drm/vc4: hdmi: rework connectors and encoders

the vc4_hdmi driver has some custom structures to hold the data it needs to
associate with the drm_encoder and drm_connector structures.

However, it allocates them separately from the vc4_hdmi structure which
makes it more complicated than it needs to be.

Move those structures to be contained by vc4_hdmi and update the code
accordingly.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/93b418d63c876355af2b3d3afebe31a256268623.1599120059.git-series.maxime@cerno.tech

drivers/gpu/drm/vc4/vc4_hdmi.c

@@ -191,20 +191,15 @@ static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs =
 	.get_modes = vc4_hdmi_connector_get_modes,
 };
 
-static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
-						     struct drm_encoder *encoder,
+static int vc4_hdmi_connector_init(struct drm_device *dev,
+				   struct vc4_hdmi *vc4_hdmi,
 				   struct i2c_adapter *ddc)
 {
-	struct drm_connector *connector;
-	struct vc4_hdmi_connector *hdmi_connector;
+	struct vc4_hdmi_connector *hdmi_connector = &vc4_hdmi->connector;
+	struct drm_connector *connector = &hdmi_connector->base;
+	struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
 	int ret;
 
-	hdmi_connector = devm_kzalloc(dev->dev, sizeof(*hdmi_connector),
-				      GFP_KERNEL);
-	if (!hdmi_connector)
-		return ERR_PTR(-ENOMEM);
-	connector = &hdmi_connector->base;
-
 	hdmi_connector->encoder = encoder;
 
 	drm_connector_init_with_ddc(dev, connector,
@@ -216,7 +211,7 @@ static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
 	/* Create and attach TV margin props to this connector. */
 	ret = drm_mode_create_tv_margin_properties(dev);
 	if (ret)
-		return ERR_PTR(ret);
+		return ret;
 
 	drm_connector_attach_tv_margin_properties(connector);
 
@@ -228,7 +223,7 @@ static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
 
 	drm_connector_attach_encoder(connector, encoder);
 
-	return connector;
+	return 0;
 }
 
 static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
@@ -298,21 +293,22 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 	struct vc4_dev *vc4 = encoder->dev->dev_private;
 	struct vc4_hdmi *hdmi = vc4->hdmi;
-	struct drm_connector_state *cstate = hdmi->connector->state;
+	struct drm_connector *connector = &hdmi->connector.base;
+	struct drm_connector_state *cstate = connector->state;
 	struct drm_crtc *crtc = encoder->crtc;
 	const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 	union hdmi_infoframe frame;
 	int ret;
 
 	ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
-						       hdmi->connector, mode);
+						       connector, mode);
 	if (ret < 0) {
 		DRM_ERROR("couldn't fill AVI infoframe\n");
 		return;
 	}
 
 	drm_hdmi_avi_infoframe_quant_range(&frame.avi,
-					   hdmi->connector, mode,
+					   connector, mode,
 					   vc4_encoder->limited_rgb_range ?
 					   HDMI_QUANTIZATION_RANGE_LIMITED :
 					   HDMI_QUANTIZATION_RANGE_FULL);
@@ -628,7 +624,8 @@ static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
 /* HDMI audio codec callbacks */
 static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *hdmi)
 {
-	struct drm_device *drm = hdmi->encoder->dev;
+	struct drm_encoder *encoder = &hdmi->encoder.base.base;
+	struct drm_device *drm = encoder->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(drm);
 	u32 hsm_clock = clk_get_rate(hdmi->hsm_clock);
 	unsigned long n, m;
@@ -647,7 +644,7 @@ static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *hdmi)
 
 static void vc4_hdmi_set_n_cts(struct vc4_hdmi *hdmi)
 {
-	struct drm_encoder *encoder = hdmi->encoder;
+	struct drm_encoder *encoder = &hdmi->encoder.base.base;
 	struct drm_crtc *crtc = encoder->crtc;
 	struct drm_device *drm = encoder->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(drm);
@@ -685,7 +682,8 @@ static int vc4_hdmi_audio_startup(struct snd_pcm_substream *substream,
 				  struct snd_soc_dai *dai)
 {
 	struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
-	struct drm_encoder *encoder = hdmi->encoder;
+	struct drm_encoder *encoder = &hdmi->encoder.base.base;
+	struct drm_connector *connector = &hdmi->connector.base;
 	struct vc4_dev *vc4 = to_vc4_dev(encoder->dev);
 	int ret;
 
@@ -702,8 +700,7 @@ static int vc4_hdmi_audio_startup(struct snd_pcm_substream *substream,
 				VC4_HDMI_RAM_PACKET_ENABLE))
 		return -ENODEV;
 
