* [PATCH v5 3/5] media: gscaler: Add core functionality for the G-Scaler driver
2012-07-31 13:44 [PATCH v5 0/5] Add new driver for generic scaler Shaik Ameer Basha
2012-07-31 13:44 ` [PATCH v5 1/5] v4l: Add new YVU420 multi planar fourcc definition Shaik Ameer Basha
2012-07-31 13:44 ` [PATCH v5 2/5] media: gscaler: Add new driver for generic scaler Shaik Ameer Basha
@ 2012-07-31 13:44 ` Shaik Ameer Basha
2012-07-31 13:44 ` [PATCH v5 4/5] media: gscaler: Add m2m " Shaik Ameer Basha
` (3 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: Shaik Ameer Basha @ 2012-07-31 13:44 UTC (permalink / raw)
To: linux-media
Cc: sungchun.kang, khw0178.kim, mchehab, laurent.pinchart,
sy0816.kang, s.nawrocki, posciak, hverkuil, alim.akhtar,
prashanth.g, joshi, shaik.samsung, shaik.ameer
From: Sungchun Kang <sungchun.kang@samsung.com>
This patch adds the core functionality for the G-Scaler driver.
Signed-off-by: Hynwoong Kim <khw0178.kim@samsung.com>
Signed-off-by: Sungchun Kang <sungchun.kang@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
drivers/media/video/exynos-gsc/gsc-core.c | 1254 +++++++++++++++++++++++++++++
drivers/media/video/exynos-gsc/gsc-core.h | 532 ++++++++++++
2 files changed, 1786 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/exynos-gsc/gsc-core.c
create mode 100644 drivers/media/video/exynos-gsc/gsc-core.h
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..d6f0b63
--- /dev/null
+++ b/drivers/media/video/exynos-gsc/gsc-core.c
@@ -0,0 +1,1254 @@
+/*
+ * 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 <linux/of.h>
+#include <media/v4l2-ioctl.h>
+
+#include "gsc-core.h"
+
+#define GSC_CLOCK_GATE_NAME "gscl"
+
+static const struct gsc_fmt gsc_formats[] = {
+ {
+ .name = "RGB565",
+ .pixelformat = V4L2_PIX_FMT_RGB565X,
+ .depth = { 16 },
+ .color = GSC_RGB,
+ .num_planes = 1,
+ .num_comp = 1,
+ }, {
+ .name = "XRGB-8-8-8-8, 32 bpp",
+ .pixelformat = V4L2_PIX_FMT_RGB32,
+ .depth = { 32 },
+ .color = GSC_RGB,
+ .num_planes = 1,
+ .num_comp = 1,
+ }, {
+ .name = "YUV 4:2:2 packed, YCbYCr",
+ .pixelformat = V4L2_PIX_FMT_YUYV,
+ .depth = { 16 },
+ .color = GSC_YUV422,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 1,
+ .num_comp = 1,
+ .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8,
+ }, {
+ .name = "YUV 4:2:2 packed, CbYCrY",
+ .pixelformat = V4L2_PIX_FMT_UYVY,
+ .depth = { 16 },
+ .color = GSC_YUV422,
+ .yorder = GSC_LSB_C,
+ .corder = GSC_CBCR,
+ .num_planes = 1,
+ .num_comp = 1,
+ .mbus_code = V4L2_MBUS_FMT_UYVY8_2X8,
+ }, {
+ .name = "YUV 4:2:2 packed, CrYCbY",
+ .pixelformat = V4L2_PIX_FMT_VYUY,
+ .depth = { 16 },
+ .color = GSC_YUV422,
+ .yorder = GSC_LSB_C,
+ .corder = GSC_CRCB,
+ .num_planes = 1,
+ .num_comp = 1,
+ .mbus_code = V4L2_MBUS_FMT_VYUY8_2X8,
+ }, {
+ .name = "YUV 4:2:2 packed, YCrYCb",
+ .pixelformat = V4L2_PIX_FMT_YVYU,
+ .depth = { 16 },
+ .color = GSC_YUV422,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CRCB,
+ .num_planes = 1,
+ .num_comp = 1,
+ .mbus_code = V4L2_MBUS_FMT_YVYU8_2X8,
+ }, {
+ .name = "YUV 4:4:4 planar, YCbYCr",
+ .pixelformat = V4L2_PIX_FMT_YUV32,
+ .depth = { 32 },
+ .color = GSC_YUV444,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 1,
+ .num_comp = 1,
+ }, {
+ .name = "YUV 4:2:2 planar, Y/Cb/Cr",
+ .pixelformat = V4L2_PIX_FMT_YUV422P,
+ .depth = { 16 },
+ .color = GSC_YUV422,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 1,
+ .num_comp = 3,
+ }, {
+ .name = "YUV 4:2:2 planar, Y/CbCr",
+ .pixelformat = V4L2_PIX_FMT_NV16,
+ .depth = { 16 },
+ .color = GSC_YUV422,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 1,
+ .num_comp = 2,
+ }, {
+ .name = "YUV 4:2:2 planar, Y/CrCb",
+ .pixelformat = V4L2_PIX_FMT_NV61,
+ .depth = { 16 },
+ .color = GSC_YUV422,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CRCB,
+ .num_planes = 1,
+ .num_comp = 2,
+ }, {
+ .name = "YUV 4:2:0 planar, YCbCr",
+ .pixelformat = V4L2_PIX_FMT_YUV420,
+ .depth = { 12 },
+ .color = GSC_YUV420,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 1,
+ .num_comp = 3,
+ }, {
+ .name = "YUV 4:2:0 planar, YCrCb",
+ .pixelformat = V4L2_PIX_FMT_YVU420,
+ .depth = { 12 },
+ .color = GSC_YUV420,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CRCB,
+ .num_planes = 1,
+ .num_comp = 3,
+
+ }, {
+ .name = "YUV 4:2:0 planar, Y/CbCr",
+ .pixelformat = V4L2_PIX_FMT_NV12,
+ .depth = { 12 },
+ .color = GSC_YUV420,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 1,
+ .num_comp = 2,
+ }, {
+ .name = "YUV 4:2:0 planar, Y/CrCb",
+ .pixelformat = V4L2_PIX_FMT_NV21,
+ .depth = { 12 },
+ .color = GSC_YUV420,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CRCB,
+ .num_planes = 1,
+ .num_comp = 2,
+ }, {
+ .name = "YUV 4:2:0 non-contig. 2p, Y/CbCr",
+ .pixelformat = V4L2_PIX_FMT_NV12M,
+ .depth = { 8, 4 },
+ .color = GSC_YUV420,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 2,
+ .num_comp = 2,
+ }, {
+ .name = "YUV 4:2:0 non-contig. 3p, Y/Cb/Cr",
+ .pixelformat = V4L2_PIX_FMT_YUV420M,
+ .depth = { 8, 2, 2 },
+ .color = GSC_YUV420,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CBCR,
+ .num_planes = 3,
+ .num_comp = 3,
+ }, {
+ .name = "YUV 4:2:0 non-contig. 3p, Y/Cr/Cb",
+ .pixelformat = V4L2_PIX_FMT_YVU420M,
+ .depth = { 8, 2, 2 },
+ .color = GSC_YUV420,
+ .yorder = GSC_LSB_Y,
+ .corder = GSC_CRCB,
+ .num_planes = 3,
+ .num_comp = 3,
+ }
+};
+
+const struct gsc_fmt *get_format(int index)
+{
+ if (index >= ARRAY_SIZE(gsc_formats))
+ return NULL;
+
+ return (struct gsc_fmt *)&gsc_formats[index];
+}
+
+const struct gsc_fmt *find_fmt(u32 *pixelformat, u32 *mbus_code, u32 index)
+{
+ const struct gsc_fmt *fmt, *def_fmt = NULL;
+ unsigned int i;
+
+ if (index >= ARRAY_SIZE(gsc_formats))
+ 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;
+
+}
+
+void gsc_set_frame_size(struct gsc_frame *frame, int width, int height)
+{
+ frame->f_width = width;
+ frame->f_height = height;
+ frame->crop.width = width;
+ frame->crop.height = height;
+ frame->crop.left = 0;
+ frame->crop.top = 0;
+}
+
+int gsc_cal_prescaler_ratio(struct gsc_variant *var, u32 src, u32 dst,
+ u32 *ratio)
+{
+ if ((dst > src) || (dst >= src / var->poly_sc_down_max)) {
+ *ratio = 1;
+ return 0;
+ }
+
+ if ((src / var->poly_sc_down_max / var->pre_sc_down_max) > dst) {
+ pr_err("Exceeded maximum downscaling ratio (1/16))");
+ return -EINVAL;
+ }
+
+ *ratio = (dst > (src / 8)) ? 2 : 4;
+
+ return 0;
+}
+
+void gsc_get_prescaler_shfactor(u32 hratio, u32 vratio, u32 *sh)
+{
+ if (hratio == 4 && vratio == 4)
+ *sh = 4;
+ else if ((hratio == 4 && vratio == 2) ||
+ (hratio == 2 && vratio == 4))
+ *sh = 3;
+ else if ((hratio == 4 && vratio == 1) ||
+ (hratio == 1 && vratio == 4) ||
+ (hratio == 2 && vratio == 2))
+ *sh = 2;
+ else if (hratio == 1 && vratio == 1)
+ *sh = 0;
+ else
+ *sh = 1;
+}
+
+void gsc_check_src_scale_info(struct gsc_variant *var,
+ struct gsc_frame *s_frame, u32 *wratio,
+ u32 tx, u32 ty, u32 *hratio)
+{
+ int remainder = 0, walign, halign;
+
+ if (is_yuv420(s_frame->fmt->color)) {
+ walign = GSC_SC_ALIGN_4;
+ halign = GSC_SC_ALIGN_4;
+ } else if (is_yuv422(s_frame->fmt->color)) {
+ walign = GSC_SC_ALIGN_4;
+ halign = GSC_SC_ALIGN_2;
+ } else {
+ walign = GSC_SC_ALIGN_2;
+ halign = GSC_SC_ALIGN_2;
+ }
+
+ remainder = s_frame->crop.width % (*wratio * walign);
+ if (remainder) {
+ s_frame->crop.width -= remainder;
+ gsc_cal_prescaler_ratio(var, s_frame->crop.width, tx, wratio);
+ pr_info("cropped src width size is recalculated from %d to %d",
+ s_frame->crop.width + remainder, s_frame->crop.width);
+ }
+
+ remainder = s_frame->crop.height % (*hratio * halign);
+ if (remainder) {
+ s_frame->crop.height -= remainder;
+ gsc_cal_prescaler_ratio(var, s_frame->crop.height, ty, hratio);
