Re: [PATCH v2 5/5] drivers: media: platform: Add NPCM Video Capture/Encode Engine driver
From: Paul Menzel
Date: Fri May 13 2022 - 01:46:51 EST
Dear Marvin,
Thank you for the patch.
Am 13.05.22 um 05:34 schrieb Marvin Lin:
Add driver for Video Capture/Differentiation Engine (VCD) and Encoding
Compression Engine (ECE) present on Nuvoton NPCM SoCs.
Please mention the datasheet name and revision used to implement this?
How can your patch be tested?
For a over 2000 line patch, I would expect a longer commit message with
a summary of the hardware features, and implementation.
As the module author should you also be added to the file `MAINTAINERS`?
(Maybe even with a functional address <linux-npcm-video@xxxxxxxxxxx>?
Signed-off-by: Marvin Lin <kflin@xxxxxxxxxxx>
Same comment as in 1/5 regarding the author email address.
---
drivers/media/platform/Kconfig | 1 +
drivers/media/platform/Makefile | 1 +
drivers/media/platform/nuvoton/Kconfig | 12 +
drivers/media/platform/nuvoton/Makefile | 2 +
drivers/media/platform/nuvoton/npcm-video.c | 2074 +++++++++++++++++++
5 files changed, 2090 insertions(+)
create mode 100644 drivers/media/platform/nuvoton/Kconfig
create mode 100644 drivers/media/platform/nuvoton/Makefile
create mode 100644 drivers/media/platform/nuvoton/npcm-video.c
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index f1056ceaf5a8..21daeedb47c9 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -72,6 +72,7 @@ source "drivers/media/platform/chips-media/Kconfig"
source "drivers/media/platform/intel/Kconfig"
source "drivers/media/platform/marvell/Kconfig"
source "drivers/media/platform/mediatek/Kconfig"
+source "drivers/media/platform/nuvoton/Kconfig"
source "drivers/media/platform/nvidia/Kconfig"
source "drivers/media/platform/nxp/Kconfig"
source "drivers/media/platform/qcom/Kconfig"
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index a881e97bae95..4a1da16c4f8a 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -15,6 +15,7 @@ obj-y += chips-media/
obj-y += intel/
obj-y += marvell/
obj-y += mediatek/
+obj-y += nuvoton/
obj-y += nvidia/
obj-y += nxp/
obj-y += qcom/
diff --git a/drivers/media/platform/nuvoton/Kconfig b/drivers/media/platform/nuvoton/Kconfig
new file mode 100644
index 000000000000..8718631b0424
--- /dev/null
+++ b/drivers/media/platform/nuvoton/Kconfig
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+comment "Nuvoton media platform drivers"
+
+config VIDEO_NUVOTON
Is that driver going to support all Nuvoton devices or just NPCM? If
only NPCM, that should be part of the Kconfig config name?
+ tristate "Nuvoton NPCM Video Capture/Encode Engine driver"
+ depends on V4L_PLATFORM_DRIVERS
+ depends on VIDEO_DEV
+ select VIDEOBUF2_DMA_CONTIG
+ help
+ Support for the Video Capture/Differentiation Engine (VCD) and
+ Encoding Compression Engine (ECE) present on Nuvoton NPCM SoCs.
Mention the module name?
> To compile this driver as a module, choose M here: the module will be
called XXX.
diff --git a/drivers/media/platform/nuvoton/Makefile b/drivers/media/platform/nuvoton/Makefile
new file mode 100644
index 000000000000..63041bb526a9
--- /dev/null
+++ b/drivers/media/platform/nuvoton/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_VIDEO_NUVOTON) += npcm-video.o
diff --git a/drivers/media/platform/nuvoton/npcm-video.c b/drivers/media/platform/nuvoton/npcm-video.c
new file mode 100644
index 000000000000..4ed5290f4c5d
--- /dev/null
+++ b/drivers/media/platform/nuvoton/npcm-video.c
@@ -0,0 +1,2074 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Video Capture/Differentiation Engine (VCD) and Encoding
+ * Compression Engine (ECE) present on Nuvoton NPCM SoCs.
+ *
+ * Copyright (C) 2022 Nuvoton Technologies
+ */
+
+#include <linux/atomic.h>
+#include <linux/bitfield.h>
+#include <linux/bitmap.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/v4l2-controls.h>
+#include <linux/videodev2.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dv-timings.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
+
+#define DEVICE_NAME "nuvoton-video"
+
+#define MAX_FRAME_RATE 60
+#define MAX_WIDTH 1920
+#define MAX_HEIGHT 1200
+#define MIN_WIDTH 320
+#define MIN_HEIGHT 240
+#define MIN_LP 512
+#define MAX_LP 4096
+#define RECT_W 16
+#define RECT_H 16
+#define BITMAP_SIZE 32
+
+#define VCD_MODULE_NAME "vcd"
+#define ECE_MODULE_NAME "ece"
+
+/* VCD Registers */
+#define VCD_DIFF_TBL 0x0000
+#define VCD_FBA_ADR 0x8000
+#define VCD_FBB_ADR 0x8004
+
+#define VCD_FB_LP 0x8008
+#define VCD_FBA_LP GENMASK(15, 0)
+#define VCD_FBB_LP GENMASK(31, 16)
+
+#define VCD_CAP_RES 0x800c
+#define VCD_CAP_RES_VERT_RES GENMASK(10, 0)
+#define VCD_CAP_RES_HOR_RES GENMASK(26, 16)
+
+#define VCD_MODE 0x8014
+#define VCD_MODE_VCDE BIT(0)
+#define VCD_MODE_CM565 BIT(1)
+#define VCD_MODE_IDBC BIT(3)
+#define VCD_MODE_COLOR_CNVRT GENMASK(5, 4)
+#define VCD_MODE_COLOR_CNVRT_NO_CNVRT 0
+#define VCD_MODE_COLOR_CNVRT_RGB_222 1
+#define VCD_MODE_COLOR_CNVRT_666_MODE 2
+#define VCD_MODE_COLOR_CNVRT_RGB_888 3
+#define VCD_MODE_KVM_BW_SET BIT(16)
+
+#define VCD_CMD 0x8018
+#define VCD_CMD_GO BIT(0)
+#define VCD_CMD_RST BIT(1)
+#define VCD_CMD_OPERATION GENMASK(6, 4)
+#define VCD_CMD_OPERATION_CAPTURE 0
+#define VCD_CMD_OPERATION_COMPARE 2
+
+#define VCD_STAT 0x801c
+#define VCD_STAT_DONE BIT(0)
+#define VCD_STAT_IFOT BIT(2)
+#define VCD_STAT_IFOR BIT(3)
+#define VCD_STAT_BUSY BIT(30)
+#define VCD_STAT_CLEAR 0x3fff
+
+#define VCD_INTE 0x8020
+#define VCD_INTE_DONE_IE BIT(0)
+#define VCD_INTE_IFOT_IE BIT(2)
+#define VCD_INTE_IFOR_IE BIT(3)
+
+#define VCD_RCHG 0x8028
+#define VCD_RCHG_TIM_PRSCL GENMASK(12, 9)
+
+#define VCD_FIFO 0x805c
+#define VCD_FIFO_TH 0x100350ff
+
+#define VCD_MAX_SRC_BUFFER_SIZE 0x500000 /* 1920 x 1200 x 2 bpp */
+#define VCD_KVM_BW_PCLK 120000000UL
+#define VCD_BUSY_TIMEOUT_US 50000
+
+/* ECE Registers */
+#define ECE_DDA_CTRL 0x0000
+#define ECE_DDA_CTRL_ECEEN BIT(0)
+#define ECE_DDA_CTRL_INTEN BIT(8)
+
+#define ECE_DDA_STS 0x0004
+#define ECE_DDA_STS_CDREADY BIT(8)
+#define ECE_DDA_STS_ACDRDY BIT(10)
+
+#define ECE_FBR_BA 0x0008
+#define ECE_ED_BA 0x000c
+#define ECE_RECT_XY 0x0010
+
+#define ECE_RECT_DIMEN 0x0014
+#define ECE_RECT_DIMEN_WR GENMASK(10, 0)
+#define ECE_RECT_DIMEN_WLTR GENMASK(14, 11)
+#define ECE_RECT_DIMEN_HR GENMASK(26, 16)
+#define ECE_RECT_DIMEN_HLTR GENMASK(30, 27)
+
+#define ECE_RESOL 0x001c
+#define ECE_RESOL_FB_LP_512 0
+#define ECE_RESOL_FB_LP_1024 1
+#define ECE_RESOL_FB_LP_2048 2
+#define ECE_RESOL_FB_LP_2560 3
+#define ECE_RESOL_FB_LP_4096 4
+
+#define ECE_HEX_CTRL 0x0040
+#define ECE_HEX_CTRL_ENCDIS BIT(0)
+#define ECE_HEX_CTRL_ENC_GAP GENMASK(12, 8)
+
+#define ECE_HEX_RECT_OFFSET 0x0048
+#define ECE_HEX_RECT_OFFSET_MASK GENMASK(22, 0)
+
+#define ECE_TILE_W 16
+#define ECE_TILE_H 16
+#define ECE_POLL_TIMEOUT_US 50000
+
+/* GCR Registers */
+#define INTCR 0x3c
+#define INTCR_GFXIFDIS GENMASK(9, 8)
+#define INTCR_DEHS BIT(27)
+
+#define INTCR2 0x60
+#define INTCR2_GIRST2 BIT(2)
+#define INTCR2_GIHCRST BIT(5)
+#define INTCR2_GIVCRST BIT(6)
+
+#define INTCR3 0x9c
+#define INTCR3_GMMAP GENMASK(10, 8)
+#define INTCR3_GMMAP_128MB 0
+#define INTCR3_GMMAP_256MB 1
+#define INTCR3_GMMAP_512MB 2
+#define INTCR3_GMMAP_1GB 3
+#define INTCR3_GMMAP_2GB 4
+
+#define ADDR_GMMAP_128MB 0x07000000
+#define ADDR_GMMAP_256MB 0x0f000000
+#define ADDR_GMMAP_512MB 0x1f000000
+#define ADDR_GMMAP_1GB 0x3f000000
+#define ADDR_GMMAP_2GB 0x7f000000
+
+#define GMMAP_LENGTH 0xc00000 /* Total 16MB, but 4MB preserved*/
+
+#define MFSEL1 0x0c
+#define MFSEL1_DVH1SEL BIT(27)
+
+/* GFXI Register */
+#define DISPST 0x00
+#define DISPST_HSCROFF BIT(1)
+#define DISPST_MGAMODE BIT(7)
+
+#define HVCNTL 0x10
+#define HVCNTL_MASK GENMASK(7, 0)
+
+#define HVCNTH 0x14
+#define HVCNTH_MASK GENMASK(2, 0)
+
+#define VVCNTL 0x20
+#define VVCNTL_MASK GENMASK(7, 0)
+
+#define VVCNTH 0x24
+#define VVCNTH_MASK GENMASK(2, 0)
+
+#define GPLLINDIV 0x40
+#define GPLLINDIV_MASK GENMASK(5, 0)
+#define GPLLINDIV_GPLLFBDV8 BIT(7)
+
+#define GPLLFBDIV 0x44
+#define GPLLFBDIV_MASK GENMASK(7, 0)
+
+#define GPLLST 0x48
+#define GPLLST_PLLOTDIV1 GENMASK(2, 0)
+#define GPLLST_PLLOTDIV2 GENMASK(5, 3)
+#define GPLLST_GPLLFBDV109 GENMASK(7, 6)
+
+struct nuvoton_video_addr {
+ unsigned int size;
size_t?
