[PATCH 5/6] v4l: omap4iss: Add support for OMAP4 camera interface - Resizer
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Wed Oct 2 23:55:32 UTC 2013
From: Sergio Aguirre <sergio.a.aguirre at gmail.com>
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.
Signed-off-by: Sergio Aguirre <sergio.a.aguirre at gmail.com>
[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: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
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 <sergio.a.aguirre at gmail.com>
+ *
+ * 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/uaccess.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#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 <sergio.a.aguirre at gmail.com>
+ *
+ * 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 */
--
1.8.1.5
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