+ pr_info("cropped src height size is recalculated from %d to %d",
+ s_frame->crop.height + remainder, s_frame->crop.height);
+ }
+}
+
+int gsc_enum_fmt_mplane(struct v4l2_fmtdesc *f)
+{
+ const struct gsc_fmt *fmt;
+
+ fmt = find_fmt(NULL, NULL, f->index);
+ if (!fmt)
+ return -EINVAL;
+
+ strlcpy(f->description, fmt->name, sizeof(f->description));
+ f->pixelformat = fmt->pixelformat;
+
+ return 0;
+}
+
+u32 get_plane_info(struct gsc_frame *frm, u32 addr, u32 *index)
+{
+ 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 {
+ pr_err("Plane address is wrong");
+ return -EINVAL;
+ }
+}
+
+void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm)
+{
+ 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];
+ }
+ }
+ pr_debug("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);
+}
+
+int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
+{
+ struct gsc_dev *gsc = ctx->gsc_dev;
+ struct gsc_variant *variant = gsc->variant;
+ struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+ const struct gsc_fmt *fmt;
+ u32 max_w, max_h, mod_x, mod_y;
+ u32 min_w, min_h, tmp_w, tmp_h;
+ int i;
+
+ pr_debug("user put w: %d, h: %d", pix_mp->width, pix_mp->height);
+
+ fmt = find_fmt(&pix_mp->pixelformat, NULL, 0);
+ if (!fmt) {
+ pr_err("pixelformat format (0x%X) invalid\n",
+ pix_mp->pixelformat);
+ return -EINVAL;
+ }
+
+ if (pix_mp->field == V4L2_FIELD_ANY)
+ pix_mp->field = V4L2_FIELD_NONE;
+ else if (pix_mp->field != V4L2_FIELD_NONE) {
+ pr_err("Not supported field order(%d)\n", pix_mp->field);
+ return -EINVAL;
+ }
+
+ max_w = variant->pix_max->target_rot_dis_w;
+ max_h = variant->pix_max->target_rot_dis_h;
+
+ mod_x = ffs(variant->pix_align->org_w) - 1;
+ if (is_yuv420(fmt->color))
+ mod_y = ffs(variant->pix_align->org_h) - 1;
+ else
+ mod_y = ffs(variant->pix_align->org_h) - 2;
+
+ if (V4L2_TYPE_IS_OUTPUT(f->type)) {
+ min_w = variant->pix_min->org_w;
+ min_h = variant->pix_min->org_h;
+ } else {
+ min_w = variant->pix_min->target_rot_dis_w;
+ min_h = variant->pix_min->target_rot_dis_h;
+ }
+
+ pr_debug("mod_x: %d, mod_y: %d, max_w: %d, max_h = %d",
+ mod_x, mod_y, max_w, max_h);
+
+ /* To check if image size is modified to adjust parameter against
+ hardware abilities */
+ tmp_w = pix_mp->width;
+ tmp_h = pix_mp->height;
+
+ v4l_bound_align_image(&pix_mp->width, min_w, max_w, mod_x,
+ &pix_mp->height, min_h, max_h, mod_y, 0);
+ if (tmp_w != pix_mp->width || tmp_h != pix_mp->height)
+ pr_info("Image size has been modified from %dx%d to %dx%d",
+ tmp_w, tmp_h, pix_mp->width, pix_mp->height);
+
+ pix_mp->num_planes = fmt->num_planes;
+
+ if (pix_mp->width >= 1280) /* HD */
+ pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+ else /* SD */
+ pix_mp->colorspace = V4L2_COLORSPACE_SMPTE170M;
+
+
+ for (i = 0; i < pix_mp->num_planes; ++i) {
+ int bpl = (pix_mp->width * fmt->depth[i]) >> 3;
+ pix_mp->plane_fmt[i].bytesperline = bpl;
+ pix_mp->plane_fmt[i].sizeimage = bpl * pix_mp->height;
+
+ pr_debug("[%d]: bpl: %d, sizeimage: %d",
+ i, bpl, pix_mp->plane_fmt[i].sizeimage);
+ }
+
+ return 0;
+}
+
+int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f)
+{
+ struct gsc_frame *frame;
+ struct v4l2_pix_format_mplane *pix_mp;
+ int i;
+
+ frame = ctx_get_frame(ctx, f->type);
+ if (IS_ERR(frame))
+ return PTR_ERR(frame);
+
+ pix_mp = &f->fmt.pix_mp;
+
+ pix_mp->width = frame->f_width;
+ pix_mp->height = frame->f_height;
+ pix_mp->field = V4L2_FIELD_NONE;
+ pix_mp->pixelformat = frame->fmt->pixelformat;
+ pix_mp->colorspace = V4L2_COLORSPACE_REC709;
+ pix_mp->num_planes = frame->fmt->num_planes;
+
+ for (i = 0; i < pix_mp->num_planes; ++i) {
+ pix_mp->plane_fmt[i].bytesperline = (frame->f_width *
+ frame->fmt->depth[i]) / 8;
+ pix_mp->plane_fmt[i].sizeimage =
+ pix_mp->plane_fmt[i].bytesperline * frame->f_height;
+ }
+
+ return 0;
+}
+
+void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h)
+{
+ if (tmp_w != *w || tmp_h != *h) {
+ pr_info("Cropped size has been modified from %dx%d to %dx%d",
+ *w, *h, tmp_w, tmp_h);
+ *w = tmp_w;
+ *h = tmp_h;
+ }
+}
+
+int gsc_g_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
+{
+ struct gsc_frame *frame;
+
+ frame = ctx_get_frame(ctx, cr->type);
+ if (IS_ERR(frame))
+ return PTR_ERR(frame);
+
+ cr->c = frame->crop;
+
+ return 0;
+}
+
+int gsc_try_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr)
+{
+ struct gsc_frame *f;
+ struct gsc_dev *gsc = ctx->gsc_dev;
+ struct gsc_variant *variant = gsc->variant;
+ u32 mod_x = 0, mod_y = 0, tmp_w, tmp_h;
+ u32 min_w, min_h, max_w, max_h;
+
+ if (cr->c.top < 0 || cr->c.left < 0) {
+ pr_err("doesn't support negative values for top & left\n");
+ return -EINVAL;
+ }
+ pr_debug("user put w: %d, h: %d", cr->c.width, cr->c.height);
+
+ if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ f = &ctx->d_frame;
+ else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ f = &ctx->s_frame;
+ else
+ return -EINVAL;
+
+ max_w = f->f_width;
+ max_h = f->f_height;
+ tmp_w = cr->c.width;
+ tmp_h = cr->c.height;
+
+ if (V4L2_TYPE_IS_OUTPUT(cr->type)) {
+ if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 1) ||
+ is_rgb(f->fmt->color))
+ min_w = 32;
+ else
+ min_w = 64;
+ if ((is_yuv422(f->fmt->color) && f->fmt->num_comp == 3) ||
+ is_yuv420(f->fmt->color))
+ min_h = 32;
+ else
+ min_h = 16;
+ } else {
+ if (is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color))
+ mod_x = ffs(variant->pix_align->target_w) - 1;
+ if (is_yuv420(f->fmt->color))
+ mod_y = ffs(variant->pix_align->target_h) - 1;
+ if (ctx->gsc_ctrls.rotate->val == 90 ||
+ ctx->gsc_ctrls.rotate->val == 270) {
+ max_w = f->f_height;
+ max_h = f->f_width;
+ min_w = variant->pix_min->target_rot_en_w;
+ min_h = variant->pix_min->target_rot_en_h;
+ tmp_w = cr->c.height;
+ tmp_h = cr->c.width;
+ } else {
+ min_w = variant->pix_min->target_rot_dis_w;
+ min_h = variant->pix_min->target_rot_dis_h;
+ }
+ }
+ pr_debug("mod_x: %d, mod_y: %d, min_w: %d, min_h = %d",
+ mod_x, mod_y, min_w, min_h);
+ pr_debug("tmp_w : %d, tmp_h : %d", tmp_w, tmp_h);
+
+ v4l_bound_align_image(&tmp_w, min_w, max_w, mod_x,
+ &tmp_h, min_h, max_h, mod_y, 0);
+
+ if (!V4L2_TYPE_IS_OUTPUT(cr->type) &&
+ (ctx->gsc_ctrls.rotate->val == 90 ||
+ ctx->gsc_ctrls.rotate->val == 270))
+ gsc_check_crop_change(tmp_h, tmp_w,
+ &cr->c.width, &cr->c.height);
+ else
+ gsc_check_crop_change(tmp_w, tmp_h,
+ &cr->c.width, &cr->c.height);
+
+
+ /* adjust left/top if cropping rectangle is out of bounds */
+ /* Need to add code to algin left value with 2's multiple */
+ if (cr->c.left + tmp_w > max_w)
+ cr->c.left = max_w - tmp_w;
+ if (cr->c.top + tmp_h > max_h)
+ cr->c.top = max_h - tmp_h;
+
+ if ((is_yuv420(f->fmt->color) || is_yuv422(f->fmt->color)) &&
+ cr->c.left & 1)
+ cr->c.left -= 1;
+
+ pr_debug("Aligned l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
+ cr->c.left, cr->c.top, cr->c.width, cr->c.height, max_w, max_h);
+
+ return 0;
+}
+
+int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
+ int dh, int rot, int out_path)
+{
+ int tmp_w, tmp_h, sc_down_max;
+
+ if (out_path == GSC_DMA)
+ sc_down_max = var->sc_down_max;
+ else
+ sc_down_max = var->local_sc_down;
+
+ if (rot == 90 || rot == 270) {
+ tmp_w = dh;
+ tmp_h = dw;
+ } else {
+ tmp_w = dw;
+ tmp_h = dh;
+ }
+
+ if ((sw / tmp_w) > sc_down_max ||
+ (sh / tmp_h) > sc_down_max ||
+ (tmp_w / sw) > var->sc_up_max ||
+ (tmp_h / sh) > var->sc_up_max)
+ return -EINVAL;
+
+ return 0;
+}
+
+int gsc_set_scaler_info(struct gsc_ctx *ctx)
+{
+ struct gsc_scaler *sc = &ctx->scaler;
+ struct gsc_frame *s_frame = &ctx->s_frame;
+ struct gsc_frame *d_frame = &ctx->d_frame;
+ struct gsc_variant *variant = ctx->gsc_dev->variant;
+ struct device *dev = &ctx->gsc_dev->pdev->dev;
