From 69c536b2c2b338e0a162626aee5059e4e1c197eb Mon Sep 17 00:00:00 2001 From: Sergio Aguirre Date: Mon, 24 Jan 2011 15:48:19 -0300 Subject: [PATCH] [media] v4l: omap4iss: Add support for OMAP4 camera interface - Resizer This adds a very simplistic driver to utilize the CSI2A interface inside the ISS subsystem in OMAP4, and dump the data to memory. Check Documentation/video4linux/omap4_camera.txt for details. This commit adds resizer support. [Port the driver to v3.12-rc3, including the following changes - Don't include plat/ headers - Don't use cpu_is_omap44xx() macro - Don't depend on EXPERIMENTAL - Fix s_crop operation prototype - Update link_notify prototype - Rename media_entity_remote_source to media_entity_remote_pad] Signed-off-by: Sergio Aguirre Signed-off-by: Laurent Pinchart Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/omap4iss/iss_resizer.c | 905 +++++++++++++++++++++++++++ drivers/staging/media/omap4iss/iss_resizer.h | 75 +++ 2 files changed, 980 insertions(+) create mode 100644 drivers/staging/media/omap4iss/iss_resizer.c create mode 100644 drivers/staging/media/omap4iss/iss_resizer.h diff --git a/drivers/staging/media/omap4iss/iss_resizer.c b/drivers/staging/media/omap4iss/iss_resizer.c new file mode 100644 index 0000000..cb5df52 --- /dev/null +++ b/drivers/staging/media/omap4iss/iss_resizer.c @@ -0,0 +1,905 @@ +/* + * TI OMAP4 ISS V4L2 Driver - ISP RESIZER module + * + * Copyright (C) 2012 Texas Instruments, Inc. + * + * Author: Sergio Aguirre + * + * 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 +#include +#include +#include +#include +#include +#include + +#include "iss.h" +#include "iss_regs.h" +#include "iss_resizer.h" + +static struct v4l2_mbus_framefmt * +__resizer_get_format(struct iss_resizer_device *resizer, struct v4l2_subdev_fh *fh, + unsigned int pad, enum v4l2_subdev_format_whence which); + +static const unsigned int resizer_fmts[] = { + V4L2_MBUS_FMT_UYVY8_1X16, + V4L2_MBUS_FMT_YUYV8_1X16, +}; + +/* + * resizer_print_status - Print current RESIZER Module register values. + * @resizer: Pointer to ISS ISP RESIZER device. + * + * Also prints other debug information stored in the RESIZER module. + */ +#define RSZ_PRINT_REGISTER(iss, name)\ + dev_dbg(iss->dev, "###RSZ " #name "=0x%08x\n", \ + readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_##name)) + +#define RZA_PRINT_REGISTER(iss, name)\ + dev_dbg(iss->dev, "###RZA " #name "=0x%08x\n", \ + readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_##name)) + +static void resizer_print_status(struct iss_resizer_device *resizer) +{ + struct iss_device *iss = to_iss_device(resizer); + + dev_dbg(iss->dev, "-------------RESIZER Register dump-------------\n"); + + RSZ_PRINT_REGISTER(iss, SYSCONFIG); + RSZ_PRINT_REGISTER(iss, IN_FIFO_CTRL); + RSZ_PRINT_REGISTER(iss, FRACDIV); + RSZ_PRINT_REGISTER(iss, SRC_EN); + RSZ_PRINT_REGISTER(iss, SRC_MODE); + RSZ_PRINT_REGISTER(iss, SRC_FMT0); + RSZ_PRINT_REGISTER(iss, SRC_FMT1); + RSZ_PRINT_REGISTER(iss, SRC_VPS); + RSZ_PRINT_REGISTER(iss, SRC_VSZ); + RSZ_PRINT_REGISTER(iss, SRC_HPS); + RSZ_PRINT_REGISTER(iss, SRC_HSZ); + RSZ_PRINT_REGISTER(iss, DMA_RZA); + RSZ_PRINT_REGISTER(iss, DMA_RZB); + RSZ_PRINT_REGISTER(iss, DMA_STA); + RSZ_PRINT_REGISTER(iss, GCK_MMR); + RSZ_PRINT_REGISTER(iss, GCK_SDR); + RSZ_PRINT_REGISTER(iss, IRQ_RZA); + RSZ_PRINT_REGISTER(iss, IRQ_RZB); + RSZ_PRINT_REGISTER(iss, YUV_Y_MIN); + RSZ_PRINT_REGISTER(iss, YUV_Y_MAX); + RSZ_PRINT_REGISTER(iss, YUV_C_MIN); + RSZ_PRINT_REGISTER(iss, YUV_C_MAX); + RSZ_PRINT_REGISTER(iss, SEQ); + + RZA_PRINT_REGISTER(iss, EN); + RZA_PRINT_REGISTER(iss, MODE); + RZA_PRINT_REGISTER(iss, 