+ dma_addr_t dma;
+ void *virt;
+};
+
+struct nuvoton_video_buffer {
+ struct vb2_v4l2_buffer vb;
+ struct list_head link;
+};
+
+#define to_nuvoton_video_buffer(x) \
+ container_of((x), struct nuvoton_video_buffer, vb)
+
+enum {
+ VIDEO_STREAMING,
+ VIDEO_FRAME_INPRG,
+ VIDEO_STOPPED,
+};
+
+struct rect_list {
+ struct v4l2_clip clip;
+ struct list_head list;
+};
+
+struct rect_list_info {
+ struct rect_list *list;
+ struct rect_list *first;
+ struct list_head *head;
+ int index;
+ int tile_perline;
+ int tile_perrow;
+ int offset_perline;
+ int tile_size;
+ int tile_cnt;
Can all of these be unsigned?
+};
+
+struct nuvoton_ece {
+ struct regmap *regmap;
+ atomic_t clients;
+ struct reset_control *reset;
+};
+
+struct nuvoton_video {
+ struct regmap *gcr_regmap;
+ struct regmap *gfx_regmap;
+ struct regmap *vcd_regmap;
+
+ struct device *dev;
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_device v4l2_dev;
+ struct v4l2_pix_format pix_fmt;
+ struct v4l2_bt_timings active_timings;
+ struct v4l2_bt_timings detected_timings;
+ u32 v4l2_input_status;
+ struct vb2_queue queue;
+ struct video_device vdev;
+ struct mutex video_lock; /* v4l2 and videobuf2 lock */
+
+ struct list_head buffers;
+ spinlock_t lock; /* buffer list lock */
+ unsigned long flags;
+ unsigned int sequence;
+
+ unsigned int max_buffer_size;
+ struct nuvoton_video_addr src;
+ struct reset_control *reset;
+ struct nuvoton_ece ece;
+
+ int frame_rate;
+ int vb_index;
Unsigned?
+ u32 bytesperline;
+ u8 bytesperpixel;
+ u32 rect_cnt;
+ u8 num_buffers;
+ struct list_head *list;
+ u32 *rect;
I would not limit the size?
+ int ctrl_cmd;
+ int op_cmd;
+};
+
+#define to_nuvoton_video(x) container_of((x), struct nuvoton_video, v4l2_dev)
+
+static const struct v4l2_dv_timings_cap nuvoton_video_timings_cap = {
+ .type = V4L2_DV_BT_656_1120,
+ .bt = {
+ .min_width = MIN_WIDTH,
+ .max_width = MAX_WIDTH,
+ .min_height = MIN_HEIGHT,
+ .max_height = MAX_HEIGHT,
+ .min_pixelclock = 6574080, /* 640 x 480 x 24Hz */
+ .max_pixelclock = 138240000, /* 1920 x 1200 x 60Hz */
+ .standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
+ V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
+ .capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
+ V4L2_DV_BT_CAP_REDUCED_BLANKING |
+ V4L2_DV_BT_CAP_CUSTOM,
+ },
+};
+
+static DECLARE_BITMAP(bitmap, BITMAP_SIZE);
+
+static void nuvoton_video_ece_prepend_rect_header(u8 *addr, u16 x, u16 y, u16 w,
+ u16 h)
+{
+ __be16 x_pos = cpu_to_be16(x);
+ __be16 y_pos = cpu_to_be16(y);
+ __be16 width = cpu_to_be16(w);
+ __be16 height = cpu_to_be16(h);
+ __be32 encoding = cpu_to_be32(5); /* Hextile encoding */
+
+ memcpy(addr, &x_pos, 2);
+ memcpy(addr + 2, &y_pos, 2);
+ memcpy(addr + 4, &width, 2);
+ memcpy(addr + 6, &height, 2);
+ memcpy(addr + 8, &encoding, 4);
+}
+
+static u32 nuvoton_video_ece_get_ed_size(struct nuvoton_video *video,
+ u32 offset, void *addr)
Use unsigned int as return value?
+{
+ struct regmap *ece = video->ece.regmap;
+ u32 size, gap, val;
+ int ret;
+
+ ret = regmap_read_poll_timeout(ece, ECE_DDA_STS, val,
+ (val & ECE_DDA_STS_CDREADY),
+ 0, ECE_POLL_TIMEOUT_US);
+
+ if (ret) {
+ dev_warn(video->dev, "Wait for ECE_DDA_STS_CDREADY timeout\n");
+ return 0;
+ }
+
+ size = readl(addr + offset);
+
+ regmap_read(ece, ECE_HEX_CTRL, &val);
+ gap = FIELD_GET(ECE_HEX_CTRL_ENC_GAP, val);
+
+ dev_dbg(video->dev, "offset = %u, ed_size = %u, gap = %u\n", offset,
+ size, gap);
+
+ return size + gap;
+}
+
+static void nuvoton_video_ece_enc_rect(struct nuvoton_video *video, u32 r_off_x,
+ u32 r_off_y, u32 r_w, u32 r_h)
+{
+ struct regmap *ece = video->ece.regmap;
+ u32 rect_offset = (r_off_y * video->bytesperline) + (r_off_x * 2);
+ u32 temp;
+ u32 w_tile;
+ u32 h_tile;
+ u32 w_size = ECE_TILE_W;
+ u32 h_size = ECE_TILE_H;
Any reason to fix the sizes?
+
+ regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, 0);
+ regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN,
+ ECE_DDA_CTRL_ECEEN);
+ regmap_write(ece, ECE_DDA_STS, ECE_DDA_STS_CDREADY |
+ ECE_DDA_STS_ACDRDY);
+ regmap_write(ece, ECE_RECT_XY, rect_offset);
+
+ w_tile = r_w / ECE_TILE_W;
+ h_tile = r_h / ECE_TILE_H;
+
+ if (r_w % ECE_TILE_W) {
+ w_tile += 1;
+ w_size = r_w % ECE_TILE_W;
+ }
+
+ if (r_h % ECE_TILE_H || !h_tile) {
+ h_tile += 1;
+ h_size = r_h % ECE_TILE_H;
+ }
+
+ temp = FIELD_PREP(ECE_RECT_DIMEN_WLTR, w_size - 1) |
+ FIELD_PREP(ECE_RECT_DIMEN_HLTR, h_size - 1) |
+ FIELD_PREP(ECE_RECT_DIMEN_WR, w_tile - 1) |
+ FIELD_PREP(ECE_RECT_DIMEN_HR, h_tile - 1);
+
+ regmap_write(ece, ECE_RECT_DIMEN, temp);
+}
+
+static u32 nuvoton_video_ece_read_rect_offset(struct nuvoton_video *video)
+{
+ struct regmap *ece = video->ece.regmap;
+ u32 offset;
+
+ regmap_read(ece, ECE_HEX_RECT_OFFSET, &offset);
+ return FIELD_GET(ECE_HEX_RECT_OFFSET_MASK, offset);
+}
+
+/*
+ * Set the line pitch (in bytes) for the frame buffers.
+ * Can be on of those values: 512, 1024, 2048, 2560 or 4096 bytes.
