[PATCH v2 1/2] staging: Introduce NVIDIA Tegra20 video decoder driver
From: Dmitry Osipenko
Date: Tue Oct 03 2017 - 17:54:04 EST
Video decoder, found on NVIDIA Tegra20 SoC, supports a standard set of
video formats like H.264 / MPEG-4 / WMV / VC1. Currently driver supports
decoding of CAVLC H.264 only.
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
.../bindings/arm/tegra/nvidia,tegra20-vde.txt | 43 +
drivers/staging/Kconfig | 2 +
drivers/staging/Makefile | 1 +
drivers/staging/tegra-vde/Kconfig | 6 +
drivers/staging/tegra-vde/Makefile | 1 +
drivers/staging/tegra-vde/TODO | 5 +
drivers/staging/tegra-vde/uapi.h | 101 ++
drivers/staging/tegra-vde/vde.c | 1105 ++++++++++++++++++++
8 files changed, 1264 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-vde.txt
create mode 100644 drivers/staging/tegra-vde/Kconfig
create mode 100644 drivers/staging/tegra-vde/Makefile
create mode 100644 drivers/staging/tegra-vde/TODO
create mode 100644 drivers/staging/tegra-vde/uapi.h
create mode 100644 drivers/staging/tegra-vde/vde.c
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-vde.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-vde.txt
new file mode 100644
index 000000000000..bf746777c58f
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-vde.txt
@@ -0,0 +1,43 @@
+NVIDIA Tegra Video Decoder Engine
+
+Required properties:
+- compatible : "nvidia,tegra20-vde"
+- reg : Must contain 2 register ranges: registers and IRAM region that
+ VDE uses for its internal needs and for passing some of decoding
+ parameters.
+- reg-names : Must include the following entries:
+ - regs
+ - iram
+- interrupts : Must contain an entry for each entry in interrupt-names.
+- interrupt-names : Must include the following entries:
+ - ucq-error
+ - sync-token
+ - bsev
+ - bsea
+ - sxe
+- clocks : Must contain an entry for each entry in clock-names.
+ See ../clocks/clock-bindings.txt for details.
+- clock-names : Must include the following entries:
+ - vde
+- resets : Must contain an entry for each entry in reset-names.
+ See ../reset/reset.txt for details.
+- reset-names : Must include the following entries:
+ - vde
+
+Example:
+ vde@6001a000 {
+ compatible = "nvidia,tegra20-vde";
+ reg = <0x6001a000 0x3D00 /* VDE registers */
+ 0x40000400 0x3FC00>; /* IRAM region */
+ reg-names = "regs", "iram";
+ interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>, /* UCQ error interrupt */
+ <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>, /* Sync token interrupt */
+ <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>, /* BSE-V interrupt */
+ <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>, /* BSE-A interrupt */
+ <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>; /* SXE interrupt */
+ interrupt-names = "ucq-error", "sync-token", "bsev", "bsea", "sxe";
+ clocks = <&tegra_car TEGRA20_CLK_VDE>;
+ clock-names = "vde";
+ resets = <&tegra_car 61>;
+ reset-names = "vde";
+ };
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 554683912cff..10c982811093 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -118,4 +118,6 @@ source "drivers/staging/vboxvideo/Kconfig"
source "drivers/staging/pi433/Kconfig"
+source "drivers/staging/tegra-vde/Kconfig"
+
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 8951c37d8d80..c5ef39767f22 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -49,3 +49,4 @@ obj-$(CONFIG_BCM2835_VCHIQ) += vc04_services/
obj-$(CONFIG_CRYPTO_DEV_CCREE) += ccree/
obj-$(CONFIG_DRM_VBOXVIDEO) += vboxvideo/
obj-$(CONFIG_PI433) += pi433/
+obj-$(CONFIG_TEGRA_VDE) += tegra-vde/
diff --git a/drivers/staging/tegra-vde/Kconfig b/drivers/staging/tegra-vde/Kconfig
new file mode 100644
index 000000000000..730ee006de66
--- /dev/null
+++ b/drivers/staging/tegra-vde/Kconfig
@@ -0,0 +1,6 @@
+config TEGRA_VDE
+ tristate "NVIDIA Tegra Video Decoder Engine driver"
+ depends on ARCH_TEGRA_2x_SOC || COMPILE_TEST
+ help
+ Say Y here to enable support for the NVIDIA Tegra video decoder
+ driver.
diff --git a/drivers/staging/tegra-vde/Makefile b/drivers/staging/tegra-vde/Makefile
new file mode 100644
index 000000000000..e7c0df1174bf
--- /dev/null
+++ b/drivers/staging/tegra-vde/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_TEGRA_VDE) += vde.o
diff --git a/drivers/staging/tegra-vde/TODO b/drivers/staging/tegra-vde/TODO
new file mode 100644
index 000000000000..e98bbc7b3c19
--- /dev/null
+++ b/drivers/staging/tegra-vde/TODO
@@ -0,0 +1,5 @@
+TODO:
+ - Figure out how generic V4L2 API could be utilized by this driver,
+ implement it.
