Hi
Am 14.01.25 um 22:38 schrieb Sasha Finkelstein via B4 Relay:
[...]
+
+static int adp_setup_mode_config(struct adp_drv_private *adp)
+{
+ struct drm_device *drm = &adp->drm;
+ int ret;
+ u32 size;
+
+ ret = drmm_mode_config_init(drm);
+ if (ret)
+ return ret;
+
+ /*
+ * Query screen size restrict the frame buffer size to the screen size
+ * aligned to the next multiple of 64. This is not necessary but can be
+ * used as simple check for non-desktop devices.
+ * Xorg's modesetting driver does not care about the connector
+ * "non-desktop" property. The max frame buffer width or height can be
+ * easily checked and a device can be reject if the max width/height is
+ * smaller than 120 for example.
+ * Any touchbar daemon is not limited by this small framebuffer size.
+ */
+ size = readl(adp->fe + ADP_SCREEN_SIZE);
+
+ drm->mode_config.min_width = 32;
+ drm->mode_config.min_height = 32;
+ drm->mode_config.max_width = ALIGN(FIELD_GET(ADP_SCREEN_HSIZE, size),
64);
+ drm->mode_config.max_height = ALIGN(FIELD_GET(ADP_SCREEN_VSIZE, size),
64);
+ drm->mode_config.preferred_depth = 24;
+ drm->mode_config.prefer_shadow = 0;
+ drm->mode_config.funcs = &adp_mode_config_funcs;
+
+ ret = adp_setup_crtc(adp);
+ if (ret) {
+ drm_err(drm, "failed to create crtc");
+ return ret;
+ }
+
+ adp->encoder.possible_crtcs = ALL_CRTCS;
+ ret = drm_simple_encoder_init(drm, &adp->encoder, DRM_MODE_ENCODER_DSI);
Please do not use drm_simple_encoder_init(). It was a bad idea and is
deprecated. Open coding it in your driver should resolve the problem.
Best regards
Thomas
+ if (ret) {
+ drm_err(drm, "failed to init encoder");
+ return ret;
+ }
+
+ ret = drm_bridge_attach(&adp->encoder, adp->next_bridge, NULL,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (ret) {
+ drm_err(drm, "failed to init bridge chain");
+ return ret;
+ }
+
+ adp->connector = drm_bridge_connector_init(drm, &adp->encoder);
+ if (IS_ERR(adp->connector))
+ return PTR_ERR(adp->connector);
+
+ drm_connector_attach_encoder(adp->connector, &adp->encoder);
+
+ ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+ if (ret < 0) {
+ drm_err(drm, "failed to initialize vblank");
+ return ret;
+ }
+
+ drm_mode_config_reset(drm);
+
+ return 0;
+}
+
+static int adp_parse_of(struct platform_device *pdev, struct adp_drv_private
*adp)
+{
+ struct device *dev = &pdev->dev;
+
+ adp->be = devm_platform_ioremap_resource_byname(pdev, "be");
+ if (IS_ERR(adp->be)) {
+ dev_err(dev, "failed to map display backend mmio");
+ return PTR_ERR(adp->be);
+ }
+
+ adp->fe = devm_platform_ioremap_resource_byname(pdev, "fe");
+ if (IS_ERR(adp->fe)) {
+ dev_err(dev, "failed to map display pipe mmio");
+ return PTR_ERR(adp->fe);
+ }
+
+ adp->be_irq = platform_get_irq_byname(pdev, "be");
+ if (adp->be_irq < 0) {
+ dev_err(dev, "failed to find be irq");
+ return adp->be_irq;
+ }
+
+ adp->fe_irq = platform_get_irq_byname(pdev, "fe");
+ if (adp->fe_irq < 0) {
+ dev_err(dev, "failed to find fe irq");
+ return adp->fe_irq;
+ }
+
+ adp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0);
+ if (IS_ERR(adp->next_bridge)) {
+ if (PTR_ERR(adp->next_bridge) != EPROBE_DEFER)
+ dev_err(dev, "failed to find next bridge");
+ return PTR_ERR(adp->next_bridge);
+ }
+
+ return 0;
+}
+
+static irqreturn_t adp_fe_irq(int irq, void *arg)
+{
+ struct adp_drv_private *adp = (struct adp_drv_private *)arg;
+ u32 int_status;
+ u32 int_ctl;
+
+ spin_lock(&adp->irq_lock);
+
+ int_status = readl(adp->fe + ADP_INT_STATUS);
+ if (int_status & ADP_INT_STATUS_VBLANK) {
+ drm_crtc_handle_vblank(&adp->crtc);
+ spin_lock(&adp->crtc.dev->event_lock);
+ if (adp->event) {
+ int_ctl = readl(adp->fe + ADP_CTRL);
+ if ((int_ctl & 0xF00) == 0x600) {
+ drm_crtc_send_vblank_event(&adp->crtc,
adp->event);
+ adp->event = NULL;
+ drm_crtc_vblank_put(&adp->crtc);
+ }
+ }
+ spin_unlock(&adp->crtc.dev->event_lock);
+ }
+
+ writel(int_status, adp->fe + ADP_INT_STATUS);
+
+ spin_unlock(&adp->irq_lock);
+
+ return IRQ_HANDLED;
+}
+
+static int adp_probe(struct platform_device *pdev)
+{
+ struct adp_drv_private *adp;
+ int err;
+
+ adp = devm_drm_dev_alloc(&pdev->dev, &adp_driver, struct
adp_drv_private, drm);
+ if (IS_ERR(adp))
+ return PTR_ERR(adp);
+
+ spin_lock_init(&adp->irq_lock);
+
+ dev_set_drvdata(&pdev->dev, &adp->drm);
+
+ err = adp_parse_of(pdev, adp);
+ if (err < 0)
+ return err;
+
+ adp_disable_vblank(adp);
+ writel(ADP_CTRL_FIFO_ON | ADP_CTRL_VBLANK_ON, adp->fe + ADP_CTRL);
+
+ err = adp_setup_mode_config(adp);
+ if (err < 0)
+ return err;
+
+ err = devm_request_irq(&pdev->dev, adp->fe_irq, adp_fe_irq, 0,
+ "adp-fe", adp);
+ if (err)
+ return err;
+
+ err = drm_dev_register(&adp->drm, 0);
+ if (err)
+ return err;
+ return 0;
+}
+
+static void adp_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct drm_device *drm = dev_get_drvdata(dev);
+ struct adp_drv_private *adp = to_adp(drm);
+
+ adp_disable_vblank(adp);
+ drm_dev_unregister(drm);
+ dev_set_drvdata(dev, NULL);
+ drm_atomic_helper_shutdown(drm);
+}
+
+static const struct of_device_id adp_of_match[] = {
+ { .compatible = "apple,h7-display-pipe", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, adp_of_match);
+
+static struct platform_driver adp_platform_driver = {
+ .driver = {
+ .name = "adp",
+ .of_match_table = adp_of_match,
+ },
+ .probe = adp_probe,
+ .remove = adp_remove,
+};
+
+module_platform_driver(adp_platform_driver);
+
+MODULE_DESCRIPTION("Apple Display Pipe DRM driver");
+MODULE_LICENSE("GPL");
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
