349 lines
10 KiB
C
349 lines
10 KiB
C
/*
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* Copyright (c) 2017 Lucas Stach, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions 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 it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <drm/drm_fourcc.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/genalloc.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <video/imx-ipu-v3.h>
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#include "ipu-prv.h"
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#define IPU_PRE_MAX_WIDTH 2048
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#define IPU_PRE_NUM_SCANLINES 8
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#define IPU_PRE_CTRL 0x000
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#define IPU_PRE_CTRL_SET 0x004
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#define IPU_PRE_CTRL_ENABLE (1 << 0)
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#define IPU_PRE_CTRL_BLOCK_EN (1 << 1)
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#define IPU_PRE_CTRL_BLOCK_16 (1 << 2)
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#define IPU_PRE_CTRL_SDW_UPDATE (1 << 4)
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#define IPU_PRE_CTRL_VFLIP (1 << 5)
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#define IPU_PRE_CTRL_SO (1 << 6)
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#define IPU_PRE_CTRL_INTERLACED_FIELD (1 << 7)
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#define IPU_PRE_CTRL_HANDSHAKE_EN (1 << 8)
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#define IPU_PRE_CTRL_HANDSHAKE_LINE_NUM(v) ((v & 0x3) << 9)
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#define IPU_PRE_CTRL_HANDSHAKE_ABORT_SKIP_EN (1 << 11)
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#define IPU_PRE_CTRL_EN_REPEAT (1 << 28)
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#define IPU_PRE_CTRL_TPR_REST_SEL (1 << 29)
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#define IPU_PRE_CTRL_CLKGATE (1 << 30)
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#define IPU_PRE_CTRL_SFTRST (1 << 31)
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#define IPU_PRE_CUR_BUF 0x030
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#define IPU_PRE_NEXT_BUF 0x040
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#define IPU_PRE_TPR_CTRL 0x070
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#define IPU_PRE_TPR_CTRL_TILE_FORMAT(v) ((v & 0xff) << 0)
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#define IPU_PRE_TPR_CTRL_TILE_FORMAT_MASK 0xff
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#define IPU_PRE_TPR_CTRL_TILE_FORMAT_16_BIT (1 << 0)
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#define IPU_PRE_TPR_CTRL_TILE_FORMAT_SPLIT_BUF (1 << 4)
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#define IPU_PRE_TPR_CTRL_TILE_FORMAT_SINGLE_BUF (1 << 5)
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#define IPU_PRE_TPR_CTRL_TILE_FORMAT_SUPER_TILED (1 << 6)
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#define IPU_PRE_PREFETCH_ENG_CTRL 0x080
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#define IPU_PRE_PREF_ENG_CTRL_PREFETCH_EN (1 << 0)
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#define IPU_PRE_PREF_ENG_CTRL_RD_NUM_BYTES(v) ((v & 0x7) << 1)
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#define IPU_PRE_PREF_ENG_CTRL_INPUT_ACTIVE_BPP(v) ((v & 0x3) << 4)
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#define IPU_PRE_PREF_ENG_CTRL_INPUT_PIXEL_FORMAT(v) ((v & 0x7) << 8)
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#define IPU_PRE_PREF_ENG_CTRL_SHIFT_BYPASS (1 << 11)
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#define IPU_PRE_PREF_ENG_CTRL_FIELD_INVERSE (1 << 12)
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#define IPU_PRE_PREF_ENG_CTRL_PARTIAL_UV_SWAP (1 << 14)
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#define IPU_PRE_PREF_ENG_CTRL_TPR_COOR_OFFSET_EN (1 << 15)
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#define IPU_PRE_PREFETCH_ENG_INPUT_SIZE 0x0a0
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#define IPU_PRE_PREFETCH_ENG_INPUT_SIZE_WIDTH(v) ((v & 0xffff) << 0)
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#define IPU_PRE_PREFETCH_ENG_INPUT_SIZE_HEIGHT(v) ((v & 0xffff) << 16)
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#define IPU_PRE_PREFETCH_ENG_PITCH 0x0d0
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#define IPU_PRE_PREFETCH_ENG_PITCH_Y(v) ((v & 0xffff) << 0)
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#define IPU_PRE_PREFETCH_ENG_PITCH_UV(v) ((v & 0xffff) << 16)
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#define IPU_PRE_STORE_ENG_CTRL 0x110
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#define IPU_PRE_STORE_ENG_CTRL_STORE_EN (1 << 0)
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#define IPU_PRE_STORE_ENG_CTRL_WR_NUM_BYTES(v) ((v & 0x7) << 1)
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#define IPU_PRE_STORE_ENG_CTRL_OUTPUT_ACTIVE_BPP(v) ((v & 0x3) << 4)
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#define IPU_PRE_STORE_ENG_STATUS 0x120
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#define IPU_PRE_STORE_ENG_STATUS_STORE_BLOCK_X_MASK 0xffff
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#define IPU_PRE_STORE_ENG_STATUS_STORE_BLOCK_X_SHIFT 0
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#define IPU_PRE_STORE_ENG_STATUS_STORE_BLOCK_Y_MASK 0x3fff
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#define IPU_PRE_STORE_ENG_STATUS_STORE_BLOCK_Y_SHIFT 16
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#define IPU_PRE_STORE_ENG_STATUS_STORE_FIFO_FULL (1 << 30)
