118 	struct ipu_pre *pre;  in ipu_pre_lookup_by_phandle()  local
121 	list_for_each_entry(pre, &ipu_pre_list, list) {  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()
127 			return pre;  in ipu_pre_lookup_by_phandle()
137 int ipu_pre_get(struct ipu_pre *pre)  in ipu_pre_get()  argument
141 	if (pre->in_use)  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()
158 void ipu_pre_put(struct ipu_pre *pre)  in ipu_pre_put()  argument
160 	writel(IPU_PRE_CTRL_SFTRST, pre->regs + IPU_PRE_CTRL);  in ipu_pre_put()
162 	pre->in_use = false;  in ipu_pre_put()
165 void ipu_pre_configure(struct ipu_pre *pre, unsigned int width,  in ipu_pre_configure()  argument
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()
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()
233 void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr)  in ipu_pre_update()  argument
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()
260 bool ipu_pre_update_pending(struct ipu_pre *pre)  in ipu_pre_update_pending()  argument
262 	return !!(readl_relaxed(pre->regs + IPU_PRE_CTRL) &  in ipu_pre_update_pending()
266 u32 ipu_pre_get_baddr(struct ipu_pre *pre)  in ipu_pre_get_baddr()  argument
268 	return (u32)pre->buffer_paddr;  in ipu_pre_get_baddr()
274 	struct ipu_pre *pre;  in ipu_pre_probe()  local
276 	pre = devm_kzalloc(dev, sizeof(*pre), GFP_KERNEL);  in ipu_pre_probe()
277 	if (!pre)  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()
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()
303 	clk_prepare_enable(pre->clk_axi);  in ipu_pre_probe()
305 	pre->dev = dev;  in ipu_pre_probe()
306 	platform_set_drvdata(pdev, pre);  in ipu_pre_probe()
308 	list_add(&pre->list, &ipu_pre_list);  in ipu_pre_probe()
317 	struct ipu_pre *pre = platform_get_drvdata(pdev);  in ipu_pre_remove()  local
320 	list_del(&pre->list);  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",