+
+Contact: Dmitry Osipenko <digetx@xxxxxxxxx>
diff --git a/drivers/staging/tegra-vde/uapi.h b/drivers/staging/tegra-vde/uapi.h
new file mode 100644
index 000000000000..36d76278d27c
--- /dev/null
+++ b/drivers/staging/tegra-vde/uapi.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2016-2017 Dmitry Osipenko <digetx@xxxxxxxxx>
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _UAPI_TEGRA_VDE_H_
+#define _UAPI_TEGRA_VDE_H_
+
+#include <linux/types.h>
+#include <asm/ioctl.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#define FLAG_B_FRAME (1 << 0)
+#define FLAG_REFERENCE (1 << 1)
+
+struct tegra_vde_h264_frame {
+ __s32 y_fd;
+ __s32 cb_fd;
+ __s32 cr_fd;
+ __s32 aux_fd;
+ __u32 y_offset;
+ __u32 cb_offset;
+ __u32 cr_offset;
+ __u32 aux_offset;
+ __u32 frame_num;
+ __u32 flags;
+
+ __u32 reserved;
+} __attribute__((packed));
+
+struct tegra_vde_h264_decoder_ctx {
+ __s32 bitstream_data_fd;
+ __u32 bitstream_data_offset;
+
+ __u32 dpb_frames_ptr;
+ __u8 dpb_frames_nb;
+ __u8 dpb_ref_frames_with_earlier_poc_nb;
+
+ // SPS
+ __u8 baseline_profile;
+ __u8 level_idc;
+ __u8 log2_max_pic_order_cnt_lsb;
+ __u8 log2_max_frame_num;
+ __u8 pic_order_cnt_type;
+ __u8 direct_8x8_inference_flag;
+ __u8 pic_width_in_mbs;
+ __u8 pic_height_in_mbs;
+
+ // PPS
+ __u8 pic_init_qp;
+ __u8 deblocking_filter_control_present_flag;
+ __u8 constrained_intra_pred_flag;
+ __u8 chroma_qp_index_offset;
+ __u8 pic_order_present_flag;
+
+ // Slice header
+ __u8 num_ref_idx_l0_active_minus1;
+ __u8 num_ref_idx_l1_active_minus1;
+
+ __u32 reserved;
+} __attribute__((packed));
+
+#define VDE_IOCTL_BASE ('v' + 0x20)
+
+#define VDE_IO(nr) _IO(VDE_IOCTL_BASE, nr)
+#define VDE_IOR(nr, type) _IOR(VDE_IOCTL_BASE, nr, type)
+#define VDE_IOW(nr, type) _IOW(VDE_IOCTL_BASE, nr, type)
+#define VDE_IOWR(nr, type) _IOWR(VDE_IOCTL_BASE, nr, type)
+
+#define TEGRA_VDE_DECODE_H264 0x00
+
+#define TEGRA_VDE_IOCTL_DECODE_H264 \
+ VDE_IOW(TEGRA_VDE_DECODE_H264, struct tegra_vde_h264_decoder_ctx)
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif // _UAPI_TEGRA_VDE_H_
diff --git a/drivers/staging/tegra-vde/vde.c b/drivers/staging/tegra-vde/vde.c
new file mode 100644
index 000000000000..75575e89b2db
--- /dev/null
+++ b/drivers/staging/tegra-vde/vde.c
@@ -0,0 +1,1105 @@
+/*
+ * NVIDIA Tegra20 Video decoder driver
+ *
+ * Copyright (C) 2016-2017 Dmitry Osipenko <digetx@xxxxxxxxx>
+ *
+ * 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/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include <soc/tegra/pmc.h>
+
+#include "uapi.h"
+
+#define SXE(offt) (0x0000 + (offt)) /* Syntax Engine */
+#define BSEV(offt) (0x1000 + (offt)) /* Video Bitstream Engine */
+#define MBE(offt) (0x2000 + (offt)) /* Macroblock Engine */
+#define PPE(offt) (0x2200 + (offt)) /* Post-processing Engine */
+#define MCE(offt) (0x2400 + (offt)) /* Motion Compensation Eng. */
+#define TFE(offt) (0x2600 + (offt)) /* Transform Engine */
+#define VDMA(offt) (0x2A00 + (offt)) /* Video DMA */
+#define FRAMEID(offt) (0x3800 + (offt))
+
+#define ICMDQUE_WR 0x00
+#define CMDQUE_CONTROL 0x08
+#define INTR_STATUS 0x18
+#define BSE_INT_ENB 0x40
+#define BSE_CONFIG 0x44
+
+#define BSE_ICMDQUE_EMPTY BIT(3)
+#define BSE_DMA_BUSY BIT(23)
+
+#define TEGRA_VDE_TIMEOUT msecs_to_jiffies(1000)
+
+#define VDE_WR(__data, __addr) \
+do { \
+ pr_debug("%s: %d: 0x%08X => " #__addr ")\n", \
+ __func__, __LINE__, (__data)); \
+ writel_relaxed(__data, __addr); \
+} while (0)
+
+struct video_frame {
+ struct dma_buf_attachment *y_dmabuf_attachment;
+ struct dma_buf_attachment *cb_dmabuf_attachment;
+ struct dma_buf_attachment *cr_dmabuf_attachment;
+ struct dma_buf_attachment *aux_dmabuf_attachment;
+ struct sg_table *y_sgt;
+ struct sg_table *cb_sgt;
+ struct sg_table *cr_sgt;
+ struct sg_table *aux_sgt;
+ dma_addr_t y_paddr;
+ dma_addr_t cb_paddr;
+ dma_addr_t cr_paddr;
+ dma_addr_t aux_paddr;
+ u32 frame_num;
+ u32 flags;
+};
+
+struct tegra_vde {
+ phys_addr_t iram_lists_paddr;
+ void __iomem *regs;
+ void __iomem *iram;
+ struct mutex lock;
+ struct miscdevice miscdev;
+ struct reset_control *rst;
+ struct completion decode_completion;
+ struct clk *clk;
+};
+
+static void tegra_vde_set_bits(void __iomem *regs, u32 mask, u32 offset)
+{
+ u32 value = readl_relaxed(regs + offset);
+