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#define IPU_PRE_STORE_ENG_STATUS_STORE_FIELD (1 << 31)
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#define IPU_PRE_STORE_ENG_SIZE 0x130
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#define IPU_PRE_STORE_ENG_SIZE_INPUT_WIDTH(v) ((v & 0xffff) << 0)
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#define IPU_PRE_STORE_ENG_SIZE_INPUT_HEIGHT(v) ((v & 0xffff) << 16)
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#define IPU_PRE_STORE_ENG_PITCH 0x140
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#define IPU_PRE_STORE_ENG_PITCH_OUT_PITCH(v) ((v & 0xffff) << 0)
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#define IPU_PRE_STORE_ENG_ADDR 0x150
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struct ipu_pre {
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struct list_head list;
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struct device *dev;
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void __iomem *regs;
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struct clk *clk_axi;
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struct gen_pool *iram;
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dma_addr_t buffer_paddr;
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void *buffer_virt;
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bool in_use;
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unsigned int safe_window_end;
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unsigned int last_bufaddr;
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};
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static DEFINE_MUTEX(ipu_pre_list_mutex);
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static LIST_HEAD(ipu_pre_list);
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static int available_pres;
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int ipu_pre_get_available_count(void)
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{
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return available_pres;
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}
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struct ipu_pre *
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ipu_pre_lookup_by_phandle(struct device *dev, const char *name, int index)
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{
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struct device_node *pre_node = of_parse_phandle(dev->of_node,
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name, index);
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struct ipu_pre *pre;
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mutex_lock(&ipu_pre_list_mutex);
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list_for_each_entry(pre, &ipu_pre_list, list) {
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if (pre_node == pre->dev->of_node) {
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mutex_unlock(&ipu_pre_list_mutex);
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device_link_add(dev, pre->dev,
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DL_FLAG_AUTOREMOVE_CONSUMER);
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of_node_put(pre_node);
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return pre;
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}
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}
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mutex_unlock(&ipu_pre_list_mutex);
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of_node_put(pre_node);
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return NULL;
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}
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int ipu_pre_get(struct ipu_pre *pre)
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{
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u32 val;
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if (pre->in_use)
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return -EBUSY;
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/* first get the engine out of reset and remove clock gating */
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writel(0, pre->regs + IPU_PRE_CTRL);
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/* init defaults that should be applied to all streams */
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val = IPU_PRE_CTRL_HANDSHAKE_ABORT_SKIP_EN |
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IPU_PRE_CTRL_HANDSHAKE_EN |
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IPU_PRE_CTRL_TPR_REST_SEL |
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IPU_PRE_CTRL_SDW_UPDATE;
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writel(val, pre->regs + IPU_PRE_CTRL);
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pre->in_use = true;
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return 0;
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}
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void ipu_pre_put(struct ipu_pre *pre)
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{
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writel(IPU_PRE_CTRL_SFTRST, pre->regs + IPU_PRE_CTRL);
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pre->in_use = false;
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}
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void ipu_pre_configure(struct ipu_pre *pre, unsigned int width,
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unsigned int height, unsigned int stride, u32 format,
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uint64_t modifier, unsigned int bufaddr)
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{
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const struct drm_format_info *info = drm_format_info(format);