420); + RZA_PRINT_REGISTER(iss, I_VPS); + RZA_PRINT_REGISTER(iss, I_HPS); + RZA_PRINT_REGISTER(iss, O_VSZ); + RZA_PRINT_REGISTER(iss, O_HSZ); + RZA_PRINT_REGISTER(iss, V_PHS_Y); + RZA_PRINT_REGISTER(iss, V_PHS_C); + RZA_PRINT_REGISTER(iss, V_DIF); + RZA_PRINT_REGISTER(iss, V_TYP); + RZA_PRINT_REGISTER(iss, V_LPF); + RZA_PRINT_REGISTER(iss, H_PHS); + RZA_PRINT_REGISTER(iss, H_DIF); + RZA_PRINT_REGISTER(iss, H_TYP); + RZA_PRINT_REGISTER(iss, H_LPF); + RZA_PRINT_REGISTER(iss, DWN_EN); + RZA_PRINT_REGISTER(iss, SDR_Y_BAD_H); + RZA_PRINT_REGISTER(iss, SDR_Y_BAD_L); + RZA_PRINT_REGISTER(iss, SDR_Y_SAD_H); + RZA_PRINT_REGISTER(iss, SDR_Y_SAD_L); + RZA_PRINT_REGISTER(iss, SDR_Y_OFT); + RZA_PRINT_REGISTER(iss, SDR_Y_PTR_S); + RZA_PRINT_REGISTER(iss, SDR_Y_PTR_E); + RZA_PRINT_REGISTER(iss, SDR_C_BAD_H); + RZA_PRINT_REGISTER(iss, SDR_C_BAD_L); + RZA_PRINT_REGISTER(iss, SDR_C_SAD_H); + RZA_PRINT_REGISTER(iss, SDR_C_SAD_L); + RZA_PRINT_REGISTER(iss, SDR_C_OFT); + RZA_PRINT_REGISTER(iss, SDR_C_PTR_S); + RZA_PRINT_REGISTER(iss, SDR_C_PTR_E); + + dev_dbg(iss->dev, "-----------------------------------------------\n"); +} + +/* + * resizer_enable - Enable/Disable RESIZER. + * @enable: enable flag + * + */ +static void resizer_enable(struct iss_resizer_device *resizer, u8 enable) +{ + struct iss_device *iss = to_iss_device(resizer); + + writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_EN) & + ~RSZ_SRC_EN_SRC_EN) | + enable ? RSZ_SRC_EN_SRC_EN : 0, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_EN); + + /* TODO: Enable RSZB */ + writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_EN) & + ~RSZ_EN_EN) | + enable ? RSZ_EN_EN : 0, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_EN); +} + +/* ----------------------------------------------------------------------------- + * Format- and pipeline-related configuration helpers + */ + +/* + * resizer_set_outaddr - Set memory address to save output image + * @resizer: Pointer to ISP RESIZER device. + * @addr: 32-bit memory address aligned on 32 byte boundary. + * + * Sets the memory address where the output will be saved. + */ +static void resizer_set_outaddr(struct iss_resizer_device *resizer, u32 addr) +{ + struct iss_device *iss = to_iss_device(resizer); + struct v4l2_mbus_framefmt *informat, *outformat; + + informat = &resizer->formats[RESIZER_PAD_SINK]; + outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM]; + + /* Save address splitted in Base Address H & L */ + writel((addr >> 16) & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_Y_BAD_H); + writel(addr & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_Y_BAD_L); + + /* SAD = BAD */ + writel((addr >> 16) & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_Y_SAD_H); + writel(addr & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_Y_SAD_L); + + /* Program UV buffer address... Hardcoded to be contiguous! */ + if ((informat->code == V4L2_MBUS_FMT_UYVY8_1X16) && + (outformat->code == V4L2_MBUS_FMT_YUYV8_1_5X8)) { + u32 c_addr = addr + (resizer->video_out.bpl_value * + (outformat->height - 1)); + + /* Ensure Y_BAD_L[6:0] = C_BAD_L[6:0]*/ + if ((c_addr ^ addr) & 0x7f) { + c_addr &= ~0x7f; + c_addr += 0x80; + c_addr |= addr & 0x7f; + } + + /* Save address splitted in Base Address H & L */ + writel((c_addr >> 16) & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_C_BAD_H); + writel(c_addr & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_C_BAD_L); + + /* SAD = BAD */ + writel((c_addr >> 16) & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_C_SAD_H); + writel(c_addr & 0xffff, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_C_SAD_L); + } +} + +static void resizer_configure(struct iss_resizer_device *resizer) +{ + struct iss_device *iss = to_iss_device(resizer); + struct v4l2_mbus_framefmt *informat, *outformat; + + informat = &resizer->formats[RESIZER_PAD_SINK]; + outformat = &resizer->formats[RESIZER_PAD_SOURCE_MEM]; + + /* Make sure we don't bypass the resizer */ + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_FMT0) & + ~RSZ_SRC_FMT0_BYPASS, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_FMT0); + + /* Select RSZ input */ + writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_FMT0) & + ~RSZ_SRC_FMT0_SEL) | + (resizer->input == RESIZER_INPUT_IPIPEIF) ? RSZ_SRC_FMT0_SEL : 0, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_FMT0); + + /* RSZ ignores WEN signal from IPIPE/IPIPEIF */ + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_MODE) & + ~RSZ_SRC_MODE_WRT, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_MODE); + + /* Set Resizer in free-running mode */ + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_MODE) & + ~RSZ_SRC_MODE_OST, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_MODE); + + /* Init Resizer A */ + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_MODE) & + ~RZA_MODE_ONE_SHOT, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_MODE); + + /* Set size related things now */ + writel(0, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_VPS); + writel(0, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_HPS); + writel(informat->height - 2, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_VSZ); + writel(informat->width - 1, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SRC_HSZ); + + writel(0, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_I_VPS); + writel(0, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_I_HPS); + + writel(outformat->height - 2, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_O_VSZ); + writel(outformat->width - 1, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_O_HSZ); + + writel(0x100, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_V_DIF); + writel(0x100, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_H_DIF); + + /* Buffer output settings */ + writel(0, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_Y_PTR_S); + writel(outformat->height - 1, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_Y_PTR_E); + + writel(resizer->video_out.bpl_value, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_Y_OFT); + + /* UYVY -> NV12 conversion */ + if ((informat->code == V4L2_MBUS_FMT_UYVY8_1X16) && + (outformat->code == V4L2_MBUS_FMT_YUYV8_1_5X8)) { + writel(RSZ_420_CEN | RSZ_420_YEN, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_420); + + /* UV Buffer output settings */ + writel(0, iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_C_PTR_S); + writel(outformat->height - 1, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_C_PTR_E); + + writel(resizer->video_out.bpl_value, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_SDR_C_OFT); + } else { + writel(0, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_420); + } + + omap4iss_isp_enable_interrupts(iss); +} + +/* ----------------------------------------------------------------------------- + * Interrupt handling + */ + +static void resizer_isr_buffer(struct iss_resizer_device *resizer) +{ + struct iss_device *iss = to_iss_device(resizer); + struct iss_buffer *buffer; + + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_EN) & + ~RSZ_EN_EN, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_EN); + + buffer = omap4iss_video_buffer_next(&resizer->video_out); + if (buffer == NULL) + return; + + resizer_set_outaddr(resizer, buffer->iss_addr); + + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_EN) | + RSZ_EN_EN, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RZA_EN); +} + +/* + * resizer_isif0_isr - Handle ISIF0 event + * @resizer: Pointer to ISP RESIZER device. + * + * Executes LSC deferred enablement before next frame starts. + */ +static void resizer_int_dma_isr(struct iss_resizer_device *resizer) +{ + struct iss_pipeline *pipe = + to_iss_pipeline(&resizer->subdev.entity); + if (pipe->do_propagation) + atomic_inc(&pipe->frame_number); + + resizer_isr_buffer(resizer); +} + +/* + * omap4iss_resizer_isr - Configure resizer during interframe time. + * @resizer: Pointer to ISP RESIZER device. + * @events: RESIZER events + */ +void omap4iss_resizer_isr(struct iss_resizer_device *resizer, u32 events) +{ + struct iss_device *iss = to_iss_device(resizer); + struct iss_pipeline *pipe = + to_iss_pipeline(&resizer->subdev.entity); + + if (events & (ISP5_IRQ_RSZ_FIFO_IN_BLK | + ISP5_IRQ_RSZ_FIFO_OVF)) { + dev_dbg(iss->dev, "RSZ Err:" + " FIFO_IN_BLK:%d," + " FIFO_OVF:%d," + "\n", + (events & + ISP5_IRQ_RSZ_FIFO_IN_BLK) ? 1 : 0, + (events & + ISP5_IRQ_RSZ_FIFO_OVF) ? 1 : 0); + pipe->error = true; + } + + if (omap4iss_module_sync_is_stopping(&resizer->wait, &resizer->stopping)) + return; + + if (events & ISP5_IRQ_RSZ_INT_DMA) + resizer_int_dma_isr(resizer); +} + +/* ----------------------------------------------------------------------------- + * ISS video operations + */ + +static int resizer_video_queue(struct iss_video *video, struct iss_buffer *buffer) +{ + struct iss_resizer_device *resizer = container_of(video, + struct iss_resizer_device, video_out); + + if (!(resizer->output & RESIZER_OUTPUT_MEMORY)) + return -ENODEV; + + resizer_set_outaddr(resizer, buffer->iss_addr); + + /* + * If streaming was enabled before there was a buffer queued + * or underrun happened in the ISR, the hardware was not enabled + * and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set. + * Enable it now. + */ + if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) { + resizer_enable(resizer, 1); + iss_video_dmaqueue_flags_clr(video); + } + + return 0; +} + +static const struct iss_video_operations resizer_video_ops = { + .queue = resizer_video_queue, +}; + +/* ----------------------------------------------------------------------------- + * V4L2 subdev operations + */ + +/* + * resizer_set_stream - Enable/Disable streaming on the RESIZER module + * @sd: ISP RESIZER V4L2 subdevice + * @enable: Enable/disable stream + */ +static int resizer_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); + struct iss_device *iss = to_iss_device(resizer); + struct iss_video *video_out = &resizer->video_out; + int ret = 0; + + if (resizer->state == ISS_PIPELINE_STREAM_STOPPED) { + if (enable == ISS_PIPELINE_STREAM_STOPPED) + return 0; + + omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ); + + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_MMR) | + RSZ_GCK_MMR_MMR, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_MMR); + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_SDR) | + RSZ_GCK_SDR_CORE, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_SDR); + + /* FIXME: Enable RSZB also */ + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SYSCONFIG) | + RSZ_SYSCONFIG_RSZA_CLK_EN, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SYSCONFIG); + } + + switch (enable) { + case ISS_PIPELINE_STREAM_CONTINUOUS: + + resizer_configure(resizer); + resizer_print_status(resizer); + + /* + * When outputting to memory with no buffer available, let the + * buffer queue handler start the hardware. A DMA queue flag + * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is + * a buffer available. + */ + if (resizer->output & RESIZER_OUTPUT_MEMORY && + !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED)) + break; + + atomic_set(&resizer->stopping, 0); + resizer_enable(resizer, 1); + iss_video_dmaqueue_flags_clr(video_out); + break; + + case ISS_PIPELINE_STREAM_STOPPED: + if (resizer->state == ISS_PIPELINE_STREAM_STOPPED) + return 0; + if (omap4iss_module_sync_idle(&sd->entity, &resizer->wait, + &resizer->stopping)) + dev_dbg(iss->dev, "%s: module stop timeout.