+ VDE_WR(value | mask, regs + offset);
+}
+
+static int tegra_vde_wait_mbe(void __iomem *regs)
+{
+ u32 tmp;
+
+ return readl_relaxed_poll_timeout(regs + MBE(0x8C), tmp,
+ (tmp >= 0x10), 1, 100);
+}
+
+static int tegra_vde_setup_mbe_frame_idx(void __iomem *regs,
+ unsigned int refs_nb,
+ bool setup_refs)
+{
+ u32 frame_idx_enb_mask = 0;
+ u32 value;
+ unsigned int frame_idx;
+ unsigned int idx;
+ int err;
+
+ VDE_WR(0xD0000000 | (0 << 23), regs + MBE(0x80));
+ VDE_WR(0xD0200000 | (0 << 23), regs + MBE(0x80));
+
+ err = tegra_vde_wait_mbe(regs);
+ if (err)
+ return err;
+
+ if (!setup_refs)
+ return 0;
+
+ for (idx = 0, frame_idx = 1; idx < refs_nb; idx++, frame_idx++) {
+ VDE_WR(0xD0000000 | (frame_idx << 23), regs + MBE(0x80));
+ VDE_WR(0xD0200000 | (frame_idx << 23), regs + MBE(0x80));
+
+ frame_idx_enb_mask |= frame_idx << (6 * (idx % 4));
+
+ if (idx % 4 == 3 || idx == refs_nb - 1) {
+ value = 0xC0000000;
+ value |= (idx >> 2) << 24;
+ value |= frame_idx_enb_mask;
+
+ VDE_WR(value, regs + MBE(0x80));
+
+ err = tegra_vde_wait_mbe(regs);
+ if (err)
+ return err;
+
+ frame_idx_enb_mask = 0;
+ }
+ }
+
+ return 0;
+}
+
+static void tegra_vde_mbe_set_0xa_reg(void __iomem *regs, int reg, u32 val)
+{
+ VDE_WR(0xA0000000 | (reg << 24) | (val & 0xFFFF), regs + MBE(0x80));
+ VDE_WR(0xA0000000 | ((reg + 1) << 24) | (val >> 16), regs + MBE(0x80));
+}
+
+static int tegra_vde_wait_bsev(struct tegra_vde *vde, bool wait_dma)
+{
+ struct device *dev = vde->miscdev.parent;
+ u32 value;
+ int err;
+
+ err = readl_relaxed_poll_timeout(vde->regs + BSEV(INTR_STATUS), value,
+ !(value & BIT(2)), 1, 100);
+ if (err) {
+ dev_err(dev, "BSEV unknown bit timeout\n");
+ return err;
+ }
+
+ err = readl_relaxed_poll_timeout(vde->regs + BSEV(INTR_STATUS), value,
+ (value & BSE_ICMDQUE_EMPTY), 1, 100);
+ if (err) {
+ dev_err(dev, "BSEV ICMDQUE flush timeout\n");
+ return err;
+ }
+
+ if (!wait_dma)
+ return 0;
+
+ err = readl_relaxed_poll_timeout(vde->regs + BSEV(INTR_STATUS), value,
+ !(value & BSE_DMA_BUSY), 1, 100);
+ if (err) {
+ dev_err(dev, "BSEV DMA timeout\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static int tegra_vde_push_to_bsev_icmdqueue(struct tegra_vde *vde,
+ u32 value, bool wait_dma)
+{
+ VDE_WR(value, vde->regs + BSEV(ICMDQUE_WR));
+
+ return tegra_vde_wait_bsev(vde, wait_dma);
+}
+
+static void tegra_vde_setup_frameid(void __iomem *regs,
+ struct video_frame *frame,
+ unsigned int frameid,
+ u32 mbs_width, u32 mbs_height)
+{
+ u32 y_paddr = frame ? frame->y_paddr : 0xFCDEAD00;
+ u32 cb_paddr = frame ? frame->cb_paddr : 0xFCDEAD00;
+ u32 cr_paddr = frame ? frame->cr_paddr : 0xFCDEAD00;
+ u32 value1 = frame ? ((mbs_width << 16) | mbs_height) : 0;
+ u32 value2 = frame ? ((((mbs_width + 1) >> 1) << 6) | 1) : 0;
+
+ VDE_WR( y_paddr >> 8, regs + FRAMEID(0x000 + frameid * 4));
+ VDE_WR(cb_paddr >> 8, regs + FRAMEID(0x100 + frameid * 4));
+ VDE_WR(cr_paddr >> 8, regs + FRAMEID(0x180 + frameid * 4));
+ VDE_WR(value1, regs + FRAMEID(0x080 + frameid * 4));
+ VDE_WR(value2, regs + FRAMEID(0x280 + frameid * 4));
+}
+
+static void tegra_setup_frameidx(void __iomem *regs,
+ struct video_frame *frames,
+ unsigned int frames_nb,
+ u32 mbs_width, u32 mbs_height)
+{
+ unsigned int idx;
+
+ for (idx = 0; idx < frames_nb; idx++)
+ tegra_vde_setup_frameid(regs, &frames[idx], idx,
+ mbs_width, mbs_height);
+ for (; idx < 17; idx++)
+ tegra_vde_setup_frameid(regs, NULL, idx, 0, 0);
+}
+
+static void tegra_vde_setup_iram_entry(void __iomem *iram_tables,
+ unsigned int table,
+ unsigned int row,
+ u32 value1, u32 value2)
+{
+ VDE_WR(value1, iram_tables + 0x80 * table + row * 8);
+ VDE_WR(value2, iram_tables + 0x80 * table + row * 8 + 4);
+}
+
+static void tegra_vde_setup_iram_tables(void __iomem *iram_tables,
+ struct video_frame *dpb_frames,
+ unsigned int ref_frames_nb,
+ unsigned int with_earlier_poc_nb)
+{
+ struct video_frame *frame;
+ u32 value, aux_paddr;
+ int with_later_poc_nb;
+ unsigned int i, k;
+
+ pr_debug("DPB: Frame 0: frame_num = %d\n", dpb_frames[0].frame_num);
+
+ pr_debug("REF L0:\n");
+
+ for (i = 0; i < 16; i++) {
+ if (i < ref_frames_nb) {
+ frame = &dpb_frames[i + 1];
+
+ aux_paddr = frame->aux_paddr;
+
+ value = (i + 1) << 26;
+ value |= !(frame->flags & FLAG_B_FRAME) << 25;
+ value |= 1 << 24;