+ */
+static void nuvoton_video_ece_set_lp(struct nuvoton_video *video, u32 pitch)
+{
+ u32 lp;
+ struct regmap *ece = video->ece.regmap;
+
+ switch (pitch) {
+ case 512:
+ lp = ECE_RESOL_FB_LP_512;
+ break;
+ case 1024:
+ lp = ECE_RESOL_FB_LP_1024;
+ break;
+ case 2048:
+ lp = ECE_RESOL_FB_LP_2048;
+ break;
+ case 2560:
+ lp = ECE_RESOL_FB_LP_2560;
+ break;
+ case 4096:
+ lp = ECE_RESOL_FB_LP_4096;
+ break;
+ default:
+ return;
+ }
+
+ regmap_write(ece, ECE_RESOL, lp);
+}
+
+static void nuvoton_video_ece_set_fb_addr(struct nuvoton_video *video,
+ u32 buffer)
+{
+ struct regmap *ece = video->ece.regmap;
+
+ regmap_write(ece, ECE_FBR_BA, buffer);
+}
+
+static void nuvoton_video_ece_set_enc_dba(struct nuvoton_video *video, u32 addr)
+{
+ struct regmap *ece = video->ece.regmap;
+
+ regmap_write(ece, ECE_ED_BA, addr);
+}
+
+static void nuvoton_video_ece_clear_rect_offset(struct nuvoton_video *video)
+{
+ struct regmap *ece = video->ece.regmap;
+
+ regmap_write(ece, ECE_HEX_RECT_OFFSET, 0);
+}
+
+static void nuvoton_video_ece_ctrl_reset(struct nuvoton_video *video)
+{
+ struct regmap *ece = video->ece.regmap;
+
+ regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, 0);
+ regmap_update_bits(ece, ECE_HEX_CTRL, ECE_HEX_CTRL_ENCDIS,
+ ECE_HEX_CTRL_ENCDIS);
+ regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN,
+ ECE_DDA_CTRL_ECEEN);
+ regmap_update_bits(ece, ECE_HEX_CTRL, ECE_HEX_CTRL_ENCDIS, 0);
+
+ nuvoton_video_ece_clear_rect_offset(video);
+}
+
+static void nuvoton_video_ece_ip_reset(struct nuvoton_video *video)
+{
+ reset_control_assert(video->ece.reset);
+ msleep(100);
+ reset_control_deassert(video->ece.reset);
+ msleep(100);
100 ms is quite long. Please add a comment, where that is documented. Is
there a way to poll, if the device is done?
+}
+
+static int nuvoton_video_ece_init(struct nuvoton_video *video)
+{
+ nuvoton_video_ece_ip_reset(video);
+ nuvoton_video_ece_ctrl_reset(video);
+
+ return 0;
+}
+
+static int nuvoton_video_ece_stop(struct nuvoton_video *video)
+{
+ struct regmap *ece = video->ece.regmap;
+
+ regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_ECEEN, 0);
+ regmap_update_bits(ece, ECE_DDA_CTRL, ECE_DDA_CTRL_INTEN, 0);
+ regmap_update_bits(ece, ECE_HEX_CTRL, ECE_HEX_CTRL_ENCDIS,
+ ECE_HEX_CTRL_ENCDIS);
+ nuvoton_video_ece_clear_rect_offset(video);
+
+ return 0;
+}
+
+static bool nuvoton_video_alloc_buf(struct nuvoton_video *video,
+ struct nuvoton_video_addr *addr,
+ unsigned int size)
+{
+ if (size > VCD_MAX_SRC_BUFFER_SIZE)
+ size = VCD_MAX_SRC_BUFFER_SIZE;
+
+ addr->virt = dma_alloc_coherent(video->dev, size, &addr->dma,
+ GFP_KERNEL);
+
+ if (!addr->virt)
+ return false;
+
+ addr->size = size;
+ return true;
+}
+
+static void nuvoton_video_free_buf(struct nuvoton_video *video,
+ struct nuvoton_video_addr *addr)
+{
+ dma_free_coherent(video->dev, addr->size, addr->virt, addr->dma);
+ addr->size = 0;
+ addr->dma = 0ULL;
+ addr->virt = NULL;
+}
+
+static void nuvoton_video_free_diff_table(struct nuvoton_video *video)
+{
+ struct list_head *head, *pos, *nx;
+ struct rect_list *tmp;
+ int i;
unsigned?
+
+ for (i = 0; i < video->num_buffers; i++) {
+ head = &video->list[i];
+ list_for_each_safe(pos, nx, head) {
+ tmp = list_entry(pos, struct rect_list, list);
+ if (tmp) {
+ list_del(&tmp->list);
+ kfree(tmp);
+ }
+ }
+ }
+}
+
+static int nuvoton_video_add_rect(struct nuvoton_video *video, int index,
+ u32 x, u32 y, u32 w, u32 h)
+{
+ struct list_head *head = &video->list[index];
+ struct rect_list *list = NULL;
+ struct v4l2_rect *r;
+
+ list = kzalloc(sizeof(*list), GFP_KERNEL);
+ if (!list)
+ return 0;
+
+ r = &list->clip.c;
+ r->left = x;
+ r->top = y;
+ r->width = w;
+ r->height = h;
+
+ list_add_tail(&list->list, head);
+ return 1;
+}
+
+static void nuvoton_video_merge_rect(struct nuvoton_video *video,
+ struct rect_list_info *info)
+{
+ struct list_head *head = info->head;
+ struct rect_list *list = info->list;
+ struct rect_list *first = info->first;
+ struct v4l2_rect *r = &list->clip.c;
+ struct v4l2_rect *f = &first->clip.c;
+
+ if (!first) {
+ first = list;
+ info->first = first;
+ list_add_tail(&list->list, head);
+ video->rect_cnt++;
+ } else {
+ if ((r->left == (f->left + f->width)) && r->top == f->top) {
+ f->width += r->width;
+ kfree(list);
+ } else if ((r->top == (f->top + f->height)) &&
+ (r->left == f->left)) {
+ f->height += r->height;
+ kfree(list);
+ } else if (((r->top > f->top) &&
+ (r->top < (f->top + f->height))) &&
+ ((r->left > f->left) &&
+ (r->left < (f->left + f->width)))) {
+ kfree(list);
+ } else {
+ list_add_tail(&list->list, head);
+ video->rect_cnt++;
+ info->first = list;
+ }
+ }
+}
+
+static struct rect_list *nuvoton_video_new_rect(struct nuvoton_video *video,
+ int offset, int index)
+{
+ struct v4l2_bt_timings *act = &video->active_timings;
+ struct rect_list *list = NULL;
+ struct v4l2_rect *r;
+
+ list = kzalloc(sizeof(*list), GFP_KERNEL);
+ if (!list)
+ return NULL;
+
+ r = &list->clip.c;
+
+ r->left = (offset << 4);
+ r->top = (index >> 2);
+ r->width = RECT_W;
+ r->height = RECT_H;
+ if ((r->left + RECT_W) > act->width)
+ r->width = act->width - r->left;
+ if ((r->top + RECT_H) > act->height)
+ r->height = act->height - r->top;
+
+ return list;
+}
+
+static int nuvoton_video_find_rect(struct nuvoton_video *video,
+ struct rect_list_info *info, u32 offset)
+{
+ int i = info->index;
+
+ if (offset < info->tile_perline) {
+ info->list = nuvoton_video_new_rect(video, offset, i);
`i` is only used here, so use `info->index`?
+ if (!info->list)
+ return -ENOMEM;
+
+ nuvoton_video_merge_rect(video, info);
+ }
+ return 0;
+}
+
+static int nuvoton_video_build_table(struct nuvoton_video *video,
+ struct rect_list_info *info)
+{
+ int i = info->index;
+ int j, ret, bit;
Make `j` unsigned?
+ u32 value;
+ struct regmap *vcd = video->vcd_regmap;
+
+ for (j = 0; j < info->offset_perline; j += 4) {
+ regmap_read(vcd, VCD_DIFF_TBL + (j + i), &value);
`i` is only used here, so use `info->index`?
