Re: [PATCH v1 2/2] drm: bridge: add support for lontium LT9611UXC bridge

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On 28/08/2020 17:18, Vinod Koul wrote:
On 28-08-20, 15:04, Dmitry Baryshkov wrote:
+static int lt9611uxc_bridge_attach(struct drm_bridge *bridge,
+				enum drm_bridge_attach_flags flags)
+{
+	struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+	int ret;
+
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+		dev_err(lt9611uxc->dev, "Fix bridge driver to make connector optional!");

Can we support both modes as I have done in lt9611, that way once the
conversion is done we can drop the init part and support conversion.

I have patch for msm driver to set DRM_BRIDGE_ATTACH_NO_CONNECTOR, you
can use that to test

Probably the message text is misleading. The driver as is does not work w/o DRM_BRIDGE_ATTACH_NO_CONNECTOR. Do you plan to push that patch into upstream tree?

+static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data,
+				 struct hdmi_codec_daifmt *fmt,
+				 struct hdmi_codec_params *hparms)
+{
+	/*
+	 * LT9611UXC will automatically detect rate and sample size, so no need
+	 * to setup anything here.
+	 */
+	return 0;
+}

Do we need dummy function?

Yes, this callback is mandatory (and audio_shutdown).


--
With best wishes
Dmitry
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