api: export LCD device to external apps

This patch exports LCD info-query and bitmap-rendering functions to
external apps.

This patch is tested on a Seaboard.  Because the LCD driver is not yet
upstreamed, the test was done in a local downstream repo.

Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>

3 files changed, 67 insertions, 0 deletions

diff --git a/examples/api/demo.c b/examples/api/demo.c
index 65e7491..19d38f6 100644
--- a/examples/api/demo.c
+++ b/examples/api/demo.c
@@ -48,6 +48,7 @@ int main(int argc, char * const argv[])
 	ulong start, now;
 	struct device_info *di;
 	lbasize_t rlen;
+	struct display_info disinfo;
 
 	if (!api_search_sig(&sig))
 		return -1;
@@ -176,6 +177,36 @@ int main(int argc, char * const argv[])
 	while ((env = ub_env_enum(env)) != NULL)
 		printf("%s = %s\n", env, ub_env_get(env));
 
+	printf("\n*** Display ***\n");
+
+	if (ub_display_get_info(DISPLAY_TYPE_LCD, &disinfo)) {
+		printf("LCD info: failed\n");
+	} else {
+		printf("LCD info:\n");
+		printf("  pixel width:  %d\n", disinfo.pixel_width);
+		printf("  pixel height: %d\n", disinfo.pixel_height);
+		printf("  screen rows:  %d\n", disinfo.screen_rows);
+		printf("  screen cols:  %d\n", disinfo.screen_cols);
+	}
+	if (ub_display_get_info(DISPLAY_TYPE_VIDEO, &disinfo)) {
+		printf("video info: failed\n");
+	} else {
+		printf("video info:\n");
+		printf("  pixel width:  %d\n", disinfo.pixel_width);
+		printf("  pixel height: %d\n", disinfo.pixel_height);
+		printf("  screen rows:  %d\n", disinfo.screen_rows);
+		printf("  screen cols:  %d\n", disinfo.screen_cols);
+	}
+
+	printf("*** Press any key to continue ***\n");
+	printf("got char 0x%x\n", ub_getc());
+
+	/*
+	 * This only clears messages on screen, not on serial port. It is
+	 * equivalent to a no-op if no display is available.
+	 */
+	ub_display_clear();
+
 	/* reset */
 	printf("\n*** Resetting board ***\n");
 	ub_reset();
diff --git a/examples/api/glue.c b/examples/api/glue.c
index eff6a7e..d907e3f 100644
--- a/examples/api/glue.c
+++ b/examples/api/glue.c
@@ -402,3 +402,34 @@ const char * ub_env_enum(const char *last)
 
 	return env_name;
 }
+
+/****************************************
+ *
+ * display
+ *
+ ****************************************/
+
+int ub_display_get_info(int type, struct display_info *di)
+{
+	int err = 0;
+
+	if (!syscall(API_DISPLAY_GET_INFO, &err, (uint32_t)type, (uint32_t)di))
+		return API_ESYSC;
+
+	return err;
+}
+
+int ub_display_draw_bitmap(ulong bitmap, int x, int y)
+{
+	int err = 0;
+
+	if (!syscall(API_DISPLAY_DRAW_BITMAP, &err, bitmap, x, y))
+		return API_ESYSC;
+
+	return err;
+}
+
+void ub_display_clear(void)
+{
+	syscall(API_DISPLAY_CLEAR, NULL);
+}
diff --git a/examples/api/glue.h b/examples/api/glue.h
index 6bf47d0..e43f7d9 100644
--- a/examples/api/glue.h
+++ b/examples/api/glue.h
@@ -77,4 +77,9 @@ int			ub_dev_send(int handle, void *buf, int len);
 int			ub_dev_recv(int handle, void *buf, int len, int *rlen);
 struct device_info *	ub_dev_get(int);
 
+/* display */
+int ub_display_get_info(int type, struct display_info *di);
+int ub_display_draw_bitmap(ulong bitmap, int x, int y);
+void ub_display_clear(void);
+
 #endif /* _API_GLUE_H_ */