commit f01195148967 ("drm/mediatek: mtk_dpi: Create connector for bridges") broke the display support for elm device since mtk_dpi calls drm_bridge_attach with the flag DRM_BRIDGE_ATTACH_NO_CONNECTOR while mtk_hdmi does not yet support this flag.
Fix this by accepting DRM_BRIDGE_ATTACH_NO_CONNECTOR in bridge attachment. Implement the drm_bridge_funcs .detect() and .get_edid() operations, and call drm_bridge_hpd_notify() to report HPD. This provides the necessary API to support disabling connector creation.
This patch is inspired by a similar patch for bridge/synopsys/dw-hdmi.c: commit ec971aaa6775 ("drm: bridge: dw-hdmi: Make connector creation optional") But with the difference that in mtk-hdmi only the option of not creating a connector is supported.
Fixes: f01195148967 ("drm/mediatek: mtk_dpi: Create connector for bridges") Signed-off-by: Dafna Hirschfeld dafna.hirschfeld@collabora.com --- drivers/gpu/drm/mediatek/mtk_hdmi.c | 129 ++++++++++------------------ 1 file changed, 44 insertions(+), 85 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c index f2c810b767ef..1eeb211b1536 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -186,11 +186,6 @@ static inline struct mtk_hdmi *hdmi_ctx_from_bridge(struct drm_bridge *b) return container_of(b, struct mtk_hdmi, bridge); }
-static inline struct mtk_hdmi *hdmi_ctx_from_conn(struct drm_connector *c) -{ - return container_of(c, struct mtk_hdmi, conn); -} - static u32 mtk_hdmi_read(struct mtk_hdmi *hdmi, u32 offset) { return readl(hdmi->regs + offset); @@ -1201,48 +1196,30 @@ mtk_hdmi_update_plugged_status(struct mtk_hdmi *hdmi) connector_status_connected : connector_status_disconnected; }
-static enum drm_connector_status hdmi_conn_detect(struct drm_connector *conn, - bool force) -{ - struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn); - return mtk_hdmi_update_plugged_status(hdmi); -} - -static void hdmi_conn_destroy(struct drm_connector *conn) +static struct edid *mtk_hdmi_get_edid(struct mtk_hdmi *hdmi, + struct drm_connector *connector) { - struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn); - - mtk_cec_set_hpd_event(hdmi->cec_dev, NULL, NULL); - - drm_connector_cleanup(conn); -} - -static int mtk_hdmi_conn_get_modes(struct drm_connector *conn) -{ - struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn); struct edid *edid; - int ret;
if (!hdmi->ddc_adpt) - return -ENODEV; - - edid = drm_get_edid(conn, hdmi->ddc_adpt); + return NULL; + edid = drm_get_edid(connector, hdmi->ddc_adpt); if (!edid) - return -ENODEV; - + return NULL; hdmi->dvi_mode = !drm_detect_monitor_audio(edid); + return edid; +}
- drm_connector_update_edid_property(conn, edid); - - ret = drm_add_edid_modes(conn, edid); - kfree(edid); - return ret; +static enum drm_connector_status mtk_hdmi_detect(struct mtk_hdmi *hdmi) +{ + return mtk_hdmi_update_plugged_status(hdmi); }
-static int mtk_hdmi_conn_mode_valid(struct drm_connector *conn, - struct drm_display_mode *mode) +static int mtk_hdmi_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) { - struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn); + struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge); struct drm_bridge *next_bridge;
dev_dbg(hdmi->dev, "xres=%d, yres=%d, refresh=%d, intl=%d clock=%d\n", @@ -1267,74 +1244,50 @@ static int mtk_hdmi_conn_mode_valid(struct drm_connector *conn, return drm_mode_validate_size(mode, 0x1fff, 0x1fff); }