+
+ bitmap_from_arr32(bitmap, &value, BITMAP_SIZE);
+
+ for_each_set_bit(bit, bitmap, BITMAP_SIZE) {
+ ret = nuvoton_video_find_rect(video, info,
+ bit + (j << 3));
+ if (ret < 0)
+ return ret;
+ }
+ }
+ info->index += 64;
+ return info->tile_perline;
+}
+
+static int nuvoton_video_get_rect_list(struct nuvoton_video *video, int index)
+{
+ struct v4l2_bt_timings *act = &video->active_timings;
+ struct rect_list_info info;
+ int ret = 0;
+ u32 mod, tile_cnt = 0;
+
+ memset(&info, 0, sizeof(struct rect_list_info));
+ info.head = &video->list[index];
+
+ info.tile_perline = act->width >> 4;
+ mod = act->width % RECT_W;
+ if (mod != 0)
+ info.tile_perline += 1;
+
+ info.tile_perrow = act->height >> 4;
+ mod = act->height % RECT_H;
+ if (mod != 0)
+ info.tile_perrow += 1;
+
+ info.tile_size = info.tile_perrow * info.tile_perline;
+
+ info.offset_perline = info.tile_perline >> 5;
+ mod = info.tile_perline % 32;
+ if (mod != 0)
+ info.offset_perline += 1;
+
+ info.offset_perline *= 4;
+
+ do {
+ ret = nuvoton_video_build_table(video, &info);
+ if (ret < 0)
+ return ret;
+ tile_cnt += ret;
+ } while (tile_cnt < info.tile_size);
+
+ return ret;
+}
+
+static u8 nuvoton_video_is_mga(struct nuvoton_video *video)
+{
+ struct regmap *gfxi = video->gfx_regmap;
+ u32 dispst;
+
+ regmap_read(gfxi, DISPST, &dispst);
+ return ((dispst & DISPST_MGAMODE) == DISPST_MGAMODE);
+}
+
+static u32 nuvoton_video_hres(struct nuvoton_video *video)
+{
+ struct regmap *gfxi = video->gfx_regmap;
+ u32 hvcnth, hvcntl, apb_hor_res;
+
+ regmap_read(gfxi, HVCNTH, &hvcnth);
+ regmap_read(gfxi, HVCNTL, &hvcntl);
+ apb_hor_res = (((hvcnth & HVCNTH_MASK) << 8) +
+ (hvcntl & HVCNTL_MASK) + 1);
+
+ return apb_hor_res;
+}
+
+static u32 nuvoton_video_vres(struct nuvoton_video *video)
+{
+ struct regmap *gfxi = video->gfx_regmap;
+ u32 vvcnth, vvcntl, apb_ver_res;
+
+ regmap_read(gfxi, VVCNTH, &vvcnth);
+ regmap_read(gfxi, VVCNTL, &vvcntl);
+
+ apb_ver_res = (((vvcnth & VVCNTH_MASK) << 8) + (vvcntl & VVCNTL_MASK));
+
+ return apb_ver_res;
+}
+
+static int nuvoton_video_capres(struct nuvoton_video *video, u32 hor_res,
+ u32 vert_res)
+{
+ struct regmap *vcd = video->vcd_regmap;
+ u32 res, cap_res;
+
+ if (hor_res > MAX_WIDTH || vert_res > MAX_HEIGHT)
+ return -EINVAL;
+
+ res = FIELD_PREP(VCD_CAP_RES_VERT_RES, vert_res) |
+ FIELD_PREP(VCD_CAP_RES_HOR_RES, hor_res);
+
+ regmap_write(vcd, VCD_CAP_RES, res);
+ regmap_read(vcd, VCD_CAP_RES, &cap_res);
+
+ if (cap_res != res)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void nuvoton_video_vcd_ip_reset(struct nuvoton_video *video)
+{
+ reset_control_assert(video->reset);
+ msleep(100);
+ reset_control_deassert(video->reset);
+ msleep(100);
100 ms is quite long. Please add a comment, where that is documented. Is
there a way to poll, if the device is done?
+}
+
+static void nuvoton_video_vcd_state_machine_reset(struct nuvoton_video *video)
+{
+ struct regmap *vcd = video->vcd_regmap;
+ u32 stat;
+ int ret;
+
+ regmap_update_bits(vcd, VCD_MODE, VCD_MODE_VCDE, 0);
+
+ regmap_update_bits(vcd, VCD_MODE, VCD_MODE_IDBC, 0);
+
+ regmap_update_bits(vcd, VCD_CMD, VCD_CMD_RST, VCD_CMD_RST);
+
+ ret = regmap_read_poll_timeout(vcd, VCD_STAT, stat,
+ (stat & VCD_STAT_DONE), 0,
+ ECE_POLL_TIMEOUT_US);
+
+ if (ret) {
+ dev_warn(video->dev, "Wait for VCD_STAT_DONE timeout\n");
+ return;
+ }
+
+ regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
+
+ regmap_update_bits(vcd, VCD_MODE, VCD_MODE_VCDE, VCD_MODE_VCDE);
+
+ regmap_update_bits(vcd, VCD_MODE, VCD_MODE_IDBC, VCD_MODE_IDBC);
+}
+
+static int nuvoton_video_gfx_reset(struct nuvoton_video *video)
+{
+ struct regmap *gcr = video->gcr_regmap;
+
+ regmap_update_bits(gcr, INTCR2, INTCR2_GIRST2, INTCR2_GIRST2);
+
+ nuvoton_video_vcd_state_machine_reset(video);
+
+ regmap_update_bits(gcr, INTCR2, INTCR2_GIRST2, 0);
+
+ return 0;
+}
+
+static void nuvoton_video_kvm_bw(struct nuvoton_video *video, u8 bandwidth)
+{
+ struct regmap *vcd = video->vcd_regmap;
+
+ if (!nuvoton_video_is_mga(video))
+ bandwidth = 1;
+
+ if (bandwidth)
+ regmap_update_bits(vcd, VCD_MODE, VCD_MODE_KVM_BW_SET,
+ VCD_MODE_KVM_BW_SET);
+ else
+ regmap_update_bits(vcd, VCD_MODE, VCD_MODE_KVM_BW_SET, 0);
+}
+
+static u32 nuvoton_video_pclk(struct nuvoton_video *video)
+{
+ struct regmap *gfxi = video->gfx_regmap;
+ u32 tmp, pllfbdiv, pllinotdiv, gpllfbdiv;
+ u8 gpllfbdv109, gpllfbdv8, gpllindiv;
+ u8 gpllst_pllotdiv1, gpllst_pllotdiv2;
+
+ regmap_read(gfxi, GPLLST, &tmp);
+ gpllfbdv109 = FIELD_GET(GPLLST_GPLLFBDV109, tmp);
+ gpllst_pllotdiv1 = FIELD_GET(GPLLST_PLLOTDIV1, tmp);
+ gpllst_pllotdiv2 = FIELD_GET(GPLLST_PLLOTDIV2, tmp);
+
+ regmap_read(gfxi, GPLLINDIV, &tmp);
+ gpllfbdv8 = FIELD_GET(GPLLINDIV_GPLLFBDV8, tmp);
+ gpllindiv = FIELD_GET(GPLLINDIV_MASK, tmp);
+
+ regmap_read(gfxi, GPLLFBDIV, &tmp);
+ gpllfbdiv = FIELD_GET(GPLLFBDIV_MASK, tmp);
+
+ pllfbdiv = (512 * gpllfbdv109 + 256 * gpllfbdv8 + gpllfbdiv);
+ pllinotdiv = (gpllindiv * gpllst_pllotdiv1 * gpllst_pllotdiv2);
+ if (pllfbdiv == 0 || pllinotdiv == 0)
+ return 0;
+
+ return ((pllfbdiv * 25000) / pllinotdiv) * 1000;
+}
+
+static int nuvoton_video_get_bpp(struct nuvoton_video *video)
+{
+ struct regmap *vcd = video->vcd_regmap;
+ u32 mode, color_cnvr;
+
+ regmap_read(vcd, VCD_MODE, &mode);
+
+ color_cnvr = FIELD_GET(VCD_MODE_COLOR_CNVRT, mode);
+
+ switch (color_cnvr) {
+ case VCD_MODE_COLOR_CNVRT_NO_CNVRT:
+ return 2;
+ case VCD_MODE_COLOR_CNVRT_RGB_222:
+ case VCD_MODE_COLOR_CNVRT_666_MODE:
+ return 1;
+ case VCD_MODE_COLOR_CNVRT_RGB_888:
+ return 4;
+ }
+ return 0;
+}
+
+/*
+ * Pitch must be a power of 2, >= linebytes,
+ * at least 512, and no more than 4096.