+ int tx, ty;
+ int ret;
+
+ ret = gsc_check_scaler_ratio(variant, s_frame->crop.width,
+ s_frame->crop.height, d_frame->crop.width, d_frame->crop.height,
+ ctx->gsc_ctrls.rotate->val, ctx->out_path);
+ if (ret) {
+ pr_err("out of scaler range");
+ return ret;
+ }
+
+ if (ctx->gsc_ctrls.rotate->val == 90 ||
+ ctx->gsc_ctrls.rotate->val == 270) {
+ ty = d_frame->crop.width;
+ tx = d_frame->crop.height;
+ } else {
+ tx = d_frame->crop.width;
+ ty = d_frame->crop.height;
+ }
+
+ if (tx <= 0 || ty <= 0) {
+ dev_err(dev, "Invalid target size: %dx%d", tx, ty);
+ return -EINVAL;
+ }
+
+ ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.width,
+ tx, &sc->pre_hratio);
+ if (ret) {
+ pr_err("Horizontal scale ratio is out of range");
+ return ret;
+ }
+
+ ret = gsc_cal_prescaler_ratio(variant, s_frame->crop.height,
+ ty, &sc->pre_vratio);
+ if (ret) {
+ pr_err("Vertical scale ratio is out of range");
+ return ret;
+ }
+
+ gsc_check_src_scale_info(variant, s_frame, &sc->pre_hratio,
+ tx, ty, &sc->pre_vratio);
+
+ gsc_get_prescaler_shfactor(sc->pre_hratio, sc->pre_vratio,
+ &sc->pre_shfactor);
+
+ sc->main_hratio = (s_frame->crop.width << 16) / tx;
+ sc->main_vratio = (s_frame->crop.height << 16) / ty;
+
+ pr_debug("scaler input/output size : sx = %d, sy = %d, tx = %d, ty = %d",
+ s_frame->crop.width, s_frame->crop.height, tx, ty);
+ pr_debug("scaler ratio info : pre_shfactor : %d, pre_h : %d",
+ sc->pre_shfactor, sc->pre_hratio);
+ pr_debug("pre_v :%d, main_h : %d, main_v : %d",
+ sc->pre_vratio, sc->main_hratio, sc->main_vratio);
+
+ return 0;
+}
+
+static int __gsc_s_ctrl(struct gsc_ctx *ctx, struct v4l2_ctrl *ctrl)
+{
+ struct gsc_dev *gsc = ctx->gsc_dev;
+ struct gsc_variant *variant = gsc->variant;
+ unsigned int flags = GSC_DST_FMT | GSC_SRC_FMT;
+ int ret = 0;
+
+ if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ ctx->hflip = ctrl->val;
+ break;
+
+ case V4L2_CID_VFLIP:
+ ctx->vflip = ctrl->val;
+ break;
+
+ case V4L2_CID_ROTATE:
+ if ((ctx->state & flags) == flags) {
+ ret = gsc_check_scaler_ratio(variant,
+ ctx->s_frame.crop.width,
+ ctx->s_frame.crop.height,
+ ctx->d_frame.crop.width,
+ ctx->d_frame.crop.height,
+ ctx->gsc_ctrls.rotate->val,
+ ctx->out_path);
+
+ if (ret)
+ return -EINVAL;
+ }
+
+ ctx->rotation = ctrl->val;
+ break;
+
+ case V4L2_CID_ALPHA_COMPONENT:
+ ctx->d_frame.alpha = ctrl->val;
+ break;
+ }
+
+ ctx->state |= GSC_PARAMS;
+ return 0;
+}
+
+static int gsc_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct gsc_ctx *ctx = ctrl_to_ctx(ctrl);
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
+ ret = __gsc_s_ctrl(ctx, ctrl);
+ spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
+
+ return ret;
+}
+
+const struct v4l2_ctrl_ops gsc_ctrl_ops = {
+ .s_ctrl = gsc_s_ctrl,
+};
+
+int gsc_ctrls_create(struct gsc_ctx *ctx)
+{
+ if (ctx->ctrls_rdy) {
+ pr_err("Control handler of this context was created already");
+ return 0;
+ }
+
+ v4l2_ctrl_handler_init(&ctx->ctrl_handler, GSC_MAX_CTRL_NUM);
+
+ ctx->gsc_ctrls.rotate = v4l2_ctrl_new_std(&ctx->ctrl_handler,
+ &gsc_ctrl_ops, V4L2_CID_ROTATE, 0, 270, 90, 0);
+ ctx->gsc_ctrls.hflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
+ &gsc_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
+ ctx->gsc_ctrls.vflip = v4l2_ctrl_new_std(&ctx->ctrl_handler,
+ &gsc_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
+ ctx->gsc_ctrls.global_alpha = v4l2_ctrl_new_std(&ctx->ctrl_handler,
+ &gsc_ctrl_ops, V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
+
+ ctx->ctrls_rdy = ctx->ctrl_handler.error == 0;
+
+ if (ctx->ctrl_handler.error) {
+ int err = ctx->ctrl_handler.error;
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+ pr_err("Failed to create G-Scaler control handlers");
+ return err;
+ }
+
+ return 0;
+}
+
+void gsc_ctrls_delete(struct gsc_ctx *ctx)
+{
+ if (ctx->ctrls_rdy) {
+ v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+ ctx->ctrls_rdy = false;
+ }
+}
+
+/* The color format (num_comp, num_planes) must be already configured. */
+int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
+ struct gsc_frame *frame, struct gsc_addr *addr)
+{
+ int ret = 0;
+ u32 pix_size;
+
+ if ((vb == NULL) || (frame == NULL))
+ return -EINVAL;
+
+ pix_size = frame->f_width * frame->f_height;
+
+ pr_debug("num_planes= %d, num_comp= %d, pix_size= %d",
+ frame->fmt->num_planes, frame->fmt->num_comp, pix_size);
+
+ addr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+ if (frame->fmt->num_planes == 1) {
+ switch (frame->fmt->num_comp) {
+ case 1:
+ addr->cb = 0;
+ addr->cr = 0;
+ break;
+ case 2:
+ /* decompose Y into Y/Cb */
+ addr->cb = (dma_addr_t)(addr->y + pix_size);
+ addr->cr = 0;
+ break;
+ case 3:
+ /* decompose Y into Y/Cb/Cr */
+ addr->cb = (dma_addr_t)(addr->y + pix_size);
+ if (GSC_YUV420 == frame->fmt->color)
+ addr->cr = (dma_addr_t)(addr->cb
+ + (pix_size >> 2));
+ else /* 422 */
+ addr->cr = (dma_addr_t)(addr->cb
+ + (pix_size >> 1));
+ break;
+ default:
+ pr_err("Invalid the number of color planes");
+ return -EINVAL;
+ }
+ } else {
+ if (frame->fmt->num_planes >= 2)
+ addr->cb = vb2_dma_contig_plane_dma_addr(vb, 1);
+
+ if (frame->fmt->num_planes == 3)
+ addr->cr = vb2_dma_contig_plane_dma_addr(vb, 2);
+ }
+
+ if ((frame->fmt->pixelformat == V4L2_PIX_FMT_VYUY) ||
+ (frame->fmt->pixelformat == V4L2_PIX_FMT_YVYU) ||
+ (frame->fmt->pixelformat == V4L2_PIX_FMT_NV61) ||
+ (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420) ||
+ (frame->fmt->pixelformat == V4L2_PIX_FMT_NV21) ||
+ (frame->fmt->pixelformat == V4L2_PIX_FMT_YVU420M))
+ swap(addr->cb, addr->cr);
+
+ pr_debug("ADDR: y= 0x%X cb= 0x%X cr= 0x%X ret= %d",
+ addr->y, addr->cb, addr->cr, ret);
+
+ return ret;
+}
+
+static irqreturn_t gsc_irq_handler(int irq, void *priv)
+{
+ struct gsc_dev *gsc = priv;
+ struct gsc_ctx *ctx;
+ int gsc_irq;
+
+ gsc_irq = gsc_hw_get_irq_status(gsc);
+ gsc_hw_clear_irq(gsc, gsc_irq);
+
+ if (gsc_irq == GSC_IRQ_OVERRUN) {
+ pr_err("Local path input over-run interrupt has occurred!\n");
+ return IRQ_HANDLED;
+ }
+
+ spin_lock(&gsc->slock);
+
+ if (test_and_clear_bit(ST_M2M_PEND, &gsc->state)) {
+
+ gsc_hw_enable_control(gsc, false);
+
+ if (test_and_clear_bit(ST_M2M_SUSPENDING, &gsc->state)) {
+ set_bit(ST_M2M_SUSPENDED, &gsc->state);
+ wake_up(&gsc->irq_queue);
+ goto isr_unlock;
+ }
+ ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
+
+ if (!ctx || !ctx->m2m_ctx)
+ goto isr_unlock;
+
+ spin_unlock(&gsc->slock);
+ gsc_m2m_job_finish(ctx, VB2_BUF_STATE_DONE);
+
+ /* wake_up job_abort, stop_streaming */
+ if (ctx->state & GSC_CTX_STOP_REQ) {
+ ctx->state &= ~GSC_CTX_STOP_REQ;
+ wake_up(&gsc->irq_queue);
+ }
+ return IRQ_HANDLED;
+ }
+
+isr_unlock:
+ spin_unlock(&gsc->slock);
+ return IRQ_HANDLED;
+}
+
+static struct gsc_pix_max gsc_v_100_max = {
+ .org_scaler_bypass_w = 8192,
+ .org_scaler_bypass_h = 8192,
+ .org_scaler_input_w = 4800,
+ .org_scaler_input_h = 3344,
+ .real_rot_dis_w = 4800,
+ .real_rot_dis_h = 3344,
+ .real_rot_en_w = 2047,
+ .real_rot_en_h = 2047,
+ .target_rot_dis_w = 4800,
+ .target_rot_dis_h = 3344,
+ .target_rot_en_w = 2016,
+ .target_rot_en_h = 2016,
+};
+
+static struct gsc_pix_min gsc_v_100_min = {
+ .org_w = 64,
+ .org_h = 32,
+ .real_w = 64,
+ .real_h = 32,
+ .target_rot_dis_w = 64,
+ .target_rot_dis_h = 32,
+ .target_rot_en_w = 32,
+ .target_rot_en_h = 16,
+};
+
+static struct gsc_pix_align gsc_v_100_align = {
+ .org_h = 16,
+ .org_w = 16, /* yuv420 : 16, others : 8 */
+ .offset_h = 2, /* yuv420/422 : 2, others : 1 */
+ .real_w = 16, /* yuv420/422 : 4~16, others : 2~8 */
+ .real_h = 16, /* yuv420 : 4~16, others : 1 */
+ .target_w = 2, /* yuv420/422 : 2, others : 1 */
+ .target_h = 2, /* yuv420 : 2, others : 1 */