+ value |= frame->frame_num;
+
+ pr_debug("\tFrame %d: frame_num = %d B_frame = %d\n",
+ i + 1, frame->frame_num,
+ (frame->flags & FLAG_B_FRAME));
+ } else {
+ aux_paddr = 0xFADEAD00;
+ value = 0;
+ }
+
+ tegra_vde_setup_iram_entry(iram_tables, 0, i, value, aux_paddr);
+ tegra_vde_setup_iram_entry(iram_tables, 1, i, value, aux_paddr);
+ tegra_vde_setup_iram_entry(iram_tables, 2, i, value, aux_paddr);
+ tegra_vde_setup_iram_entry(iram_tables, 3, i, value, aux_paddr);
+ }
+
+ if (!(dpb_frames[0].flags & FLAG_B_FRAME))
+ return;
+
+ if (with_earlier_poc_nb >= ref_frames_nb)
+ return;
+
+ with_later_poc_nb = ref_frames_nb - with_earlier_poc_nb;
+
+ pr_debug("REF L1: with_later_poc_nb %d with_earlier_poc_nb %d\n",
+ with_later_poc_nb, with_earlier_poc_nb);
+
+ for (i = 0, k = with_earlier_poc_nb; i < with_later_poc_nb; i++, k++) {
+ frame = &dpb_frames[k + 1];
+
+ aux_paddr = frame->aux_paddr;
+
+ value = (k + 1) << 26;
+ value |= !(frame->flags & FLAG_B_FRAME) << 25;
+ value |= 1 << 24;
+ value |= frame->frame_num;
+
+ pr_debug("\tFrame %d: frame_num = %d\n",
+ k + 1, frame->frame_num);
+
+ tegra_vde_setup_iram_entry(iram_tables, 2, i, value, aux_paddr);
+ }
+
+ for (k = 0; i < ref_frames_nb; i++, k++) {
+ frame = &dpb_frames[k + 1];
+
+ aux_paddr = frame->aux_paddr;
+
+ value = (k + 1) << 26;
+ value |= !(frame->flags & FLAG_B_FRAME) << 25;
+ value |= 1 << 24;
+ value |= frame->frame_num;
+
+ pr_debug("\tFrame %d: frame_num = %d\n",
+ k + 1, frame->frame_num);
+
+ tegra_vde_setup_iram_entry(iram_tables, 2, i, value, aux_paddr);
+ }
+}
+
+static int tegra_vde_setup_hw_context(struct tegra_vde *vde,
+ struct tegra_vde_h264_decoder_ctx *ctx,
+ struct video_frame *dpb_frames,
+ phys_addr_t bitstream_data_paddr,
+ size_t bitstream_data_size,
+ unsigned int macroblocks_nb)
+{
+ struct device *dev = vde->miscdev.parent;
+ u32 value;
+ int err;
+
+ tegra_vde_set_bits(vde->regs, 0xA, SXE(0xF0));
+ tegra_vde_set_bits(vde->regs, 0xB, BSEV(CMDQUE_CONTROL));
+ tegra_vde_set_bits(vde->regs, 0x8002, MBE(0x50));
+ tegra_vde_set_bits(vde->regs, 0xA, MBE(0xA0));
+ tegra_vde_set_bits(vde->regs, 0xA, PPE(0x14));
+ tegra_vde_set_bits(vde->regs, 0xA, PPE(0x28));
+ tegra_vde_set_bits(vde->regs, 0xA00, MCE(0x08));
+ tegra_vde_set_bits(vde->regs, 0xA, TFE(0x00));
+ tegra_vde_set_bits(vde->regs, 0x5, VDMA(0x04));
+
+ VDE_WR(0x00000000, vde->regs + VDMA(0x1C));
+ VDE_WR(0x00000000, vde->regs + VDMA(0x00));
+ VDE_WR(0x00000007, vde->regs + VDMA(0x04));
+ VDE_WR(0x00000007, vde->regs + FRAMEID(0x200));
+ VDE_WR(0x00000005, vde->regs + TFE(0x04));
+ VDE_WR(0x00000000, vde->regs + MBE(0x84));
+ VDE_WR(0x00000010, vde->regs + SXE(0x08));
+ VDE_WR(0x00000150, vde->regs + SXE(0x54));
+ VDE_WR(0x0000054C, vde->regs + SXE(0x58));
+ VDE_WR(0x00000E34, vde->regs + SXE(0x5C));
+ VDE_WR(0x063C063C, vde->regs + MCE(0x10));
+ VDE_WR(0x0003FC00, vde->regs + BSEV(INTR_STATUS));
+ VDE_WR(0x0000150D, vde->regs + BSEV(BSE_CONFIG));
+ VDE_WR(0x00000100, vde->regs + BSEV(BSE_INT_ENB));
+ VDE_WR(0x00000000, vde->regs + BSEV(0x98));
+ VDE_WR(0x00000060, vde->regs + BSEV(0x9C));
+
+ memset_io(vde->iram + 512, 0, macroblocks_nb / 2);
+
+ tegra_setup_frameidx(vde->regs, dpb_frames, ctx->dpb_frames_nb,
+ ctx->pic_width_in_mbs, ctx->pic_height_in_mbs);
+
+ tegra_vde_setup_iram_tables(vde->iram, dpb_frames,
+ ctx->dpb_frames_nb - 1,
+ ctx->dpb_ref_frames_with_earlier_poc_nb);
+
+ VDE_WR(0x00000000, vde->regs + BSEV(0x8C));
+ VDE_WR(bitstream_data_paddr + bitstream_data_size,
+ vde->regs + BSEV(0x54));
+
+ value = ctx->pic_width_in_mbs << 11 | ctx->pic_height_in_mbs << 3;
+
+ VDE_WR(value, vde->regs + BSEV(0x88));
+
+ err = tegra_vde_wait_bsev(vde, false);
+ if (err)
+ return err;
+
+ err = tegra_vde_push_to_bsev_icmdqueue(vde, 0x800003FC, false);
+ if (err)
+ return err;
+
+ value = 0x01500000;
+ value |= ((vde->iram_lists_paddr + 512) >> 2) & 0xFFFF;
+
+ err = tegra_vde_push_to_bsev_icmdqueue(vde, value, true);
+ if (err)
+ return err;
+
+ err = tegra_vde_push_to_bsev_icmdqueue(vde, 0x840F054C, false);
+ if (err)
+ return err;
+
+ err = tegra_vde_push_to_bsev_icmdqueue(vde, 0x80000080, false);
+ if (err)
+ return err;
+
+ value = 0x0E340000 | ((vde->iram_lists_paddr >> 2) & 0xFFFF);
+
+ err = tegra_vde_push_to_bsev_icmdqueue(vde, value, true);
+ if (err)