+ */
+static void nuvoton_video_set_linepitch(struct nuvoton_video *video,
+ u32 linebytes)
+{
+ struct regmap *vcd = video->vcd_regmap;
+ u32 pitch = MIN_LP;
+
+ while ((pitch < linebytes) && (pitch < MAX_LP))
+ pitch *= 2;
+
+ regmap_write(vcd, VCD_FB_LP, FIELD_PREP(VCD_FBA_LP, pitch) |
+ FIELD_PREP(VCD_FBB_LP, pitch));
+}
+
+static u32 nuvoton_video_get_linepitch(struct nuvoton_video *video)
+{
+ struct regmap *vcd = video->vcd_regmap;
+ u32 linepitch;
+
+ regmap_read(vcd, VCD_FB_LP, &linepitch);
+
+ return FIELD_GET(VCD_FBA_LP, linepitch);
+}
+
+static int nuvoton_video_command(struct nuvoton_video *video, u32 value)
+{
+ struct regmap *vcd = video->vcd_regmap;
+ u32 cmd;
+
+ regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
+
+ regmap_read(vcd, VCD_CMD, &cmd);
+ cmd |= FIELD_PREP(VCD_CMD_OPERATION, value);
+
+ regmap_write(vcd, VCD_CMD, cmd);
+ regmap_update_bits(vcd, VCD_CMD, VCD_CMD_GO, VCD_CMD_GO);
+ video->op_cmd = value;
+
+ return 0;
+}
+
+static int nuvoton_video_init_reg(struct nuvoton_video *video)
+{
+ struct regmap *gcr = video->gcr_regmap;
+ struct regmap *vcd = video->vcd_regmap;
+
+ /* Selects Data Enable */
+ regmap_update_bits(gcr, INTCR, INTCR_DEHS, 0);
+
+ /* Enable display of KVM GFX and access to memory */
+ regmap_update_bits(gcr, INTCR, INTCR_GFXIFDIS, 0);
+
+ /* Active Vertical/Horizontal Counters Reset */
+ regmap_update_bits(gcr, INTCR2, INTCR2_GIHCRST | INTCR2_GIVCRST,
+ INTCR2_GIHCRST | INTCR2_GIVCRST);
+
+ /* Select KVM GFX input */
+ regmap_update_bits(gcr, MFSEL1, MFSEL1_DVH1SEL, 0);
+
+ /* Reset video modules */
+ nuvoton_video_vcd_ip_reset(video);
+ nuvoton_video_gfx_reset(video);
+
+ /* Set the FIFO thresholds */
+ regmap_write(vcd, VCD_FIFO, VCD_FIFO_TH);
+
+ /* Set video mode */
+ regmap_update_bits(vcd, VCD_MODE, 0xffffffff,
+ VCD_MODE_VCDE | VCD_MODE_CM565 |
+ VCD_MODE_IDBC | VCD_MODE_KVM_BW_SET);
+
+ regmap_write(vcd, VCD_RCHG, FIELD_PREP(VCD_RCHG_TIM_PRSCL, 0xf));
+
+ return 0;
+}
+
+static int nuvoton_video_start_frame(struct nuvoton_video *video)
+{
+ unsigned long flags;
+ struct nuvoton_video_buffer *buf;
+ struct regmap *vcd = video->vcd_regmap;
+ u32 val;
+ int ret;
+
+ dev_dbg(video->dev, "%s\n", __func__);
+
+ if (video->v4l2_input_status) {
+ dev_dbg(video->dev, "No video signal; skip capture frame\n");
+ return 0;
+ }
+
+ ret = regmap_read_poll_timeout(vcd, VCD_STAT, val,
+ !(val & VCD_STAT_BUSY), 1000,
+ VCD_BUSY_TIMEOUT_US);
+
+ if (ret) {
+ dev_err(video->dev, "Wait for VCD_STAT_BUSY timeout\n");
+ return -EBUSY;
+ }
+
+ spin_lock_irqsave(&video->lock, flags);
+ buf = list_first_entry_or_null(&video->buffers,
+ struct nuvoton_video_buffer, link);
+ if (!buf) {
+ spin_unlock_irqrestore(&video->lock, flags);
+ dev_dbg(video->dev, "No empty buffers; skip capture frame\n");
+ return 0;
+ }
+
+ set_bit(VIDEO_FRAME_INPRG, &video->flags);
+ spin_unlock_irqrestore(&video->lock, flags);
+
+ nuvoton_video_vcd_state_machine_reset(video);
+
+ regmap_update_bits(vcd, VCD_INTE, VCD_INTE_DONE_IE | VCD_INTE_IFOT_IE |
+ VCD_INTE_IFOR_IE, VCD_INTE_DONE_IE |
+ VCD_INTE_IFOT_IE | VCD_INTE_IFOR_IE);
+
+ nuvoton_video_command(video, video->ctrl_cmd);
+
+ return 0;
+}
+
+static void nuvoton_video_bufs_done(struct nuvoton_video *video,
+ enum vb2_buffer_state state)
+{
+ unsigned long flags;
+ struct nuvoton_video_buffer *buf;
+
+ spin_lock_irqsave(&video->lock, flags);
+ list_for_each_entry(buf, &video->buffers, link)
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ INIT_LIST_HEAD(&video->buffers);
+ spin_unlock_irqrestore(&video->lock, flags);
+}
+
+static void nuvoton_video_get_diff_rect(struct nuvoton_video *video, int index)
+{
+ u32 width = video->active_timings.width;
+ u32 height = video->active_timings.height;
+
+ if (video->op_cmd != VCD_CMD_OPERATION_CAPTURE) {
+ video->rect_cnt = 0;
+ nuvoton_video_get_rect_list(video, index);
+ video->rect[index] = video->rect_cnt;
+ } else {
+ video->rect[index] = nuvoton_video_add_rect(video, index, 0, 0,
+ width, height);
+ }
+}
+
+static irqreturn_t nuvoton_video_irq(int irq, void *arg)
+{
+ struct nuvoton_video *video = arg;
+ struct regmap *vcd = video->vcd_regmap;
+ struct nuvoton_video_buffer *buf;
+ struct rect_list *rect_list;
+ struct v4l2_rect *rect;
+ u32 status, ed_offset, ed_size, total_size;
+ void *addr;
+ dma_addr_t vb_dma_addr;
+ int index;
+
+ regmap_read(vcd, VCD_STAT, &status);
+ dev_dbg(video->dev, "VCD irq status 0x%x\n", status);
+
+ regmap_write(vcd, VCD_INTE, 0);
+ regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
+
+ if (test_bit(VIDEO_STOPPED, &video->flags) ||
+ !test_bit(VIDEO_STREAMING, &video->flags)) {
+ clear_bit(VIDEO_FRAME_INPRG, &video->flags);
+ return IRQ_NONE;
+ }
+
+ if (status & VCD_STAT_DONE) {
+ spin_lock(&video->lock);
+ buf = list_first_entry_or_null(&video->buffers,
+ struct nuvoton_video_buffer,
+ link);
+
+ if (!buf) {
+ spin_unlock(&video->lock);
+ clear_bit(VIDEO_FRAME_INPRG, &video->flags);
+ return IRQ_NONE;
+ }
+
+ addr = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
+ vb_dma_addr = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
+ index = buf->vb.vb2_buf.index;
+
+ nuvoton_video_ece_ctrl_reset(video);
+ nuvoton_video_ece_clear_rect_offset(video);
+
+ nuvoton_video_ece_set_fb_addr(video, video->src.dma);
+
+ /* Set base address of encoded data to video buffer */
+ nuvoton_video_ece_set_enc_dba(video, vb_dma_addr);
+
+ nuvoton_video_ece_set_lp(video, video->bytesperline);
+ nuvoton_video_get_diff_rect(video, index);
+
+ total_size = 0;
+
+ list_for_each_entry(rect_list, &video->list[index], list) {
+ rect = &rect_list->clip.c;
+ ed_offset = nuvoton_video_ece_read_rect_offset(video);
+
+ nuvoton_video_ece_enc_rect(video, rect->left,
+ rect->top, rect->width,
+ rect->height);
+ ed_size = nuvoton_video_ece_get_ed_size(video,
+ ed_offset,
+ addr);
+
+ nuvoton_video_ece_prepend_rect_header(addr + ed_offset,
+ rect->left,
+ rect->top,
+ rect->width,
+ rect->height);
+
+ total_size += ed_size;
+ }
+
+ vb2_set_plane_payload(&buf->vb.vb2_buf, 0, total_size);
+ buf->vb.vb2_buf.timestamp = ktime_get_ns();
+ buf->vb.sequence = video->sequence++;
+ buf->vb.field = V4L2_FIELD_NONE;
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+ list_del(&buf->link);
+
+ spin_unlock(&video->lock);
+
+ clear_bit(VIDEO_FRAME_INPRG, &video->flags);
+ }
+
+ if (status & VCD_STAT_IFOR || status & VCD_STAT_IFOT) {
+ dev_warn(video->dev, "VCD FIFO overrun or over thresholds\n");
+ nuvoton_video_vcd_ip_reset(video);
+ nuvoton_video_gfx_reset(video);
+ nuvoton_video_start_frame(video);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void nuvoton_video_clear_gmmap(struct nuvoton_video *video)
+{
+ struct regmap *gcr = video->gcr_regmap;
+ u32 intcr3, gmmap;
+ void __iomem *baseptr;
+
+ regmap_read(gcr, INTCR3, &intcr3);
+ gmmap = FIELD_GET(INTCR3_GMMAP, intcr3);
+
+ switch (gmmap) {
+ case INTCR3_GMMAP_128MB:
+ baseptr = ioremap(ADDR_GMMAP_128MB, GMMAP_LENGTH);
+ break;
+ case INTCR3_GMMAP_256MB:
+ baseptr = ioremap(ADDR_GMMAP_256MB, GMMAP_LENGTH);
+ break;
+ case INTCR3_GMMAP_512MB:
+ baseptr = ioremap(ADDR_GMMAP_512MB, GMMAP_LENGTH);
+ break;
+ case INTCR3_GMMAP_1GB:
+ baseptr = ioremap(ADDR_GMMAP_1GB, GMMAP_LENGTH);
+ break;
+ case INTCR3_GMMAP_2GB:
+ baseptr = ioremap(ADDR_GMMAP_2GB, GMMAP_LENGTH);
+ break;
+ }
+
+ memset(baseptr, 0, GMMAP_LENGTH);
+ iounmap(baseptr);
+}
+
+static void nuvoton_video_get_resolution(struct nuvoton_video *video)
+{
+ struct v4l2_bt_timings *act = &video->active_timings;
+ struct v4l2_bt_timings *det = &video->detected_timings;
+ struct regmap *gfxi;
+ u32 dispst;
+
+ video->v4l2_input_status = 0;
+
+ det->width = nuvoton_video_hres(video);
+ det->height = nuvoton_video_vres(video);
+
+ if (act->width != det->width || act->height != det->height) {
+ dev_dbg(video->dev, "Resolution changed\n");
+
+ nuvoton_video_bufs_done(video, VB2_BUF_STATE_ERROR);
+
+ if (nuvoton_video_hres(video) > 0 &&
+ nuvoton_video_vres(video) > 0) {
+ //struct regmap *gfxi = video->gfx_regmap;
+ gfxi = video->gfx_regmap;
+ //u32 dispst;
+
+ if (test_bit(VIDEO_STREAMING, &video->flags)) {
+ /*
+ * Wait for resolution is available,
+ * and it is also captured by host.