+};
+
+static struct gsc_variant gsc_v_100_variant = {
+ .pix_max = &gsc_v_100_max,
+ .pix_min = &gsc_v_100_min,
+ .pix_align = &gsc_v_100_align,
+ .in_buf_cnt = 8,
+ .out_buf_cnt = 16,
+ .sc_up_max = 8,
+ .sc_down_max = 16,
+ .poly_sc_down_max = 4,
+ .pre_sc_down_max = 4,
+ .local_sc_down = 2,
+};
+
+static struct gsc_driverdata gsc_v_100_drvdata = {
+ .variant = {
+ [0] = &gsc_v_100_variant,
+ [1] = &gsc_v_100_variant,
+ [2] = &gsc_v_100_variant,
+ [3] = &gsc_v_100_variant,
+ },
+ .num_entities = 4,
+ .lclk_frequency = 266000000UL,
+};
+
+static struct platform_device_id gsc_driver_ids[] = {
+ {
+ .name = "exynos-gsc",
+ .driver_data = (unsigned long)&gsc_v_100_drvdata,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, gsc_driver_ids);
+
+static const struct of_device_id exynos_gsc_match[] = {
+ { .compatible = "samsung,exynos5250-gsc",
+ .data = &gsc_v_100_drvdata, },
+ {},
+};
+MODULE_DEVICE_TABLE(of, exynos_gsc_match);
+
+static void *gsc_get_drv_data(struct platform_device *pdev)
+{
+ struct gsc_driverdata *driver_data = NULL;
+
+ if (pdev->dev.of_node) {
+ const struct of_device_id *match;
+ match = of_match_node(of_match_ptr(exynos_gsc_match),
+ pdev->dev.of_node);
+ if (match)
+ driver_data = match->data;
+ } else {
+ driver_data = (struct gsc_driverdata *)
+ platform_get_device_id(pdev)->driver_data;
+ }
+
+ return driver_data;
+}
+
+static void gsc_clk_put(struct gsc_dev *gsc)
+{
+ if (IS_ERR_OR_NULL(gsc->clock))
+ return;
+
+ clk_unprepare(gsc->clock);
+ clk_put(gsc->clock);
+ gsc->clock = NULL;
+}
+
+static int gsc_clk_get(struct gsc_dev *gsc)
+{
+ int ret;
+
+ dev_dbg(&gsc->pdev->dev, "gsc_clk_get Called\n");
+
+ gsc->clock = clk_get(&gsc->pdev->dev, GSC_CLOCK_GATE_NAME);
+ if (IS_ERR(gsc->clock))
+ goto err_print;
+
+ ret = clk_prepare(gsc->clock);
+ if (ret < 0) {
+ clk_put(gsc->clock);
+ gsc->clock = NULL;
+ goto err;
+ }
+
+ return 0;
+
+err:
+ dev_err(&gsc->pdev->dev, "clock prepare failed for clock: %s\n",
+ GSC_CLOCK_GATE_NAME);
+ gsc_clk_put(gsc);
+err_print:
+ dev_err(&gsc->pdev->dev, "failed to get clock~~~: %s\n",
+ GSC_CLOCK_GATE_NAME);
+ return -ENXIO;
+}
+
+static int gsc_m2m_suspend(struct gsc_dev *gsc)
+{
+ unsigned long flags;
+ int timeout;
+
+ spin_lock_irqsave(&gsc->slock, flags);
+ if (!gsc_m2m_pending(gsc)) {
+ spin_unlock_irqrestore(&gsc->slock, flags);
+ return 0;
+ }
+ clear_bit(ST_M2M_SUSPENDED, &gsc->state);
+ set_bit(ST_M2M_SUSPENDING, &gsc->state);
+ spin_unlock_irqrestore(&gsc->slock, flags);
+
+ timeout = wait_event_timeout(gsc->irq_queue,
+ test_bit(ST_M2M_SUSPENDED, &gsc->state),
+ GSC_SHUTDOWN_TIMEOUT);
+
+ clear_bit(ST_M2M_SUSPENDING, &gsc->state);
+ return timeout == 0 ? -EAGAIN : 0;
+}
+
+static int gsc_m2m_resume(struct gsc_dev *gsc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&gsc->slock, flags);
+ /* Clear for full H/W setup in first run after resume */
+ gsc->m2m.ctx = NULL;
+ spin_unlock_irqrestore(&gsc->slock, flags);
+
+ if (test_and_clear_bit(ST_M2M_SUSPENDED, &gsc->state))
+ gsc_m2m_job_finish(gsc->m2m.ctx,
+ VB2_BUF_STATE_ERROR);
+ return 0;
+}
+
+static int gsc_probe(struct platform_device *pdev)
+{
+ struct gsc_dev *gsc;
+ struct resource *res;
+ struct gsc_driverdata *drv_data = gsc_get_drv_data(pdev);
+ struct device *dev = &pdev->dev;
+ int ret = 0;
+
+ gsc = devm_kzalloc(dev, sizeof(struct gsc_dev), GFP_KERNEL);
+ if (!gsc)
+ return -ENOMEM;
+
+ if (dev->of_node)
+ gsc->id = of_alias_get_id(pdev->dev.of_node, "gsc");
+ else
+ gsc->id = pdev->id;
+
+ if (gsc->id < 0 || gsc->id >= drv_data->num_entities) {
+ dev_err(dev, "Invalid platform device id: %d\n", gsc->id);
+ return -EINVAL;
+ }
+
+ pdev->id = gsc->id;
+ gsc->variant = drv_data->variant[gsc->id];
+ gsc->pdev = pdev;
+ gsc->pdata = dev->platform_data;
+
+ init_waitqueue_head(&gsc->irq_queue);
+ spin_lock_init(&gsc->slock);
+ mutex_init(&gsc->lock);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ gsc->regs = devm_request_and_ioremap(dev, res);
+ if (!gsc->regs) {
+ dev_err(dev, "failed to map registers\n");
+ return -ENOENT;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res) {
+ dev_err(dev, "failed to get IRQ resource\n");
+ return -ENXIO;
+ }
+
+ ret = gsc_clk_get(gsc);
+ if (ret)
+ return ret;
+
+ ret = devm_request_irq(dev, res->start, gsc_irq_handler,
+ 0, pdev->name, gsc);
+ if (ret) {
+ dev_err(dev, "failed to install irq (%d)\n", ret);
+ goto err_clk;
+ }
+
+ ret = gsc_register_m2m_device(gsc);
+ if (ret)
+ goto err_clk;
+
+ platform_set_drvdata(pdev, gsc);
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0)
+ goto err_m2m;
+
+ /* Initialize continious memory allocator */
+ gsc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
+ if (IS_ERR(gsc->alloc_ctx)) {
+ ret = PTR_ERR(gsc->alloc_ctx);
+ goto err_pm;
+ }
+
+ dev_dbg(dev, "gsc-%d registered successfully\n", gsc->id);
+
+ pm_runtime_put(dev);
+ return 0;
+err_pm:
+ pm_runtime_put(dev);
+err_m2m:
+ gsc_unregister_m2m_device(gsc);
+err_clk:
+ gsc_clk_put(gsc);
+ return ret;
+}
+
+static int __devexit gsc_remove(struct platform_device *pdev)
+{
+ struct gsc_dev *gsc = platform_get_drvdata(pdev);
+
+ gsc_unregister_m2m_device(gsc);
+
+ vb2_dma_contig_cleanup_ctx(gsc->alloc_ctx);
+ pm_runtime_disable(&pdev->dev);
+
+ dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
+ return 0;
+}
+
+static int gsc_runtime_resume(struct device *dev)
+{
+ struct gsc_dev *gsc = dev_get_drvdata(dev);
+ int ret = 0;
+
+ pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
+
+ ret = clk_enable(gsc->clock);
+ if (ret)
+ return ret;
+
+ gsc_hw_set_sw_reset(gsc);
+ gsc_wait_reset(gsc);
+
+ return gsc_m2m_resume(gsc);
+}
+
+static int gsc_runtime_suspend(struct device *dev)
+{
+ struct gsc_dev *gsc = dev_get_drvdata(dev);
+ int ret = 0;
+
+ ret = gsc_m2m_suspend(gsc);
+ if (!ret)
+ clk_disable(gsc->clock);
+
+ pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
+ return ret;
+}
+
+static int gsc_resume(struct device *dev)
+{
+ struct gsc_dev *gsc = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
+
+ /* Do not resume if the device was idle before system suspend */
+ spin_lock_irqsave(&gsc->slock, flags);
+ if (!test_and_clear_bit(ST_SUSPEND, &gsc->state) ||
+ !gsc_m2m_active(gsc)) {
+ spin_unlock_irqrestore(&gsc->slock, flags);
+ return 0;
+ }
+ gsc_hw_set_sw_reset(gsc);
+ gsc_wait_reset(gsc);
+
+ spin_unlock_irqrestore(&gsc->slock, flags);
+
+ return gsc_m2m_resume(gsc);
+}
+
+static int gsc_suspend(struct device *dev)
+{
+ struct gsc_dev *gsc = dev_get_drvdata(dev);
+
+ pr_debug("gsc%d: state: 0x%lx", gsc->id, gsc->state);
+
+ if (test_and_set_bit(ST_SUSPEND, &gsc->state))
+ return 0;
+
+ return gsc_m2m_suspend(gsc);
+}
+
+static const struct dev_pm_ops gsc_pm_ops = {
+ .suspend = gsc_suspend,
+ .resume = gsc_resume,
+ .runtime_suspend = gsc_runtime_suspend,
+ .runtime_resume = gsc_runtime_resume,
+};
+
+static struct platform_driver gsc_driver = {
+ .probe = gsc_probe,
+ .remove = __devexit_p(gsc_remove),
+ .id_table = gsc_driver_ids,
+ .driver = {
+ .name = GSC_MODULE_NAME,
+ .owner = THIS_MODULE,
+ .pm = &gsc_pm_ops,
+ .of_match_table = exynos_gsc_match,
+ }
+};
+
+module_platform_driver(gsc_driver);
+
+MODULE_AUTHOR("Hyunwong Kim <khw0178.kim@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Samsung EXYNOS5 Soc series G-Scaler driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/video/exynos-gsc/gsc-core.h b/drivers/media/video/exynos-gsc/gsc-core.h
new file mode 100644
index 0000000..7ee7f85
--- /dev/null
+++ b/drivers/media/video/exynos-gsc/gsc-core.h
@@ -0,0 +1,532 @@
+/*
+ * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * header file for 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 version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef GSC_CORE_H_
