device-display: Add get backend logic

When the hal device display module api is called before loading hal-backend,
it should be handled with hal_device_display_get_backend().
This was removed as applying HAL ABI versioning,
however this logic is necessary.

Change-Id: I3ed1b67e3ea8fada9ae394d717e66f5c3f6d216f
Signed-off-by: Yunhee Seo <yuni.seo@samsung.com>

1 files changed, 148 insertions, 0 deletions

diff --git a/src/hal-api-device-display.c b/src/hal-api-device-display.c
index 1025872..f07d9b0 100644
--- a/src/hal-api-device-display.c
+++ b/src/hal-api-device-display.c
@@ -58,14 +58,22 @@ int hal_device_display_put_backend(void)
 
 	free(hal_device_display_funcs);
 	hal_device_display_funcs = NULL;
+
 	return 0;
 }
 
 int hal_device_display_get_max_brightness(int *brightness)
 {
+	int ret = 0;
+
 	if (!brightness)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_max_brightness)
 		return -ENOTSUP;
@@ -75,9 +83,16 @@ int hal_device_display_get_max_brightness(int *brightness)
 
 int hal_device_display_get_brightness(int *brightness)
 {
+	int ret = 0;
+
 	if (!brightness)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_brightness)
 		return -ENOTSUP;
@@ -87,6 +102,13 @@ int hal_device_display_get_brightness(int *brightness)
 
 int hal_device_display_set_brightness(int brightness)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_brightness)
 		return -ENOTSUP;
@@ -96,6 +118,13 @@ int hal_device_display_set_brightness(int brightness)
 
 int hal_device_display_set_multi_brightness(int brightness, int step, int delay)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_multi_brightness)
 		return -ENOTSUP;
@@ -105,9 +134,16 @@ int hal_device_display_set_multi_brightness(int brightness, int step, int delay)
 
 int hal_device_display_get_auto_brightness(float lmax, float lmin, float light, int *brightness)
 {
+	int ret = 0;
+
 	if (!brightness)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_auto_brightness)
 		return -ENOTSUP;
@@ -117,9 +153,16 @@ int hal_device_display_get_auto_brightness(float lmax, float lmin, float light,
 
 int hal_device_display_get_state(hal_device_display_state_e *state)
 {
+	int ret = 0;
+
 	if (!state)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_state)
 		return -ENOTSUP;
@@ -129,6 +172,13 @@ int hal_device_display_get_state(hal_device_display_state_e *state)
 
 int hal_device_display_set_state(hal_device_display_state_e state)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_state)
 		return -ENOTSUP;
@@ -138,9 +188,16 @@ int hal_device_display_set_state(hal_device_display_state_e state)
 
 int hal_device_display_get_image_effect(hal_device_display_image_effect_e *effect)
 {
+	int ret = 0;
+
 	if (!effect)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_image_effect)
 		return -ENOTSUP;
@@ -150,6 +207,13 @@ int hal_device_display_get_image_effect(hal_device_display_image_effect_e *effec
 
 int hal_device_display_set_image_effect(hal_device_display_image_effect_e effect)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_image_effect)
 		return -ENOTSUP;
@@ -159,9 +223,16 @@ int hal_device_display_set_image_effect(hal_device_display_image_effect_e effect
 
 int hal_device_display_get_panel_mode(hal_device_display_panel_mode_e *mode)
 {
+	int ret = 0;
+
 	if (!mode)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_panel_mode)
 		return -ENOTSUP;
@@ -171,6 +242,13 @@ int hal_device_display_get_panel_mode(hal_device_display_panel_mode_e *mode)
 
 int hal_device_display_set_panel_mode(hal_device_display_panel_mode_e mode)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_panel_mode)
 		return -ENOTSUP;
@@ -180,9 +258,16 @@ int hal_device_display_set_panel_mode(hal_device_display_panel_mode_e mode)
 
 int hal_device_display_get_aod_mode(hal_device_display_aod_mode_e *mode)
 {
+	int ret = 0;
+
 	if (!mode)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_aod_mode)
 		return -ENOTSUP;
@@ -192,6 +277,13 @@ int hal_device_display_get_aod_mode(hal_device_display_aod_mode_e *mode)
 
 int hal_device_display_get_aod_brightness(int *max, int *normal, int *min, int *charging)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_aod_brightness)
 		return -ENOTSUP;
@@ -201,9 +293,16 @@ int hal_device_display_get_aod_brightness(int *max, int *normal, int *min, int *
 
 int hal_device_display_get_max_frame_rate(int *rate)
 {
+	int ret = 0;
+
 	if (!rate)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_max_frame_rate)
 		return -ENOTSUP;
@@ -213,9 +312,16 @@ int hal_device_display_get_max_frame_rate(int *rate)
 
 int hal_device_display_get_min_frame_rate(int *rate)
 {
+	int ret = 0;
+
 	if (!rate)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_min_frame_rate)
 		return -ENOTSUP;
@@ -225,9 +331,16 @@ int hal_device_display_get_min_frame_rate(int *rate)
 
 int hal_device_display_get_frame_rate(int *rate)
 {
+	int ret = 0;
+
 	if (!rate)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_frame_rate)
 		return -ENOTSUP;
@@ -237,6 +350,13 @@ int hal_device_display_get_frame_rate(int *rate)
 
 int hal_device_display_set_frame_rate(int rate)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_frame_rate)
 		return -ENOTSUP;
@@ -246,6 +366,13 @@ int hal_device_display_set_frame_rate(int rate)
 
 int hal_device_display_set_white_balance(hal_device_display_white_balance_e white_balance_type, int value)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_white_balance)
 		return -ENOTSUP;
@@ -255,9 +382,16 @@ int hal_device_display_set_white_balance(hal_device_display_white_balance_e whit
 
 int hal_device_display_get_white_balance(hal_device_display_white_balance_e white_balance_type, int* value)
 {
+	int ret = 0;
+
 	if (!value)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_white_balance)
 		return -ENOTSUP;
@@ -267,9 +401,16 @@ int hal_device_display_get_white_balance(hal_device_display_white_balance_e whit
 
 int hal_device_display_get_rotation_angle(int display_index, hal_device_display_rotation_angle_e *angle)
 {
+	int ret = 0;
+
 	if (!angle)
 		return -EINVAL;
 
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->get_rotation_angle)
 		return -ENOTSUP;
@@ -281,6 +422,13 @@ int hal_device_display_set_rotation_angle(int display_index,
 					hal_device_display_rotation_angle_e angle,
 					hal_device_display_rotation_direction_e direction)
 {
+	int ret = 0;
+
+	if (!hal_device_display_funcs) {
+		if ((ret = hal_device_display_get_backend()) < 0)
+			return ret;
+	}
+
 	if (!hal_device_display_funcs ||
 		!hal_device_display_funcs->set_rotation_angle)
 		return -ENOTSUP;