt *fmt; > + > + fmt = find_fmt(NULL, NULL, f->index); > + if (!fmt) > + return -EINVAL; > + > + strncpy(f->description, fmt->name, sizeof(f->description) - 1); strlcpy(f->description, fmt->name, sizeof(f->description)); > + f->pixelformat = fmt->pixelformat; > + > + return 0; > +} > + > +u32 get_plane_size(struct gsc_frame *frame, unsigned int plane) > +{ > + if (!frame || plane>= frame->fmt->num_planes) { > + gsc_err("Invalid argument"); > + return 0; > + } > + > + return frame->payload[plane]; > +} > + > +u32 get_plane_info(struct gsc_frame frm, u32 addr, u32 *index) Why don't you just pass a pointer to struct gsc_frame ? It is so inefficient this way... > +{ > + if (frm.addr.y == addr) { > + *index = 0; > + return frm.addr.y; > + } else if (frm.addr.cb == addr) { > + *index = 1; > + return frm.addr.cb; > + } else if (frm.addr.cr == addr) { > + *index = 2; > + return frm.addr.cr; > + } else { > + gsc_err("Plane address is wrong"); > + return -EINVAL; > + } > +} > + > +void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame frm) Ditto. > +{ > + u32 f_chk_addr, f_chk_len, s_chk_addr, s_chk_len; > + f_chk_addr = f_chk_len = s_chk_addr = s_chk_len = 0; > + > + f_chk_addr = frm.addr.y; > + f_chk_len = frm.payload[0]; > + if (frm.fmt->num_planes == 2) { > + s_chk_addr = frm.addr.cb; > + s_chk_len = frm.payload[1]; > + } else if (frm.fmt->num_planes == 3) { > + u32 low_addr, low_plane, mid_addr, mid_plane; > + u32 high_addr, high_plane; > + u32 t_min, t_max; > + > + t_min = min3(frm.addr.y, frm.addr.cb, frm.addr.cr); > + low_addr = get_plane_info(frm, t_min,&low_plane); > + t_max = max3(frm.addr.y, frm.addr.cb, frm.addr.cr); > + high_addr = get_plane_info(frm, t_max,&high_plane); > + > + mid_plane = 3 - (low_plane + high_plane); > + if (mid_plane == 0) > + mid_addr = frm.addr.y; > + else if (mid_plane == 1) > + mid_addr = frm.addr.cb; > + else if (mid_plane == 2) > + mid_addr = frm.addr.cr; > + else > + return; > + > + f_chk_addr = low_addr; > + if (mid_addr + frm.payload[mid_plane] - low_addr> > + high_addr + frm.payload[high_plane] - mid_addr) { > + f_chk_len = frm.payload[low_plane]; > + s_chk_addr = mid_addr; > + s_chk_len = high_addr + > + frm.payload[high_plane] - mid_addr; > + } else { > + f_chk_len = mid_addr + > + frm.payload[mid_plane] - low_addr; > + s_chk_addr = high_addr; > + s_chk_len = frm.payload[high_plane]; > + } > + } > + gsc_dbg("f_addr = 0x%08x, f_len = %d, s_addr = 0x%08x, s_len = %d\n", > + f_chk_addr, f_chk_len, s_chk_addr, s_chk_len); > +} > + ... > +static int gsc_m2m_querycap(struct file *file, void *fh, > + struct v4l2_capability *cap) > +{ > + struct gsc_ctx *ctx = fh_to_ctx(fh); > + struct gsc_dev *gsc = ctx->gsc_dev; > + > + strncpy(cap->driver, gsc->pdev->name, sizeof(cap->driver) - 1); strlcpy(cap->driver, gsc->pdev->name, sizeof(cap->driver)); > + strncpy(cap->card, gsc->pdev->name, sizeof(cap->card) - 1); strlcpy(cap->card, gsc->pdev->name, sizeof(cap->card)); > + cap->bus_info[0] = 0; strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info)); > + cap->capabilities = V4L2_CAP_STREAMING | > + V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE; Need to set device_caps as well: cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE; cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; Howewer this will probably need to be cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE; as per http://www.mail-archive.com/linux-media@vger.kernel.org/msg48498.html by the time this patch is to be merged (v3.7 ?). > + > + return 0; > +} > + [...] > +static int gsc_m2m_g_selection(struct file *file, void *fh, > + struct v4l2_selection *s) > +{ > + struct gsc_frame *frame; > + struct gsc_ctx *ctx = fh_to_ctx(fh); > + > + if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)&& > + (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) > + return -EINVAL; > + > + frame = ctx_get_frame(ctx, s->type); > + if (IS_ERR(frame)) > + return PTR_ERR(frame); > + > + switch (s->target) { > + case V4L2_SEL_TGT_COMPOSE_DEFAULT: > + case V4L2_SEL_TGT_COMPOSE_BOUNDS: > + case V4L2_SEL_TGT_CROP_BOUNDS: > + case V4L2_SEL_TGT_CROP_DEFAULT: > + s->r.left = 0; > + s->r.top = 0; > + s->r.width = frame->f_width; > + s->r.height = frame->f_height; > + return 0; > + > + case V4L2_SEL_TGT_COMPOSE_ACTIVE: > + case V4L2_SEL_TGT_CROP_ACTIVE: Please use V4L2_SEL_TGT_CROP/COMPOSE instead of V4L2_SEL_TGT_CROP/COMPOSE_ACTIVE which is being phased out. http://git.linuxtv.org/media_tree.git/commit/c133482300113b3b71fa4a1fd2118531e765b36a > + s->r.left = frame->crop.left; > + s->r.top = frame->crop.top; > + s->r.width = frame->crop.width; > + s->r.height = frame->crop.height; > + return 0; > + } > + > + return -EINVAL; > +} > + > +static int gsc_m2m_s_selection(struct file *file, void *fh, > + struct v4l2_selection *s) > +{ > + struct gsc_frame *frame; > + struct gsc_ctx *ctx = fh_to_ctx(fh); > + struct v4l2_crop cr; > + struct gsc_variant *variant = ctx->gsc_dev->variant; > + int ret; > + > + cr.type = s->type; > + cr.c = s->r; > + > + if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)&& > + (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) > + return -EINVAL; > + > + ret = gsc_try_crop(ctx,&cr); > + if (ret) > + return ret; > + > + if (s->flags& V4L2_SEL_FLAG_LE&& > + !is_rectangle_enclosed(&cr.c,&s->r)) > + return -ERANGE; > + > + if (s->flags& V4L2_SEL_FLAG_GE&& > + !is_rectangle_enclosed(&s->r,&cr.c)) > + return -ERANGE; > + > + s->r = cr.c; > + > + switch (s->target) { > + case V4L2_SEL_TGT_COMPOSE_BOUNDS: > + case V4L2_SEL_TGT_COMPOSE_DEFAULT: > + case V4L2_SEL_TGT_COMPOSE_ACTIVE: V4L2_SEL_TGT_COMPOSE_ACTIVE -> V4L2_SEL_TGT_COMPOSE > + frame =&ctx->s_frame; > + break; > + > + case V4L2_SEL_TGT_CROP_BOUNDS: > + case V4L2_SEL_TGT_CROP_ACTIVE: V4L2_SEL_TGT_CROP_ACTIVE -> V4L2_SEL_TGT_CROP > + case V4L2_SEL_TGT_CROP_DEFAULT: > + frame =&ctx->d_frame; > + break; > + > + default: > + return -EINVAL; > + } > + > + /* Check to see if scaling ratio is within supported range */ > + if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) { > + if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { > + ret = gsc_check_scaler_ratio(variant, cr.c.width, > + cr.c.height, ctx->d_frame.crop.width, > + ctx->d_frame.crop.height, > + ctx->gsc_ctrls.rotate->val, ctx->out_path); > + } else { > + ret = gsc_check_scaler_ratio(variant, > + ctx->s_frame.crop.width, > + ctx->s_frame.crop.height, cr.c.width, > + cr.c.height, ctx->gsc_ctrls.rotate->val, > + ctx->out_path); > + } > + > + if (ret) { > + gsc_err("Out of scaler range"); > + return -EINVAL; > + } > + } > + > + frame->crop = cr.c; > + > + gsc_ctx_state_lock_set(GSC_PARAMS, ctx); > + return 0; > +} [...] > +static int gsc_m2m_open(struct file *file) > +{ > + struct gsc_dev *gsc = video_drvdata(file); > + struct gsc_ctx *ctx = NULL; > + int ret; > + > + gsc_dbg("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state); > + > + ctx = kzalloc(sizeof *ctx, GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + v4l2_fh_init(&ctx->fh, gsc->m2m.vfd); > + ret = gsc_ctrls_create(ctx); > + if (ret) > + goto error_fh; > + > + /* Use separate control handler per file handle */ > + ctx->fh.ctrl_handler =&ctx->ctrl_handler; > + file->private_data =&ctx->fh; > + v4l2_fh_add(&ctx->fh); > + > + ctx->gsc_dev = gsc; > + /* Default color format */ > + ctx->s_frame.fmt = get_format(0); > + ctx->d_frame.fmt = get_format(0); > + /* Setup the device context for mem2mem mode. */ > + ctx->state |= GSC_CTX_M2M; > + ctx->flags = 0; > + ctx->in_path = GSC_DMA; > + ctx->out_path = GSC_DMA; > + spin_lock_init(&ctx->slock); > + > + ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init); > + if (IS_ERR(ctx->m2m_ctx)) { > + gsc_err("Failed to initialize m2m context"); > + ret = PTR_ERR(ctx->m2m_ctx); > + goto error_fh; > + } > + > + if (gsc->m2m.refcnt++ == 0) > + set_bit(ST_M2M_OPEN,&gsc->state); > + > + gsc_dbg("gsc m2m driver is opened, ctx(0x%p)", ctx); > + return 0; > + > +error_fh: > + v4l2_fh_del(&ctx->fh); > + v4l2_fh_exit(&ctx->fh); > + kfree(ctx); > + return ret; > +} > + > +static int gsc_m2m_release(struct file *file) > +{ > + struct gsc_ctx *ctx = fh_to_ctx(file->private_data); > + struct gsc_dev *gsc = ctx->gsc_dev; > + > + gsc_dbg("pid: %d, state: 0x%lx, refcnt= %d", > + task_pid_nr(current), gsc->state, gsc->m2m.refcnt); > + > + v4l2_m2m_ctx_release(ctx->m2m_ctx); > + gsc_ctrls_delete(ctx); > + v4l2_fh_del(&ctx->fh); > + v4l2_fh_exit(&ctx->fh); > + > + if (--gsc->m2m.refcnt<= 0) > + clear_bit(ST_M2M_OPEN,&gsc->state); > + kfree(ctx); > + return 0; > +} > + > +static unsigned int gsc_m2m_poll(struct file *file, > + struct poll_table_struct *wait) > +{ > + struct gsc_ctx *ctx = fh_to_ctx(file->private_data); > + > + return v4l2_m2m_poll(file, ctx->m2m_ctx, wait); > +} > + > +static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma) > +{ > + struct gsc_ctx *ctx = fh_to_ctx(file->private_data); > + > + return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); > +} > +static const struct v4l2_file_operations gsc_m2m_fops = { > + .owner = THIS_MODULE, > + .open = gsc_m2m_open, > + .release = gsc_m2m_release, > + .poll = gsc_m2m_poll, > + .unlocked_ioctl = video_ioctl2, > + .mmap = gsc_m2m_mmap, There was a change recently in the v4l2 core modules and only .unlocked_ioctl is serialized with the core video device mutex. All other file operations must be serialized explicitly in drivers. For more details see: http://git.infradead.org/users/kmpark/linux-samsung/commit/66ba3641dbc122c9c82f03aed9320f087730dd8f [...] > diff --git a/drivers/media/video/exynos/gsc/gsc-regs.c > b/drivers/media/video/exynos/gsc/gsc-regs.c > new file mode 100644 > index 0000000..7c5cce2 > --- /dev/null > +++ b/drivers/media/video/exynos/gsc/gsc-regs.c > @@ -0,0 +1,579 @@ > +/* linux/drivers/media/video/exynos/gsc/gsc-regs.c > + * > + * Copyright (c) 2011 Samsung Electronics Co., Ltd. > + * http://www.samsung.com > + * > + * Samsung EXYNOS5 SoC series G-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/io.h> > +#include<linux/delay.h> > +#include<mach/map.h> > +#include "gsc-core.h" > + > +void gsc_hw_set_sw_reset(struct gsc_dev *dev) > +{ > + u32 cfg = 0; > + > + cfg |= GSC_SW_RESET_SRESET; > + writel(cfg, dev->regs + GSC_SW_RESET); > +} Probably worth to make it an inline function and move it to some header, e.g. +static inline void gsc_hw_set_sw_reset(struct gsc_dev *dev) +{ + writel(GSC_SW_RESET_SRESET, dev->regs + GSC_SW_RESET); +} -- Thanks, Sylwester -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