+#define GSC_CORE_H_
+
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <media/videobuf2-core.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-mem2mem.h>
+#include <media/v4l2-mediabus.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "gsc-regs.h"
+
+#define CONFIG_VB2_GSC_DMA_CONTIG 1
+#define GSC_MODULE_NAME "exynos-gsc"
+
+#define GSC_SHUTDOWN_TIMEOUT ((100*HZ)/1000)
+#define GSC_MAX_DEVS 4
+#define GSC_M2M_BUF_NUM 0
+#define GSC_MAX_CTRL_NUM 10
+#define GSC_SC_ALIGN_4 4
+#define GSC_SC_ALIGN_2 2
+#define DEFAULT_CSC_EQ 1
+#define DEFAULT_CSC_RANGE 1
+
+#define GSC_PARAMS (1 << 0)
+#define GSC_SRC_FMT (1 << 1)
+#define GSC_DST_FMT (1 << 2)
+#define GSC_CTX_M2M (1 << 3)
+#define GSC_CTX_STOP_REQ (1 << 6)
+
+enum gsc_dev_flags {
+ /* for global */
+ ST_SUSPEND,
+
+ /* for m2m node */
+ ST_M2M_OPEN,
+ ST_M2M_RUN,
+ ST_M2M_PEND,
+ ST_M2M_SUSPENDED,
+ ST_M2M_SUSPENDING,
+};
+
+enum gsc_irq {
+ GSC_IRQ_DONE,
+ GSC_IRQ_OVERRUN
+};
+
+/**
+ * enum gsc_datapath - the path of data used for G-Scaler
+ * @GSC_CAMERA: from camera
+ * @GSC_DMA: from/to DMA
+ * @GSC_LOCAL: to local path
+ * @GSC_WRITEBACK: from FIMD
+ */
+enum gsc_datapath {
+ GSC_CAMERA = 0x1,
+ GSC_DMA,
+ GSC_MIXER,
+ GSC_FIMD,
+ GSC_WRITEBACK,
+};
+
+enum gsc_color_fmt {
+ GSC_RGB = 0x1,
+ GSC_YUV420 = 0x2,
+ GSC_YUV422 = 0x4,
+ GSC_YUV444 = 0x8,
+};
+
+enum gsc_yuv_fmt {
+ GSC_LSB_Y = 0x10,
+ GSC_LSB_C,
+ GSC_CBCR = 0x20,
+ GSC_CRCB,
+};
+
+#define fh_to_ctx(__fh) container_of(__fh, struct gsc_ctx, fh)
+#define is_rgb(x) (!!((x) & 0x1))
+#define is_yuv420(x) (!!((x) & 0x2))
+#define is_yuv422(x) (!!((x) & 0x4))
+
+#define gsc_m2m_active(dev) test_bit(ST_M2M_RUN, &(dev)->state)
+#define gsc_m2m_pending(dev) test_bit(ST_M2M_PEND, &(dev)->state)
+#define gsc_m2m_opened(dev) test_bit(ST_M2M_OPEN, &(dev)->state)
+
+#define ctrl_to_ctx(__ctrl) \
+ container_of((__ctrl)->handler, struct gsc_ctx, ctrl_handler)
+/**
+ * struct gsc_fmt - the driver's internal color format data
+ * @mbus_code: Media Bus pixel code, -1 if not applicable
+ * @name: format description
+ * @pixelformat: the fourcc code for this format, 0 if not applicable
+ * @yorder: Y/C order
+ * @corder: Chrominance order control
+ * @num_planes: number of physically non-contiguous data planes
+ * @nr_comp: number of physically contiguous data planes
+ * @depth: per plane driver's private 'number of bits per pixel'
+ * @flags: flags indicating which operation mode format applies to
+ */
+struct gsc_fmt {
+ enum v4l2_mbus_pixelcode mbus_code;
+ char *name;
+ u32 pixelformat;
+ u32 color;
+ u32 yorder;
+ u32 corder;
+ u16 num_planes;
+ u16 num_comp;
+ u8 depth[VIDEO_MAX_PLANES];
+ u32 flags;
+};
+
+/**
+ * struct gsc_input_buf - the driver's video buffer
+ * @vb: videobuf2 buffer
+ * @list : linked list structure for buffer queue
+ * @idx : index of G-Scaler input buffer
+ */
+struct gsc_input_buf {
+ struct vb2_buffer vb;
+ struct list_head list;
+ int idx;
+};
+
+/**
+ * struct gsc_addr - the G-Scaler physical address set
+ * @y: luminance plane address
+ * @cb: Cb plane address
+ * @cr: Cr plane address
+ */
+struct gsc_addr {
+ dma_addr_t y;
+ dma_addr_t cb;
+ dma_addr_t cr;
+};
+
+/* struct gsc_ctrls - the G-Scaler control set
+ * @rotate: rotation degree
+ * @hflip: horizontal flip
+ * @vflip: vertical flip
+ * @global_alpha: the alpha value of current frame
+ */
+struct gsc_ctrls {
+ struct v4l2_ctrl *rotate;
+ struct v4l2_ctrl *hflip;
+ struct v4l2_ctrl *vflip;
+ struct v4l2_ctrl *global_alpha;
+};
+
+/**
+ * struct gsc_scaler - the configuration data for G-Scaler inetrnal scaler
+ * @pre_shfactor: pre sclaer shift factor
+ * @pre_hratio: horizontal ratio of the prescaler
+ * @pre_vratio: vertical ratio of the prescaler
+ * @main_hratio: the main scaler's horizontal ratio
+ * @main_vratio: the main scaler's vertical ratio
+ */
+struct gsc_scaler {
+ u32 pre_shfactor;
+ u32 pre_hratio;
+ u32 pre_vratio;
+ u32 main_hratio;
+ u32 main_vratio;
+};
+
+struct gsc_dev;
+
+struct gsc_ctx;
+
+/**
+ * struct gsc_frame - source/target frame properties
+ * @f_width: SRC : SRCIMG_WIDTH, DST : OUTPUTDMA_WHOLE_IMG_WIDTH
+ * @f_height: SRC : SRCIMG_HEIGHT, DST : OUTPUTDMA_WHOLE_IMG_HEIGHT
+ * @crop: cropped(source)/scaled(destination) size
+ * @payload: image size in bytes (w x h x bpp)
+ * @addr: image frame buffer physical addresses
+ * @fmt: G-Scaler color format pointer
+ * @colorspace: value indicating v4l2_colorspace
+ * @alpha: frame's alpha value
+ */
+struct gsc_frame {
+ u32 f_width;
+ u32 f_height;
+ struct v4l2_rect crop;
+ unsigned long payload[VIDEO_MAX_PLANES];
+ struct gsc_addr addr;
+ const struct gsc_fmt *fmt;
+ u32 colorspace;
+ u8 alpha;
+};
+
+/**
+ * struct gsc_m2m_device - v4l2 memory-to-memory device data
+ * @vfd: the video device node for v4l2 m2m mode
+ * @m2m_dev: v4l2 memory-to-memory device data
+ * @ctx: hardware context data
+ * @refcnt: the reference counter
+ */
+struct gsc_m2m_device {
+ struct video_device *vfd;
+ struct v4l2_m2m_dev *m2m_dev;
+ struct gsc_ctx *ctx;
+ int refcnt;
+};
+
+/**
+ * struct gsc_pix_max - image pixel size limits in various IP configurations
+ *
+ * @org_scaler_bypass_w: max pixel width when the scaler is disabled
+ * @org_scaler_bypass_h: max pixel height when the scaler is disabled
+ * @org_scaler_input_w: max pixel width when the scaler is enabled
+ * @org_scaler_input_h: max pixel height when the scaler is enabled
+ * @real_rot_dis_w: max pixel src cropped height with the rotator is off
+ * @real_rot_dis_h: max pixel src croppped width with the rotator is off
+ * @real_rot_en_w: max pixel src cropped width with the rotator is on
+ * @real_rot_en_h: max pixel src cropped height with the rotator is on
+ * @target_rot_dis_w: max pixel dst scaled width with the rotator is off
+ * @target_rot_dis_h: max pixel dst scaled height with the rotator is off
+ * @target_rot_en_w: max pixel dst scaled width with the rotator is on
+ * @target_rot_en_h: max pixel dst scaled height with the rotator is on
+ */
+struct gsc_pix_max {
+ u16 org_scaler_bypass_w;
+ u16 org_scaler_bypass_h;
+ u16 org_scaler_input_w;
+ u16 org_scaler_input_h;
+ u16 real_rot_dis_w;
+ u16 real_rot_dis_h;
+ u16 real_rot_en_w;
+ u16 real_rot_en_h;
+ u16 target_rot_dis_w;
+ u16 target_rot_dis_h;
+ u16 target_rot_en_w;
+ u16 target_rot_en_h;
+};
+
+/**
+ * struct gsc_pix_min - image pixel size limits in various IP configurations
+ *
+ * @org_w: minimum source pixel width
+ * @org_h: minimum source pixel height
+ * @real_w: minimum input crop pixel width
+ * @real_h: minimum input crop pixel height
+ * @target_rot_dis_w: minimum output scaled pixel height when rotator is off
+ * @target_rot_dis_h: minimum output scaled pixel height when rotator is off
+ * @target_rot_en_w: minimum output scaled pixel height when rotator is on
+ * @target_rot_en_h: minimum output scaled pixel height when rotator is on
+ */
+struct gsc_pix_min {
+ u16 org_w;
+ u16 org_h;
+ u16 real_w;
+ u16 real_h;
+ u16 target_rot_dis_w;
+ u16 target_rot_dis_h;
+ u16 target_rot_en_w;
+ u16 target_rot_en_h;
+};
+
+struct gsc_pix_align {
+ u16 org_h;
+ u16 org_w;
+ u16 offset_h;
+ u16 real_w;
+ u16 real_h;
+ u16 target_w;
+ u16 target_h;
+};
+
+/**
+ * struct gsc_variant - G-Scaler variant information
+ */
+struct gsc_variant {
+ struct gsc_pix_max *pix_max;
+ struct gsc_pix_min *pix_min;
+ struct gsc_pix_align *pix_align;
+ u16 in_buf_cnt;
+ u16 out_buf_cnt;
+ u16 sc_up_max;
+ u16 sc_down_max;
+ u16 poly_sc_down_max;
+ u16 pre_sc_down_max;
+ u16 local_sc_down;
+};
+
+/**
+ * struct gsc_driverdata - per device type driver data for init time.
