From patchwork Thu Oct 19 21:34:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 828357 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="hedoZT8t"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3yJ2P70HRNz9t5x for ; Fri, 20 Oct 2017 08:38:51 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753213AbdJSViS (ORCPT ); Thu, 19 Oct 2017 17:38:18 -0400 Received: from mail-wr0-f195.google.com ([209.85.128.195]:53105 "EHLO mail-wr0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751411AbdJSVhh (ORCPT ); Thu, 19 Oct 2017 17:37:37 -0400 Received: by mail-wr0-f195.google.com with SMTP id k62so9662141wrc.9; Thu, 19 Oct 2017 14:37:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=HiQ+0voxJiRMNNNZlOL9pdO/PZqgGSAg4788KhH8Xn0=; b=hedoZT8tdMPFeX2Riy+8e597cHTKU7fhACdsF7l5gjGL08E++aimtaEBYsViGWm0P6 DuhuAA36md0eE1kUwokLegSXMQhVgoSec0r2fatjanBGeQCsdrHgOSByHHM+agfCnF07 pSJoepOiLdd7ugUZUEMQEx9OkfWTdNQE/Py0GXmkO/5UufnjXqs8+olOXwMvLuWfnDRO OqAdzbEF6hHYe46fNDXPMrH9ajAVolnooSZAca9lVrh6wKvyVQhvAF0gSOJfHKL8m9L9 7HjrcUU57++95xdTIrEqeDRNcUHEPyf9s627knd8vEjeO+yPMu6pr8aBiMjP57tjdFkA Ou9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=HiQ+0voxJiRMNNNZlOL9pdO/PZqgGSAg4788KhH8Xn0=; b=iJGLKCJm4Rz5rHJO6r/WPpYUgZ5qjLhW0wpaGMQVDeBBHJx6oFSRraZBEMWPQJRggQ nElazHd3B6ZR/WM/IT1jb3o/+9zxrUHj7SPKSrwBHnjB7D1k/HCWhnGa90WonZq6jbor M3KU0z0UhWMsbu2/DHeIXB5k3GMAThocNcKESkJfe/fEGLWTxfrtZdwyUolce7AzCtCB Ul3pX7MLEf59gZ07OzEOeDirCFqziUJGCYmbggm3FcxpSfKMJsqHNclZ520/VTQ43FYs stETvnCBd2AoYchbpEhCIWWQB6PbMOas4y9p1JMbF+H/9q0BhTG+GKJFaUKUQRH9fKAy 8EwA== X-Gm-Message-State: AMCzsaXPneJqO4cV+PgZoQeWaIwqqH7QVNoZMMOw5hRGC+NOdmc+1aRb O0TuaCWSM7y7lwfVB41tPmY= X-Google-Smtp-Source: ABhQp+TswLrY7y5LZ621M04caoobNuMWrpkD5JLu5zZW5vvZSSUf1tEYFlQALzecc2i1OnsRPP1kLQ== X-Received: by 10.223.199.137 with SMTP id l9mr2841707wrg.113.1508449055215; Thu, 19 Oct 2017 14:37:35 -0700 (PDT) Received: from localhost.localdomain (ppp109-252-91-27.pppoe.spdop.ru. [109.252.91.27]) by smtp.gmail.com with ESMTPSA id q74sm7349086wrb.51.2017.10.19.14.37.33 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 19 Oct 2017 14:37:34 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Greg Kroah-Hartman , Rob Herring , Mauro Carvalho Chehab , Stephen Warren , Vladimir Zapolskiy Cc: Dan Carpenter , linux-media@vger.kernel.org, linux-tegra@vger.kernel.org, devel@driverdev.osuosl.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 3/5] staging: Introduce NVIDIA Tegra video decoder driver Date: Fri, 20 Oct 2017 00:34:23 +0300 Message-Id: <1a3798f337c0097e67d70226ae3ba665fd9156c2.1508448293.git.digetx@gmail.com> X-Mailer: git-send-email 2.14.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org NVIDIA Tegra20/30/114/124/132 SoC's have video decoder engine that supports standard set of video formats like H.264 / MPEG-4 / WMV / VC1. Currently implemented decoding of CAVLC H.264 on Tegra20 only. Signed-off-by: Dmitry Osipenko --- drivers/staging/Kconfig | 2 + drivers/staging/Makefile | 1 + drivers/staging/tegra-vde/Kconfig | 7 + 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 | 1209 ++++++++++++++++++++++++++++++++++++ 7 files changed, 1326 insertions(+) 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/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-$(CONFIG_TEGRA_VDE) += tegra-vde/ diff --git a/drivers/staging/tegra-vde/Kconfig b/drivers/staging/tegra-vde/Kconfig new file mode 100644 index 000000000000..ec3ddddebdaa --- /dev/null +++ b/drivers/staging/tegra-vde/Kconfig @@ -0,0 +1,7 @@ +config TEGRA_VDE + tristate "NVIDIA Tegra Video Decoder Engine driver" + depends on ARCH_TEGRA || COMPILE_TEST + select SRAM + help + Say Y here to enable support for the NVIDIA Tegra video decoder + driver. diff --git a/drivers/staging/tegra-vde/Makefile b/drivers/staging/tegra-vde/Makefile new file mode 100644 index 000000000000..e7c0df1174bf --- /dev/null +++ b/drivers/staging/tegra-vde/Makefile @@ -0,0 +1 @@ +obj-$(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 diff --git a/drivers/staging/tegra-vde/uapi.h b/drivers/staging/tegra-vde/uapi.h new file mode 100644 index 000000000000..8502032b5ee2 --- /dev/null +++ b/drivers/staging/tegra-vde/uapi.h @@ -0,0 +1,101 @@ +/* + * Copyright (C) 2016-2017 Dmitry Osipenko + * 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 +#include + +#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; + + __u64 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..9dbe1d08757e --- /dev/null +++ b/drivers/staging/tegra-vde/vde.c @@ -0,0 +1,1209 @@ +/* + * NVIDIA Tegra20 Video decoder driver + * + * Copyright (C) 2016-2017 Dmitry Osipenko + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "uapi.h" + +#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 VDE_WR(__data, __addr) \ +do { \ + dev_dbg(vde->miscdev.parent, \ + "%s: %d: 0x%08X => " #__addr ")\n", \ + __func__, __LINE__, (u32)(__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_addr; + dma_addr_t cb_addr; + dma_addr_t cr_addr; + dma_addr_t aux_addr; + u32 frame_num; + u32 flags; +}; + +struct tegra_vde { + void __iomem *sxe; + void __iomem *bsev; + void __iomem *mbe; + void __iomem *ppe; + void __iomem *mce; + void __iomem *tfe; + void __iomem *ppb; + void __iomem *vdma; + void __iomem *frameid; + struct mutex lock; + struct miscdevice miscdev; + struct reset_control *rst; + struct gen_pool *iram_pool; + struct completion decode_completion; + struct clk *clk; + dma_addr_t iram_lists_addr; + u32 *iram; +}; + +static void tegra_vde_set_bits(struct tegra_vde *vde, + u32 mask, void __iomem *regs) +{ + u32 value = readl_relaxed(regs); + + VDE_WR(value | mask, regs); +} + +static int tegra_vde_wait_mbe(struct tegra_vde *vde) +{ + u32 tmp; + + return readl_relaxed_poll_timeout(vde->mbe + 0x8C, tmp, + (tmp >= 0x10), 1, 100); +} + +static int tegra_vde_setup_mbe_frame_idx(struct tegra_vde *vde, + 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), vde->mbe + 0x80); + VDE_WR(0xD0200000 | (0 << 23), vde->mbe + 0x80); + + err = tegra_vde_wait_mbe(vde); + 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), vde->mbe + 0x80); + VDE_WR(0xD0200000 | (frame_idx << 23), vde->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, vde->mbe + 0x80); + + err = tegra_vde_wait_mbe(vde); + if (err) + return err; + + frame_idx_enb_mask = 0; + } + } + + return 0; +} + +static void tegra_vde_mbe_set_0xa_reg(struct tegra_vde *vde, int reg, u32 val) +{ + VDE_WR(0xA0000000 | (reg << 24) | (val & 0xFFFF), vde->mbe + 0x80); + VDE_WR(0xA0000000 | ((reg + 1) << 24) | (val >> 16), vde->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->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->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->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->bsev + ICMDQUE_WR); + + return tegra_vde_wait_bsev(vde, wait_dma); +} + +static void tegra_vde_setup_frameid(struct tegra_vde *vde, + struct video_frame *frame, + unsigned int frameid, + u32 mbs_width, u32 mbs_height) +{ + u32 y_addr = frame ? frame->y_addr : 0xFCDEAD00; + u32 cb_addr = frame ? frame->cb_addr : 0xFCDEAD00; + u32 cr_addr = frame ? frame->cr_addr : 0xFCDEAD00; + u32 value1 = frame ? ((mbs_width << 16) | mbs_height) : 0; + u32 value2 = frame ? ((((mbs_width + 1) >> 1) << 6) | 1) : 0; + + VDE_WR(y_addr >> 8, vde->frameid + 0x000 + frameid * 4); + VDE_WR(cb_addr >> 8, vde->frameid + 0x100 + frameid * 4); + VDE_WR(cr_addr >> 8, vde->frameid + 0x180 + frameid * 4); + VDE_WR(value1, vde->frameid + 0x080 + frameid * 4); + VDE_WR(value2, vde->frameid + 0x280 + frameid * 4); +} + +static void tegra_setup_frameidx(struct tegra_vde *vde, + 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(vde, &frames[idx], idx, + mbs_width, mbs_height); + for (; idx < 17; idx++) + tegra_vde_setup_frameid(vde, NULL, idx, 0, 0); +} + +static void tegra_vde_setup_iram_entry(u32 *iram_tables, + unsigned int table, + unsigned int row, + u32 value1, u32 value2) +{ + pr_debug("IRAM table %u: row %u: 0x%08X 0x%08X\n", + table, row, value1, value2); + + iram_tables[0x20 * table + row * 2] = value1; + iram_tables[0x20 * table + row * 2 + 1] = value2; +} + +static void tegra_vde_setup_iram_tables(u32 *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_addr; + 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_addr = frame->aux_addr; + + 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_addr = 0xFADEAD00; + value = 0; + } + + tegra_vde_setup_iram_entry(iram_tables, 0, i, value, aux_addr); + tegra_vde_setup_iram_entry(iram_tables, 1, i, value, aux_addr); + tegra_vde_setup_iram_entry(iram_tables, 2, i, value, aux_addr); + tegra_vde_setup_iram_entry(iram_tables, 3, i, value, aux_addr); + } + + 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_addr = frame->aux_addr; + + 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_addr); + } + + for (k = 0; i < ref_frames_nb; i++, k++) { + frame = &dpb_frames[k + 1]; + + aux_addr = frame->aux_addr; + + 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_addr); + } +} + +static int tegra_vde_setup_hw_context(struct tegra_vde *vde, + struct tegra_vde_h264_decoder_ctx *ctx, + struct video_frame *dpb_frames, + dma_addr_t bitstream_data_addr, + size_t bitstream_data_size, + unsigned int macroblocks_nb) +{ + struct device *dev = vde->miscdev.parent; + u32 value; + int err; + + tegra_vde_set_bits(vde, 0x000A, vde->sxe + 0xF0); + tegra_vde_set_bits(vde, 0x000B, vde->bsev + CMDQUE_CONTROL); + tegra_vde_set_bits(vde, 0x8002, vde->mbe + 0x50); + tegra_vde_set_bits(vde, 0x000A, vde->mbe + 0xA0); + tegra_vde_set_bits(vde, 0x000A, vde->ppe + 0x14); + tegra_vde_set_bits(vde, 0x000A, vde->ppe + 0x28); + tegra_vde_set_bits(vde, 0x0A00, vde->mce + 0x08); + tegra_vde_set_bits(vde, 0x000A, vde->tfe + 0x00); + tegra_vde_set_bits(vde, 0x0005, vde->vdma + 0x04); + + VDE_WR(0x00000000, vde->vdma + 0x1C); + VDE_WR(0x00000000, vde->vdma + 0x00); + VDE_WR(0x00000007, vde->vdma + 0x04); + VDE_WR(0x00000007, vde->frameid + 0x200); + VDE_WR(0x00000005, vde->tfe + 0x04); + VDE_WR(0x00000000, vde->mbe + 0x84); + VDE_WR(0x00000010, vde->sxe + 0x08); + VDE_WR(0x00000150, vde->sxe + 0x54); + VDE_WR(0x0000054C, vde->sxe + 0x58); + VDE_WR(0x00000E34, vde->sxe + 0x5C); + VDE_WR(0x063C063C, vde->mce + 0x10); + VDE_WR(0x0003FC00, vde->bsev + INTR_STATUS); + VDE_WR(0x0000150D, vde->bsev + BSE_CONFIG); + VDE_WR(0x00000100, vde->bsev + BSE_INT_ENB); + VDE_WR(0x00000000, vde->bsev + 0x98); + VDE_WR(0x00000060, vde->bsev + 0x9C); + + memset(vde->iram + 128, 0, macroblocks_nb / 2); + + tegra_setup_frameidx(vde, 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); + wmb(); + + VDE_WR(0x00000000, vde->bsev + 0x8C); + VDE_WR(bitstream_data_addr + bitstream_data_size, + vde->bsev + 0x54); + + value = ctx->pic_width_in_mbs << 11 | ctx->pic_height_in_mbs << 3; + + VDE_WR(value, vde->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_addr + 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_addr >> 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->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->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->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->sxe + 0x48); + + value = 0x0C000000; + value |= !!