Hi Mikhail, > From: linux-media-owner@xxxxxxxxxxxxxxx [mailto:linux-media- > owner@xxxxxxxxxxxxxxx] On Behalf Of Mikhail Ulyanov > Sent: Monday, August 25, 2014 2:30 PM > > This patch contains driver for Renesas R-Car JPEG codec. > > Cnanges since v1: > - s/g_fmt function simplified > - default format for queues added > - dumb vidioc functions added to be in compliance with standard > api: > jpu_s_priority, jpu_g_priority > - standard v4l2_ctrl_subscribe_event and v4l2_event_unsubscribe > now in use by the same reason The patch looks good to me. However, I would suggest using the BIT macro and making some short functions inline. > Signed-off-by: Mikhail Ulyanov <mikhail.ulyanov@xxxxxxxxxxxxxxxxxx> > --- > drivers/media/platform/Kconfig | 11 + > drivers/media/platform/Makefile | 2 + > drivers/media/platform/jpu.c | 1628 > ++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 1641 insertions(+) > create mode 100644 drivers/media/platform/jpu.c > > diff --git a/drivers/media/platform/Kconfig > b/drivers/media/platform/Kconfig index 6d86646..1b8c846 100644 > --- a/drivers/media/platform/Kconfig > +++ b/drivers/media/platform/Kconfig > @@ -220,6 +220,17 @@ config VIDEO_RENESAS_VSP1 > To compile this driver as a module, choose M here: the module > will be called vsp1. > > +config VIDEO_RENESAS_JPU > + tristate "Renesas JPEG Processing Unit" > + depends on VIDEO_DEV && VIDEO_V4L2 > + select VIDEOBUF2_DMA_CONTIG > + select V4L2_MEM2MEM_DEV > + ---help--- > + This is a V4L2 driver for the Renesas JPEG Processing Unit. > + > + To compile this driver as a module, choose M here: the module > + will be called jpu. > + > config VIDEO_TI_VPE > tristate "TI VPE (Video Processing Engine) driver" > depends on VIDEO_DEV && VIDEO_V4L2 && SOC_DRA7XX diff --git > a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile > index e5269da..e438534 100644 > --- a/drivers/media/platform/Makefile > +++ b/drivers/media/platform/Makefile > @@ -47,6 +47,8 @@ obj-$(CONFIG_SOC_CAMERA) += soc_camera/ > > obj-$(CONFIG_VIDEO_RENESAS_VSP1) += vsp1/ > > +obj-$(CONFIG_VIDEO_RENESAS_JPU) += jpu.o > + > obj-y += davinci/ > > obj-$(CONFIG_ARCH_OMAP) += omap/ > diff --git a/drivers/media/platform/jpu.c > b/drivers/media/platform/jpu.c new file mode 100644 index > 0000000..da70491 > --- /dev/null > +++ b/drivers/media/platform/jpu.c > @@ -0,0 +1,1628 @@ > +/* > + * Author: Mikhail Ulyanov <source@xxxxxxxxxxxxxxxxxx> > + * Copyright (C) 2014 Cogent Embedded, Inc. > + * Copyright (C) 2014 Renesas Electronics Corporation > + * > + * This is based on the drivers/media/platform/s5p-jpu driver by > + * Andrzej Pietrasiewicz and Jacek Anaszewski. > + * > + * 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. > + */ > + > +#include <linux/clk.h> > +#include <linux/err.h> > +#include <linux/gfp.