+ *
+ * @variant: the variant information for this driver.
+ * @lclk_frequency: G-Scaler clock frequency
+ * @num_entities: the number of g-scalers
+ */
+struct gsc_driverdata {
+ struct gsc_variant *variant[GSC_MAX_DEVS];
+ unsigned long lclk_frequency;
+ int num_entities;
+};
+
+/**
+ * struct gsc_dev - abstraction for G-Scaler entity
+ * @slock: the spinlock protecting this data structure
+ * @lock: the mutex protecting this data structure
+ * @pdev: pointer to the G-Scaler platform device
+ * @variant: the IP variant information
+ * @id: G-Scaler device index (0..GSC_MAX_DEVS)
+ * @clock: clocks required for G-Scaler operation
+ * @regs: the mapped hardware registers
+ * @irq_queue: interrupt handler waitqueue
+ * @m2m: memory-to-memory V4L2 device information
+ * @state: flags used to synchronize m2m and capture mode operation
+ * @alloc_ctx: videobuf2 memory allocator context
+ * @vdev: video device for G-Scaler instance
+ */
+struct gsc_dev {
+ spinlock_t slock;
+ struct mutex lock;
+ struct platform_device *pdev;
+ struct gsc_variant *variant;
+ u16 id;
+ struct clk *clock;
+ void __iomem *regs;
+ wait_queue_head_t irq_queue;
+ struct gsc_m2m_device m2m;
+ struct exynos_platform_gscaler *pdata;
+ unsigned long state;
+ struct vb2_alloc_ctx *alloc_ctx;
+ struct video_device vdev;
+};
+
+/**
+ * gsc_ctx - the device context data
+ * @s_frame: source frame properties
+ * @d_frame: destination frame properties
+ * @in_path: input mode (DMA or camera)
+ * @out_path: output mode (DMA or FIFO)
+ * @scaler: image scaler properties
+ * @flags: additional flags for image conversion
+ * @state: flags to keep track of user configuration
+ * @gsc_dev: the G-Scaler device this context applies to
+ * @m2m_ctx: memory-to-memory device context
+ * @fh: v4l2 file handle
+ * @ctrl_handler: v4l2 controls handler
+ * @gsc_ctrls G-Scaler control set
+ * @ctrls_rdy: true if the control handler is initialized
+ */
+struct gsc_ctx {
+ struct gsc_frame s_frame;
+ struct gsc_frame d_frame;
+ enum gsc_datapath in_path;
+ enum gsc_datapath out_path;
+ struct gsc_scaler scaler;
+ u32 flags;
+ u32 state;
+ int rotation;
+ unsigned int hflip:1;
+ unsigned int vflip:1;
+ struct gsc_dev *gsc_dev;
+ struct v4l2_m2m_ctx *m2m_ctx;
+ struct v4l2_fh fh;
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct gsc_ctrls gsc_ctrls;
+ bool ctrls_rdy;
+};
+
+void gsc_set_prefbuf(struct gsc_dev *gsc, struct gsc_frame *frm);
+int gsc_register_m2m_device(struct gsc_dev *gsc);
+void gsc_unregister_m2m_device(struct gsc_dev *gsc);
+void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state);
+
+u32 get_plane_size(struct gsc_frame *fr, unsigned int plane);
+const struct gsc_fmt *get_format(int index);
+const struct gsc_fmt *find_fmt(u32 *pixelformat, u32 *mbus_code, u32 index);
+int gsc_enum_fmt_mplane(struct v4l2_fmtdesc *f);
+int gsc_try_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f);
+void gsc_set_frame_size(struct gsc_frame *frame, int width, int height);
+int gsc_g_fmt_mplane(struct gsc_ctx *ctx, struct v4l2_format *f);
+void gsc_check_crop_change(u32 tmp_w, u32 tmp_h, u32 *w, u32 *h);
+int gsc_g_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr);
+int gsc_try_crop(struct gsc_ctx *ctx, struct v4l2_crop *cr);
+int gsc_cal_prescaler_ratio(struct gsc_variant *var, u32 src, u32 dst,
+ u32 *ratio);
+void gsc_get_prescaler_shfactor(u32 hratio, u32 vratio, u32 *sh);
+void gsc_check_src_scale_info(struct gsc_variant *var,
+ struct gsc_frame *s_frame,
+ u32 *wratio, u32 tx, u32 ty, u32 *hratio);
+int gsc_check_scaler_ratio(struct gsc_variant *var, int sw, int sh, int dw,
+ int dh, int rot, int out_path);
+int gsc_set_scaler_info(struct gsc_ctx *ctx);
+int gsc_ctrls_create(struct gsc_ctx *ctx);
+void gsc_ctrls_delete(struct gsc_ctx *ctx);
+int gsc_prepare_addr(struct gsc_ctx *ctx, struct vb2_buffer *vb,
+ struct gsc_frame *frame, struct gsc_addr *addr);
+
+static inline void gsc_ctx_state_lock_set(u32 state, struct gsc_ctx *ctx)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
+ ctx->state |= state;
+ spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
+}
+
+static inline void gsc_ctx_state_lock_clear(u32 state, struct gsc_ctx *ctx)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
+ ctx->state &= ~state;
+ spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
+}
+
+static inline void gsc_hw_enable_control(struct gsc_dev *dev, bool on)
+{
+ u32 cfg = readl(dev->regs + GSC_ENABLE);
+
+ if (on)
+ cfg |= GSC_ENABLE_ON;
+ else
+ cfg &= ~GSC_ENABLE_ON;
+
+ writel(cfg, dev->regs + GSC_ENABLE);
+}
+
+static inline int gsc_hw_get_irq_status(struct gsc_dev *dev)
+{
+ u32 cfg = readl(dev->regs + GSC_IRQ);
+ if (cfg & GSC_IRQ_STATUS_OR_IRQ)
+ return GSC_IRQ_OVERRUN;
+ else
+ return GSC_IRQ_DONE;
+
+}
+
+static inline void gsc_hw_clear_irq(struct gsc_dev *dev, int irq)
+{
+ u32 cfg = readl(dev->regs + GSC_IRQ);
+ if (irq == GSC_IRQ_OVERRUN)
+ cfg |= GSC_IRQ_STATUS_OR_IRQ;
+ else if (irq == GSC_IRQ_DONE)
+ cfg |= GSC_IRQ_STATUS_FRM_DONE_IRQ;
+ writel(cfg, dev->regs + GSC_IRQ);
+}
+
+static inline void gsc_lock(struct vb2_queue *vq)
+{
+ struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
+ mutex_lock(&ctx->gsc_dev->lock);
+}
+
+static inline void gsc_unlock(struct vb2_queue *vq)
+{
+ struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
+ mutex_unlock(&ctx->gsc_dev->lock);
+}
+
+static inline bool gsc_ctx_state_is_set(u32 mask, struct gsc_ctx *ctx)
+{
+ unsigned long flags;
+ bool ret;
+
+ spin_lock_irqsave(&ctx->gsc_dev->slock, flags);
+ ret = (ctx->state & mask) == mask;
+ spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
+ return ret;
+}
+
+static inline struct gsc_frame *ctx_get_frame(struct gsc_ctx *ctx,
+ enum v4l2_buf_type type)
+{
+ struct gsc_frame *frame;
+
+ if (V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE == type) {
+ frame = &ctx->s_frame;
+ } else if (V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == type) {
+ frame = &ctx->d_frame;
+ } else {
+ pr_err("Wrong buffer/video queue type (%d)", type);
+ return ERR_PTR(-EINVAL);
+ }
+
+ return frame;
+}
+
+static inline void user_to_drv(struct v4l2_ctrl *ctrl, s32 value)
+{
+ ctrl->cur.val = ctrl->val = value;
+}
+
+void gsc_hw_set_sw_reset(struct gsc_dev *dev);
+int gsc_wait_reset(struct gsc_dev *dev);
+
+void gsc_hw_set_frm_done_irq_mask(struct gsc_dev *dev, bool mask);
+void gsc_hw_set_gsc_irq_enable(struct gsc_dev *dev, bool mask);
+void gsc_hw_set_input_buf_masking(struct gsc_dev *dev, u32 shift, bool enable);
+void gsc_hw_set_output_buf_masking(struct gsc_dev *dev, u32 shift, bool enable);
+void gsc_hw_set_input_addr(struct gsc_dev *dev, struct gsc_addr *addr,
+ int index);
+void gsc_hw_set_output_addr(struct gsc_dev *dev, struct gsc_addr *addr,
+ int index);
+void gsc_hw_set_input_path(struct gsc_ctx *ctx);
+void gsc_hw_set_in_size(struct gsc_ctx *ctx);
+void gsc_hw_set_in_image_rgb(struct gsc_ctx *ctx);
+void gsc_hw_set_in_image_format(struct gsc_ctx *ctx);
+void gsc_hw_set_output_path(struct gsc_ctx *ctx);
+void gsc_hw_set_out_size(struct gsc_ctx *ctx);
+void gsc_hw_set_out_image_rgb(struct gsc_ctx *ctx);
+void gsc_hw_set_out_image_format(struct gsc_ctx *ctx);
+void gsc_hw_set_prescaler(struct gsc_ctx *ctx);
+void gsc_hw_set_mainscaler(struct gsc_ctx *ctx);
+void gsc_hw_set_rotation(struct gsc_ctx *ctx);
+void gsc_hw_set_global_alpha(struct gsc_ctx *ctx);
+void gsc_hw_set_sfr_update(struct gsc_ctx *ctx);
+
+#endif /* GSC_CORE_H_ */
--
1.7.0.4
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH v5 4/5] media: gscaler: Add m2m functionality for the G-Scaler driver
2012-07-31 13:44 [PATCH v5 0/5] Add new driver for generic scaler Shaik Ameer Basha
` (2 preceding siblings ...)