-	ret = snd_pcm_hw_constraint_eld(substream->runtime,
-					hdmi->connector->eld);
+	ret = snd_pcm_hw_constraint_eld(substream->runtime, connector->eld);
 	if (ret)
 		return ret;
 
@@ -717,7 +714,7 @@ static int vc4_hdmi_audio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 
 static void vc4_hdmi_audio_reset(struct vc4_hdmi *hdmi)
 {
-	struct drm_encoder *encoder = hdmi->encoder;
+	struct drm_encoder *encoder = &hdmi->encoder.base.base;
 	struct drm_device *drm = encoder->dev;
 	struct device *dev = &hdmi->pdev->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(drm);
@@ -751,7 +748,7 @@ static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
 				    struct snd_soc_dai *dai)
 {
 	struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
-	struct drm_encoder *encoder = hdmi->encoder;
+	struct drm_encoder *encoder = &hdmi->encoder.base.base;
 	struct drm_device *drm = encoder->dev;
 	struct device *dev = &hdmi->pdev->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(drm);
@@ -824,7 +821,7 @@ static int vc4_hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd,
 				  struct snd_soc_dai *dai)
 {
 	struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
-	struct drm_encoder *encoder = hdmi->encoder;
+	struct drm_encoder *encoder = &hdmi->encoder.base.base;
 	struct drm_device *drm = encoder->dev;
 	struct vc4_dev *vc4 = to_vc4_dev(drm);
 
@@ -868,9 +865,10 @@ static int vc4_hdmi_audio_eld_ctl_info(struct snd_kcontrol *kcontrol,
 {
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct vc4_hdmi *hdmi = snd_component_to_hdmi(component);
+	struct drm_connector *connector = &hdmi->connector.base;
 
 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
-	uinfo->count = sizeof(hdmi->connector->eld);
+	uinfo->count = sizeof(connector->eld);
 
 	return 0;
 }
@@ -880,9 +878,10 @@ static int vc4_hdmi_audio_eld_ctl_get(struct snd_kcontrol *kcontrol,
 {
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct vc4_hdmi *hdmi = snd_component_to_hdmi(component);
+	struct drm_connector *connector = &hdmi->connector.base;
 
-	memcpy(ucontrol->value.bytes.data, hdmi->connector->eld,
-	       sizeof(hdmi->connector->eld));
+	memcpy(ucontrol->value.bytes.data, connector->eld,
+	       sizeof(connector->eld));
 
 	return 0;
 }
@@ -1220,7 +1219,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 	struct drm_device *drm = dev_get_drvdata(master);
 	struct vc4_dev *vc4 = drm->dev_private;
 	struct vc4_hdmi *hdmi;
-	struct vc4_hdmi_encoder *vc4_hdmi_encoder;
+	struct drm_encoder *encoder;
 	struct device_node *ddc_node;
 	u32 value;
 	int ret;
@@ -1229,14 +1228,10 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 	if (!hdmi)
 		return -ENOMEM;
 
-	vc4_hdmi_encoder = devm_kzalloc(dev, sizeof(*vc4_hdmi_encoder),
-					GFP_KERNEL);
-	if (!vc4_hdmi_encoder)
-		return -ENOMEM;
-	vc4_hdmi_encoder->base.type = VC4_ENCODER_TYPE_HDMI0;
-	hdmi->encoder = &vc4_hdmi_encoder->base.base;
-
+	encoder = &hdmi->encoder.base.base;
+	hdmi->encoder.base.type = VC4_ENCODER_TYPE_HDMI0;
 	hdmi->pdev = pdev;
+
 	hdmi->hdmicore_regs = vc4_ioremap_regs(pdev, 0);
 	if (IS_ERR(hdmi->hdmicore_regs))
 		return PTR_ERR(hdmi->hdmicore_regs);
@@ -1324,15 +1319,13 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 	}
 	pm_runtime_enable(dev);
 
-	drm_simple_encoder_init(drm, hdmi->encoder, DRM_MODE_ENCODER_TMDS);
-	drm_encoder_helper_add(hdmi->encoder, &vc4_hdmi_encoder_helper_funcs);
+	drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);
+	drm_encoder_helper_add(encoder, &vc4_hdmi_encoder_helper_funcs);
 
-	hdmi->connector =
-		vc4_hdmi_connector_init(drm, hdmi->encoder, hdmi->ddc);
-	if (IS_ERR(hdmi->connector)) {
-		ret = PTR_ERR(hdmi->connector);
+	ret = vc4_hdmi_connector_init(drm, hdmi, hdmi->ddc);
+	if (ret)
 		goto err_destroy_encoder;
-	}
+
 #ifdef CONFIG_DRM_VC4_HDMI_CEC
 	hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
 					      vc4, "vc4",
@@ -1342,7 +1335,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 	if (ret < 0)
 		goto err_destroy_conn;
 
