1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <video/imx-ipu-v3.h>
15 #include "ipu-prv.h"
18 #define IPU_PRE_NUM_SCANLINES	8
22 #define  IPU_PRE_CTRL_ENABLE				(1 << 0)
23 #define  IPU_PRE_CTRL_BLOCK_EN				(1 << 1)
24 #define  IPU_PRE_CTRL_BLOCK_16				(1 << 2)
25 #define  IPU_PRE_CTRL_SDW_UPDATE			(1 << 4)
26 #define  IPU_PRE_CTRL_VFLIP				(1 << 5)
27 #define  IPU_PRE_CTRL_SO				(1 << 6)
28 #define  IPU_PRE_CTRL_INTERLACED_FIELD			(1 << 7)
29 #define  IPU_PRE_CTRL_HANDSHAKE_EN			(1 << 8)
30 #define  IPU_PRE_CTRL_HANDSHAKE_LINE_NUM(v)		((v & 0x3) << 9)  argument
31 #define  IPU_PRE_CTRL_HANDSHAKE_ABORT_SKIP_EN		(1 << 11)
32 #define  IPU_PRE_CTRL_EN_REPEAT				(1 << 28)
33 #define  IPU_PRE_CTRL_TPR_REST_SEL			(1 << 29)
34 #define  IPU_PRE_CTRL_CLKGATE				(1 << 30)
35 #define  IPU_PRE_CTRL_SFTRST				(1 << 31)
42 #define  IPU_PRE_TPR_CTRL_TILE_FORMAT(v)		((v & 0xff) << 0)  argument
44 #define  IPU_PRE_TPR_CTRL_TILE_FORMAT_16_BIT		(1 << 0)
45 #define  IPU_PRE_TPR_CTRL_TILE_FORMAT_SPLIT_BUF		(1 << 4)
46 #define  IPU_PRE_TPR_CTRL_TILE_FORMAT_SINGLE_BUF	(1 << 5)
47 #define  IPU_PRE_TPR_CTRL_TILE_FORMAT_SUPER_TILED	(1 << 6)
50 #define  IPU_PRE_PREF_ENG_CTRL_PREFETCH_EN		(1 << 0)
51 #define  IPU_PRE_PREF_ENG_CTRL_RD_NUM_BYTES(v)		((v & 0x7) << 1)  argument
52 #define  IPU_PRE_PREF_ENG_CTRL_INPUT_ACTIVE_BPP(v)	((v & 0x3) << 4)  argument
53 #define  IPU_PRE_PREF_ENG_CTRL_INPUT_PIXEL_FORMAT(v)	((v & 0x7) << 8)  argument
54 #define  IPU_PRE_PREF_ENG_CTRL_SHIFT_BYPASS		(1 << 11)
55 #define  IPU_PRE_PREF_ENG_CTRL_FIELD_INVERSE		(1 << 12)
56 #define  IPU_PRE_PREF_ENG_CTRL_PARTIAL_UV_SWAP		(1 << 14)
57 #define  IPU_PRE_PREF_ENG_CTRL_TPR_COOR_OFFSET_EN	(1 << 15)
60 #define  IPU_PRE_PREFETCH_ENG_INPUT_SIZE_WIDTH(v)	((v & 0xffff) << 0)  argument
61 #define  IPU_PRE_PREFETCH_ENG_INPUT_SIZE_HEIGHT(v)	((v & 0xffff) << 16)  argument
64 #define  IPU_PRE_PREFETCH_ENG_PITCH_Y(v)		((v & 0xffff) << 0)  argument
65 #define  IPU_PRE_PREFETCH_ENG_PITCH_UV(v)		((v & 0xffff) << 16)  argument
68 #define  IPU_PRE_STORE_ENG_CTRL_STORE_EN		(1 << 0)
69 #define  IPU_PRE_STORE_ENG_CTRL_WR_NUM_BYTES(v)		((v & 0x7) << 1)  argument
70 #define  IPU_PRE_STORE_ENG_CTRL_OUTPUT_ACTIVE_BPP(v)	((v & 0x3) << 4)  argument
77 #define  IPU_PRE_STORE_ENG_STATUS_STORE_FIFO_FULL	(1 << 30)
78 #define  IPU_PRE_STORE_ENG_STATUS_STORE_FIELD		(1 << 31)
81 #define  IPU_PRE_STORE_ENG_SIZE_INPUT_WIDTH(v)		((v & 0xffff) << 0)  argument
82 #define  IPU_PRE_STORE_ENG_SIZE_INPUT_HEIGHT(v)		((v & 0xffff) << 16)  argument
85 #define  IPU_PRE_STORE_ENG_PITCH_OUT_PITCH(v)		((v & 0xffff) << 0)  argument
116 	struct device_node *pre_node = of_parse_phandle(dev->of_node,  in ipu_pre_lookup_by_phandle()
122 		if (pre_node == pre->dev->of_node) {  in ipu_pre_lookup_by_phandle()
124 			device_link_add(dev, pre->dev,  in ipu_pre_lookup_by_phandle()
141 	if (pre->in_use)  in ipu_pre_get()
142 		return -EBUSY;  in ipu_pre_get()
145 	writel(0, pre->regs + IPU_PRE_CTRL);  in ipu_pre_get()
152 	writel(val, pre->regs + IPU_PRE_CTRL);  in ipu_pre_get()
154 	pre->in_use = true;  in ipu_pre_get()
160 	writel(IPU_PRE_CTRL_SFTRST, pre->regs + IPU_PRE_CTRL);  in ipu_pre_put()
162 	pre->in_use = false;  in ipu_pre_put()
170 	u32 active_bpp = info->cpp[0] >> 1;  in ipu_pre_configure()
175 		pre->safe_window_end = height - 2;  in ipu_pre_configure()
177 		pre->safe_window_end = DIV_ROUND_UP(height, 4) - 1;  in ipu_pre_configure()