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u32 active_bpp = info->cpp[0] >> 1;
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u32 val;
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/* calculate safe window for ctrl register updates */
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if (modifier == DRM_FORMAT_MOD_LINEAR)
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pre->safe_window_end = height - 2;
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else
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pre->safe_window_end = DIV_ROUND_UP(height, 4) - 1;
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writel(bufaddr, pre->regs + IPU_PRE_CUR_BUF);
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writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF);
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pre->last_bufaddr = bufaddr;
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val = IPU_PRE_PREF_ENG_CTRL_INPUT_PIXEL_FORMAT(0) |
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IPU_PRE_PREF_ENG_CTRL_INPUT_ACTIVE_BPP(active_bpp) |
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IPU_PRE_PREF_ENG_CTRL_RD_NUM_BYTES(4) |
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IPU_PRE_PREF_ENG_CTRL_SHIFT_BYPASS |
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IPU_PRE_PREF_ENG_CTRL_PREFETCH_EN;
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writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_CTRL);
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val = IPU_PRE_PREFETCH_ENG_INPUT_SIZE_WIDTH(width) |
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IPU_PRE_PREFETCH_ENG_INPUT_SIZE_HEIGHT(height);
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writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_INPUT_SIZE);
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val = IPU_PRE_PREFETCH_ENG_PITCH_Y(stride);
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writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_PITCH);
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val = IPU_PRE_STORE_ENG_CTRL_OUTPUT_ACTIVE_BPP(active_bpp) |
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IPU_PRE_STORE_ENG_CTRL_WR_NUM_BYTES(4) |
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IPU_PRE_STORE_ENG_CTRL_STORE_EN;
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writel(val, pre->regs + IPU_PRE_STORE_ENG_CTRL);
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val = IPU_PRE_STORE_ENG_SIZE_INPUT_WIDTH(width) |
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IPU_PRE_STORE_ENG_SIZE_INPUT_HEIGHT(height);
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writel(val, pre->regs + IPU_PRE_STORE_ENG_SIZE);
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val = IPU_PRE_STORE_ENG_PITCH_OUT_PITCH(stride);
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writel(val, pre->regs + IPU_PRE_STORE_ENG_PITCH);
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writel(pre->buffer_paddr, pre->regs + IPU_PRE_STORE_ENG_ADDR);
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val = readl(pre->regs + IPU_PRE_TPR_CTRL);
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val &= ~IPU_PRE_TPR_CTRL_TILE_FORMAT_MASK;
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if (modifier != DRM_FORMAT_MOD_LINEAR) {
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/* only support single buffer formats for now */
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val |= IPU_PRE_TPR_CTRL_TILE_FORMAT_SINGLE_BUF;
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if (modifier == DRM_FORMAT_MOD_VIVANTE_SUPER_TILED)
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val |= IPU_PRE_TPR_CTRL_TILE_FORMAT_SUPER_TILED;
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if (info->cpp[0] == 2)
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val |= IPU_PRE_TPR_CTRL_TILE_FORMAT_16_BIT;
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}
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writel(val, pre->regs + IPU_PRE_TPR_CTRL);
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val = readl(pre->regs + IPU_PRE_CTRL);
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val |= IPU_PRE_CTRL_EN_REPEAT | IPU_PRE_CTRL_ENABLE |
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IPU_PRE_CTRL_SDW_UPDATE;
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if (modifier == DRM_FORMAT_MOD_LINEAR)
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val &= ~IPU_PRE_CTRL_BLOCK_EN;
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else
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val |= IPU_PRE_CTRL_BLOCK_EN;
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writel(val, pre->regs + IPU_PRE_CTRL);
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}
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void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr)
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{
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unsigned long timeout = jiffies + msecs_to_jiffies(5);
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unsigned short current_yblock;
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u32 val;
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if (bufaddr == pre->last_bufaddr)
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return;
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writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF);
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pre->last_bufaddr = bufaddr;
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do {
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if (time_after(jiffies, timeout)) {
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dev_warn(pre->dev, "timeout waiting for PRE safe window\n");
