[PATCH 11/14] drm: exynos: hdmi: add support for exynos5 mixer

[Rahul Sharma]

This patch adds support for exynos5 mixer with device tree enabled.

Signed-off-by: Rahul Sharma <rahul.sharma at samsung.com>
Signed-off-by: Fahad Kunnathadi <fahad.k at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_mixer.c |   41 ++++++++++++++++++++++++++++++--
 drivers/gpu/drm/exynos/regs-mixer.h   |    2 +
 2 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index ff2a45d..d34562a 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -645,6 +645,10 @@ static void mixer_win_reset(struct mixer_context *ctx)
 	if (ctx->vp_enabled)
 		mixer_reg_writemask(res, MXR_CFG, 0, MXR_CFG_VP_ENABLE);
 
+	/* enable vsync interrupt after mixer reset*/
+	mixer_reg_writemask(res, MXR_INT_EN, MXR_INT_EN_VSYNC,
+			MXR_INT_EN_VSYNC);
+
 	mixer_vsync_set_update(ctx, true);
 	spin_unlock_irqrestore(&res->reg_slock, flags);
 }
@@ -913,6 +917,11 @@ static irqreturn_t mixer_irq_handler(int irq, void *arg)
 
 	/* handling VSYNC */
 	if (val & MXR_INT_STATUS_VSYNC) {
+		if (ctx->mxr_ver == MXR_VER_16_0_33_0) {
+			/* layer update mandatory for mixer 16.0.33.0 */
+			mixer_reg_writemask(res, MXR_CFG, ~0,
+			MXR_CFG_LAYER_UPDATE);
+		}
 		/* interlace scan need to check shadow register */
 		if (ctx->interlace) {
 			base = mixer_reg_read(res, MXR_GRAPHIC_BASE(0));
@@ -1066,6 +1075,11 @@ fail:
 	return ret;
 }
 
+static struct mixer_drv_data exynos5_mxr_drv_data = {
+	.version = MXR_VER_16_0_33_0,
+	.is_vp_enabled = 0,
+};
+
 static struct mixer_drv_data exynos4_mxr_drv_data = {
 	.version = MXR_VER_0_0_0_16,
 	.is_vp_enabled = 1,
@@ -1075,6 +1089,18 @@ static struct platform_device_id mixer_driver_types[] = {
 		.name		= "s5p-mixer",
 		.driver_data	= (unsigned long)&exynos4_mxr_drv_data,
 	}, {
+		.name		= "exynos5-mixer",
+		.driver_data	= (unsigned long)&exynos5_mxr_drv_data,
+	}, {
+		/* end node */
+	}
+};
+
+static struct of_device_id mixer_match_types[] = {
+	{
+		.compatible = "samsung,exynos5-mixer",
+		.data	= &exynos5_mxr_drv_data,
+	}, {
 		/* end node */
 	}
 };
@@ -1104,8 +1130,16 @@ static int __devinit mixer_probe(struct platform_device *pdev)
 
 	mutex_init(&ctx->mixer_mutex);
 
-	drv = (struct mixer_drv_data *)platform_get_device_id(
-			pdev)->driver_data;
+	if (dev->of_node) {
+		const struct of_device_id *match;
+		match = of_match_node(of_match_ptr(mixer_match_types),
+							  pdev->dev.of_node);
+		drv = match->data;
+	} else {
+		drv = (struct mixer_drv_data *)
+			platform_get_device_id(pdev)->driver_data;
+	}
+
 	ctx->dev = &pdev->dev;
 	drm_hdmi_ctx->ctx = (void *)ctx;
 	ctx->vp_enabled = drv->is_vp_enabled;
@@ -1167,9 +1201,10 @@ static SIMPLE_DEV_PM_OPS(mixer_pm_ops, mixer_suspend, NULL);
 
 struct platform_driver mixer_driver = {
 	.driver = {
-		.name = "s5p-mixer",
+		.name = "exynos-mixer",
 		.owner = THIS_MODULE,
 		.pm = &mixer_pm_ops,
+		.of_match_table = mixer_match_types,
 	},
 	.probe = mixer_probe,
 	.remove = __devexit_p(mixer_remove),
diff --git a/drivers/gpu/drm/exynos/regs-mixer.h b/drivers/gpu/drm/exynos/regs-mixer.h
index fd2f4d1..6ee60be 100644
--- a/drivers/gpu/drm/exynos/regs-mixer.h
+++ b/drivers/gpu/drm/exynos/regs-mixer.h
@@ -69,6 +69,7 @@
 	(((val) << (low_bit)) & MXR_MASK(high_bit, low_bit))
 
 /* bits for MXR_STATUS */
+#define MXR_STATUS_SOFT_RESET		(1 << 8)
 #define MXR_STATUS_16_BURST		(1 << 7)
 #define MXR_STATUS_BURST_MASK		(1 << 7)
 #define MXR_STATUS_BIG_ENDIAN		(1 << 3)
@@ -77,6 +78,7 @@
 #define MXR_STATUS_REG_RUN		(1 << 0)
 
 /* bits for MXR_CFG */
+#define MXR_CFG_LAYER_UPDATE		(1 << 31)
 #define MXR_CFG_RGB601_0_255		(0 << 9)
 #define MXR_CFG_RGB601_16_235		(1 << 9)
 #define MXR_CFG_RGB709_0_255		(2 << 9)
-- 
1.7.0.4