+ */
+ do {
+ mdelay(100);
+ regmap_read(gfxi, DISPST, &dispst);
+ } while (nuvoton_video_vres(video) < 100 ||
+ nuvoton_video_pclk(video) == 0 ||
+ (dispst & DISPST_HSCROFF));
+ }
+
+ det->width = nuvoton_video_hres(video);
+ det->height = nuvoton_video_vres(video);
+ det->pixelclock = nuvoton_video_pclk(video);
+ }
+ }
+
+ if (det->width == 0 || det->height == 0) {
+ det->width = MIN_WIDTH;
+ det->height = MIN_HEIGHT;
+ nuvoton_video_clear_gmmap(video);
+ video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
+ }
+
+ dev_dbg(video->dev, "Got resolution[%dx%d] -> [%dx%d], status %d\n",
+ act->width, act->height, det->width, det->height,
+ video->v4l2_input_status);
+}
+
+static void nuvoton_video_set_resolution(struct nuvoton_video *video)
+{
+ struct v4l2_bt_timings *act = &video->active_timings;
+ struct regmap *vcd = video->vcd_regmap;
+ u32 mode;
+
+ /* Set video frame physical address */
+ regmap_write(vcd, VCD_FBA_ADR, video->src.dma);
+ regmap_write(vcd, VCD_FBB_ADR, video->src.dma);
+
+ nuvoton_video_capres(video, act->width, act->height);
+
+ video->bytesperpixel = nuvoton_video_get_bpp(video);
+ nuvoton_video_set_linepitch(video, act->width * video->bytesperpixel);
+
+ video->bytesperline = nuvoton_video_get_linepitch(video);
+
+ nuvoton_video_kvm_bw(video, act->pixelclock > VCD_KVM_BW_PCLK);
+
+ nuvoton_video_gfx_reset(video);
+
+ regmap_read(vcd, VCD_MODE, &mode);
+
+ clear_bit(VIDEO_FRAME_INPRG, &video->flags);
+
+ dev_dbg(video->dev, "VCD mode = 0x%x, %s mode\n", mode,
+ nuvoton_video_is_mga(video) ? "Hi Res" : "VGA");
+
+ dev_dbg(video->dev,
+ "Digital mode: %d x %d x %d, pixelclock %lld, bytesperline %d\n",
+ act->width, act->height, video->bytesperpixel, act->pixelclock,
+ video->bytesperline);
+}
+
+static int nuvoton_video_start(struct nuvoton_video *video)
+{
+ int rc;
+
+ dev_dbg(video->dev, "%s\n", __func__);
+
+ rc = nuvoton_video_init_reg(video);
+ if (rc)
+ return rc;
+
+ nuvoton_video_get_resolution(video);
+
+ video->active_timings = video->detected_timings;
+
+ video->max_buffer_size = VCD_MAX_SRC_BUFFER_SIZE;
+ if (!nuvoton_video_alloc_buf(video, &video->src,
+ video->max_buffer_size))
+ return -ENOMEM;
+
+ nuvoton_video_set_resolution(video);
+
+ video->pix_fmt.width = video->active_timings.width;
+ video->pix_fmt.height = video->active_timings.height;
+ video->pix_fmt.sizeimage = video->max_buffer_size;
+ video->pix_fmt.bytesperline = video->bytesperline;
+
+ if (atomic_inc_return(&video->ece.clients) == 1) {
+ nuvoton_video_ece_init(video);
+ nuvoton_video_ece_set_fb_addr(video, video->src.dma);
+ nuvoton_video_ece_set_lp(video, video->bytesperline);
+
+ dev_dbg(video->dev, "ECE open: client %d\n",
+ atomic_read(&video->ece.clients));
+ }
+
+ return 0;
+}
+
+static void nuvoton_video_stop(struct nuvoton_video *video)
+{
+ unsigned long flags;
+ struct regmap *vcd = video->vcd_regmap;
+
+ dev_dbg(video->dev, "%s\n", __func__);
+
+ spin_lock_irqsave(&video->lock, flags);
+ set_bit(VIDEO_STOPPED, &video->flags);
+ spin_unlock_irqrestore(&video->lock, flags);
+
+ regmap_write(vcd, VCD_INTE, 0);
+ regmap_write(vcd, VCD_MODE, 0);
+ regmap_write(vcd, VCD_RCHG, 0);
+ regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
+
+ if (video->src.size)
+ nuvoton_video_free_buf(video, &video->src);
+
+ if (video->list)
+ nuvoton_video_free_diff_table(video);
+
+ kfree(video->list);
+ video->list = NULL;
+
+ kfree(video->rect);
+ video->rect = NULL;
+
+ video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
+ video->flags = 0;
+ video->ctrl_cmd = VCD_CMD_OPERATION_CAPTURE;
+
+ if (atomic_dec_return(&video->ece.clients) == 0) {
+ nuvoton_video_ece_stop(video);
+ dev_dbg(video->dev, "ECE close: client %d\n",
+ atomic_read(&video->ece.clients));
+ }
+}
+
+static int nuvoton_video_querycap(struct file *file, void *fh,
+ struct v4l2_capability *cap)
+{
+ strscpy(cap->driver, DEVICE_NAME, sizeof(cap->driver));
+ strscpy(cap->card, "Nuvoton Video Engine", sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ DEVICE_NAME);
+
+ return 0;
+}
+
+static int nuvoton_video_enum_format(struct file *file, void *fh,
+ struct v4l2_fmtdesc *f)
+{
+ if (f->index)
+ return -EINVAL;
+
+ f->pixelformat = V4L2_PIX_FMT_RGB565;
+
+ return 0;
+}
+
+static int nuvoton_video_get_format(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ f->fmt.pix = video->pix_fmt;
+
+ return 0;
+}
+
+static int nuvoton_video_enum_input(struct file *file, void *fh,
+ struct v4l2_input *inp)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ if (inp->index)
+ return -EINVAL;
+
+ strlcpy(inp->name, "Host VGA capture", sizeof(inp->name));
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+ inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
+ inp->status = video->v4l2_input_status;
+
+ return 0;
+}
+
+static int nuvoton_video_get_input(struct file *file, void *fh, unsigned int *i)
+{
+ *i = 0;
+
+ return 0;
+}
+
+static int nuvoton_video_set_input(struct file *file, void *fh, unsigned int i)
+{
+ if (i)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int nuvoton_video_get_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+ a->parm.capture.readbuffers = 3;
+ a->parm.capture.timeperframe.numerator = 1;
+ if (!video->frame_rate)
+ a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE;
+ else
+ a->parm.capture.timeperframe.denominator = video->frame_rate;
+
+ return 0;
+}
+
+static int nuvoton_video_set_parm(struct file *file, void *fh,
+ struct v4l2_streamparm *a)
+{
+ unsigned int frame_rate = 0;
+
+ a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+ a->parm.capture.readbuffers = 3;
+
+ if (a->parm.capture.timeperframe.numerator)
+ frame_rate = a->parm.capture.timeperframe.denominator /
+ a->parm.capture.timeperframe.numerator;
+
+ if (!frame_rate || frame_rate > MAX_FRAME_RATE) {
+ frame_rate = 0;
+ a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE;
+ a->parm.capture.timeperframe.numerator = 1;
+ }
+
+ return 0;
+}
+
+static int nuvoton_video_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ if (fsize->index)
+ return -EINVAL;
+
+ if (fsize->pixel_format != V4L2_PIX_FMT_RGB565)
+ return -EINVAL;
+
+ fsize->discrete.width = video->pix_fmt.width;
+ fsize->discrete.height = video->pix_fmt.height;
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+
+ return 0;
+}
+
+static int nuvoton_video_enum_frameintervals(struct file *file, void *fh,
+ struct v4l2_frmivalenum *fival)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ if (fival->index)
+ return -EINVAL;
+
+ if (fival->width != video->detected_timings.width ||
+ fival->height != video->detected_timings.height)
+ return -EINVAL;
+
+ if (fival->pixel_format != V4L2_PIX_FMT_RGB565)
+ return -EINVAL;
+
+ fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
+
+ fival->stepwise.min.denominator = MAX_FRAME_RATE;
+ fival->stepwise.min.numerator = 1;
+ fival->stepwise.max.denominator = 1;
+ fival->stepwise.max.numerator = 1;
+ fival->stepwise.step = fival->stepwise.max;
+
+ return 0;
+}
+
+static int nuvoton_video_get_vid_overlay(struct file *file, void *fh,
+ struct v4l2_format *fmt)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+ struct v4l2_window *win = &fmt->fmt.win;
+ struct list_head *head, *pos, *nx;
+ struct rect_list *entry, *tmp;
+ struct v4l2_rect *rect;
+
+ if (video->list && video->rect) {
+ win->clipcount = video->rect[video->vb_index];
+ head = &video->list[video->vb_index];
+
+ entry = list_first_entry_or_null(head, struct rect_list, list);
+ if (entry) {
+ //struct v4l2_rect *r = &entry->clip.c;
+ rect = &entry->clip.c;
+
+ win->w.top = rect->top;
+ win->w.left = rect->left;
+ win->w.width = rect->width;
+ win->w.height = rect->height;
+