\n", + sd->name); + + resizer_enable(resizer, 0); + omap4iss_isp_disable_interrupts(iss); + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SYSCONFIG) & + ~RSZ_SYSCONFIG_RSZA_CLK_EN, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_SYSCONFIG); + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_SDR) & + ~RSZ_GCK_SDR_CORE, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_SDR); + writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_MMR) & + ~RSZ_GCK_MMR_MMR, + iss->regs[OMAP4_ISS_MEM_ISP_RESIZER] + RSZ_GCK_MMR); + omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_RSZ); + iss_video_dmaqueue_flags_clr(video_out); + break; + } + + resizer->state = enable; + return ret; +} + +static struct v4l2_mbus_framefmt * +__resizer_get_format(struct iss_resizer_device *resizer, struct v4l2_subdev_fh *fh, + unsigned int pad, enum v4l2_subdev_format_whence which) +{ + if (which == V4L2_SUBDEV_FORMAT_TRY) + return v4l2_subdev_get_try_format(fh, pad); + else + return &resizer->formats[pad]; +} + +/* + * resizer_try_format - Try video format on a pad + * @resizer: ISS RESIZER device + * @fh : V4L2 subdev file handle + * @pad: Pad number + * @fmt: Format + */ +static void +resizer_try_format(struct iss_resizer_device *resizer, struct v4l2_subdev_fh *fh, + unsigned int pad, struct v4l2_mbus_framefmt *fmt, + enum v4l2_subdev_format_whence which) +{ + enum v4l2_mbus_pixelcode pixelcode; + struct v4l2_mbus_framefmt *format; + unsigned int width = fmt->width; + unsigned int height = fmt->height; + unsigned int i; + + switch (pad) { + case RESIZER_PAD_SINK: + for (i = 0; i < ARRAY_SIZE(resizer_fmts); i++) { + if (fmt->code == resizer_fmts[i]) + break; + } + + /* If not found, use UYVY as default */ + if (i >= ARRAY_SIZE(resizer_fmts)) + fmt->code = V4L2_MBUS_FMT_UYVY8_1X16; + + /* Clamp the input size. */ + fmt->width = clamp_t(u32, width, 1, 8192); + fmt->height = clamp_t(u32, height, 1, 8192); + break; + + case RESIZER_PAD_SOURCE_MEM: + pixelcode = fmt->code; + format = __resizer_get_format(resizer, fh, RESIZER_PAD_SINK, which); + memcpy(fmt, format, sizeof(*fmt)); + + if ((pixelcode == V4L2_MBUS_FMT_YUYV8_1_5X8) && + (fmt->code == V4L2_MBUS_FMT_UYVY8_1X16)) + fmt->code = pixelcode; + + /* The data formatter truncates the number of horizontal output + * pixels to a multiple of 16. To avoid clipping data, allow + * callers to request an output size bigger than the input size + * up to the nearest multiple of 16. + */ + fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15); + fmt->width &= ~15; + fmt->height = clamp_t(u32, height, 32, fmt->height); + break; + + } + + fmt->colorspace = V4L2_COLORSPACE_JPEG; + fmt->field = V4L2_FIELD_NONE; +} + +/* + * resizer_enum_mbus_code - Handle pixel format enumeration + * @sd : pointer to v4l2 subdev structure + * @fh : V4L2 subdev file handle + * @code : pointer to v4l2_subdev_mbus_code_enum structure + * return -EINVAL or zero on success + */ +static int resizer_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt *format; + + switch (code->pad) { + case RESIZER_PAD_SINK: + if (code->index >= ARRAY_SIZE(resizer_fmts)) + return -EINVAL; + + code->code = resizer_fmts[code->index]; + break; + + case RESIZER_PAD_SOURCE_MEM: + format = __resizer_get_format(resizer, fh, RESIZER_PAD_SINK, + V4L2_SUBDEV_FORMAT_TRY); + + if (code->index == 0) { + code->code = format->code; + break; + } + + switch (format->code) { + case V4L2_MBUS_FMT_UYVY8_1X16: + if (code->index == 1) + code->code = V4L2_MBUS_FMT_YUYV8_1_5X8; + else + return -EINVAL; + break; + default: + if (code->index != 0) + return -EINVAL; + } + + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int resizer_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_fh *fh, + struct v4l2_subdev_frame_size_enum *fse) +{ + struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt format; + + if (fse->index != 0) + return -EINVAL; + + format.code = fse->code; + format.width = 1; + format.height = 1; + resizer_try_format(resizer, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY); + fse->min_width = format.width; + fse->min_height = format.height; + + if (format.code != fse->code) + return -EINVAL; + + format.code = fse->code; + format.width = -1; + format.height = -1; + resizer_try_format(resizer, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY); + fse->max_width = format.width; + fse->max_height = format.height; + + return 0; +} + +/* + * resizer_get_format - Retrieve the video format on a pad + * @sd : ISP RESIZER V4L2 subdevice + * @fh : V4L2 subdev file handle + * @fmt: Format + * + * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond + * to the format type. + */ +static int resizer_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt *format; + + format = __resizer_get_format(resizer, fh, fmt->pad, fmt->which); + if (format == NULL) + return -EINVAL; + + fmt->format = *format; + return 0; +} + +/* + * resizer_set_format - Set the video format on a pad + * @sd : ISP RESIZER V4L2 subdevice + * @fh : V4L2 subdev file handle + * @fmt: Format + * + * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond + * to the format type. + */ +static int resizer_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, + struct v4l2_subdev_format *fmt) +{ + struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); + struct v4l2_mbus_framefmt *format; + + format = __resizer_get_format(resizer, fh, fmt->pad, fmt->which); + if (format == NULL) + return -EINVAL; + + resizer_try_format(resizer, fh, fmt->pad, &fmt->format, fmt->which); + *format = fmt->format; + + /* Propagate the format from sink to source */ + if (fmt->pad == RESIZER_PAD_SINK) { + format = __resizer_get_format(resizer, fh, RESIZER_PAD_SOURCE_MEM, + fmt->which); + *format = fmt->format; + resizer_try_format(resizer, fh, RESIZER_PAD_SOURCE_MEM, format, + fmt->which); + } + + return 0; +} + +static int resizer_link_validate(struct v4l2_subdev *sd, struct media_link *link, + struct v4l2_subdev_format *source_fmt, + struct v4l2_subdev_format *sink_fmt) +{ + /* Check if the two ends match */ + if (source_fmt->format.width != sink_fmt->format.width || + source_fmt->format.height != sink_fmt->format.height) + return -EPIPE; + + if (source_fmt->format.code != sink_fmt->format.code) + return -EPIPE; + + return 0; +} + +/* + * resizer_init_formats - Initialize formats on all pads + * @sd: ISP RESIZER V4L2 subdevice + * @fh: V4L2 subdev file handle + * + * Initialize all pad formats with default values. If fh is not NULL, try + * formats are initialized on the file handle. Otherwise active formats are + * initialized on the device. + */ +static int resizer_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct v4l2_subdev_format format; + + memset(&format, 0, sizeof(format)); + format.pad = RESIZER_PAD_SINK; + format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; + format.format.code = V4L2_MBUS_FMT_UYVY8_1X16; + format.format.width = 4096; + format.format.height = 4096; + resizer_set_format(sd, fh, &format); + + return 0; +} + +/* V4L2 subdev video operations */ +static const struct v4l2_subdev_video_ops resizer_v4l2_video_ops = { + .s_stream = resizer_set_stream, +}; + +/* V4L2 subdev pad operations */ +static const struct v4l2_subdev_pad_ops resizer_v4l2_pad_ops = { + .enum_mbus_code = resizer_enum_mbus_code, + .enum_frame_size = resizer_enum_frame_size, + .get_fmt = resizer_get_format, + .set_fmt = resizer_set_format, + .link_validate = resizer_link_validate, +}; + +/* V4L2 subdev operations */ +static const struct v4l2_subdev_ops resizer_v4l2_ops = { + .video = &resizer_v4l2_video_ops, + .pad = &resizer_v4l2_pad_ops, +}; + +/* V4L2 subdev internal operations */ +static const struct v4l2_subdev_internal_ops resizer_v4l2_internal_ops = { + .open = resizer_init_formats, +}; + +/* ----------------------------------------------------------------------------- + * Media entity operations + */ + +/* + * resizer_link_setup - Setup RESIZER connections + * @entity: RESIZER media entity + * @local: Pad at the local end of the link + * @remote: Pad at the remote end of the link + * @flags: Link flags + * + * return -EINVAL or zero on success + */ +static int resizer_link_setup(struct media_entity *entity, + const struct media_pad *local, + const struct media_pad *remote, u32 flags) +{ + struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); + struct iss_resizer_device *resizer = v4l2_get_subdevdata(sd); + struct iss_device *iss = to_iss_device(resizer); + + switch (local->index | media_entity_type(remote->entity)) { + case RESIZER_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV: + /* Read from IPIPE or IPIPEIF. */ + if (!(flags & MEDIA_LNK_FL_ENABLED)) { + resizer->input = RESIZER_INPUT_NONE; + break; + } + + if (resizer->input != RESIZER_INPUT_NONE) + return -EBUSY; + + if (remote->entity == &iss->ipipeif.subdev.entity) + resizer->input = RESIZER_INPUT_IPIPEIF; + else if (remote->entity == &iss->ipipe.subdev.entity) + resizer->input = RESIZER_INPUT_IPIPE; + + + break; + + case RESIZER_PAD_SOURCE_MEM | MEDIA_ENT_T_DEVNODE: + /* Write to memory */ + if (flags & MEDIA_LNK_FL_ENABLED) { + if (resizer->output & ~RESIZER_OUTPUT_MEMORY) + return -EBUSY; + resizer->output |= RESIZER_OUTPUT_MEMORY; + } else { + resizer->output &= ~RESIZER_OUTPUT_MEMORY; + } + break; + + default: + return -EINVAL; + } + + return 0; +} + +/* media operations */ +static const struct media_entity_operations resizer_media_ops = { + .link_setup = resizer_link_setup, + .link_validate = v4l2_subdev_link_validate, +}; + +/* + * resizer_init_entities - Initialize V4L2 subdev and media entity + * @resizer: ISS ISP RESIZER module + * + * Return 0 on success and a negative error code on failure. + */ +static int resizer_init_entities(struct iss_resizer_device *resizer) +{ + struct v4l2_subdev *sd = &resizer->subdev; + struct media_pad *pads = resizer->pads; + struct media_entity *me = &sd->entity; + int ret; + + resizer->input = RESIZER_INPUT_NONE; + + v4l2_subdev_init(sd, &resizer_v4l2_ops); + sd->internal_ops = &resizer_v4l2_internal_ops; + strlcpy(sd->name, "OMAP4 ISS ISP resizer", sizeof(sd->name)); + sd->grp_id = 1 << 16; /* group ID for iss subdevs */ + v4l2_set_subdevdata(sd, resizer); + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + pads[RESIZER_PAD_SINK].flags = MEDIA_PAD_FL_SINK; + pads[RESIZER_PAD_SOURCE_MEM].flags = MEDIA_PAD_FL_SOURCE; + + me->ops = &resizer_media_ops; + ret = media_entity_init(me, RESIZER_PADS_NUM, pads, 0); + if (ret < 0) + return ret; + + resizer_init_formats(sd, NULL); + + resizer->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + resizer->video_out.ops = &resizer_video_ops; + resizer->video_out.iss = to_iss_device(resizer); + resizer->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3; + resizer->video_out.bpl_alignment = 32; + resizer->video_out.bpl_zero_padding = 1; + resizer->video_out.bpl_max = 0x1ffe0; + + ret = omap4iss_video_init(&resizer->video_out, "ISP resizer a"); + if (ret < 0) + return ret; + + /* Connect the RESIZER subdev to the video node. */ + ret = media_entity_create_link(&resizer->subdev.entity, RESIZER_PAD_SOURCE_MEM, + &resizer->video_out.video.entity, 0, 0); + if (ret < 0) + return ret; + + return 0; +} + +void omap4iss_resizer_unregister_entities(struct