Add dummy display HAL

Change-Id: I6fa9b2f13594d8097a1d3051e8948e4daa9150bf
Signed-off-by: Youngjae Cho <y0.cho@samsung.com>

1 files changed, 65 insertions, 2 deletions

diff --git a/hw/display/display.c b/hw/display/display.c
index 8869ec9..5fd0e68 100644
--- a/hw/display/display.c
+++ b/hw/display/display.c
@@ -17,24 +17,87 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <errno.h>
 #include <hw/display.h>
 
+#define DUMMY_MAX_BRIGHTNESS 100
+
+static enum display_state dummy_state;
+static int dummy_brightness;
+
+static int dummy_display_get_max_brightness(int *val)
+{
+	if (!val)
+		return -EINVAL;
+
+	*val = DUMMY_MAX_BRIGHTNESS;
+	return 0;
+}
+
+static int dummy_display_get_brightness(int *brightness)
+{
+	if (!brightness)
+		return -EINVAL;
+
+	*brightness = dummy_brightness;
+	return 0;
+}
+
+static int dummy_display_set_brightness(int brightness)
+{
+	if (brightness < 0 || brightness > DUMMY_MAX_BRIGHTNESS)
+		return -EINVAL;
+
+	dummy_brightness = brightness;
+	return 0;
+}
+
+static int dummy_display_get_state(enum display_state *state)
+{
+	*state = dummy_state;
+	return 0;
+}
+
+static int dummy_display_set_state(enum display_state state)
+{
+	dummy_state = state;
+	return 0;
+}
+
 static int display_open(struct hw_info *info,
 		const char *id, struct hw_common **common)
 {
+	struct display_device *display_dev;
+
 	if (!info || !common)
 		return -EINVAL;
 
-	*common = NULL;
+	display_dev = calloc(1, sizeof(struct display_device));
+	if (!display_dev)
+		return -ENOMEM;
+
+	dummy_state = DISPLAY_ON;
+	dummy_brightness = 100;
+
+	display_dev->common.info = info;
+	display_dev->get_max_brightness = dummy_display_get_max_brightness;
+	display_dev->get_brightness = dummy_display_get_brightness;
+	display_dev->set_brightness = dummy_display_set_brightness;
+
+	display_dev->get_state = dummy_display_get_state;
+	display_dev->set_state = dummy_display_set_state;
+
+	*common = (struct hw_common *)display_dev;
 	return 0;
 }
 
 static int display_close(struct hw_common *common)
 {
-	if (common) /* we use NULL display_dev */
+	if (!common)
 		return -EINVAL;
 
+	free(common);
 	return 0;
 }