drm/sun4i: hdmi: Replace drm_detect_hdmi_monitor() with is_hdmi

Once EDID is parsed, the monitor HDMI support information is available
through drm_display_info.is_hdmi.

This driver calls drm_detect_hdmi_monitor() to receive the same
information and stores its own cached value, which is less efficient.

Avoid calling drm_detect_hdmi_monitor() and use drm_display_info.is_hdmi
instead and also remove sun4i_hdmi.hdmi_monitor as it is no longer
necessary.
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220421170725.903361-6-jose.exposito89@gmail.com

drivers/gpu/drm/sun4i/sun4i_hdmi.h

@@ -285,7 +285,6 @@ struct sun4i_hdmi {
 
 	struct sun4i_drv	*drv;
 
-	bool			hdmi_monitor;
 	struct cec_adapter	*cec_adap;
 
 	const struct sun4i_hdmi_variant	*variant;

drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c

@@ -99,6 +99,7 @@ static void sun4i_hdmi_enable(struct drm_encoder *encoder)
 {
 	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
+	struct drm_display_info *display = &hdmi->connector.display_info;
 	u32 val = 0;
 
 	DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");
@@ -111,7 +112,7 @@ static void sun4i_hdmi_enable(struct drm_encoder *encoder)
 	writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));
 
 	val = SUN4I_HDMI_VID_CTRL_ENABLE;
-	if (hdmi->hdmi_monitor)
+	if (display->is_hdmi)
 		val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
 
 	writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
@@ -215,9 +216,8 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector)
 	if (!edid)
 		return 0;
 
-	hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
 	DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
-			 hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
+			 connector->display_info.is_hdmi ? "an HDMI" : "a DVI");
 
 	drm_connector_update_edid_property(connector, edid);
 	cec_s_phys_addr_from_edid(hdmi->cec_adap, edid);