2012-07-31 13:44 ` [PATCH v5 3/5] media: gscaler: Add core functionality for the G-Scaler driver Shaik Ameer Basha
@ 2012-07-31 13:44 ` Shaik Ameer Basha
2012-07-31 13:44 ` [PATCH v5 5/5] media: gscaler: Add Makefile for G-Scaler Driver Shaik Ameer Basha
` (2 subsequent siblings)
6 siblings, 0 replies; 9+ messages in thread
From: Shaik Ameer Basha @ 2012-07-31 13:44 UTC (permalink / raw)
To: linux-media
Cc: sungchun.kang, khw0178.kim, mchehab, laurent.pinchart,
sy0816.kang, s.nawrocki, posciak, hverkuil, alim.akhtar,
prashanth.g, joshi, shaik.samsung, shaik.ameer
From: Sungchun Kang <sungchun.kang@samsung.com>
This patch adds the memory to memory (m2m) interface functionality
for the G-Scaler driver.
Signed-off-by: Hynwoong Kim <khw0178.kim@samsung.com>
Signed-off-by: Sungchun Kang <sungchun.kang@samsung.com>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
---
drivers/media/video/exynos-gsc/gsc-m2m.c | 771 ++++++++++++++++++++++++++++++
1 files changed, 771 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/exynos-gsc/gsc-m2m.c
diff --git a/drivers/media/video/exynos-gsc/gsc-m2m.c b/drivers/media/video/exynos-gsc/gsc-m2m.c
new file mode 100644
index 0000000..ea14aba
--- /dev/null
+++ b/drivers/media/video/exynos-gsc/gsc-m2m.c
@@ -0,0 +1,771 @@
+/*
+ * 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 "gsc-core.h"
+
+static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx)
+{
+ struct gsc_ctx *curr_ctx;
+ struct gsc_dev *gsc = ctx->gsc_dev;
+ int ret;
+
+ curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
+ if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx))
+ return 0;
+
+ gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx);
+ ret = wait_event_timeout(gsc->irq_queue,
+ !gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx),
+ GSC_SHUTDOWN_TIMEOUT);
+
+ return ret == 0 ? -ETIMEDOUT : ret;
+}
+
+static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ struct gsc_ctx *ctx = q->drv_priv;
+ int ret;
+
+ ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev);
+ return ret > 0 ? 0 : ret;
+}
+
+static int gsc_m2m_stop_streaming(struct vb2_queue *q)
+{
+ struct gsc_ctx *ctx = q->drv_priv;
+ int ret;
+
+ ret = gsc_m2m_ctx_stop_req(ctx);
+ if (ret == -ETIMEDOUT)
+ gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
+
+ pm_runtime_put(&ctx->gsc_dev->pdev->dev);
+
+ return 0;
+}
+
+void gsc_m2m_job_finish(struct gsc_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->gsc_dev->m2m.m2m_dev,
+ ctx->m2m_ctx);
+ }
+}
+
+
+static void gsc_m2m_job_abort(void *priv)
+{
+ struct gsc_ctx *ctx = priv;
+ int ret;
+
+ ret = gsc_m2m_ctx_stop_req(ctx);
+ if (ret == -ETIMEDOUT)
+ gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
+}
+
+int gsc_fill_addr(struct gsc_ctx *ctx)
+{
+ struct gsc_frame *s_frame, *d_frame;
+ struct vb2_buffer *vb = NULL;
+ int ret;
+
+ s_frame = &ctx->s_frame;
+ d_frame = &ctx->d_frame;
+
+ vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
+ ret = gsc_prepare_addr(ctx, vb, s_frame, &s_frame->addr);
+ if (ret)
+ return ret;
+
+ vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
+ return gsc_prepare_addr(ctx, vb, d_frame, &d_frame->addr);
+}
+
+static void gsc_m2m_device_run(void *priv)
+{
+ struct gsc_ctx *ctx = priv;
+ struct gsc_dev *gsc;
+ unsigned long flags;
+ u32 ret;
+ bool is_set = false;
+
+ if (WARN(!ctx, "null hardware context\n"))
+ return;
+
+ gsc = ctx->gsc_dev;
+ spin_lock_irqsave(&gsc->slock, flags);
+
+ set_bit(ST_M2M_PEND, &gsc->state);
+
+ /* Reconfigure hardware if the context has changed. */
+ if (gsc->m2m.ctx != ctx) {
+ pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p",
+ gsc->m2m.ctx, ctx);
+ ctx->state |= GSC_PARAMS;
+ gsc->m2m.ctx = ctx;
+ }
+
+ is_set = (ctx->state & GSC_CTX_STOP_REQ) ? 1 : 0;
+ ctx->state &= ~GSC_CTX_STOP_REQ;
+ if (is_set) {
+ wake_up(&gsc->irq_queue);
+ goto put_device;
+ }
+
+ ret = gsc_fill_addr(ctx);
+ if (ret) {
+ pr_err("Wrong address");
+ goto put_device;
+ }
+
+ gsc_set_prefbuf(gsc, &ctx->s_frame);
+ gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM);
+ gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM);
+
+ if (ctx->state & GSC_PARAMS) {
+ gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
+ gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
+ gsc_hw_set_frm_done_irq_mask(gsc, false);
+ gsc_hw_set_gsc_irq_enable(gsc, true);
+
+ if (gsc_set_scaler_info(ctx)) {
+ pr_err("Scaler setup error");
+ goto put_device;
+ }
+
+ gsc_hw_set_input_path(ctx);
+ gsc_hw_set_in_size(ctx);
+ gsc_hw_set_in_image_format(ctx);
+
+ gsc_hw_set_output_path(ctx);
+ gsc_hw_set_out_size(ctx);
+ gsc_hw_set_out_image_format(ctx);
+
+ gsc_hw_set_prescaler(ctx);
+ gsc_hw_set_mainscaler(ctx);
+ gsc_hw_set_rotation(ctx);
+ gsc_hw_set_global_alpha(ctx);
+ }
+
+ /* update shadow registers */
+ gsc_hw_set_sfr_update(ctx);
+
+ ctx->state &= ~GSC_PARAMS;
+ gsc_hw_enable_control(gsc, true);
+
+ spin_unlock_irqrestore(&gsc->slock, flags);
+ return;
+
+put_device:
+ ctx->state &= ~GSC_PARAMS;
+ spin_unlock_irqrestore(&gsc->slock, flags);
+}
+
+static int gsc_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 gsc_ctx *ctx = vb2_get_drv_priv(vq);
+ struct gsc_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->gsc_dev->alloc_ctx;
+ }
+ return 0;
+}
+
+static int gsc_m2m_buf_prepare(struct vb2_buffer *vb)
+{
+ struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct gsc_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 gsc_m2m_buf_queue(struct vb2_buffer *vb)
+{
+ struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+ pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
+
+ if (ctx->m2m_ctx)
+ v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
+}
+
+struct vb2_ops gsc_m2m_qops = {
+ .queue_setup = gsc_m2m_queue_setup,
+ .buf_prepare = gsc_m2m_buf_prepare,
+ .buf_queue = gsc_m2m_buf_queue,
+ .wait_prepare = gsc_unlock,
+ .wait_finish = gsc_lock,
+ .stop_streaming = gsc_m2m_stop_streaming,
+ .start_streaming = gsc_m2m_start_streaming,
+};
+
+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;
+
+ strlcpy(cap->driver, gsc->pdev->name, sizeof(cap->driver));
+ strlcpy(cap->card, gsc->pdev->name, sizeof(cap->card));
+ strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info));
+ cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
+ V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
+
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int gsc_m2m_enum_fmt_mplane(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ return gsc_enum_fmt_mplane(f);
+}
+
+static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+
+ return gsc_g_fmt_mplane(ctx, f);
+}
+
+static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+
+ return gsc_try_fmt_mplane(ctx, f);
+}
+
+static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+ struct vb2_queue *vq;
+ struct gsc_frame *frame;
+ struct v4l2_pix_format_mplane *pix;
+ int i, ret = 0;
+
+ ret = gsc_m2m_try_fmt_mplane(file, fh, f);
+ if (ret)
+ return ret;
+
+ vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+
+ if (vb2_is_streaming(vq)) {
+ pr_err("queue (%d) busy", f->type);
+ return -EBUSY;
+ }
+
+ if (V4L2_TYPE_IS_OUTPUT(f->type))
+ frame = &ctx->s_frame;
+ else
+ frame = &ctx->d_frame;
+
+ pix = &f->fmt.pix_mp;
+ frame->fmt = find_fmt(&pix->pixelformat, NULL, 0);
+ frame->colorspace = pix->colorspace;
+ if (!frame->fmt)
+ return -EINVAL;
+
+ for (i = 0; i < frame->fmt->num_planes; i++)
+ frame->payload[i] = pix->plane_fmt[i].sizeimage;
+
+ gsc_set_frame_size(frame, pix->width, pix->height);
+
+ if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx);
+ else
+ gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx);
+
+ pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