-static struct drm_encoder *mtk_hdmi_conn_best_enc(struct drm_connector *conn) -{ - struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn); - - return hdmi->bridge.encoder; -} - -static const struct drm_connector_funcs mtk_hdmi_connector_funcs = { - .detect = hdmi_conn_detect, - .fill_modes = drm_helper_probe_single_connector_modes, - .destroy = hdmi_conn_destroy, - .reset = drm_atomic_helper_connector_reset, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, -}; - -static const struct drm_connector_helper_funcs - mtk_hdmi_connector_helper_funcs = { - .get_modes = mtk_hdmi_conn_get_modes, - .mode_valid = mtk_hdmi_conn_mode_valid, - .best_encoder = mtk_hdmi_conn_best_enc, -}; - static void mtk_hdmi_hpd_event(bool hpd, struct device *dev) { struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
- if (hdmi && hdmi->bridge.encoder && hdmi->bridge.encoder->dev) + if (hdmi && hdmi->bridge.encoder && hdmi->bridge.encoder->dev) { + static enum drm_connector_status status; + + status = mtk_hdmi_detect(hdmi); drm_helper_hpd_irq_event(hdmi->bridge.encoder->dev); + drm_bridge_hpd_notify(&hdmi->bridge, status); + } }
/* * Bridge callbacks */
+static enum drm_connector_status mtk_hdmi_bridge_detect(struct drm_bridge *bridge) +{ + struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge); + + return mtk_hdmi_detect(hdmi); +} + +static struct edid *mtk_hdmi_bridge_get_edid(struct drm_bridge *bridge, + struct drm_connector *connector) +{ + struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge); + + return mtk_hdmi_get_edid(hdmi, connector); +} + static int mtk_hdmi_bridge_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge); int ret;
- if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { - DRM_ERROR("Fix bridge driver to make connector optional!"); + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { + DRM_ERROR("%s: The flag DRM_BRIDGE_ATTACH_NO_CONNECTOR must be supplied\n", + __func__); return -EINVAL; }
- ret = drm_connector_init_with_ddc(bridge->encoder->dev, &hdmi->conn, - &mtk_hdmi_connector_funcs, - DRM_MODE_CONNECTOR_HDMIA, - hdmi->ddc_adpt); - if (ret) { - dev_err(hdmi->dev, "Failed to initialize connector: %d\n", ret); - return ret; - } - drm_connector_helper_add(&hdmi->conn, &mtk_hdmi_connector_helper_funcs); - - hdmi->conn.polled = DRM_CONNECTOR_POLL_HPD; - hdmi->conn.interlace_allowed = true; - hdmi->conn.doublescan_allowed = false; - - ret = drm_connector_attach_encoder(&hdmi->conn, - bridge->encoder); - if (ret) { - dev_err(hdmi->dev, - "Failed to attach connector to encoder: %d\n", ret); - return ret; - } - if (hdmi->next_bridge) { ret = drm_bridge_attach(bridge->encoder, hdmi->next_bridge, bridge, flags); @@ -1444,6 +1397,7 @@ static void mtk_hdmi_bridge_atomic_enable(struct drm_bridge *bridge, }
static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = { + .mode_valid = mtk_hdmi_bridge_mode_valid, .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_reset = drm_atomic_helper_bridge_reset, @@ -1454,6 +1408,8 @@ static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = { .mode_set = mtk_hdmi_bridge_mode_set, .atomic_pre_enable = mtk_hdmi_bridge_atomic_pre_enable, .atomic_enable = mtk_hdmi_bridge_atomic_enable, + .detect = mtk_hdmi_bridge_detect, + .get_edid = mtk_hdmi_bridge_get_edid, };
static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi, @@ -1762,6 +1718,9 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev)
hdmi->bridge.funcs = &mtk_hdmi_bridge_funcs; hdmi->bridge.of_node = pdev->dev.of_node; + hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID + | DRM_BRIDGE_OP_HPD; + hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA; drm_bridge_add(&hdmi->bridge);
ret = mtk_hdmi_clk_enable_audio(hdmi);