[PATCH v5 1/1] video: drm: exynos: Add display-timing node parsing using video helper function

[Vikas Sajjan]

Add support for parsing the display-timing node using video helper
function.

The DT node parsing and pinctrl selection is done only if 'dev.of_node'
exists and the NON-DT logic is still maintained under the 'else' part.

Signed-off-by: Leela Krishna Amudala <l.kris...@samsung.com>
Signed-off-by: Vikas Sajjan <vikas.saj...@linaro.org>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c |   41 +++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c 
b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index bf0d9ba..978e866 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -19,6 +19,7 @@
 #include <linux/clk.h>
 #include <linux/of_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/pinctrl/consumer.h>
 
 #include <video/samsung_fimd.h>
 #include <drm/exynos_drm.h>
@@ -905,16 +906,48 @@ static int __devinit fimd_probe(struct platform_device 
*pdev)
        struct exynos_drm_subdrv *subdrv;
        struct exynos_drm_fimd_pdata *pdata;
        struct exynos_drm_panel_info *panel;
+       struct fb_videomode *fbmode;
+       struct pinctrl *pctrl;
        struct resource *res;
        int win;
        int ret = -EINVAL;
 
        DRM_DEBUG_KMS("%s\n", __FILE__);
 
-       pdata = pdev->dev.platform_data;
-       if (!pdata) {
-               dev_err(dev, "no platform data specified\n");
-               return -EINVAL;
+       if (pdev->dev.of_node) {
+               pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+               if (!pdata) {
+                       DRM_ERROR("memory allocation for pdata failed\n");
+                       return -ENOMEM;
+               }
+
+               fbmode = devm_kzalloc(dev, sizeof(*fbmode), GFP_KERNEL);
+               if (!fbmode) {
+                       DRM_ERROR("memory allocation for fbmode failed\n");
+                       return -ENOMEM;
+               }
+
+               ret = of_get_fb_videomode(dev->of_node, fbmode, -1);
+               if (ret) {
+                       DRM_ERROR("failed: of_get_fb_videomode()\n"
+                               "with return value: %d\n", ret);
+                       return ret;
+               }
+               pdata->panel.timing = (struct fb_videomode) *fbmode;
+
+               pctrl = devm_pinctrl_get_select_default(dev);
+               if (IS_ERR_OR_NULL(pctrl)) {
+                       DRM_ERROR("failed: devm_pinctrl_get_select_default()\n"
+                               "with return value: %d\n", PTR_RET(pctrl));
+                       return PTR_RET(pctrl);
+               }
+
+       } else {
+               pdata = pdev->dev.platform_data;
+               if (!pdata) {
+                       DRM_ERROR("no platform data specified\n");
+                       return -EINVAL;
+               }
        }
 
        panel = &pdata->panel;
-- 
1.7.9.5

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