+
+ return 0;
+}
+
+static int gsc_m2m_reqbufs(struct file *file, void *fh,
+ struct v4l2_requestbuffers *reqbufs)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+ struct gsc_dev *gsc = ctx->gsc_dev;
+ struct gsc_frame *frame;
+ u32 max_cnt;
+
+ max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
+ gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt;
+ if (reqbufs->count > max_cnt) {
+ return -EINVAL;
+ } else if (reqbufs->count == 0) {
+ if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+ gsc_ctx_state_lock_clear(GSC_SRC_FMT, ctx);
+ else
+ gsc_ctx_state_lock_clear(GSC_DST_FMT, ctx);
+ }
+
+ frame = ctx_get_frame(ctx, reqbufs->type);
+
+ return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
+}
+
+static int gsc_m2m_querybuf(struct file *file, void *fh,
+ struct v4l2_buffer *buf)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+ return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
+}
+
+static int gsc_m2m_qbuf(struct file *file, void *fh,
+ struct v4l2_buffer *buf)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+ return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int gsc_m2m_dqbuf(struct file *file, void *fh,
+ struct v4l2_buffer *buf)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+ return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
+}
+
+static int gsc_m2m_streamon(struct file *file, void *fh,
+ enum v4l2_buf_type type)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+
+ /* The source and target color format need to be set */
+ if (V4L2_TYPE_IS_OUTPUT(type)) {
+ if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx))
+ return -EINVAL;
+ } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) {
+ return -EINVAL;
+ }
+
+ return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
+}
+
+static int gsc_m2m_streamoff(struct file *file, void *fh,
+ enum v4l2_buf_type type)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(fh);
+ return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
+}
+
+/* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
+static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
+{
+ if (a->left < b->left || a->top < b->top)
+ return 0;
+
+ if (a->left + a->width > b->left + b->width)
+ return 0;
+
+ if (a->top + a->height > b->top + b->height)
+ return 0;
+
+ return 1;
+}
+
+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:
+ case V4L2_SEL_TGT_CROP:
+ 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:
+ frame = &ctx->s_frame;
+ break;
+
+ case V4L2_SEL_TGT_CROP_BOUNDS:
+ case 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) {
+ pr_err("Out of scaler range");
+ return -EINVAL;
+ }
+ }
+
+ frame->crop = cr.c;
+
+ gsc_ctx_state_lock_set(GSC_PARAMS, ctx);
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = {
+ .vidioc_querycap = gsc_m2m_querycap,
+ .vidioc_enum_fmt_vid_cap_mplane = gsc_m2m_enum_fmt_mplane,
+ .vidioc_enum_fmt_vid_out_mplane = gsc_m2m_enum_fmt_mplane,
+ .vidioc_g_fmt_vid_cap_mplane = gsc_m2m_g_fmt_mplane,
+ .vidioc_g_fmt_vid_out_mplane = gsc_m2m_g_fmt_mplane,
+ .vidioc_try_fmt_vid_cap_mplane = gsc_m2m_try_fmt_mplane,
+ .vidioc_try_fmt_vid_out_mplane = gsc_m2m_try_fmt_mplane,
+ .vidioc_s_fmt_vid_cap_mplane = gsc_m2m_s_fmt_mplane,
+ .vidioc_s_fmt_vid_out_mplane = gsc_m2m_s_fmt_mplane,
+ .vidioc_reqbufs = gsc_m2m_reqbufs,
+ .vidioc_querybuf = gsc_m2m_querybuf,
+ .vidioc_qbuf = gsc_m2m_qbuf,
+ .vidioc_dqbuf = gsc_m2m_dqbuf,
+ .vidioc_streamon = gsc_m2m_streamon,
+ .vidioc_streamoff = gsc_m2m_streamoff,
+ .vidioc_g_selection = gsc_m2m_g_selection,
+ .vidioc_s_selection = gsc_m2m_s_selection
+};
+
+static int queue_init(void *priv, struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct gsc_ctx *ctx = priv;
+ int ret;
+
+ memset(src_vq, 0, sizeof(*src_vq));
+ src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+ src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+ src_vq->drv_priv = ctx;
+ src_vq->ops = &gsc_m2m_qops;
+ src_vq->mem_ops = &vb2_dma_contig_memops;
+ src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+
+ ret = vb2_queue_init(src_vq);
+ if (ret)
+ return ret;
+
+ memset(dst_vq, 0, sizeof(*dst_vq));
+ dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+ dst_vq->drv_priv = ctx;
+ dst_vq->ops = &gsc_m2m_qops;
+ dst_vq->mem_ops = &vb2_dma_contig_memops;
+ dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
+
+ return vb2_queue_init(dst_vq);
+}
+
+static int gsc_m2m_open(struct file *file)
+{
+ struct gsc_dev *gsc = video_drvdata(file);
+ struct gsc_ctx *ctx = NULL;
+ int ret;
+
+ pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state);
+
+ if (mutex_lock_interruptible(&gsc->lock))
+ return -ERESTARTSYS;
+
+ ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
+ if (!ctx) {
+ ret = -ENOMEM;
+ goto unlock;
+ }
+
+ 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;
+
+ ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init);
+ if (IS_ERR(ctx->m2m_ctx)) {
+ pr_err("Failed to initialize m2m context");
+ ret = PTR_ERR(ctx->m2m_ctx);
+ goto error_ctrls;
+ }
+
+ if (gsc->m2m.refcnt++ == 0)
+ set_bit(ST_M2M_OPEN, &gsc->state);
+
+ pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx);
+
+ mutex_unlock(&gsc->lock);
+ return 0;
+
+error_ctrls:
+ gsc_ctrls_delete(ctx);
+error_fh:
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+ kfree(ctx);
+unlock:
+ mutex_unlock(&gsc->lock);
+ 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;
+
+ pr_debug("pid: %d, state: 0x%lx, refcnt= %d",
+ task_pid_nr(current), gsc->state, gsc->m2m.refcnt);
+
+ if (mutex_lock_interruptible(&gsc->lock))
+ return -ERESTARTSYS;
+
+ 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);
+
+ mutex_unlock(&gsc->lock);
+ 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);
+ struct gsc_dev *gsc = ctx->gsc_dev;
+ int ret;
+
+ if (mutex_lock_interruptible(&gsc->lock))
+ return -ERESTARTSYS;
+
+ ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
+ mutex_unlock(&gsc->lock);
+
+ return ret;
+}
+
+static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
+ struct gsc_dev *gsc = ctx->gsc_dev;
+ int ret;
+
+ if (mutex_lock_interruptible(&gsc->lock))
+ return -ERESTARTSYS;
+
+ ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
+ mutex_unlock(&gsc->lock);
+
+ return ret;
+}
+
+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,
+};
+
+static struct v4l2_m2m_ops gsc_m2m_ops = {
+ .device_run = gsc_m2m_device_run,
+ .job_abort = gsc_m2m_job_abort,
+};
+
+int gsc_register_m2m_device(struct gsc_dev *gsc)
+{
+ struct platform_device *pdev;
+ int ret;
+
+ if (!gsc)
+ return -ENODEV;
+
+ pdev = gsc->pdev;
+
+ gsc->vdev.fops = &gsc_m2m_fops;
+ gsc->vdev.ioctl_ops = &gsc_m2m_ioctl_ops;
+ gsc->vdev.release = video_device_release_empty;
+ gsc->vdev.lock = &gsc->lock;
+ snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m",
+ GSC_MODULE_NAME, gsc->id);
+
+ video_set_drvdata(&gsc->vdev, gsc);
+
+ gsc->m2m.vfd = &gsc->vdev;
+ gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops);
+ if (IS_ERR(gsc->m2m.m2m_dev)) {
+ dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n");
+ ret = PTR_ERR(gsc->m2m.m2m_dev);
+ goto err_m2m_r1;
+ }
+
+ ret = video_register_device(&gsc->vdev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "%s(): failed to register video device\n", __func__);
+ goto err_m2m_r2;
+ }
+
+ pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num);
+ return 0;
+
+err_m2m_r2:
+ v4l2_m2m_release(gsc->m2m.m2m_dev);
+err_m2m_r1:
+ video_device_release(gsc->m2m.vfd);
+
+ return ret;
+}
+
+void gsc_unregister_m2m_device(struct gsc_dev *gsc)
+{
+ if (gsc)
+ v4l2_m2m_release(gsc->m2m.m2m_dev);
+}
--
1.7.0.4
^ permalink raw reply related [flat|nested] 9+ messages in thread