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https://github.com/edk2-porting/linux-next.git
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drm/i2c: tda998x: convert to bridge driver
Convert tda998x to a bridge driver with built-in encoder support for compatibility with existing component drivers. Tested-by: Peter Rosin <peda@axentia.se> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King
parent
6c1187aaa2
commit
30bd8b862f
@ -69,6 +69,7 @@ struct tda998x_priv {
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bool edid_delay_active;
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struct drm_encoder encoder;
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struct drm_bridge bridge;
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struct drm_connector connector;
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struct tda998x_audio_port audio_port[2];
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@ -79,9 +80,10 @@ struct tda998x_priv {
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#define conn_to_tda998x_priv(x) \
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container_of(x, struct tda998x_priv, connector)
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#define enc_to_tda998x_priv(x) \
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container_of(x, struct tda998x_priv, encoder)
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#define bridge_to_tda998x_priv(x) \
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container_of(x, struct tda998x_priv, bridge)
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/* The TDA9988 series of devices use a paged register scheme.. to simplify
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* things we encode the page # in upper bits of the register #. To read/
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@ -1271,7 +1273,7 @@ tda998x_connector_best_encoder(struct drm_connector *connector)
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{
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struct tda998x_priv *priv = conn_to_tda998x_priv(connector);
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return &priv->encoder;
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return priv->bridge.encoder;
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}
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static
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@ -1301,15 +1303,32 @@ static int tda998x_connector_init(struct tda998x_priv *priv,
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if (ret)
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return ret;
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drm_mode_connector_attach_encoder(&priv->connector, &priv->encoder);
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drm_mode_connector_attach_encoder(&priv->connector,
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priv->bridge.encoder);
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return 0;
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}
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/* DRM encoder functions */
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/* DRM bridge functions */
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static void tda998x_enable(struct tda998x_priv *priv)
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static int tda998x_bridge_attach(struct drm_bridge *bridge)
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{
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struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
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return tda998x_connector_init(priv, bridge->dev);
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}
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static void tda998x_bridge_detach(struct drm_bridge *bridge)
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{
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struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
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drm_connector_cleanup(&priv->connector);
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}
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static void tda998x_bridge_enable(struct drm_bridge *bridge)
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{
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struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
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if (!priv->is_on) {
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/* enable video ports, audio will be enabled later */
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reg_write(priv, REG_ENA_VP_0, 0xff);
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@ -1324,8 +1343,10 @@ static void tda998x_enable(struct tda998x_priv *priv)
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}
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}
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static void tda998x_disable(struct tda998x_priv *priv)
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static void tda998x_bridge_disable(struct drm_bridge *bridge)
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{
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struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
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if (priv->is_on) {
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/* disable video ports */
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reg_write(priv, REG_ENA_VP_0, 0x00);
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@ -1336,29 +1357,11 @@ static void tda998x_disable(struct tda998x_priv *priv)
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}
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}
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static void tda998x_encoder_dpms(struct drm_encoder *encoder, int mode)
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static void tda998x_bridge_mode_set(struct drm_bridge *bridge,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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struct tda998x_priv *priv = enc_to_tda998x_priv(encoder);
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bool on;
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/* we only care about on or off: */
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on = mode == DRM_MODE_DPMS_ON;
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if (on == priv->is_on)
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return;
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if (on)
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tda998x_enable(priv);
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else
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tda998x_disable(priv);
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}
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static void
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tda998x_encoder_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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struct tda998x_priv *priv = enc_to_tda998x_priv(encoder);
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struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
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u16 ref_pix, ref_line, n_pix, n_line;
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u16 hs_pix_s, hs_pix_e;
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u16 vs1_pix_s, vs1_pix_e, vs1_line_s, vs1_line_e;
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@ -1565,8 +1568,18 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
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mutex_unlock(&priv->audio_mutex);
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}
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static const struct drm_bridge_funcs tda998x_bridge_funcs = {
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.attach = tda998x_bridge_attach,
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.detach = tda998x_bridge_detach,
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.disable = tda998x_bridge_disable,
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.mode_set = tda998x_bridge_mode_set,
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.enable = tda998x_bridge_enable,
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};
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static void tda998x_destroy(struct tda998x_priv *priv)
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{
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drm_bridge_remove(&priv->bridge);
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/* disable all IRQs and free the IRQ handler */
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cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
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reg_clear(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
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@ -1659,6 +1672,7 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
