drm/gma500: Make gma_i2c_chan a subclass of i2c_adapter

This makes it easier to get at the full gma_i2c_chan when having an
i2c_adapter from eg. drm_connector->ddc.
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220601092311.22648-3-patrik.r.jakobsson@gmail.com

drivers/gpu/drm/gma500/cdv_intel_crt.c

@@ -203,7 +203,7 @@ static int cdv_intel_crt_get_modes(struct drm_connector *connector)
 {
 	struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
 	return psb_intel_ddc_get_modes(connector,
-				       &gma_encoder->ddc_bus->adapter);
+				       &gma_encoder->ddc_bus->base);
 }
 
 static int cdv_intel_crt_set_property(struct drm_connector *connector,

drivers/gpu/drm/gma500/cdv_intel_hdmi.c

@@ -130,7 +130,7 @@ static enum drm_connector_status cdv_hdmi_detect(
 	struct edid *edid = NULL;
 	enum drm_connector_status status = connector_status_disconnected;
 
-	edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
+	edid = drm_get_edid(connector, &gma_encoder->i2c_bus->base);
 
 	hdmi_priv->has_hdmi_sink = false;
 	hdmi_priv->has_hdmi_audio = false;
@@ -212,7 +212,7 @@ static int cdv_hdmi_get_modes(struct drm_connector *connector)
 	struct edid *edid = NULL;
 	int ret = 0;
 
-	edid = drm_get_edid(connector, &gma_encoder->i2c_bus->adapter);
+	edid = drm_get_edid(connector, &gma_encoder->i2c_bus->base);
 	if (edid) {
 		drm_connector_update_edid_property(connector, edid);
 		ret = drm_add_edid_modes(connector, edid);
@@ -350,7 +350,7 @@ void cdv_hdmi_init(struct drm_device *dev,
 		goto failed_ddc;
 	}
 
-	hdmi_priv->hdmi_i2c_adapter = &(gma_encoder->i2c_bus->adapter);
+	hdmi_priv->hdmi_i2c_adapter = &gma_encoder->i2c_bus->base;
 	hdmi_priv->dev = dev;
 	return;
 

drivers/gpu/drm/gma500/cdv_intel_lvds.c

@@ -302,7 +302,7 @@ static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
 	int ret;
 
-	ret = psb_intel_ddc_get_modes(connector, &gma_encoder->i2c_bus->adapter);
+	ret = psb_intel_ddc_get_modes(connector, &gma_encoder->i2c_bus->base);
 
 	if (ret)
 		return ret;
@@ -583,7 +583,7 @@ void cdv_intel_lvds_init(struct drm_device *dev,
 	 */
 	mutex_lock(&dev->mode_config.mutex);
 	psb_intel_ddc_get_modes(connector,
-				&gma_encoder->ddc_bus->adapter);
+				&gma_encoder->ddc_bus->base);
 	list_for_each_entry(scan, &connector->probed_modes, head) {
 		if (scan->type & DRM_MODE_TYPE_PREFERRED) {
 			mode_dev->panel_fixed_mode =

drivers/gpu/drm/gma500/intel_i2c.c

@@ -113,10 +113,10 @@ struct gma_i2c_chan *gma_i2c_create(struct drm_device *dev, const u32 reg,
 
 	chan->drm_dev = dev;
 	chan->reg = reg;
-	snprintf(chan->adapter.name, I2C_NAME_SIZE, "intel drm %s", name);
-	chan->adapter.owner = THIS_MODULE;
-	chan->adapter.algo_data = &chan->algo;
-	chan->adapter.dev.parent = dev->dev;
+	snprintf(chan->base.name, I2C_NAME_SIZE, "intel drm %s", name);
+	chan->base.owner = THIS_MODULE;
+	chan->base.algo_data = &chan->algo;
+	chan->base.dev.parent = dev->dev;
 	chan->algo.setsda = set_data;
 	chan->algo.setscl = set_clock;
 	chan->algo.getsda = get_data;
@@ -125,9 +125,9 @@ struct gma_i2c_chan *gma_i2c_create(struct drm_device *dev, const u32 reg,
 	chan->algo.timeout = usecs_to_jiffies(2200);
 	chan->algo.data = chan;
 
-	i2c_set_adapdata(&chan->adapter, chan);
+	i2c_set_adapdata(&chan->base, chan);
 
-	if (i2c_bit_add_bus(&chan->adapter))
+	if (i2c_bit_add_bus(&chan->base))
 		goto out_free;
 
 	/* JJJ:  raise SCL and SDA? */
@@ -153,6 +153,6 @@ void gma_i2c_destroy(struct gma_i2c_chan *chan)
 	if (!chan)
 		return;
 
