From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tomasz Figa <tomasz.figa@gmail.com>
Subject: [PATCH] drm/exynos: fimd: Get signal polarities from device tree
Date: Wed,  1 May 2013 21:06:09 +0200
Message-ID: <1367435169-15025-1-git-send-email-tomasz.figa@gmail.com>
Return-path: <linux-samsung-soc-owner@vger.kernel.org>
Sender: linux-samsung-soc-owner@vger.kernel.org
To: dri-devel@lists.freedesktop.org
Cc: linux-samsung-soc@vger.kernel.org, inki.dae@samsung.com, jy0922.shim@samsung.com, t.figa@samsung.com, Tomasz Figa <tomasz.figa@gmail.com>
List-Id: dri-devel@lists.freedesktop.org

This patch modifies the driver to perform two stage parsing of video
timings from device tree, to get timing information as struct videomode,
which contains more data than struct fb_videomode.

Thanks to this change, information about polarity of control signals
(VSYNC, HSYNC, VDEN, VCLK) can be retrieved, in addition to standard
video timings.

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index a1669d4..9023efa 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -21,7 +21,9 @@
 #include <linux/pm_runtime.h>
 
 #include <video/of_display_timing.h>
+#include <video/of_videomode.h>
 #include <video/samsung_fimd.h>
+#include <video/videomode.h>
 #include <drm/exynos_drm.h>
 
 #include "exynos_drm_drv.h"
@@ -928,18 +930,30 @@ static int fimd_probe(struct platform_device *pdev)
 	DRM_DEBUG_KMS("%s\n", __FILE__);
 
 	if (pdev->dev.of_node) {
+		struct videomode vm;
+
 		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 		if (!pdata) {
 			DRM_ERROR("memory allocation for pdata failed\n");
 			return -ENOMEM;
 		}
 
-		ret = of_get_fb_videomode(dev->of_node, &pdata->panel.timing,
-					OF_USE_NATIVE_MODE);
+		ret = of_get_videomode(dev->of_node, &vm, OF_USE_NATIVE_MODE);
 		if (ret) {
 			DRM_ERROR("failed: of_get_fb_videomode() : %d\n", ret);
 			return ret;
 		}
+
+		fb_videomode_from_videomode(&vm, &pdata->panel.timing);
+
+		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 = pdev->dev.platform_data;
 		if (!pdata) {
-- 
1.8.2.1