drm/exynos/mic: use mode info stored in CRTC to detect i80 mode

MIC driver should use info from CRTC to check mode of work instead of
illegally peeking into nodes of other devices.

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

drivers/gpu/drm/exynos/exynos_drm_mic.c

@@ -21,9 +21,12 @@
 #include <linux/component.h>
 #include <linux/pm_runtime.h>
 #include <drm/drmP.h>
+#include <drm/drm_encoder.h>
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
 
+#include "exynos_drm_drv.h"
+
 /* Sysreg registers for MIC */
 #define DSD_CFG_MUX	0x1004
 #define MIC0_RGB_MUX	(1 << 0)
@@ -85,12 +88,6 @@
 
 #define MIC_BS_SIZE_2D(x)	((x) & 0x3fff)
 
-enum {
-	ENDPOINT_DECON_NODE,
-	ENDPOINT_DSI_NODE,
-	NUM_ENDPOINTS
-};
-
 static char *clk_names[] = { "pclk_mic0", "sclk_rgb_vclk_to_mic0" };
 #define NUM_CLKS		ARRAY_SIZE(clk_names)
 static DEFINE_MUTEX(mic_mutex);
@@ -229,36 +226,6 @@ static void mic_set_reg_on(struct exynos_mic *mic, bool enable)
 	writel(reg, mic->reg + MIC_OP);
 }
 
-static int parse_dt(struct exynos_mic *mic)
-{
-	int ret = 0, i, j;
-	struct device_node *remote_node;
-	struct device_node *nodes[3];
-
-	/*
-	 * The order of endpoints does matter.
-	 * The first node must be for decon and the second one must be for dsi.
-	 */
-	for (i = 0, j = 0; i < NUM_ENDPOINTS; i++) {
-		remote_node = of_graph_get_remote_node(mic->dev->of_node, i, 0);
-		if (!remote_node) {
-			ret = -EPIPE;
-			goto exit;
-		}
-		nodes[j++] = remote_node;
-
-		if (i == ENDPOINT_DECON_NODE &&
-			of_get_child_by_name(remote_node, "i80-if-timings"))
-			mic->i80_mode = 1;
-	}
-
-exit:
-	while (--j > -1)
-		of_node_put(nodes[j]);
-
-	return ret;
-}
-
 static void mic_disable(struct drm_bridge *bridge) { }
 
 static void mic_post_disable(struct drm_bridge *bridge)
@@ -286,6 +253,7 @@ static void mic_mode_set(struct drm_bridge *bridge,
 
 	mutex_lock(&mic_mutex);
 	drm_display_mode_to_videomode(mode, &mic->vm);
+	mic->i80_mode = to_exynos_crtc(bridge->encoder->crtc)->i80_mode;
 	mutex_unlock(&mic_mutex);
 }
 
@@ -417,10 +385,6 @@ static int exynos_mic_probe(struct platform_device *pdev)
 
 	mic->dev = dev;
 
-	ret = parse_dt(mic);
-	if (ret)
-		goto err;
-
 	ret = of_address_to_resource(dev->of_node, 0, &res);
 	if (ret) {
 		DRM_ERROR("mic: Failed to get mem region for MIC\n");