+ return err;
+
+ value = 0x00800005;
+ value |= ctx->pic_width_in_mbs << 11;
+ value |= ctx->pic_height_in_mbs << 3;
+
+ VDE_WR(value, vde->regs + SXE(0x10));
+
+ value = !ctx->baseline_profile << 17;
+ value |= ctx->level_idc << 13;
+ value |= ctx->log2_max_pic_order_cnt_lsb << 7;
+ value |= ctx->pic_order_cnt_type << 5;
+ value |= ctx->log2_max_frame_num;
+
+ VDE_WR(value, vde->regs + SXE(0x40));
+
+ value = ctx->pic_init_qp << 25;
+ value |= !!(ctx->deblocking_filter_control_present_flag) << 2;
+ value |= !!ctx->pic_order_present_flag;
+
+ VDE_WR(value, vde->regs + SXE(0x44));
+
+ value = ctx->chroma_qp_index_offset;
+ value |= ctx->num_ref_idx_l0_active_minus1 << 5;
+ value |= ctx->num_ref_idx_l1_active_minus1 << 10;
+ value |= !!ctx->constrained_intra_pred_flag << 15;
+
+ VDE_WR(value, vde->regs + SXE(0x48));
+
+ value = 0x0C000000;
+ value |= !!(dpb_frames[0].flags & FLAG_B_FRAME) << 24;
+
+ VDE_WR(value, vde->regs + SXE(0x4C));
+
+ value = 0x03800000;
+ value |= min_t(size_t, bitstream_data_size, SZ_1M);
+
+ VDE_WR(value, vde->regs + SXE(0x68));
+
+ VDE_WR(bitstream_data_paddr, vde->regs + SXE(0x6C));
+
+ value = (1 << 28) | 5;
+ value |= ctx->pic_width_in_mbs << 11;
+ value |= ctx->pic_height_in_mbs << 3;
+
+ VDE_WR(value, vde->regs + MBE(0x80));
+
+ value = 0x26800000;
+ value |= ctx->level_idc << 4;
+ value |= !ctx->baseline_profile << 1;
+ value |= !!ctx->direct_8x8_inference_flag;
+
+ VDE_WR(value, vde->regs + MBE(0x80));
+
+ VDE_WR(0xF4000001, vde->regs + MBE(0x80));
+ VDE_WR(0x20000000, vde->regs + MBE(0x80));
+ VDE_WR(0xF4000101, vde->regs + MBE(0x80));
+
+ value = 0x20000000;
+ value |= ctx->chroma_qp_index_offset << 8;
+
+ VDE_WR(value, vde->regs + MBE(0x80));
+
+ err = tegra_vde_setup_mbe_frame_idx(vde->regs,
+ ctx->dpb_frames_nb - 1,
+ ctx->pic_order_cnt_type == 0);
+ if (err) {
+ dev_err(dev, "MBE frames setup failed\n");
+ return err;
+ }
+
+ tegra_vde_mbe_set_0xa_reg(vde->regs, 0, 0x000009FC);
+ tegra_vde_mbe_set_0xa_reg(vde->regs, 2, 0xF1DEAD00);
+ tegra_vde_mbe_set_0xa_reg(vde->regs, 4, 0xF2DEAD00);
+ tegra_vde_mbe_set_0xa_reg(vde->regs, 6, 0xF3DEAD00);
+ tegra_vde_mbe_set_0xa_reg(vde->regs, 8, dpb_frames[0].aux_paddr);
+
+ value = 0xFC000000;
+ value |= !!(dpb_frames[0].flags & FLAG_B_FRAME) << 2;
+
+ if (!ctx->baseline_profile)
+ value |= !!(dpb_frames[0].flags & FLAG_REFERENCE) << 1;
+
+ VDE_WR(value, vde->regs + MBE(0x80));
+
+ err = tegra_vde_wait_mbe(vde->regs);
+ if (err) {
+ dev_err(dev, "MBE programming failed\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static void tegra_vde_decode_frame(struct tegra_vde *vde, int macroblocks_nb)
+{
+ reinit_completion(&vde->decode_completion);
+
+ VDE_WR(0x00000001, vde->regs + BSEV(0x8C));
+ VDE_WR(0x20000000 | (macroblocks_nb - 1), vde->regs + SXE(0x00));
+}
+
+static void tegra_vde_detach_and_put_dmabuf(struct dma_buf_attachment *a,
+ struct sg_table *sgt,
+ enum dma_data_direction dma_dir)
+{
+ struct dma_buf *dmabuf = a->dmabuf;
+
+ dma_buf_unmap_attachment(a, sgt, dma_dir);
+ dma_buf_detach(dmabuf, a);
+ dma_buf_put(dmabuf);
+}
+
+static int tegra_vde_attach_dmabuf(struct device *dev,
+ int fd,
+ unsigned long offset,
+ unsigned int min_size,
+ struct dma_buf_attachment **a,
+ phys_addr_t *paddr,
+ struct sg_table **s,
+ size_t *size,
+ enum dma_data_direction dma_dir)
+{
+ struct dma_buf_attachment *attachment;
+ struct dma_buf *dmabuf;
+ struct sg_table *sgt;
+ int err;
+
+ dmabuf = dma_buf_get(fd);
+ if (IS_ERR(dmabuf)) {
+ dev_err(dev, "Invalid dmabuf FD\n");
+ return PTR_ERR(dmabuf);
+ }
+
+ if ((u64)offset + min_size > dmabuf->size) {
+ dev_err(dev, "Too small dmabuf size %d @0x%lX, "
+ "should be at least %d\n",
+ dmabuf->size, offset, min_size);
+ return -EINVAL;
+ }
+
+ attachment = dma_buf_attach(dmabuf, dev);
+ if (IS_ERR(attachment)) {
+ dev_err(dev, "Failed to attach dmabuf\n");
+ err = PTR_ERR(attachment);
+ goto err_put;
+ }
+
+ sgt = dma_buf_map_attachment(attachment, dma_dir);
+ if (IS_ERR(sgt)) {
+ dev_err(dev, "Failed to get dmabufs sg_table\n");
+ err = PTR_ERR(sgt);
+ goto err_detach;
+ }
+
+ if (sgt->nents != 1) {
+ dev_err(dev, "Sparse DMA region is unsupported\n");
+ err = -EINVAL;
+ goto err_unmap;
+ }
+
+ *paddr = sg_dma_address(sgt->sgl) + offset;
+ *a = attachment;
+ *s = sgt;
+
+ if (size)