-	cec_fill_conn_info_from_drm(&conn_info, hdmi->connector);
+	cec_fill_conn_info_from_drm(&conn_info, &hdmi->connector.base);
 	cec_s_conn_info(hdmi->cec_adap, &conn_info);
 
 	HDMI_WRITE(VC4_HDMI_CPU_MASK_SET, 0xffffffff);
@@ -1379,10 +1372,10 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 err_delete_cec_adap:
 	cec_delete_adapter(hdmi->cec_adap);
 err_destroy_conn:
-	vc4_hdmi_connector_destroy(hdmi->connector);
+	vc4_hdmi_connector_destroy(&hdmi->connector.base);
 #endif
 err_destroy_encoder:
-	drm_encoder_cleanup(hdmi->encoder);
+	drm_encoder_cleanup(encoder);
 err_unprepare_hsm:
 	clk_disable_unprepare(hdmi->hsm_clock);
 	pm_runtime_disable(dev);
@@ -1400,8 +1393,8 @@ static void vc4_hdmi_unbind(struct device *dev, struct device *master,
 	struct vc4_hdmi *hdmi = vc4->hdmi;
 
 	cec_unregister_adapter(hdmi->cec_adap);
-	vc4_hdmi_connector_destroy(hdmi->connector);
-	drm_encoder_cleanup(hdmi->encoder);
+	vc4_hdmi_connector_destroy(&hdmi->connector.base);
+	drm_encoder_cleanup(&hdmi->encoder.base.base);
 
 	clk_disable_unprepare(hdmi->hsm_clock);
 	pm_runtime_disable(dev);

drivers/gpu/drm/vc4/vc4_hdmi.h

@@ -8,6 +8,36 @@
 
 #include "vc4_drv.h"
 
+/* VC4 HDMI encoder KMS struct */
+struct vc4_hdmi_encoder {
+	struct vc4_encoder base;
+	bool hdmi_monitor;
+	bool limited_rgb_range;
+};
+
+static inline struct vc4_hdmi_encoder *
+to_vc4_hdmi_encoder(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct vc4_hdmi_encoder, base.base);
+}
+
+/* VC4 HDMI connector KMS struct */
+struct vc4_hdmi_connector {
+	struct drm_connector base;
+
+	/* Since the connector is attached to just the one encoder,
+	 * this is the reference to it so we can do the best_encoder()
+	 * hook.
+	 */
+	struct drm_encoder *encoder;
+};
+
+static inline struct vc4_hdmi_connector *
+to_vc4_hdmi_connector(struct drm_connector *connector)
+{
+	return container_of(connector, struct vc4_hdmi_connector, base);
+}
+
 /* HDMI audio information */
 struct vc4_hdmi_audio {
 	struct snd_soc_card card;
@@ -25,8 +55,8 @@ struct vc4_hdmi_audio {
 struct vc4_hdmi {
 	struct platform_device *pdev;
 
-	struct drm_encoder *encoder;
-	struct drm_connector *connector;
+	struct vc4_hdmi_encoder encoder;
+	struct vc4_hdmi_connector connector;
 
 	struct vc4_hdmi_audio audio;
 
@@ -53,34 +83,4 @@ struct vc4_hdmi {
 #define HD_READ(offset) readl(vc4->hdmi->hd_regs + offset)
 #define HD_WRITE(offset, val) writel(val, vc4->hdmi->hd_regs + offset)
 
-/* VC4 HDMI encoder KMS struct */
-struct vc4_hdmi_encoder {
-	struct vc4_encoder base;
-	bool hdmi_monitor;
-	bool limited_rgb_range;
-};
-
-static inline struct vc4_hdmi_encoder *
-to_vc4_hdmi_encoder(struct drm_encoder *encoder)
-{
-	return container_of(encoder, struct vc4_hdmi_encoder, base.base);
-}
-
-/* VC4 HDMI connector KMS struct */
-struct vc4_hdmi_connector {
-	struct drm_connector base;
-
-	/* Since the connector is attached to just the one encoder,
-	 * this is the reference to it so we can do the best_encoder()
-	 * hook.
-	 */
-	struct drm_encoder *encoder;
-};
-
-static inline struct vc4_hdmi_connector *
-to_vc4_hdmi_connector(struct drm_connector *connector)
-{
-	return container_of(connector, struct vc4_hdmi_connector, base);
-}
-
 #endif /* _VC4_HDMI_H_ */