179 	writel(bufaddr, pre->regs + IPU_PRE_CUR_BUF);  in ipu_pre_configure()
180 	writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF);  in ipu_pre_configure()
181 	pre->last_bufaddr = bufaddr;  in ipu_pre_configure()
188 	writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_CTRL);  in ipu_pre_configure()
192 	writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_INPUT_SIZE);  in ipu_pre_configure()
195 	writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_PITCH);  in ipu_pre_configure()
200 	writel(val, pre->regs + IPU_PRE_STORE_ENG_CTRL);  in ipu_pre_configure()
204 	writel(val, pre->regs + IPU_PRE_STORE_ENG_SIZE);  in ipu_pre_configure()
207 	writel(val, pre->regs + IPU_PRE_STORE_ENG_PITCH);  in ipu_pre_configure()
209 	writel(pre->buffer_paddr, pre->regs + IPU_PRE_STORE_ENG_ADDR);  in ipu_pre_configure()
211 	val = readl(pre->regs + IPU_PRE_TPR_CTRL);  in ipu_pre_configure()
218 		if (info->cpp[0] == 2)  in ipu_pre_configure()
221 	writel(val, pre->regs + IPU_PRE_TPR_CTRL);  in ipu_pre_configure()
223 	val = readl(pre->regs + IPU_PRE_CTRL);  in ipu_pre_configure()
230 	writel(val, pre->regs + IPU_PRE_CTRL);  in ipu_pre_configure()
239 	if (bufaddr == pre->last_bufaddr)  in ipu_pre_update()
242 	writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF);  in ipu_pre_update()
243 	pre->last_bufaddr = bufaddr;  in ipu_pre_update()
247 			dev_warn(pre->dev, "timeout waiting for PRE safe window\n");  in ipu_pre_update()
251 		val = readl(pre->regs + IPU_PRE_STORE_ENG_STATUS);  in ipu_pre_update()
255 	} while (current_yblock == 0 || current_yblock >= pre->safe_window_end);  in ipu_pre_update()
257 	writel(IPU_PRE_CTRL_SDW_UPDATE, pre->regs + IPU_PRE_CTRL_SET);  in ipu_pre_update()
262 	return !!(readl_relaxed(pre->regs + IPU_PRE_CTRL) &  in ipu_pre_update_pending()
268 	return (u32)pre->buffer_paddr;  in ipu_pre_get_baddr()
273 	struct device *dev = &pdev->dev;  in ipu_pre_probe()
278 		return -ENOMEM;  in ipu_pre_probe()
280 	pre->regs = devm_platform_ioremap_resource(pdev, 0);  in ipu_pre_probe()
281 	if (IS_ERR(pre->regs))  in ipu_pre_probe()
282 		return PTR_ERR(pre->regs);  in ipu_pre_probe()
284 	pre->clk_axi = devm_clk_get(dev, "axi");  in ipu_pre_probe()
285 	if (IS_ERR(pre->clk_axi))  in ipu_pre_probe()
286 		return PTR_ERR(pre->clk_axi);  in ipu_pre_probe()
288 	pre->iram = of_gen_pool_get(dev->of_node, "fsl,iram", 0);  in ipu_pre_probe()
289 	if (!pre->iram)  in ipu_pre_probe()
290 		return -EPROBE_DEFER;  in ipu_pre_probe()
294 	 * but as there is no other user of this IRAM region and we can fit all  in ipu_pre_probe()
295 	 * max sized buffers into it, there is no need yet.  in ipu_pre_probe()
297 	pre->buffer_virt = gen_pool_dma_alloc(pre->iram, IPU_PRE_MAX_WIDTH *  in ipu_pre_probe()
299 					      &pre->buffer_paddr);  in ipu_pre_probe()
300 	if (!pre->buffer_virt)  in ipu_pre_probe()
301 		return -ENOMEM;  in ipu_pre_probe()
303 	clk_prepare_enable(pre->clk_axi);  in ipu_pre_probe()
305 	pre->dev = dev;  in ipu_pre_probe()
308 	list_add(&pre->list, &ipu_pre_list);  in ipu_pre_probe()
320 	list_del(&pre->list);  in ipu_pre_remove()
321 	available_pres--;  in ipu_pre_remove()
324 	clk_disable_unprepare(pre->clk_axi);  in ipu_pre_remove()
326 	if (pre->buffer_virt)  in ipu_pre_remove()
327 		gen_pool_free(pre->iram, (unsigned long)pre->buffer_virt,  in ipu_pre_remove()
333 	{ .compatible = "fsl,imx6qp-pre", },
341 		.name	= "imx-ipu-pre",