+ *size = dmabuf->size - offset;
+
+ return 0;
+
+err_unmap:
+ dma_buf_unmap_attachment(attachment, sgt, dma_dir);
+err_detach:
+ dma_buf_detach(dmabuf, attachment);
+err_put:
+ dma_buf_put(dmabuf);
+
+ return err;
+}
+
+static int tegra_vde_attach_dmabufs_to_frame(struct device *dev,
+ struct video_frame *frame,
+ struct tegra_vde_h264_frame *source,
+ enum dma_data_direction dma_dir,
+ bool baseline_profile,
+ size_t csize)
+{
+ int err;
+
+ err = tegra_vde_attach_dmabuf(dev, source->y_fd,
+ source->y_offset, csize * 4,
+ &frame->y_dmabuf_attachment,
+ &frame->y_paddr,
+ &frame->y_sgt,
+ NULL, dma_dir);
+ if (err)
+ return err;
+
+ err = tegra_vde_attach_dmabuf(dev, source->cb_fd,
+ source->cb_offset, csize,
+ &frame->cb_dmabuf_attachment,
+ &frame->cb_paddr,
+ &frame->cb_sgt,
+ NULL, dma_dir);
+ if (err)
+ goto err_release_y;
+
+ err = tegra_vde_attach_dmabuf(dev, source->cr_fd,
+ source->cr_offset, csize,
+ &frame->cr_dmabuf_attachment,
+ &frame->cr_paddr,
+ &frame->cr_sgt,
+ NULL, dma_dir);
+ if (err)
+ goto err_release_cb;
+
+ if (baseline_profile)
+ frame->aux_paddr = 0xF4DEAD00;
+ else {
+ err = tegra_vde_attach_dmabuf(dev, source->aux_fd,
+ source->aux_offset, csize,
+ &frame->aux_dmabuf_attachment,
+ &frame->aux_paddr,
+ &frame->aux_sgt,
+ NULL, dma_dir);
+ if (err)
+ goto err_release_cr;
+ }
+
+ return 0;
+
+err_release_cr:
+ tegra_vde_detach_and_put_dmabuf(frame->cr_dmabuf_attachment,
+ frame->cr_sgt, dma_dir);
+err_release_cb:
+ tegra_vde_detach_and_put_dmabuf(frame->cb_dmabuf_attachment,
+ frame->cb_sgt, dma_dir);
+err_release_y:
+ tegra_vde_detach_and_put_dmabuf(frame->y_dmabuf_attachment,
+ frame->y_sgt, dma_dir);
+
+ return err;
+}
+
+static void tegra_vde_deattach_frames_dmabufs(struct video_frame *frame,
+ enum dma_data_direction dma_dir,
+ bool baseline_profile)
+{
+ if (!baseline_profile)
+ tegra_vde_detach_and_put_dmabuf(frame->aux_dmabuf_attachment,
+ frame->aux_sgt, dma_dir);
+
+ tegra_vde_detach_and_put_dmabuf(frame->cr_dmabuf_attachment,
+ frame->cr_sgt, dma_dir);
+
+ tegra_vde_detach_and_put_dmabuf(frame->cb_dmabuf_attachment,
+ frame->cb_sgt, dma_dir);
+
+ tegra_vde_detach_and_put_dmabuf(frame->y_dmabuf_attachment,
+ frame->y_sgt, dma_dir);
+}
+
+static int tegra_vde_copy_and_validate_frame(struct device *dev,
+ struct tegra_vde_h264_frame *frame,
+ unsigned long vaddr)
+{
+ if (copy_from_user(frame, (void __user *)vaddr, sizeof(*frame)))
+ return -EFAULT;
+
+ if (frame->frame_num > 0x7FFFFF) {
+ dev_err(dev, "Bad frame_num %u\n", frame->frame_num);
+ return -EINVAL;
+ }
+
+ if (frame->y_offset & 0xFF) {
+ dev_err(dev, "Bad y_offset 0x%X\n", frame->y_offset);
+ return -EINVAL;
+ }
+
+ if (frame->cb_offset & 0xFF) {
+ dev_err(dev, "Bad cb_offset 0x%X\n", frame->cb_offset);
+ return -EINVAL;
+ }
+
+ if (frame->cr_offset & 0xFF) {
+ dev_err(dev, "Bad cr_offset 0x%X\n", frame->cr_offset);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int tegra_vde_validate_h264_ctx(struct device *dev,
+ struct tegra_vde_h264_decoder_ctx *ctx)
+{
+ if (ctx->dpb_frames_nb == 0 || ctx->dpb_frames_nb > 17) {
+ dev_err(dev, "Bad DPB size %u\n", ctx->dpb_frames_nb);
+ return -EINVAL;
+ }
+
+ if (ctx->level_idc > 15) {
+ dev_err(dev, "Bad level value %u\n", ctx->level_idc);
+ return -EINVAL;
+ }
+
+ if (ctx->pic_init_qp > 52) {
+ dev_err(dev, "Bad pic_init_qp value %u\n", ctx->pic_init_qp);
+ return -EINVAL;
+ }
+
+ if (ctx->log2_max_pic_order_cnt_lsb > 16) {
+ dev_err(dev, "Bad log2_max_pic_order_cnt_lsb value %u\n",
+ ctx->log2_max_pic_order_cnt_lsb);
+ return -EINVAL;
+ }
+
+ if (ctx->log2_max_frame_num > 16) {
+ dev_err(dev, "Bad log2_max_frame_num value %u\n",
+ ctx->log2_max_frame_num);
+ return -EINVAL;
+ }
+
+ if (ctx->chroma_qp_index_offset > 31) {
+ dev_err(dev, "Bad chroma_qp_index_offset value %u\n",
+ ctx->chroma_qp_index_offset);
+ return -EINVAL;
+ }
+
+ if (ctx->pic_order_cnt_type > 2) {
+ dev_err(dev, "Bad pic_order_cnt_type value %u\n",
+ ctx->pic_order_cnt_type);
+ return -EINVAL;
+ }
+
+ if (ctx->num_ref_idx_l0_active_minus1 > 15) {
+ dev_err(dev, "Bad num_ref_idx_l0_active_minus1 value %u\n",
+ ctx->num_ref_idx_l0_active_minus1);
+ return -EINVAL;
+ }
+
+ if (ctx->num_ref_idx_l1_active_minus1 > 15) {
+ dev_err(dev, "Bad num_ref_idx_l1_active_minus1 value %u\n",
