Validate each display mode against the astdp transmitter chips. Filters
out modes that the chip does not support.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/ast/ast_dp.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/ast/ast_dp.c b/drivers/gpu/drm/ast/ast_dp.c
index 056991afde7f..19c04687b0fe 100644
--- a/drivers/gpu/drm/ast/ast_dp.c
+++ b/drivers/gpu/drm/ast/ast_dp.c
@@ -300,6 +300,19 @@ static const struct drm_encoder_funcs ast_astdp_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
+static enum drm_mode_status
+ast_astdp_encoder_helper_mode_valid(struct drm_encoder *encoder,
+ const struct drm_display_mode *mode)
+{
+ int res;
+
+ res = ast_astdp_get_mode_index(mode->hdisplay, mode->vdisplay);
+ if (res < 0)
+ return MODE_NOMODE;
+
+ return MODE_OK;
+}
+
static void ast_astdp_encoder_helper_atomic_mode_set(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
@@ -389,6 +402,7 @@ static int ast_astdp_encoder_helper_atomic_check(struct drm_encoder *encoder,
}
static const struct drm_encoder_helper_funcs ast_astdp_encoder_helper_funcs = {
+ .mode_valid = ast_astdp_encoder_helper_mode_valid,
.atomic_mode_set = ast_astdp_encoder_helper_atomic_mode_set,
.atomic_enable = ast_astdp_encoder_helper_atomic_enable,
.atomic_disable = ast_astdp_encoder_helper_atomic_disable,
--
2.48.1