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_device.h> > +#include <linux/platform_device.h> > +#include <linux/slab.h> > +#include <linux/spinlock.h> > +#include <linux/string.h> > +#include <linux/videodev2.h> > +#include <media/v4l2-ctrls.h> > +#include <media/v4l2-device.h> > +#include <media/v4l2-event.h> > +#include <media/v4l2-fh.h> > +#include <media/v4l2-mem2mem.h> > +#include <media/v4l2-ioctl.h> > +#include <media/videobuf2-core.h> > +#include <media/videobuf2-dma-contig.h> > + > + > +#define JPU_M2M_NAME "jpu" > + > +#define JPU_WIDTH_MIN 16 > +#define JPU_HEIGHT_MIN 16 > +#define JPU_WIDTH_MAX 4096 > +#define JPU_HEIGHT_MAX 4096 > +#define JPU_DEFAULT_WIDTH 640 > +#define JPU_DEFAULT_HEIGHT 480 > + > +#define JPU_ENCODE 0 > +#define JPU_DECODE 1 > + > +/* Flags that indicate a format can be used for capture/output */ > +#define JPU_FMT_TYPE_OUTPUT 0 > +#define JPU_FMT_TYPE_CAPTURE 1 > +#define JPU_ENC_CAPTURE (1 << 0) > +#define JPU_ENC_OUTPUT (1 << 1) > +#define JPU_DEC_CAPTURE (1 << 2) > +#define JPU_DEC_OUTPUT (1 << 3) The BIT macro could be used here. > + > +/* > + * JPEG registers and bits > + */ > + > +/* JPEG code mode register */ > +#define JCMOD 0x00 > +#define JCMOD_SOI_DISABLE (1 << 8) > +#define JCMOD_SOI_ENABLE (0 << 8) > +#define JCMOD_PCTR (1 << 7) > +#define JCMOD_MSKIP_DISABLE (0 << 5) > +#define JCMOD_MSKIP_ENABLE (1 << 5) > +#define JCMOD_DSP_ENC (0 << 3) > +#define JCMOD_DSP_DEC (1 << 3) > +#define JCMOD_REDU (7 << 0) > +#define JCMOD_REDU_422 (1 << 0) > +#define JCMOD_REDU_420 (2 << 0) > + > +/* JPEG code command register */ > +#define JCCMD 0x04 > +#define JCCMD_SRST (1 << 12) > +#define JCCMD_BRST (1 << 7) > +#define JCCMD_JEND (1 << 2) > +#define JCCMD_JSRT (1 << 0) > + > +/* JPEG code quantanization table number register */ > +#define JCQTN 0x0C > +#define JCQTN_SHIFT(t) (((t) - 1) << 1) > + > +/* JPEG code Huffman table number register */ > +#define JCHTN 0x10 > +#define JCHTN_AC_SHIFT(t) (((t) << 1) - 1) > +#define JCHTN_DC_SHIFT(t) (((t) - 1) << 1) > + [snip] > = > +===== > + * video ioctl operations > + * > +====================================================================== > = > +===== > + */ > +static void put_byte(unsigned long *p, u8 v) { > + u8 *addr = (u8 *)*p; > + > + *addr = v; > + (*p)++; > +} > + > +static void put_short_be(unsigned long *p, u16 v) { > + u16 *addr = (u16 *)*p; > + > + *addr = cpu_to_be16(v); > + *p += 2; > +} > + > +static void put_word_be(unsigned long *p, u32 v) { > + u32 *addr = (u32 *)*p; > + > + *addr = cpu_to_be32(v); > + *p += 4; > +} The 3 above function could be inline. > + > +static void put_blob_byte(unsigned long *p, const unsigned char *blob, > + unsigned int len) > +{ > + int i; > + > + for (i = 0; i < len; i++) > + put_byte(p, blob[i]); > +} I think this function could also be inline. > + > +static void put_qtbl(unsigned long *p, unsigned char id, > + const unsigned int *qtbl) > +{ > + int i; > + > + put_byte(p, id); > + for (i = 0; i < ARRAY_SIZE(zigzag); i++) > + put_byte(p, *((u8 *)qtbl + zigzag[i])); } > + > +static void put_htbl(unsigned long *p, unsigned char tc, > + const unsigned int *htbl, unsigned int len) { > + int i; > + > + put_byte(p, tc); > + for (i = 0; i < len; i++) > + put_word_be(p, htbl[i]); > +} > + [snip] Best wishes, -- Kamil Debski Samsung R&D Institute Poland -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
