video: exynos_dp: Add device tree support to DP driver
This patch enables device tree based discovery support for DP driver. The driver is modified to handle platform data in both the cases: with DT and non-DT. Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com> Signed-off-by: Jingoo Han <jg1.han@samsung.com>
This commit is contained in:
Ajay Kumar
Jingoo Han
parent
f4a75d2eb7
commit
c4e235c2ad
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@ -18,6 +18,7 @@
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/of.h>
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#include <video/exynos_dp.h>
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@ -856,6 +857,145 @@ static irqreturn_t exynos_dp_irq_handler(int irq, void *arg)
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return IRQ_HANDLED;
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}
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#ifdef CONFIG_OF
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static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
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{
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struct device_node *dp_node = dev->of_node;
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struct exynos_dp_platdata *pd;
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struct video_info *dp_video_config;
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pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
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if (!pd) {
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dev_err(dev, "memory allocation for pdata failed\n");
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return ERR_PTR(-ENOMEM);
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}
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dp_video_config = devm_kzalloc(dev,
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sizeof(*dp_video_config), GFP_KERNEL);
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if (!dp_video_config) {
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dev_err(dev, "memory allocation for video config failed\n");
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return ERR_PTR(-ENOMEM);
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}
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pd->video_info = dp_video_config;
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dp_video_config->h_sync_polarity =
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of_property_read_bool(dp_node, "hsync-active-high");
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dp_video_config->v_sync_polarity =
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of_property_read_bool(dp_node, "vsync-active-high");
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dp_video_config->interlaced =
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of_property_read_bool(dp_node, "interlaced");
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if (of_property_read_u32(dp_node, "samsung,color-space",
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&dp_video_config->color_space)) {
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dev_err(dev, "failed to get color-space\n");
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return ERR_PTR(-EINVAL);
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}
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if (of_property_read_u32(dp_node, "samsung,dynamic-range",
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&dp_video_config->dynamic_range)) {
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dev_err(dev, "failed to get dynamic-range\n");
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return ERR_PTR(-EINVAL);
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}
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if (of_property_read_u32(dp_node, "samsung,ycbcr-coeff",
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&dp_video_config->ycbcr_coeff)) {
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dev_err(dev, "failed to get ycbcr-coeff\n");
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return ERR_PTR(-EINVAL);
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}
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if (of_property_read_u32(dp_node, "samsung,color-depth",
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&dp_video_config->color_depth)) {
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dev_err(dev, "failed to get color-depth\n");
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return ERR_PTR(-EINVAL);
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}
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if (of_property_read_u32(dp_node, "samsung,link-rate",
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&dp_video_config->link_rate)) {
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dev_err(dev, "failed to get link-rate\n");
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return ERR_PTR(-EINVAL);
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}
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if (of_property_read_u32(dp_node, "samsung,lane-count",
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&dp_video_config->lane_count)) {
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dev_err(dev, "failed to get lane-count\n");
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return ERR_PTR(-EINVAL);
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}
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return pd;
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}
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static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
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{
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struct device_node *dp_phy_node;
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u32 phy_base;
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dp_phy_node = of_find_node_by_name(dp->dev->of_node, "dptx-phy");
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if (!dp_phy_node) {
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dev_err(dp->dev, "could not find dptx-phy node\n");
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return -ENODEV;
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}
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if (of_property_read_u32(dp_phy_node, "reg", &phy_base)) {
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dev_err(dp->dev, "faild to get reg for dptx-phy\n");
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return -EINVAL;
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}
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if (of_property_read_u32(dp_phy_node, "samsung,enable-mask",
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&dp->enable_mask)) {
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dev_err(dp->dev, "faild to get enable-mask for dptx-phy\n");
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return -EINVAL;
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}
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dp->phy_addr = ioremap(phy_base, SZ_4);
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if (!dp->phy_addr) {
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dev_err(dp->dev, "failed to ioremap dp-phy\n");
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return -ENOMEM;
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}
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return 0;
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}
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static void exynos_dp_phy_init(struct exynos_dp_device *dp)
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{
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u32 reg;
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reg = __raw_readl(dp->phy_addr);
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reg |= dp->enable_mask;
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__raw_writel(reg, dp->phy_addr);
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}
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static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
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{
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u32 reg;
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reg = __raw_readl(dp->phy_addr);
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reg &= ~(dp->enable_mask);
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__raw_writel(reg, dp->phy_addr);
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}
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#else
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static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
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{
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return NULL;
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}
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static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
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{
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return -EINVAL;
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}
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static void exynos_dp_phy_init(struct exynos_dp_device *dp)
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{
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return;
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}
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static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