+ list_del(&entry->list);
+ kfree(entry);
+ if (video->rect[video->vb_index])
+ video->rect[video->vb_index]--;
+ }
+
+ list_for_each_safe(pos, nx, head) {
+ tmp = list_entry(pos, struct rect_list, list);
+ if (tmp) {
+ list_del(&tmp->list);
+ kfree(tmp);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int nuvoton_video_set_dv_timings(struct file *file, void *fh,
+ struct v4l2_dv_timings *timings)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ if (timings->bt.width == video->active_timings.width &&
+ timings->bt.height == video->active_timings.height)
+ return 0;
+
+ if (vb2_is_busy(&video->queue)) {
+ dev_err(video->dev, "%s device busy\n", __func__);
+ return -EBUSY;
+ }
+
+ video->active_timings = timings->bt;
+
+ nuvoton_video_set_resolution(video);
+
+ video->pix_fmt.width = timings->bt.width;
+ video->pix_fmt.height = timings->bt.height;
+ video->pix_fmt.sizeimage = video->max_buffer_size;
+ video->pix_fmt.bytesperline = video->bytesperline;
+
+ timings->type = V4L2_DV_BT_656_1120;
+
+ return 0;
+}
+
+static int nuvoton_video_get_dv_timings(struct file *file, void *fh,
+ struct v4l2_dv_timings *timings)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ timings->type = V4L2_DV_BT_656_1120;
+ timings->bt = video->active_timings;
+
+ return 0;
+}
+
+static int nuvoton_video_query_dv_timings(struct file *file, void *fh,
+ struct v4l2_dv_timings *timings)
+{
+ struct nuvoton_video *video = video_drvdata(file);
+
+ nuvoton_video_get_resolution(video);
+
+ timings->type = V4L2_DV_BT_656_1120;
+ timings->bt = video->detected_timings;
+
+ return video->v4l2_input_status ? -ENOLINK : 0;
+}
+
+static int nuvoton_video_enum_dv_timings(struct file *file, void *fh,
+ struct v4l2_enum_dv_timings *timings)
+{
+ return v4l2_enum_dv_timings_cap(timings, &nuvoton_video_timings_cap,
+ NULL, NULL);
+}
+
+static int nuvoton_video_dv_timings_cap(struct file *file, void *fh,
+ struct v4l2_dv_timings_cap *cap)
+{
+ *cap = nuvoton_video_timings_cap;
+
+ return 0;
+}
+
+static int nuvoton_video_sub_event(struct v4l2_fh *fh,
+ const struct v4l2_event_subscription *sub)
+{
+ switch (sub->type) {
+ case V4L2_EVENT_SOURCE_CHANGE:
+ return v4l2_src_change_event_subscribe(fh, sub);
+ }
+
+ return v4l2_ctrl_subscribe_event(fh, sub);
+}
+
+static const struct v4l2_ioctl_ops nuvoton_video_ioctls = {
+ .vidioc_querycap = nuvoton_video_querycap,
+
+ .vidioc_enum_fmt_vid_cap = nuvoton_video_enum_format,
+ .vidioc_g_fmt_vid_cap = nuvoton_video_get_format,
+ .vidioc_s_fmt_vid_cap = nuvoton_video_get_format,
+ .vidioc_try_fmt_vid_cap = nuvoton_video_get_format,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+
+ .vidioc_enum_input = nuvoton_video_enum_input,
+ .vidioc_g_input = nuvoton_video_get_input,
+ .vidioc_s_input = nuvoton_video_set_input,
+
+ .vidioc_g_parm = nuvoton_video_get_parm,
+ .vidioc_s_parm = nuvoton_video_set_parm,
+ .vidioc_g_fmt_vid_overlay = nuvoton_video_get_vid_overlay,
+ .vidioc_enum_framesizes = nuvoton_video_enum_framesizes,
+ .vidioc_enum_frameintervals = nuvoton_video_enum_frameintervals,
+
+ .vidioc_s_dv_timings = nuvoton_video_set_dv_timings,
+ .vidioc_g_dv_timings = nuvoton_video_get_dv_timings,
+ .vidioc_query_dv_timings = nuvoton_video_query_dv_timings,
+ .vidioc_enum_dv_timings = nuvoton_video_enum_dv_timings,
+ .vidioc_dv_timings_cap = nuvoton_video_dv_timings_cap,
+
+ .vidioc_subscribe_event = nuvoton_video_sub_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static int nuvoton_video_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct nuvoton_video *video = container_of(ctrl->handler,
+ struct nuvoton_video,
+ ctrl_handler);
+
+ switch (ctrl->id) {
+ case V4L2_CID_DETECT_MD_MODE:
+ if (ctrl->val == V4L2_DETECT_MD_MODE_GLOBAL)
+ video->ctrl_cmd = VCD_CMD_OPERATION_CAPTURE;
+ else
+ video->ctrl_cmd = VCD_CMD_OPERATION_COMPARE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops nuvoton_video_ctrl_ops = {
+ .s_ctrl = nuvoton_video_set_ctrl,
+};
+
+static int nuvoton_video_open(struct file *file)
+{
+ int rc;
+ struct nuvoton_video *video = video_drvdata(file);
+
+ mutex_lock(&video->video_lock);
+
+ rc = v4l2_fh_open(file);
+ if (rc) {
+ mutex_unlock(&video->video_lock);
+ return rc;
+ }
+
+ if (v4l2_fh_is_singular_file(file))
+ nuvoton_video_start(video);
+
+ mutex_unlock(&video->video_lock);
+
+ return 0;
+}
+
+static int nuvoton_video_release(struct file *file)
+{
+ int rc;
+ struct nuvoton_video *video = video_drvdata(file);
+
+ mutex_lock(&video->video_lock);
+
+ if (v4l2_fh_is_singular_file(file))
+ nuvoton_video_stop(video);
+
+ rc = _vb2_fop_release(file, NULL);
+
+ mutex_unlock(&video->video_lock);
+
+ return rc;
+}
+
+static const struct v4l2_file_operations nuvoton_video_v4l2_fops = {
+ .owner = THIS_MODULE,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = vb2_fop_mmap,
+ .open = nuvoton_video_open,
+ .release = nuvoton_video_release,
+};
+
+static int nuvoton_video_queue_setup(struct vb2_queue *q,
+ unsigned int *num_buffers,
+ unsigned int *num_planes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct nuvoton_video *video = vb2_get_drv_priv(q);
+ int i;
unsigned?
+
+ dev_dbg(video->dev, "%s\n", __func__);
+
+ if (*num_planes) {
+ if (sizes[0] < video->max_buffer_size)
+ return -EINVAL;
+
+ return 0;
+ }
+
+ *num_planes = 1;
+ sizes[0] = video->max_buffer_size;
+
+ kfree(video->rect);
+ video->rect = NULL;
+
+ video->rect = kcalloc(*num_buffers, sizeof(*video->rect), GFP_KERNEL);
+
+ if (video->list) {
+ nuvoton_video_free_diff_table(video);
+ kfree(video->list);
+ video->list = NULL;
+ }
+
+ video->list = kzalloc(sizeof(*video->list) * *num_buffers, GFP_KERNEL);
+
+ for (i = 0; i < *num_buffers; i++)
+ INIT_LIST_HEAD(&video->list[i]);
+
+ video->num_buffers = *num_buffers;
+
+ return 0;
+}
+
+static int nuvoton_video_buf_prepare(struct vb2_buffer *vb)
+{
+ struct nuvoton_video *video = vb2_get_drv_priv(vb->vb2_queue);
+
+ if (vb2_plane_size(vb, 0) < video->max_buffer_size)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int nuvoton_video_start_streaming(struct vb2_queue *q,
+ unsigned int count)
+{
+ int rc;
+ struct nuvoton_video *video = vb2_get_drv_priv(q);
+
+ dev_dbg(video->dev, "%s\n", __func__);
+
+ video->sequence = 0;
+
+ rc = nuvoton_video_start_frame(video);
+ if (rc) {
+ nuvoton_video_bufs_done(video, VB2_BUF_STATE_QUEUED);
+ return rc;
+ }
+
+ set_bit(VIDEO_STREAMING, &video->flags);
+ return 0;
+}
+
+static void nuvoton_video_stop_streaming(struct vb2_queue *q)
+{
+ struct nuvoton_video *video = vb2_get_drv_priv(q);
+ struct regmap *vcd = video->vcd_regmap;
+
+ dev_dbg(video->dev, "%s\n", __func__);
+
+ clear_bit(VIDEO_STREAMING, &video->flags);
+
+ regmap_write(vcd, VCD_INTE, 0);
+ regmap_write(vcd, VCD_STAT, VCD_STAT_CLEAR);
+ nuvoton_video_gfx_reset(video);
+
+ nuvoton_video_bufs_done(video, VB2_BUF_STATE_ERROR);
+
+ video->ctrl_cmd = VCD_CMD_OPERATION_CAPTURE;
+}
+
+static void nuvoton_video_buf_queue(struct vb2_buffer *vb)
+{
+ int empty;
+ struct nuvoton_video *video = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct nuvoton_video_buffer *nvb = to_nuvoton_video_buffer(vbuf);
+ unsigned long flags;
+
+ dev_dbg(video->dev, "%s\n", __func__);
+
+ spin_lock_irqsave(&video->lock, flags);
+ empty = list_empty(&video->buffers);
Where is empty read later?
+ list_add_tail(&nvb->link, &video->buffers);
+ spin_unlock_irqrestore(&video->lock, flags);
+}
+
+static void nuvoton_video_buf_finish(struct vb2_buffer *vb)
+{
+ struct nuvoton_video *video = vb2_get_drv_priv(vb->vb2_queue);
+ struct regmap *vcd = video->vcd_regmap;
+ u32 val;
+ int ret;
+
+ dev_dbg(video->dev, "%s\n", __func__);
I think ftrace can be used to trace functions (though this is static).
