/*
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* i.MX6 Video Data Order Adapter (VDOA)
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*
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* Copyright (C) 2014 Philipp Zabel
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* Copyright (C) 2016 Pengutronix, Michael Tretter <kernel@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include <linux/videodev2.h>
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#include <linux/slab.h>
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#include "imx-vdoa.h"
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#define VDOA_NAME "imx-vdoa"
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#define VDOAC 0x00
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#define VDOASRR 0x04
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#define VDOAIE 0x08
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#define VDOAIST 0x0c
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#define VDOAFP 0x10
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#define VDOAIEBA00 0x14
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#define VDOAIEBA01 0x18
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#define VDOAIEBA02 0x1c
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#define VDOAIEBA10 0x20
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#define VDOAIEBA11 0x24
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#define VDOAIEBA12 0x28
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#define VDOASL 0x2c
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#define VDOAIUBO 0x30
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#define VDOAVEBA0 0x34
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#define VDOAVEBA1 0x38
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#define VDOAVEBA2 0x3c
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#define VDOAVUBO 0x40
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#define VDOASR 0x44
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#define VDOAC_ISEL BIT(6)
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#define VDOAC_PFS BIT(5)
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#define VDOAC_SO BIT(4)
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#define VDOAC_SYNC BIT(3)
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#define VDOAC_NF BIT(2)
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#define VDOAC_BNDM_MASK 0x3
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#define VDOAC_BAND_HEIGHT_8 0x0
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#define VDOAC_BAND_HEIGHT_16 0x1
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#define VDOAC_BAND_HEIGHT_32 0x2
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#define VDOASRR_START BIT(1)
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#define VDOASRR_SWRST BIT(0)
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#define VDOAIE_EITERR BIT(1)
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#define VDOAIE_EIEOT BIT(0)
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#define VDOAIST_TERR BIT(1)
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#define VDOAIST_EOT BIT(0)
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#define VDOAFP_FH_MASK (0x1fff << 16)
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#define VDOAFP_FW_MASK (0x3fff)
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#define VDOASL_VSLY_MASK (0x3fff << 16)
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#define VDOASL_ISLY_MASK (0x7fff)
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#define VDOASR_ERRW BIT(4)
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#define VDOASR_EOB BIT(3)
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#define VDOASR_CURRENT_FRAME (0x3 << 1)
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#define VDOASR_CURRENT_BUFFER BIT(1)
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enum {
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V4L2_M2M_SRC = 0,
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V4L2_M2M_DST = 1,
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};
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struct vdoa_data {
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struct vdoa_ctx *curr_ctx;
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struct device *dev;
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struct clk *vdoa_clk;
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void __iomem *regs;
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};
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struct vdoa_q_data {
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unsigned int width;
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unsigned int height;
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unsigned int bytesperline;
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unsigned int sizeimage;
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u32 pixelformat;
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};
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struct vdoa_ctx {
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struct vdoa_data *vdoa;
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struct completion completion;
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struct vdoa_q_data q_data[2];
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unsigned int submitted_job;
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unsigned int completed_job;
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};
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static irqreturn_t vdoa_irq_handler(int irq, void *data)
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{
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struct vdoa_data *vdoa = data;
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struct vdoa_ctx *curr_ctx;
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u32 val;
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/* Disable interrupts */
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writel(0, vdoa->regs + VDOAIE);
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curr_ctx = vdoa->curr_ctx;
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if (!curr_ctx) {
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dev_warn(vdoa->dev,
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"Instance released before the end of transaction\n");
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return IRQ_HANDLED;
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}
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val = readl(vdoa->regs + VDOAIST);
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writel(val, vdoa->regs + VDOAIST);
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if (val & VDOAIST_TERR) {
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val = readl(vdoa->regs + VDOASR) & VDOASR_ERRW;
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dev_err(vdoa->dev, "AXI %s error\n", val ? "write" : "read");
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} else if (!(val & VDOAIST_EOT)) {
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dev_warn(vdoa->dev, "Spurious interrupt\n");
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}
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curr_ctx->completed_job++;
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complete(&curr_ctx->completion);
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return IRQ_HANDLED;
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}
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int vdoa_wait_for_completion(struct vdoa_ctx *ctx)
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{
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struct vdoa_data *vdoa = ctx->vdoa;
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if (ctx->submitted_job == ctx->completed_job)
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return 0;
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if (!wait_for_completion_timeout(&ctx->completion,
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msecs_to_jiffies(300))) {
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dev_err(vdoa->dev,
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"Timeout waiting for transfer result\n");
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return -ETIMEDOUT;
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}
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return 0;
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}
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EXPORT_SYMBOL(vdoa_wait_for_completion);
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void vdoa_device_run(struct vdoa_ctx *ctx, dma_addr_t dst, dma_addr_t src)
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{
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struct vdoa_q_data *src_q_data, *dst_q_data;
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struct vdoa_data *vdoa = ctx->vdoa;
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u32 val;
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if (vdoa->curr_ctx)
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vdoa_wait_for_completion(vdoa->curr_ctx);
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vdoa->curr_ctx = ctx;
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reinit_completion(&ctx->completion);
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ctx->submitted_job++;
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src_q_data = &ctx->q_data[V4L2_M2M_SRC];
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dst_q_data = &ctx->q_data[V4L2_M2M_DST];
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/* Progressive, no sync, 1 frame per run */
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if (dst_q_data->pixelformat == V4L2_PIX_FMT_YUYV)
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val = VDOAC_PFS;
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else
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val = 0;
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writel(val, vdoa->regs + VDOAC);
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writel(dst_q_data->height << 16 | dst_q_data->width,
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vdoa->regs + VDOAFP);
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val = dst;
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writel(val, vdoa->regs + VDOAIEBA00);
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writel(src_q_data->bytesperline << 16 | dst_q_data->bytesperline,
