[PATCH v2 13/27] drm/rockchip: Set mode_changed on vrr_enabled change

[Nicolas Frattaroli <nicolas.frattaroli@collabora.com>]

RK3588 (and likely other Rockchip hardware) requires a full modeset when
VRR is enabled in order for it to function properly.

Set mode_changed during the atomic check phase to do this.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index 45588b79b3d4..e3aad75b88b4 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -13,6 +13,7 @@
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_print.h>
 
 #include "rockchip_drm_drv.h"
 #include "rockchip_drm_fb.h"
@@ -59,9 +60,26 @@ rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
 	return &afbc_fb->base;
 }
 
+static int rockchip_drm_atomic_check(struct drm_device *dev, struct drm_atomic_commit *state)
+{
+	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
+	struct drm_crtc *crtc;
+	int i;
+
+	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
+		if (old_crtc_state->vrr_enabled != new_crtc_state->vrr_enabled) {
+			new_crtc_state->mode_changed = true;
+			drm_dbg_driver(dev, "[CRTC:%d:%s] VRR changed\n",
+				       crtc->base.id, crtc->name);
+		}
+	}
+
+	return drm_atomic_helper_check(dev, state);
+}
+
 static const struct drm_mode_config_funcs rockchip_drm_mode_config_funcs = {
 	.fb_create = rockchip_fb_create,
-	.atomic_check = drm_atomic_helper_check,
+	.atomic_check = rockchip_drm_atomic_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };
 

-- 
2.56.0