示例#1
0
static int mipi_display_on(struct sh_mobile_lcdc_entity *entity)
{
	struct sh_mipi *mipi = to_sh_mipi(entity);
	struct sh_mipi_dsi_info *pdata = mipi->pdev->dev.platform_data;
	int ret;

	pm_runtime_get_sync(&mipi->pdev->dev);

	ret = pdata->set_dot_clock(mipi->pdev, mipi->base, 1);
	if (ret < 0)
		goto mipi_display_on_fail1;

	ret = sh_mipi_setup(mipi, &entity->def_mode);
	if (ret < 0)
		goto mipi_display_on_fail2;

	sh_mipi_dsi_enable(mipi, true);

	return SH_MOBILE_LCDC_DISPLAY_CONNECTED;

mipi_display_on_fail1:
	pm_runtime_put_sync(&mipi->pdev->dev);
mipi_display_on_fail2:
	pdata->set_dot_clock(mipi->pdev, mipi->base, 0);

	return ret;
}
示例#2
0
static int __init sh_mipi_probe(struct platform_device *pdev)
{
	struct sh_mipi *mipi;
	struct sh_mipi_dsi_info *pdata = pdev->dev.platform_data;
	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	unsigned long rate, f_current;
	int idx = pdev->id, ret;
	char dsip_clk[] = "dsi.p_clk";

	if (!res || idx >= ARRAY_SIZE(mipi_dsi) || !pdata)
		return -ENODEV;

	mutex_lock(&array_lock);
	if (idx < 0)
		for (idx = 0; idx < ARRAY_SIZE(mipi_dsi) && mipi_dsi[idx]; idx++)
			;

	if (idx == ARRAY_SIZE(mipi_dsi)) {
		ret = -EBUSY;
		goto efindslot;
	}

	mipi = kzalloc(sizeof(*mipi), GFP_KERNEL);
	if (!mipi) {
		ret = -ENOMEM;
		goto ealloc;
	}

	if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
		dev_err(&pdev->dev, "MIPI register region already claimed\n");
		ret = -EBUSY;
		goto ereqreg;
	}

	mipi->base = ioremap(res->start, resource_size(res));
	if (!mipi->base) {
		ret = -ENOMEM;
		goto emap;
	}

	mipi->dsit_clk = clk_get(&pdev->dev, "dsit_clk");
	if (IS_ERR(mipi->dsit_clk)) {
		ret = PTR_ERR(mipi->dsit_clk);
		goto eclktget;
	}

	f_current = clk_get_rate(mipi->dsit_clk);
	/* 80MHz required by the datasheet */
	rate = clk_round_rate(mipi->dsit_clk, 80000000);
	if (rate > 0 && rate != f_current)
		ret = clk_set_rate(mipi->dsit_clk, rate);
	else
		ret = rate;
	if (ret < 0)
		goto esettrate;

	dev_dbg(&pdev->dev, "DSI-T clk %lu -> %lu\n", f_current, rate);

	sprintf(dsip_clk, "dsi%1.1dp_clk", idx);
	mipi->dsip_clk = clk_get(&pdev->dev, dsip_clk);
	if (IS_ERR(mipi->dsip_clk)) {
		ret = PTR_ERR(mipi->dsip_clk);
		goto eclkpget;
	}

	f_current = clk_get_rate(mipi->dsip_clk);
	/* Between 10 and 50MHz */
	rate = clk_round_rate(mipi->dsip_clk, 24000000);
	if (rate > 0 && rate != f_current)
		ret = clk_set_rate(mipi->dsip_clk, rate);
	else
		ret = rate;
	if (ret < 0)
		goto esetprate;

	dev_dbg(&pdev->dev, "DSI-P clk %lu -> %lu\n", f_current, rate);

	msleep(10);

	ret = clk_enable(mipi->dsit_clk);
	if (ret < 0)
		goto eclkton;

	ret = clk_enable(mipi->dsip_clk);
	if (ret < 0)
		goto eclkpon;

	mipi_dsi[idx] = mipi;

	ret = sh_mipi_setup(mipi, pdata);
	if (ret < 0)
		goto emipisetup;

	mutex_unlock(&array_lock);
	platform_set_drvdata(pdev, mipi);

	/* Set up LCDC callbacks */
	pdata->lcd_chan->board_cfg.board_data = mipi;
	pdata->lcd_chan->board_cfg.display_on = mipi_display_on;
	pdata->lcd_chan->board_cfg.display_off = mipi_display_off;

	return 0;

emipisetup:
	mipi_dsi[idx] = NULL;
	clk_disable(mipi->dsip_clk);
eclkpon:
	clk_disable(mipi->dsit_clk);
eclkton:
esetprate:
	clk_put(mipi->dsip_clk);
eclkpget:
esettrate:
	clk_put(mipi->dsit_clk);
eclktget:
	iounmap(mipi->base);
emap:
	release_mem_region(res->start, resource_size(res));
ereqreg:
	kfree(mipi);
ealloc:
efindslot:
	mutex_unlock(&array_lock);

	return ret;
}