(dpb_frames[0].flags & FLAG_B_FRAME) << 24; + + VDE_WR(value, vde->sxe + 0x4C); + + value = 0x03800000; + value |= min_t(size_t, bitstream_data_size, SZ_1M); + + VDE_WR(value, vde->sxe + 0x68); + + VDE_WR(bitstream_data_addr, vde->sxe + 0x6C); + + value = 0x10000005; + value |= ctx->pic_width_in_mbs << 11; + value |= ctx->pic_height_in_mbs << 3; + + VDE_WR(value, vde->mbe + 0x80); + + value = 0x26800000; + value |= ctx->level_idc << 4; + value |= !ctx->baseline_profile << 1; + value |= !!ctx->direct_8x8_inference_flag; + + VDE_WR(value, vde->mbe + 0x80); + + VDE_WR(0xF4000001, vde->mbe + 0x80); + VDE_WR(0x20000000, vde->mbe + 0x80); + VDE_WR(0xF4000101, vde->mbe + 0x80); + + value = 0x20000000; + value |= ctx->chroma_qp_index_offset << 8; + + VDE_WR(value, vde->mbe + 0x80); + + err = tegra_vde_setup_mbe_frame_idx(vde, + 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, 0, 0x000009FC); + tegra_vde_mbe_set_0xa_reg(vde, 2, 0xF1DEAD00); + tegra_vde_mbe_set_0xa_reg(vde, 4, 0xF2DEAD00); + tegra_vde_mbe_set_0xa_reg(vde, 6, 0xF3DEAD00); + tegra_vde_mbe_set_0xa_reg(vde, 8, dpb_frames[0].aux_addr); + + 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->mbe + 0x80); + + err = tegra_vde_wait_mbe(vde); + if (err) { + dev_err(dev, "MBE programming failed\n"); + return err; + } + + return 0; +} + +static void tegra_vde_decode_frame(struct tegra_vde *vde, + unsigned int macroblocks_nb) +{ + reinit_completion(&vde->decode_completion); + + VDE_WR(0x00000001, vde->bsev + 0x8C); + VDE_WR(0x20000000 | (macroblocks_nb - 1), vde->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, + dma_addr_t *addr, + 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 %zu @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; + } + + *addr = 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_addr, + &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_addr, + &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_addr, + &frame->cr_sgt, + NULL, dma_dir); + if (err) + goto err_release_cb; + + if (baseline_profile) { + frame->aux_addr = 0xF4DEAD00; + } else { + err = tegra_vde_attach_dmabuf(dev, source->aux_fd, + source->aux_offset, csize, + &frame->aux_dmabuf_attachment, + &frame->aux_addr, + &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_frame_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_validate_frame(struct device *dev, + struct tegra_vde_h264_frame *frame) +{ + 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 __user *frames_user; + struct tegra_vde_h264_frame *frames; + struct video_frame *dpb_frames; + struct dma_buf_attachment *bitstream_data_dmabuf_attachment; + struct sg_table *bitstream_sgt; + enum dma_data_direction dma_dir; + dma_addr_t bitstream_data_addr; + dma_addr_t bsev_ptr; + size_t bitstream_data_size; + unsigned int macroblocks_nb; + unsigned int read_bytes; + unsigned int i = 0; + 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_addr, + &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; + frames_user = u64_to_user_ptr(ctx.dpb_frames_ptr); + + frames = kmalloc_array(ctx.dpb_frames_nb, sizeof(*frames), GFP_KERNEL); + if (!frames) { + ret = -ENOMEM; + goto err_release_dpb_frames; + } + + if (copy_from_user(frames, frames_user, + ctx.dpb_frames_nb * sizeof(*frames))) { + ret = -EFAULT; + goto free_frames; + } + + for (i = 0; i < ctx.dpb_frames_nb; i++) { + ret = tegra_vde_validate_frame(dev, &frames[i]); + if (ret) + goto free_frames; + + dpb_frames[i].flags = frames[i].flags; + dpb_frames[i].frame_num = frames[i].frame_num; + + dma_dir = (i == 0) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; + + ret = tegra_vde_attach_dmabufs_to_frame(dev, &dpb_frames[i], + &frames[i], dma_dir, + ctx.baseline_profile, + macroblocks_nb * 64); + if (ret) + goto free_frames; + } + +free_frames: + kfree(frames); + + if (ret) + goto err_release_dpb_frames; + + 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_addr, + 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, + msecs_to_jiffies(1000)); + if (timeout) { + bsev_ptr = readl_relaxed(vde->bsev + 0x10); + macroblocks_nb = readl_relaxed(vde->sxe + 0xC8) & 0x1FFF; + read_bytes = bsev_ptr ? bsev_ptr - bitstream_data_addr : 