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mutex_init(&priv->mutex); /* protect the page access */
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mutex_init(&priv->audio_mutex); /* protect access from audio thread */
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mutex_init(&priv->edid_mutex);
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INIT_LIST_HEAD(&priv->bridge.list);
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init_waitqueue_head(&priv->edid_delay_waitq);
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timer_setup(&priv->edid_delay_timer, tda998x_edid_delay_done, 0);
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INIT_WORK(&priv->detect_work, tda998x_detect_work);
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@ -1819,43 +1833,25 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
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tda998x_set_config(priv, client->dev.platform_data);
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}
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priv->bridge.funcs = &tda998x_bridge_funcs;
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#ifdef CONFIG_OF
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priv->bridge.of_node = dev->of_node;
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#endif
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drm_bridge_add(&priv->bridge);
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return 0;
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fail:
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/* if encoder_init fails, the encoder slave is never registered,
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* so cleanup here:
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*/
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i2c_unregister_device(priv->cec);
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if (priv->cec_notify)
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cec_notifier_put(priv->cec_notify);
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if (client->irq)
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free_irq(client->irq, priv);
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tda998x_destroy(priv);
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err_irq:
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return ret;
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}
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static void tda998x_encoder_prepare(struct drm_encoder *encoder)
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{
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tda998x_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
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}
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static void tda998x_encoder_commit(struct drm_encoder *encoder)
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{
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tda998x_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
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}
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static const struct drm_encoder_helper_funcs tda998x_encoder_helper_funcs = {
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.dpms = tda998x_encoder_dpms,
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.prepare = tda998x_encoder_prepare,
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.commit = tda998x_encoder_commit,
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.mode_set = tda998x_encoder_mode_set,
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};
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/* DRM encoder functions */
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static void tda998x_encoder_destroy(struct drm_encoder *encoder)
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{
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struct tda998x_priv *priv = enc_to_tda998x_priv(encoder);
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tda998x_destroy(priv);
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drm_encoder_cleanup(encoder);
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}
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@ -1863,20 +1859,12 @@ static const struct drm_encoder_funcs tda998x_encoder_funcs = {
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.destroy = tda998x_encoder_destroy,
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};
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static int tda998x_bind(struct device *dev, struct device *master, void *data)
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static int tda998x_encoder_init(struct device *dev, struct drm_device *drm)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct drm_device *drm = data;
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struct tda998x_priv *priv;
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struct tda998x_priv *priv = dev_get_drvdata(dev);
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u32 crtcs = 0;
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int ret;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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dev_set_drvdata(dev, priv);
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if (dev->of_node)
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crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
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@ -1888,35 +1876,53 @@ static int tda998x_bind(struct device *dev, struct device *master, void *data)
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priv->encoder.possible_crtcs = crtcs;
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ret = tda998x_create(client, priv);
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if (ret)
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return ret;
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drm_encoder_helper_add(&priv->encoder, &tda998x_encoder_helper_funcs);
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ret = drm_encoder_init(drm, &priv->encoder, &tda998x_encoder_funcs,
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DRM_MODE_ENCODER_TMDS, NULL);
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if (ret)
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goto err_encoder;
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ret = tda998x_connector_init(priv, drm);
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ret = drm_bridge_attach(&priv->encoder, &priv->bridge, NULL);
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if (ret)
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goto err_connector;
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goto err_bridge;
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return 0;
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err_connector:
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err_bridge:
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drm_encoder_cleanup(&priv->encoder);
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err_encoder:
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tda998x_destroy(priv);
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return ret;
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}
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static int tda998x_bind(struct device *dev, struct device *master, void *data)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct drm_device *drm = data;
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struct tda998x_priv *priv;
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int ret;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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dev_set_drvdata(dev, priv);
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ret = tda998x_create(client, priv);
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if (ret)
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return ret;
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ret = tda998x_encoder_init(dev, drm);
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if (ret) {
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tda998x_destroy(priv);
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return ret;
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}
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return 0;
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}
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static void tda998x_unbind(struct device *dev, struct device *master,
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void *data)
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{
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struct tda998x_priv *priv = dev_get_drvdata(dev);
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drm_connector_cleanup(&priv->connector);
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drm_encoder_cleanup(&priv->encoder);
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tda998x_destroy(priv);
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}
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