+ ctx->num_ref_idx_l1_active_minus1);
+ return -EINVAL;
+ }
+
+ if (!ctx->pic_width_in_mbs || ctx->pic_width_in_mbs > 127) {
+ dev_err(dev, "Bad pic_width_in_mbs value %u\n",
+ ctx->pic_width_in_mbs);
+ return -EINVAL;
+ }
+
+ if (!ctx->pic_height_in_mbs || ctx->pic_height_in_mbs > 127) {
+ dev_err(dev, "Bad pic_height_in_mbs value %u\n",
+ ctx->pic_height_in_mbs);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int tegra_vde_ioctl_decode_h264(struct tegra_vde *vde,
+ unsigned long vaddr)
+{
+ struct device *dev = vde->miscdev.parent;
+ struct tegra_vde_h264_decoder_ctx ctx;
+ struct tegra_vde_h264_frame frame;
+ struct video_frame *dpb_frames;
+ struct dma_buf_attachment *bitstream_data_dmabuf_attachment;
+ struct sg_table *bitstream_sgt;
+ enum dma_data_direction dma_dir;
+ phys_addr_t bitstream_data_paddr;
+ phys_addr_t bsev_paddr;
+ size_t bitstream_data_size;
+ unsigned int macroblocks_nb;
+ unsigned int i;
+ bool timeout;
+ int ret;
+
+ if (copy_from_user(&ctx, (void __user *)vaddr, sizeof(ctx)))
+ return -EFAULT;
+
+ ret = tegra_vde_validate_h264_ctx(dev, &ctx);
+ if (ret)
+ return -EINVAL;
+
+ ret = tegra_vde_attach_dmabuf(dev, ctx.bitstream_data_fd,
+ ctx.bitstream_data_offset, 0,
+ &bitstream_data_dmabuf_attachment,
+ &bitstream_data_paddr,
+ &bitstream_sgt,
+ &bitstream_data_size,
+ DMA_TO_DEVICE);
+ if (ret)
+ return ret;
+
+ dpb_frames = kcalloc(ctx.dpb_frames_nb, sizeof(*dpb_frames),
+ GFP_KERNEL);
+ if (!dpb_frames) {
+ ret = -ENOMEM;
+ goto err_release_bitstream_dmabuf;
+ }
+
+ macroblocks_nb = ctx.pic_width_in_mbs * ctx.pic_height_in_mbs;
+ vaddr = ctx.dpb_frames_ptr;
+
+ for (i = 0; i < ctx.dpb_frames_nb; i++) {
+ ret = tegra_vde_copy_and_validate_frame(dev, &frame, vaddr);
+ if (ret)
+ goto err_release_dpb_frames;
+
+ dpb_frames[i].flags = frame.flags;
+ dpb_frames[i].frame_num = frame.frame_num;
+
+ dma_dir = (i == 0) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+ ret = tegra_vde_attach_dmabufs_to_frame(dev, &dpb_frames[i],
+ &frame, dma_dir,
+ ctx.baseline_profile,
+ macroblocks_nb * 64);
+ if (ret)
+ goto err_release_dpb_frames;
+
+ vaddr += sizeof(frame);
+ }
+
+ ret = mutex_lock_interruptible(&vde->lock);
+ if (ret)
+ goto err_release_dpb_frames;
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ goto err_unlock;
+
+ /*
+ * We rely on the VDE registers reset value, otherwise VDE
+ * causes bus lockup.
+ */
+ ret = reset_control_reset(vde->rst);
+ if (ret) {
+ dev_err(dev, "Failed to reset HW: %d\n", ret);
+ goto err_put_runtime_pm;
+ }
+
+ ret = tegra_vde_setup_hw_context(vde, &ctx, dpb_frames,
+ bitstream_data_paddr,
+ bitstream_data_size,
+ macroblocks_nb);
+ if (ret)
+ goto err_put_runtime_pm;
+
+ tegra_vde_decode_frame(vde, macroblocks_nb);
+
+ timeout = !wait_for_completion_killable_timeout(&vde->decode_completion,
+ TEGRA_VDE_TIMEOUT);
+ if (timeout) {
+ bsev_paddr = readl_relaxed(vde->regs + BSEV(0x10));
+ macroblocks_nb = readl_relaxed(vde->regs + SXE(0xC8)) & 0x1FFF;
+
+ dev_err(dev, "Decoding failed, "
+ "read 0x%X bytes : %u macroblocks parsed\n",
+ bsev_paddr ? bsev_paddr - bitstream_data_paddr : 0,
+ macroblocks_nb);
+
+ ret = -EIO;
+ }
+
+err_put_runtime_pm:
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+err_unlock:
+ mutex_unlock(&vde->lock);
+
+err_release_dpb_frames:
+ while (i--) {
+ dma_dir = (i == 0) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+ tegra_vde_deattach_frames_dmabufs(&dpb_frames[i], dma_dir,
+ ctx.baseline_profile);
+ }
+
+ kfree(dpb_frames);
+
+err_release_bitstream_dmabuf:
+ tegra_vde_detach_and_put_dmabuf(bitstream_data_dmabuf_attachment,
+ bitstream_sgt, DMA_TO_DEVICE);
+
+ return ret;
+}
+
+static long tegra_vde_unlocked_ioctl(struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct miscdevice *miscdev = filp->private_data;
+ struct tegra_vde *vde = container_of(miscdev, struct tegra_vde,
+ miscdev);
+
+ switch (cmd) {
+ case TEGRA_VDE_IOCTL_DECODE_H264:
+ return tegra_vde_ioctl_decode_h264(vde, arg);
+ }
+
+ dev_err(miscdev->parent, "Invalid IOCTL command %u\n", cmd);
+
+ return -ENOTTY;
+}
+
+static const struct file_operations tegra_vde_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = tegra_vde_unlocked_ioctl,
+};
+
+static irqreturn_t tegra_vde_isr(int irq, void *data)
+{
+ struct tegra_vde *vde = data;