-	i2c_del_adapter(&chan->adapter);
+	i2c_del_adapter(&chan->base);
 	kfree(chan);
 }

drivers/gpu/drm/gma500/oaktrail_lvds.c

@@ -359,7 +359,7 @@ void oaktrail_lvds_init(struct drm_device *dev,
 	if (edid == NULL && dev_priv->lpc_gpio_base) {
 		oaktrail_lvds_i2c_init(encoder);
 		if (gma_encoder->ddc_bus != NULL) {
-			i2c_adap = &gma_encoder->ddc_bus->adapter;
+			i2c_adap = &gma_encoder->ddc_bus->base;
 			edid = drm_get_edid(connector, i2c_adap);
 		}
 	}

drivers/gpu/drm/gma500/oaktrail_lvds_i2c.c

@@ -142,10 +142,10 @@ void oaktrail_lvds_i2c_init(struct drm_encoder *encoder)
 
 	chan->drm_dev = dev;
 	chan->reg = dev_priv->lpc_gpio_base;
-	strncpy(chan->adapter.name, "gma500 LPC",  I2C_NAME_SIZE - 1);
-	chan->adapter.owner = THIS_MODULE;
-	chan->adapter.algo_data = &chan->algo;
-	chan->adapter.dev.parent = dev->dev;
+	strncpy(chan->base.name, "gma500 LPC",  I2C_NAME_SIZE - 1);
+	chan->base.owner = THIS_MODULE;
+	chan->base.algo_data = &chan->algo;
+	chan->base.dev.parent = dev->dev;
 	chan->algo.setsda = set_data;
 	chan->algo.setscl = set_clock;
 	chan->algo.getsda = get_data;
@@ -154,13 +154,13 @@ void oaktrail_lvds_i2c_init(struct drm_encoder *encoder)
 	chan->algo.timeout = usecs_to_jiffies(2200);
 	chan->algo.data = chan;
 
-	i2c_set_adapdata(&chan->adapter, chan);
+	i2c_set_adapdata(&chan->base, chan);
 
 	set_data(chan, 1);
 	set_clock(chan, 1);
 	udelay(50);
 
-	if (i2c_bit_add_bus(&chan->adapter)) {
+	if (i2c_bit_add_bus(&chan->base)) {
 		kfree(chan);
 		return;
 	}

drivers/gpu/drm/gma500/psb_intel_drv.h

@@ -79,12 +79,13 @@ struct psb_intel_mode_device {
 };
 
 struct gma_i2c_chan {
-	/* for getting at dev. private (mmio etc.) */
-	struct drm_device *drm_dev;
-	u32 reg;		/* GPIO reg */
-	struct i2c_adapter adapter;
+	struct i2c_adapter base;
 	struct i2c_algo_bit_data algo;
 	u8 slave_addr;
+
+	/* for getting at dev. private (mmio etc.) */
+	struct drm_device *drm_dev;
+	u32 reg; /* GPIO reg */
 };
 
 struct gma_encoder {
@@ -175,6 +176,8 @@ struct gma_crtc {
 		container_of(x, struct gma_encoder, base)
 #define to_psb_intel_framebuffer(x)	\
 		container_of(x, struct psb_intel_framebuffer, base)
+#define to_gma_i2c_chan(x)	\
+		container_of(x, struct gma_i2c_chan, base)
 
 struct gma_i2c_chan *gma_i2c_create(struct drm_device *dev, const u32 reg,
 				    const char *name);

drivers/gpu/drm/gma500/psb_intel_lvds.c

@@ -113,7 +113,7 @@ static int psb_lvds_i2c_set_brightness(struct drm_device *dev,
 	out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
 	out_buf[1] = (u8)blc_i2c_brightness;
 
-	if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) {
+	if (i2c_transfer(&lvds_i2c_bus->base, msgs, 1) == 1) {
 		dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n",
 			dev_priv->lvds_bl->brightnesscmd,
 			blc_i2c_brightness);
@@ -497,7 +497,7 @@ static int psb_intel_lvds_get_modes(struct drm_connector *connector)
 	int ret = 0;
 
 	if (!IS_MRST(dev))
-		ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter);
+		ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->base);
 
 	if (ret)
 		return ret;
@@ -727,7 +727,7 @@ void psb_intel_lvds_init(struct drm_device *dev,
 	 * preferred mode is the right one.
 	 */
 	mutex_lock(&dev->mode_config.mutex);
-	psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter);
+	psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->base);
 	list_for_each_entry(scan, &connector->probed_modes, head) {
 		if (scan->type & DRM_MODE_TYPE_PREFERRED) {
 			mode_dev->panel_fixed_mode =