drm/exynos: fimd: get signal polarities from device tree

The patch adds code to get signal polarization setting
from device tree display-timings node.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index a183ea7dbd55..6afcaf164549 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -915,6 +915,15 @@ static int fimd_probe(struct platform_device *pdev)
                         DRM_ERROR("failed: of_get_videomode() : %d\n", ret);
                         return ret;
                 }
+
+                if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW)
+                        pdata->vidcon1 |= VIDCON1_INV_VSYNC;
+                if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW)
+                        pdata->vidcon1 |= VIDCON1_INV_HSYNC;
+                if (vm->flags & DISPLAY_FLAGS_DE_LOW)
+                        pdata->vidcon1 |= VIDCON1_INV_VDEN;
+                if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+                        pdata->vidcon1 |= VIDCON1_INV_VCLK;
         } else {
                 pdata = dev->platform_data;
                 if (!pdata) {