125 	struct ipu_pre *pre;  in ipu_pre_lookup_by_phandle()  local
128 	list_for_each_entry(pre, &ipu_pre_list, list) {  in ipu_pre_lookup_by_phandle()
129 		if (pre_node == pre->dev->of_node) {  in ipu_pre_lookup_by_phandle()
131 			device_link_add(dev, pre->dev,  in ipu_pre_lookup_by_phandle()
134 			return pre;  in ipu_pre_lookup_by_phandle()
144 int ipu_pre_get(struct ipu_pre *pre)  in ipu_pre_get()  argument
148 	if (pre->in_use)  in ipu_pre_get()
152 	writel(0, pre->regs + IPU_PRE_CTRL);  in ipu_pre_get()
159 	writel(val, pre->regs + IPU_PRE_CTRL);  in ipu_pre_get()
161 	pre->in_use = true;  in ipu_pre_get()
165 void ipu_pre_put(struct ipu_pre *pre)  in ipu_pre_put()  argument
167 	writel(IPU_PRE_CTRL_SFTRST, pre->regs + IPU_PRE_CTRL);  in ipu_pre_put()
169 	pre->in_use = false;  in ipu_pre_put()
172 void ipu_pre_configure(struct ipu_pre *pre, unsigned int width,  in ipu_pre_configure()  argument
182 		pre->safe_window_end = height - 2;  in ipu_pre_configure()
184 		pre->safe_window_end = DIV_ROUND_UP(height, 4) - 1;  in ipu_pre_configure()
186 	writel(bufaddr, pre->regs + IPU_PRE_CUR_BUF);  in ipu_pre_configure()
187 	writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF);  in ipu_pre_configure()
194 	writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_CTRL);  in ipu_pre_configure()
198 	writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_INPUT_SIZE);  in ipu_pre_configure()
201 	writel(val, pre->regs + IPU_PRE_PREFETCH_ENG_PITCH);  in ipu_pre_configure()
206 	writel(val, pre->regs + IPU_PRE_STORE_ENG_CTRL);  in ipu_pre_configure()
210 	writel(val, pre->regs + IPU_PRE_STORE_ENG_SIZE);  in ipu_pre_configure()
213 	writel(val, pre->regs + IPU_PRE_STORE_ENG_PITCH);  in ipu_pre_configure()
215 	writel(pre->buffer_paddr, pre->regs + IPU_PRE_STORE_ENG_ADDR);  in ipu_pre_configure()
217 	val = readl(pre->regs + IPU_PRE_TPR_CTRL);  in ipu_pre_configure()
227 	writel(val, pre->regs + IPU_PRE_TPR_CTRL);  in ipu_pre_configure()
229 	val = readl(pre->regs + IPU_PRE_CTRL);  in ipu_pre_configure()
236 	writel(val, pre->regs + IPU_PRE_CTRL);  in ipu_pre_configure()
239 void ipu_pre_update(struct ipu_pre *pre, unsigned int bufaddr)  in ipu_pre_update()  argument
245 	writel(bufaddr, pre->regs + IPU_PRE_NEXT_BUF);  in ipu_pre_update()
249 			dev_warn(pre->dev, "timeout waiting for PRE safe window\n");  in ipu_pre_update()
253 		val = readl(pre->regs + IPU_PRE_STORE_ENG_STATUS);  in ipu_pre_update()
257 	} while (current_yblock == 0 || current_yblock >= pre->safe_window_end);  in ipu_pre_update()
259 	writel(IPU_PRE_CTRL_SDW_UPDATE, pre->regs + IPU_PRE_CTRL_SET);  in ipu_pre_update()
262 u32 ipu_pre_get_baddr(struct ipu_pre *pre)  in ipu_pre_get_baddr()  argument
264 	return (u32)pre->buffer_paddr;  in ipu_pre_get_baddr()
271 	struct ipu_pre *pre;  in ipu_pre_probe()  local
273 	pre = devm_kzalloc(dev, sizeof(*pre), GFP_KERNEL);  in ipu_pre_probe()
274 	if (!pre)  in ipu_pre_probe()
278 	pre->regs = devm_ioremap_resource(&pdev->dev, res);  in ipu_pre_probe()
279 	if (IS_ERR(pre->regs))  in ipu_pre_probe()
280 		return PTR_ERR(pre->regs);  in ipu_pre_probe()
282 	pre->clk_axi = devm_clk_get(dev, "axi");  in ipu_pre_probe()
283 	if (IS_ERR(pre->clk_axi))  in ipu_pre_probe()
284 		return PTR_ERR(pre->clk_axi);  in ipu_pre_probe()
286 	pre->iram = of_gen_pool_get(dev->of_node, "fsl,iram", 0);  in ipu_pre_probe()
287 	if (!pre->iram)  in ipu_pre_probe()
295 	pre->buffer_virt = gen_pool_dma_alloc(pre->iram, IPU_PRE_MAX_WIDTH *  in ipu_pre_probe()
297 					      &pre->buffer_paddr);  in ipu_pre_probe()
298 	if (!pre->buffer_virt)  in ipu_pre_probe()
301 	clk_prepare_enable(pre->clk_axi);  in ipu_pre_probe()
303 	pre->dev = dev;  in ipu_pre_probe()
304 	platform_set_drvdata(pdev, pre);  in ipu_pre_probe()
306 	list_add(&pre->list, &ipu_pre_list);  in ipu_pre_probe()
315 	struct ipu_pre *pre = platform_get_drvdata(pdev);  in ipu_pre_remove()  local
318 	list_del(&pre->list);  in ipu_pre_remove()
322 	clk_disable_unprepare(pre->clk_axi);  in ipu_pre_remove()
324 	if (pre->buffer_virt)  in ipu_pre_remove()
325 		gen_pool_free(pre->iram, (unsigned long)pre->buffer_virt,  in ipu_pre_remove()