+
+ ret = regmap_read_poll_timeout(vcd, VCD_STAT, val,
+ !(val & VCD_STAT_BUSY), 1000,
+ VCD_BUSY_TIMEOUT_US);
+
+ if (ret) {
+ dev_warn(video->dev, "Wait for VCD_STAT_BUSY timeout\n");
+ return;
+ }
+
+ /* Capture next frame when a video buffer is dequeued */
+ nuvoton_video_start_frame(video);
+
+ video->vb_index = vb->index;
+}
+
+static const struct vb2_ops nuvoton_video_vb2_ops = {
+ .queue_setup = nuvoton_video_queue_setup,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .buf_prepare = nuvoton_video_buf_prepare,
+ .buf_finish = nuvoton_video_buf_finish,
+ .start_streaming = nuvoton_video_start_streaming,
+ .stop_streaming = nuvoton_video_stop_streaming,
+ .buf_queue = nuvoton_video_buf_queue,
+};
+
+static int nuvoton_video_setup_video(struct nuvoton_video *video)
+{
+ struct v4l2_device *v4l2_dev = &video->v4l2_dev;
+ struct video_device *vdev = &video->vdev;
+ struct vb2_queue *vbq = &video->queue;
+ int rc;
+
+ video->pix_fmt.pixelformat = V4L2_PIX_FMT_RGB565;
+ video->pix_fmt.field = V4L2_FIELD_NONE;
+ video->pix_fmt.colorspace = V4L2_COLORSPACE_SRGB;
+ video->v4l2_input_status = V4L2_IN_ST_NO_SIGNAL;
+
+ rc = v4l2_device_register(video->dev, v4l2_dev);
+ if (rc) {
+ dev_err(video->dev, "Failed to register v4l2 device\n");
+ return rc;
+ }
+
+ v4l2_ctrl_handler_init(&video->ctrl_handler, 10);
+
+ v4l2_ctrl_new_std_menu(&video->ctrl_handler, &nuvoton_video_ctrl_ops,
+ V4L2_CID_DETECT_MD_MODE,
+ V4L2_DETECT_MD_MODE_REGION_GRID, 0,
+ V4L2_DETECT_MD_MODE_GLOBAL);
+
+ if (video->ctrl_handler.error) {
+ dev_err(video->dev, "Failed to init controls: %d\n",
+ video->ctrl_handler.error);
+
+ rc = video->ctrl_handler.error;
+
+ v4l2_ctrl_handler_free(&video->ctrl_handler);
+ v4l2_device_unregister(v4l2_dev);
+
+ return rc;
+ }
+
+ v4l2_dev->ctrl_handler = &video->ctrl_handler;
+
+ vbq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ vbq->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
+ vbq->dev = v4l2_dev->dev;
+ vbq->lock = &video->video_lock;
+ vbq->ops = &nuvoton_video_vb2_ops;
+ vbq->mem_ops = &vb2_dma_contig_memops;
+ vbq->drv_priv = video;
+ vbq->buf_struct_size = sizeof(struct nuvoton_video_buffer);
+ vbq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ vbq->min_buffers_needed = 3;
+
+ rc = vb2_queue_init(vbq);
+ if (rc) {
+ v4l2_ctrl_handler_free(&video->ctrl_handler);
+ v4l2_device_unregister(v4l2_dev);
+
+ dev_err(video->dev, "Failed to init vb2 queue\n");
+ return rc;
+ }
+
+ vdev->queue = vbq;
+ vdev->fops = &nuvoton_video_v4l2_fops;
+ vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
+ V4L2_CAP_STREAMING;
+ vdev->v4l2_dev = v4l2_dev;
+ strscpy(vdev->name, DEVICE_NAME, sizeof(vdev->name));
+ vdev->vfl_type = VFL_TYPE_VIDEO;
+ vdev->vfl_dir = VFL_DIR_RX;
+ vdev->release = video_device_release_empty;
+ vdev->ioctl_ops = &nuvoton_video_ioctls;
+ vdev->lock = &video->video_lock;
+
+ video_set_drvdata(vdev, video);
+ rc = video_register_device(vdev, VFL_TYPE_VIDEO, 0);
+ if (rc) {
+ vb2_queue_release(vbq);
+ v4l2_ctrl_handler_free(&video->ctrl_handler);
+ v4l2_device_unregister(v4l2_dev);
+
+ dev_err(video->dev, "Failed to register video device\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+static int nuvoton_video_init(struct nuvoton_video *video)
+{
+ int irq;
+ int rc;
+ struct device *dev = video->dev;
+
+ irq = irq_of_parse_and_map(dev->of_node, 0);
+ if (!irq) {
+ dev_err(dev, "Unable to find VCD IRQ\n");
+ return -ENODEV;
+ }
+
+ rc = devm_request_threaded_irq(dev, irq, NULL, nuvoton_video_irq,
+ IRQF_ONESHOT, DEVICE_NAME, video);
+ if (rc < 0) {
+ dev_err(dev, "Unable to request IRQ %d\n", irq);
+ return rc;
+ }
+
+ of_reserved_mem_device_init(dev);
+
+ rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+ if (rc) {
+ dev_err(dev, "Failed to set DMA mask\n");
+ of_reserved_mem_device_release(dev);
+ }
+
+ return rc;
+}
+
+static const struct regmap_config nuvoton_video_regmap_cfg = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = VCD_FIFO,
+};
+
+static const struct regmap_config nuvoton_video_ece_regmap_cfg = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = ECE_HEX_RECT_OFFSET,
+};
+
+static int nuvoton_video_probe(struct platform_device *pdev)
+{
+ int rc;
+ void __iomem *regs;
+ struct nuvoton_video *video = kzalloc(sizeof(*video), GFP_KERNEL);
+
+ if (!video)
+ return -ENOMEM;
+
+ video->frame_rate = MAX_FRAME_RATE;
+ video->dev = &pdev->dev;
+ spin_lock_init(&video->lock);
+ mutex_init(&video->video_lock);
+ INIT_LIST_HEAD(&video->buffers);
+
+ regs = devm_platform_ioremap_resource_byname(pdev, VCD_MODULE_NAME);
+ if (IS_ERR(regs)) {
+ dev_err(&pdev->dev, "Failed to get VCD regmap resource!\n");
Can you help the user more by saying what to fix like check devicetree
or so?
+ return PTR_ERR(regs);
+ }
+
+ video->vcd_regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+ &nuvoton_video_regmap_cfg);
+ if (IS_ERR(video->vcd_regmap)) {
+ dev_err(&pdev->dev, "Failed to init VCD regmap!\n");
+ return PTR_ERR(video->vcd_regmap);
+ }
+
+ regs = devm_platform_ioremap_resource_byname(pdev, ECE_MODULE_NAME);
+ if (IS_ERR(regs)) {
+ dev_err(&pdev->dev, "Failed to get ECE regmap resource!\n");
+ return PTR_ERR(regs);
+ }
+
+ video->ece.regmap = devm_regmap_init_mmio(&pdev->dev, regs,
+ &nuvoton_video_ece_regmap_cfg);
+ if (IS_ERR(video->ece.regmap)) {
+ dev_err(&pdev->dev, "Failed to init ECE regmap!\n");
+ return PTR_ERR(video->ece.regmap);
+ }
+
+ video->reset = devm_reset_control_get(&pdev->dev, VCD_MODULE_NAME);
+ if (IS_ERR(video->reset)) {
+ dev_err(&pdev->dev, "Failed to get VCD reset control!\n");
+ return PTR_ERR(video->reset);
+ }
+
+ video->ece.reset = devm_reset_control_get(&pdev->dev, ECE_MODULE_NAME);
+ if (IS_ERR(video->ece.reset)) {
+ dev_err(&pdev->dev, "Failed to get ECE reset control!\n");
+ return PTR_ERR(video->ece.reset);
+ }
+
+ video->gcr_regmap =
+ syscon_regmap_lookup_by_compatible("nuvoton,npcm750-gcr");
+ if (IS_ERR(video->gcr_regmap))
+ return PTR_ERR(video->gcr_regmap);
+
+ video->gfx_regmap =
+ syscon_regmap_lookup_by_compatible("nuvoton,npcm750-gfxi");
+ if (IS_ERR(video->gfx_regmap))
+ return PTR_ERR(video->gfx_regmap);
+
+ rc = nuvoton_video_init(video);
+ if (rc)
+ return rc;
+
+ rc = nuvoton_video_setup_video(video);
+ if (rc)
+ return rc;
+
+ dev_info(video->dev, "NPCM video driver probed\n");
+
+ return 0;
+}
+
+static int nuvoton_video_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
+ struct nuvoton_video *video = to_nuvoton_video(v4l2_dev);
+
+ video_unregister_device(&video->vdev);
+
+ vb2_queue_release(&video->queue);
+
+ v4l2_ctrl_handler_free(&video->ctrl_handler);
+
+ v4l2_device_unregister(v4l2_dev);
+
+ nuvoton_video_ece_stop(video);
+
+ of_reserved_mem_device_release(dev);
+
+ return 0;
+}
+
+static const struct of_device_id nuvoton_video_match[] = {
+ {
+ .compatible = "nuvoton,npcm750-video",
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, nuvoton_video_match)
+
+static struct platform_driver nuvoton_video_driver = {
+ .driver = {
+ .name = DEVICE_NAME,
+ .of_match_table = nuvoton_video_match,
+ },
+ .probe = nuvoton_video_probe,
+ .remove = nuvoton_video_remove,
+};
+
+module_platform_driver(nuvoton_video_driver);
+
+MODULE_AUTHOR("Joseph Liu<kwliu@xxxxxxxxxxx>");
+MODULE_AUTHOR("Marvin Lin<kflin@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Driver for Nuvoton NPCM Video Capture/Encode Engine");
+MODULE_LICENSE("GPL v2");
Kind regards,
Paul
[1]: https://notabs.org/coding/smallIntsBigPenalty.htm