+
+ tegra_vde_set_bits(vde->regs, 0, FRAMEID(0x208));
+ complete(&vde->decode_completion);
+
+ return IRQ_HANDLED;
+}
+
+static int tegra_vde_runtime_suspend(struct device *dev)
+{
+ struct tegra_vde *vde = dev_get_drvdata(dev);
+ int err;
+
+ err = tegra_powergate_power_off(TEGRA_POWERGATE_VDEC);
+ if (err) {
+ dev_err(dev, "Failed to power down HW: %d\n", err);
+ return err;
+ }
+
+ clk_disable_unprepare(vde->clk);
+
+ return 0;
+}
+
+static int tegra_vde_runtime_resume(struct device *dev)
+{
+ struct tegra_vde *vde = dev_get_drvdata(dev);
+ int err;
+
+ err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_VDEC,
+ vde->clk, vde->rst);
+ if (err) {
+ dev_err(dev, "Failed to power up HW : %d\n", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int tegra_vde_probe(struct platform_device *pdev)
+{
+ struct resource *res_regs, *res_iram;
+ struct device *dev = &pdev->dev;
+ struct tegra_vde *vde;
+ int irq;
+ int err;
+
+ vde = devm_kzalloc(&pdev->dev, sizeof(*vde), GFP_KERNEL);
+ if (!vde)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, vde);
+
+ res_regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
+ if (!res_regs)
+ return -ENODEV;
+
+ res_iram = platform_get_resource_byname(pdev, IORESOURCE_MEM, "iram");
+ if (!res_iram)
+ return -ENODEV;
+
+ irq = platform_get_irq_byname(pdev, "sync-token");
+ if (irq < 0)
+ return irq;
+
+ vde->regs = devm_ioremap_resource(dev, res_regs);
+ if (IS_ERR(vde->regs))
+ return PTR_ERR(vde->regs);
+
+ vde->iram = devm_ioremap_resource(dev, res_iram);
+ if (IS_ERR(vde->iram))
+ return PTR_ERR(vde->iram);
+
+ vde->clk = devm_clk_get(dev, "vde");
+ if (IS_ERR(vde->clk)) {
+ dev_err(dev, "Could not get VDE clk\n");
+ return PTR_ERR(vde->clk);
+ }
+
+ vde->rst = devm_reset_control_get(dev, "vde");
+ if (IS_ERR(vde->rst)) {
+ dev_err(dev, "Could not get VDE reset\n");
+ return PTR_ERR(vde->rst);
+ }
+
+ err = devm_request_irq(dev, irq, tegra_vde_isr, 0,
+ dev_name(dev), vde);
+ if (err)
+ return err;
+
+ mutex_init(&vde->lock);
+ init_completion(&vde->decode_completion);
+
+ vde->iram_lists_paddr = res_iram->start;
+ vde->miscdev.minor = MISC_DYNAMIC_MINOR;
+ vde->miscdev.name = "tegra_vde";
+ vde->miscdev.fops = &tegra_vde_fops;
+ vde->miscdev.parent = dev;
+
+ err = misc_register(&vde->miscdev);
+ if (err) {
+ dev_err(dev, "Failed to register misc device: %d\n", err);
+ return err;
+ }
+
+ pm_runtime_enable(dev);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_set_autosuspend_delay(dev, 300);
+
+ if (!pm_runtime_enabled(dev)) {
+ err = tegra_vde_runtime_resume(dev);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int tegra_vde_remove(struct platform_device *pdev)
+{
+ struct tegra_vde *vde = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+ int err;
+
+ if (!pm_runtime_enabled(dev)) {
+ err = tegra_vde_runtime_suspend(dev);
+ if (err)
+ return err;
+ }
+
+ pm_runtime_dont_use_autosuspend(dev);
+ pm_runtime_disable(dev);
+ misc_deregister(&vde->miscdev);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra_vde_pm_suspend(struct device *dev)
+{
+ struct tegra_vde *vde = dev_get_drvdata(dev);
+ int err;
+
+ mutex_lock(&vde->lock);
+
+ err = pm_runtime_force_suspend(dev);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int tegra_vde_pm_resume(struct device *dev)
+{
+ struct tegra_vde *vde = dev_get_drvdata(dev);
+ int err;
+
+ err = pm_runtime_force_resume(dev);
+ if (err < 0)
+ return err;
+
+ mutex_unlock(&vde->lock);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops tegra_vde_pm_ops = {
+ SET_RUNTIME_PM_OPS(tegra_vde_runtime_suspend,
+ tegra_vde_runtime_resume,
+ NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(tegra_vde_pm_suspend,
+ tegra_vde_pm_resume)
+};
+
+static const struct of_device_id tegra_vde_of_match[] = {
+ { .compatible = "nvidia,tegra20-vde", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tegra_vde_of_match);
+
+static struct platform_driver tegra_vde_driver = {
+ .probe = tegra_vde_probe,
+ .remove = tegra_vde_remove,
+ .driver = {
+ .name = "tegra-vde",
+ .of_match_table = tegra_vde_of_match,
+ .pm = &tegra_vde_pm_ops,
+ },
+};
+module_platform_driver(tegra_vde_driver);
+
+MODULE_DESCRIPTION("NVIDIA Tegra20 Video Decoder driver");
+MODULE_AUTHOR("Dmitry Osipenko");
+MODULE_LICENSE("GPL");
--
2.14.1