[PATCH 04/10] drm/rockchip/crc: Implement verify_crc_source callback

[Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>]

This patch implements "verify_crc_source" callback function for
rockchip drm driver.

Signed-off-by: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index c9222119767d..ea4884ac4cb0 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1138,12 +1138,32 @@ static int vop_crtc_set_crc_source(struct drm_crtc *crtc,
 
 	return ret;
 }
+
+static int
+vop_crtc_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
+			   size_t *values_cnt)
+{
+	if ((source_name && strcmp(source_name, "auto") == 0) || !source_name) {
+		*values_cnt = 3;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
 #else
 static int vop_crtc_set_crc_source(struct drm_crtc *crtc,
 				   const char *source_name, size_t *values_cnt)
 {
 	return -ENODEV;
 }
+
+static int
+vop_crtc_verify_crc_source(struct drm_crtc *crtc, const char *source_name,
+			   size_t *values_cnt)
+{
+	return -ENODEV;
+}
 #endif
 
 static const struct drm_crtc_funcs vop_crtc_funcs = {
@@ -1156,6 +1176,7 @@ static const struct drm_crtc_funcs vop_crtc_funcs = {
 	.enable_vblank = vop_crtc_enable_vblank,
 	.disable_vblank = vop_crtc_disable_vblank,
 	.set_crc_source = vop_crtc_set_crc_source,
+	.verify_crc_source = vop_crtc_verify_crc_source,
 };
 
 static void vop_fb_unref_worker(struct drm_flip_work *work, void *val)
-- 
2.16.2

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