0; + + dev_err(dev, "Decoding failed, " + "read 0x%X bytes : %u macroblocks parsed\n", + read_bytes, macroblocks_nb); + + ret = -EIO; + } + + reset_control_assert(vde->rst); + +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_frame_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, 0, vde->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 device *dev = &pdev->dev; + struct resource *regs; + struct tegra_vde *vde; + int irq, err; + + vde = devm_kzalloc(dev, sizeof(*vde), GFP_KERNEL); + if (!vde) + return -ENOMEM; + + platform_set_drvdata(pdev, vde); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sxe"); + if (!regs) + return -ENODEV; + + vde->sxe = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->sxe)) + return PTR_ERR(vde->sxe); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "bsev"); + if (!regs) + return -ENODEV; + + vde->bsev = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->bsev)) + return PTR_ERR(vde->bsev); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mbe"); + if (!regs) + return -ENODEV; + + vde->mbe = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->mbe)) + return PTR_ERR(vde->mbe); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ppe"); + if (!regs) + return -ENODEV; + + vde->ppe = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->ppe)) + return PTR_ERR(vde->ppe); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mce"); + if (!regs) + return -ENODEV; + + vde->mce = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->mce)) + return PTR_ERR(vde->mce); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tfe"); + if (!regs) + return -ENODEV; + + vde->tfe = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->tfe)) + return PTR_ERR(vde->tfe); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ppb"); + if (!regs) + return -ENODEV; + + vde->ppb = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->ppb)) + return PTR_ERR(vde->ppb); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vdma"); + if (!regs) + return -ENODEV; + + vde->vdma = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->vdma)) + return PTR_ERR(vde->vdma); + + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "frameid"); + if (!regs) + return -ENODEV; + + vde->frameid = devm_ioremap_resource(dev, regs); + if (IS_ERR(vde->frameid)) + return PTR_ERR(vde->frameid); + + vde->clk = devm_clk_get(dev, NULL); + if (IS_ERR(vde->clk)) { + err = PTR_ERR(vde->clk); + dev_err(dev, "Could not get VDE clk %d\n", err); + return err; + } + + vde->rst = devm_reset_control_get(dev, NULL); + if (IS_ERR(vde->rst)) { + err = PTR_ERR(vde->rst); + dev_err(dev, "Could not get VDE reset %d\n", err); + return err; + } + + irq = platform_get_irq_byname(pdev, "sync-token"); + if (irq < 0) + return irq; + + err = devm_request_irq(dev, irq, tegra_vde_isr, 0, + dev_name(dev), vde); + if (err) { + dev_err(dev, "Could not request IRQ %d\n", err); + return err; + } + + vde->iram_pool = of_gen_pool_get(dev->of_node, "iram", 0); + if (!vde->iram_pool) { + dev_err(dev, "Could not get IRAM pool\n"); + return -EPROBE_DEFER; + } + + vde->iram = gen_pool_dma_alloc(vde->iram_pool, 0x3FC00, + &vde->iram_lists_addr); + if (!vde->iram) { + dev_err(dev, "Could not reserve IRAM\n"); + return -ENOMEM; + } + + mutex_init(&vde->lock); + init_completion(&vde->decode_completion); + + 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); + goto err_gen_free; + } + + 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) + goto err_misc_unreg; + } + + return 0; + +err_misc_unreg: + misc_deregister(&vde->miscdev); + +err_gen_free: + gen_pool_free(vde->iram_pool, + (unsigned long)vde->iram, 0x3FC00); + + return err; +} + +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); + + gen_pool_free(vde->iram_pool, + (unsigned long)vde->iram, 0x3FC00); + + 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");