iss_resizer_device *resizer) +{ + media_entity_cleanup(&resizer->subdev.entity); + + v4l2_device_unregister_subdev(&resizer->subdev); + omap4iss_video_unregister(&resizer->video_out); +} + +int omap4iss_resizer_register_entities(struct iss_resizer_device *resizer, + struct v4l2_device *vdev) +{ + int ret; + + /* Register the subdev and video node. */ + ret = v4l2_device_register_subdev(vdev, &resizer->subdev); + if (ret < 0) + goto error; + + ret = omap4iss_video_register(&resizer->video_out, vdev); + if (ret < 0) + goto error; + + return 0; + +error: + omap4iss_resizer_unregister_entities(resizer); + return ret; +} + +/* ----------------------------------------------------------------------------- + * ISP RESIZER initialisation and cleanup + */ + +/* + * omap4iss_resizer_init - RESIZER module initialization. + * @iss: Device pointer specific to the OMAP4 ISS. + * + * TODO: Get the initialisation values from platform data. + * + * Return 0 on success or a negative error code otherwise. + */ +int omap4iss_resizer_init(struct iss_device *iss) +{ + struct iss_resizer_device *resizer = &iss->resizer; + + resizer->state = ISS_PIPELINE_STREAM_STOPPED; + init_waitqueue_head(&resizer->wait); + + return resizer_init_entities(resizer); +} + +/* + * omap4iss_resizer_cleanup - RESIZER module cleanup. + * @iss: Device pointer specific to the OMAP4 ISS. + */ +void omap4iss_resizer_cleanup(struct iss_device *iss) +{ + /* FIXME: are you sure there's nothing to do? */ +} diff --git a/drivers/staging/media/omap4iss/iss_resizer.h b/drivers/staging/media/omap4iss/iss_resizer.h new file mode 100644 index 0000000..3727498 --- /dev/null +++ b/drivers/staging/media/omap4iss/iss_resizer.h @@ -0,0 +1,75 @@ +/* + * TI OMAP4 ISS V4L2 Driver - ISP RESIZER module + * + * Copyright (C) 2012 Texas Instruments, Inc. + * + * Author: Sergio Aguirre + * + * 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. + */ + +#ifndef OMAP4_ISS_RESIZER_H +#define OMAP4_ISS_RESIZER_H + +#include "iss_video.h" + +enum resizer_input_entity { + RESIZER_INPUT_NONE, + RESIZER_INPUT_IPIPE, + RESIZER_INPUT_IPIPEIF +}; + +#define RESIZER_OUTPUT_MEMORY (1 << 0) + +/* Sink and source RESIZER pads */ +#define RESIZER_PAD_SINK 0 +#define RESIZER_PAD_SOURCE_MEM 1 +#define RESIZER_PADS_NUM 2 + +/* + * struct iss_resizer_device - Structure for the RESIZER module to store its own + * information + * @subdev: V4L2 subdevice + * @pads: Sink and source media entity pads + * @formats: Active video formats + * @input: Active input + * @output: Active outputs + * @video_out: Output video node + * @error: A hardware error occurred during capture + * @state: Streaming state + * @wait: Wait queue used to stop the module + * @stopping: Stopping state + */ +struct iss_resizer_device { + struct v4l2_subdev subdev; + struct media_pad pads[RESIZER_PADS_NUM]; + struct v4l2_mbus_framefmt formats[RESIZER_PADS_NUM]; + + enum resizer_input_entity input; + unsigned int output; + struct iss_video video_out; + unsigned int error; + + enum iss_pipeline_stream_state state; + wait_queue_head_t wait; + atomic_t stopping; +}; + +struct iss_device; + +int omap4iss_resizer_init(struct iss_device *iss); +void omap4iss_resizer_cleanup(struct iss_device *iss); +int omap4iss_resizer_register_entities(struct iss_resizer_device *resizer, + struct v4l2_device *vdev); +void omap4iss_resizer_unregister_entities(struct iss_resizer_device *resizer); + +int omap4iss_resizer_busy(struct iss_resizer_device *resizer); +void omap4iss_resizer_isr(struct iss_resizer_device *resizer, u32 events); +void omap4iss_resizer_restore_context(struct iss_device *iss); +void omap4iss_resizer_max_rate(struct iss_resizer_device *resizer, + unsigned int *max_rate); + +#endif /* OMAP4_ISS_RESIZER_H */ -- 2.7.4