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{
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return;
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}
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#endif /* CONFIG_OF */
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static int __devinit exynos_dp_probe(struct platform_device *pdev)
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{
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struct resource *res;
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@ -864,12 +1004,6 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
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int ret = 0;
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pdata = pdev->dev.platform_data;
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if (!pdata) {
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dev_err(&pdev->dev, "no platform data\n");
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return -EINVAL;
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}
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dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
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GFP_KERNEL);
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if (!dp) {
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@ -879,6 +1013,22 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
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dp->dev = &pdev->dev;
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if (pdev->dev.of_node) {
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pdata = exynos_dp_dt_parse_pdata(&pdev->dev);
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if (IS_ERR(pdata))
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return PTR_ERR(pdata);
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ret = exynos_dp_dt_parse_phydata(dp);
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if (ret)
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return ret;
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} else {
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pdata = pdev->dev.platform_data;
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if (!pdata) {
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dev_err(&pdev->dev, "no platform data\n");
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return -EINVAL;
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}
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}
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dp->clock = devm_clk_get(&pdev->dev, "dp");
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if (IS_ERR(dp->clock)) {
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dev_err(&pdev->dev, "failed to get clock\n");
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@ -909,8 +1059,14 @@ static int __devinit exynos_dp_probe(struct platform_device *pdev)
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}
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dp->video_info = pdata->video_info;
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if (pdata->phy_init)
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pdata->phy_init();
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if (pdev->dev.of_node) {
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if (dp->phy_addr)
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exynos_dp_phy_init(dp);
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} else {
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if (pdata->phy_init)
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pdata->phy_init();
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}
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exynos_dp_init_dp(dp);
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@ -953,8 +1109,13 @@ static int __devexit exynos_dp_remove(struct platform_device *pdev)
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struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
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struct exynos_dp_device *dp = platform_get_drvdata(pdev);
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if (pdata && pdata->phy_exit)
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pdata->phy_exit();
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if (pdev->dev.of_node) {
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if (dp->phy_addr)
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exynos_dp_phy_exit(dp);
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} else {
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if (pdata->phy_exit)
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pdata->phy_exit();
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}
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clk_disable_unprepare(dp->clock);
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@ -964,12 +1125,16 @@ static int __devexit exynos_dp_remove(struct platform_device *pdev)
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#ifdef CONFIG_PM_SLEEP
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static int exynos_dp_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
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struct exynos_dp_device *dp = platform_get_drvdata(pdev);
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struct exynos_dp_platdata *pdata = dev->platform_data;
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struct exynos_dp_device *dp = dev_get_drvdata(dev);
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if (pdata && pdata->phy_exit)
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pdata->phy_exit();
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if (dev->of_node) {
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if (dp->phy_addr)
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exynos_dp_phy_exit(dp);
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} else {
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if (pdata->phy_exit)
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pdata->phy_exit();
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}
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clk_disable_unprepare(dp->clock);
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@ -978,12 +1143,16 @@ static int exynos_dp_suspend(struct device *dev)
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static int exynos_dp_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
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struct exynos_dp_device *dp = platform_get_drvdata(pdev);
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struct exynos_dp_platdata *pdata = dev->platform_data;
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struct exynos_dp_device *dp = dev_get_drvdata(dev);
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if (pdata && pdata->phy_init)
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pdata->phy_init();
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if (dev->of_node) {
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if (dp->phy_addr)
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exynos_dp_phy_init(dp);
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} else {
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if (pdata->phy_init)
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pdata->phy_init();
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}
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clk_prepare_enable(dp->clock);
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@ -1013,6 +1182,12 @@ static const struct dev_pm_ops exynos_dp_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(exynos_dp_suspend, exynos_dp_resume)
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};
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static const struct of_device_id exynos_dp_match[] = {
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{ .compatible = "samsung,exynos5-dp" },
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{},
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};
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MODULE_DEVICE_TABLE(of, exynos_dp_match);
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static struct platform_driver exynos_dp_driver = {
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.probe = exynos_dp_probe,
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.remove = __devexit_p(exynos_dp_remove),
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@ -1020,6 +1195,7 @@ static struct platform_driver exynos_dp_driver = {
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.name = "exynos-dp",
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.owner = THIS_MODULE,
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.pm = &exynos_dp_pm_ops,
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.of_match_table = of_match_ptr(exynos_dp_match),
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},
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};
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@ -29,6 +29,8 @@ struct exynos_dp_device {
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struct clk *clock;
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unsigned int irq;
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void __iomem *reg_base;
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void __iomem *phy_addr;
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unsigned int enable_mask;
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struct video_info *video_info;
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struct link_train link_train;
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