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return;
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}
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val = readl(pre->regs + IPU_PRE_STORE_ENG_STATUS);
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current_yblock =
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(val >> IPU_PRE_STORE_ENG_STATUS_STORE_BLOCK_Y_SHIFT) &
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IPU_PRE_STORE_ENG_STATUS_STORE_BLOCK_Y_MASK;
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} while (current_yblock == 0 || current_yblock >= pre->safe_window_end);
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writel(IPU_PRE_CTRL_SDW_UPDATE, pre->regs + IPU_PRE_CTRL_SET);
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}
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u32 ipu_pre_get_baddr(struct ipu_pre *pre)
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{
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return (u32)pre->buffer_paddr;
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}
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static int ipu_pre_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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struct ipu_pre *pre;
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pre = devm_kzalloc(dev, sizeof(*pre), GFP_KERNEL);
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if (!pre)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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pre->regs = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(pre->regs))
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return PTR_ERR(pre->regs);
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pre->clk_axi = devm_clk_get(dev, "axi");
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if (IS_ERR(pre->clk_axi))
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return PTR_ERR(pre->clk_axi);
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pre->iram = of_gen_pool_get(dev->of_node, "fsl,iram", 0);
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if (!pre->iram)
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return -EPROBE_DEFER;
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/*
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* Allocate IRAM buffer with maximum size. This could be made dynamic,
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* but as there is no other user of this IRAM region and we can fit all
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* max sized buffers into it, there is no need yet.
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*/
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pre->buffer_virt = gen_pool_dma_alloc(pre->iram, IPU_PRE_MAX_WIDTH *
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IPU_PRE_NUM_SCANLINES * 4,
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&pre->buffer_paddr);
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if (!pre->buffer_virt)
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return -ENOMEM;
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clk_prepare_enable(pre->clk_axi);
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pre->dev = dev;
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platform_set_drvdata(pdev, pre);
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mutex_lock(&ipu_pre_list_mutex);
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list_add(&pre->list, &ipu_pre_list);
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available_pres++;
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mutex_unlock(&ipu_pre_list_mutex);
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return 0;
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}
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static int ipu_pre_remove(struct platform_device *pdev)
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{
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struct ipu_pre *pre = platform_get_drvdata(pdev);
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mutex_lock(&ipu_pre_list_mutex);
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list_del(&pre->list);
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available_pres--;
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mutex_unlock(&ipu_pre_list_mutex);
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clk_disable_unprepare(pre->clk_axi);
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if (pre->buffer_virt)
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gen_pool_free(pre->iram, (unsigned long)pre->buffer_virt,
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IPU_PRE_MAX_WIDTH * IPU_PRE_NUM_SCANLINES * 4);
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return 0;
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}
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static const struct of_device_id ipu_pre_dt_ids[] = {
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{ .compatible = "fsl,imx6qp-pre", },
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{ /* sentinel */ },
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};
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struct platform_driver ipu_pre_drv = {
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.probe = ipu_pre_probe,
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.remove = ipu_pre_remove,
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.driver = {
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.name = "imx-ipu-pre",
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.of_match_table = ipu_pre_dt_ids,
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},
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};
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