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vdoa->regs + VDOASL);
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if (dst_q_data->pixelformat == V4L2_PIX_FMT_NV12 ||
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dst_q_data->pixelformat == V4L2_PIX_FMT_NV21)
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val = dst_q_data->bytesperline * dst_q_data->height;
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else
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val = 0;
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writel(val, vdoa->regs + VDOAIUBO);
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val = src;
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writel(val, vdoa->regs + VDOAVEBA0);
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val = round_up(src_q_data->bytesperline * src_q_data->height, 4096);
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writel(val, vdoa->regs + VDOAVUBO);
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/* Enable interrupts and start transfer */
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writel(VDOAIE_EITERR | VDOAIE_EIEOT, vdoa->regs + VDOAIE);
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writel(VDOASRR_START, vdoa->regs + VDOASRR);
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}
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EXPORT_SYMBOL(vdoa_device_run);
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struct vdoa_ctx *vdoa_context_create(struct vdoa_data *vdoa)
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{
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struct vdoa_ctx *ctx;
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int err;
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return NULL;
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err = clk_prepare_enable(vdoa->vdoa_clk);
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if (err) {
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kfree(ctx);
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return NULL;
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}
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init_completion(&ctx->completion);
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ctx->vdoa = vdoa;
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return ctx;
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}
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EXPORT_SYMBOL(vdoa_context_create);
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void vdoa_context_destroy(struct vdoa_ctx *ctx)
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{
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struct vdoa_data *vdoa = ctx->vdoa;
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if (vdoa->curr_ctx == ctx) {
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vdoa_wait_for_completion(vdoa->curr_ctx);
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vdoa->curr_ctx = NULL;
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}
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clk_disable_unprepare(vdoa->vdoa_clk);
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kfree(ctx);
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}
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EXPORT_SYMBOL(vdoa_context_destroy);
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int vdoa_context_configure(struct vdoa_ctx *ctx,
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unsigned int width, unsigned int height,
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u32 pixelformat)
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{
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struct vdoa_q_data *src_q_data;
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struct vdoa_q_data *dst_q_data;
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if (width < 16 || width > 8192 || width % 16 != 0 ||
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height < 16 || height > 4096 || height % 16 != 0)
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return -EINVAL;
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if (pixelformat != V4L2_PIX_FMT_YUYV &&
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pixelformat != V4L2_PIX_FMT_NV12)
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return -EINVAL;
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/* If no context is passed, only check if the format is valid */
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if (!ctx)
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return 0;
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src_q_data = &ctx->q_data[V4L2_M2M_SRC];
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dst_q_data = &ctx->q_data[V4L2_M2M_DST];
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src_q_data->width = width;
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src_q_data->height = height;
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src_q_data->bytesperline = width;
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src_q_data->sizeimage =
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round_up(src_q_data->bytesperline * height, 4096) +
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src_q_data->bytesperline * height / 2;
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dst_q_data->width = width;
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dst_q_data->height = height;
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dst_q_data->pixelformat = pixelformat;
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switch (pixelformat) {
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case V4L2_PIX_FMT_YUYV:
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dst_q_data->bytesperline = width * 2;
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dst_q_data->sizeimage = dst_q_data->bytesperline * height;
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break;
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case V4L2_PIX_FMT_NV12:
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default:
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dst_q_data->bytesperline = width;
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dst_q_data->sizeimage =
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dst_q_data->bytesperline * height * 3 / 2;
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL(vdoa_context_configure);
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static int vdoa_probe(struct platform_device *pdev)
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{
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struct vdoa_data *vdoa;
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struct resource *res;
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int ret;
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ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
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if (ret) {
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dev_err(&pdev->dev, "DMA enable failed\n");
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return ret;
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}
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vdoa = devm_kzalloc(&pdev->dev, sizeof(*vdoa), GFP_KERNEL);
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if (!vdoa)
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return -ENOMEM;
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vdoa->dev = &pdev->dev;
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vdoa->vdoa_clk = devm_clk_get(vdoa->dev, NULL);
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if (IS_ERR(vdoa->vdoa_clk)) {
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dev_err(vdoa->dev, "Failed to get clock\n");
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return PTR_ERR(vdoa->vdoa_clk);
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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vdoa->regs = devm_ioremap_resource(vdoa->dev, res);
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if (IS_ERR(vdoa->regs))
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return PTR_ERR(vdoa->regs);
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res)
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return -EINVAL;
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ret = devm_request_threaded_irq(&pdev->dev, res->start, NULL,
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vdoa_irq_handler, IRQF_ONESHOT,
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"vdoa", vdoa);
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if (ret < 0) {
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dev_err(vdoa->dev, "Failed to get irq\n");
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return ret;
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}
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platform_set_drvdata(pdev, vdoa);
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return 0;
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}
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static int vdoa_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static const struct of_device_id vdoa_dt_ids[] = {
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{ .compatible = "fsl,imx6q-vdoa" },
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{}
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};
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MODULE_DEVICE_TABLE(of, vdoa_dt_ids);
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static struct platform_driver vdoa_driver = {
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.probe = vdoa_probe,
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.remove = vdoa_remove,
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.driver = {
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.name = VDOA_NAME,
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.of_match_table = vdoa_dt_ids,
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},
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};
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module_platform_driver(vdoa_driver);
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MODULE_DESCRIPTION("Video Data Order Adapter");
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MODULE_AUTHOR("Philipp Zabel <philipp.zabel@gmail.com>");
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MODULE_ALIAS("platform:imx-vdoa");
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MODULE_LICENSE("GPL");
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