Description of drm_helper_hpd_irq_event clearly states that drivers
supporting hotplug events per connector should use different helper -
drm_kms_helper_hotplug_event. To achieve it following changes have
been performed:
- moved down all DSI ops - they require exynos_dsi_disable function
to be defined earlier,
- simplified exynos_dsi_detect - there is no real detection, it just
returns if panel is attached,
- DSI attach/detach callbacks attaches/detaches DRM panel and sets
connector status and other context fields accordingly, all this is
performed under mutex, as these callbacks are asynchronous.
Signed-off-by: Andrzej Hajda <a.hajda at samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_dsi.c | 204 ++++++++++++++++----------------
1 file changed, 103 insertions(+), 101 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 3ae459f..515090f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -254,7 +254,6 @@ struct exynos_dsi {
struct drm_encoder encoder;
struct mipi_dsi_host dsi_host;
struct drm_connector connector;
- struct device_node *panel_node;
struct drm_panel *panel;
struct device *dev;
@@ -1329,12 +1328,13 @@ static int exynos_dsi_init(struct exynos_dsi *dsi)
return 0;
}
-static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi)
+static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi,
+ struct device *panel)
{
int ret;
int te_gpio_irq;
- dsi->te_gpio = of_get_named_gpio(dsi->panel_node, "te-gpios", 0);
+ dsi->te_gpio = of_get_named_gpio(panel->of_node, "te-gpios", 0);
if (dsi->te_gpio == -ENOENT)
return 0;
@@ -1374,85 +1374,6 @@ static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi)
}
}
-static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
- struct mipi_dsi_device *device)
-{
- struct exynos_dsi *dsi = host_to_dsi(host);
-
- dsi->lanes = device->lanes;
- dsi->format = device->format;
- dsi->mode_flags = device->mode_flags;
- dsi->panel_node = device->dev.of_node;
-
- /*
- * This is a temporary solution and should be made by more generic way.
- *
- * If attached panel device is for command mode one, dsi should register
- * TE interrupt handler.
- */
- if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO)) {
- int ret = exynos_dsi_register_te_irq(dsi);
-
- if (ret)
- return ret;
- }
-
- if (dsi->connector.dev)
- drm_helper_hpd_irq_event(dsi->connector.dev);
-
- return 0;
-}
-
-static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
- struct mipi_dsi_device *device)
-{
- struct exynos_dsi *dsi = host_to_dsi(host);
-
- exynos_dsi_unregister_te_irq(dsi);
-
- dsi->panel_node = NULL;
-
- if (dsi->connector.dev)
- drm_helper_hpd_irq_event(dsi->connector.dev);
-
- return 0;
-}
-
-static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host,
- const struct mipi_dsi_msg *msg)
-{
- struct exynos_dsi *dsi = host_to_dsi(host);
- struct exynos_dsi_transfer xfer;
- int ret;
-
- if (!(dsi->state & DSIM_STATE_ENABLED))
- return -EINVAL;
-
- if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
- ret = exynos_dsi_init(dsi);
- if (ret)
- return ret;
- dsi->state |= DSIM_STATE_INITIALIZED;
- }
-
- ret = mipi_dsi_create_packet(&xfer.packet, msg);
- if (ret < 0)
- return ret;
-
- xfer.rx_len = msg->rx_len;
- xfer.rx_payload = msg->rx_buf;
- xfer.flags = msg->flags;
-
- ret = exynos_dsi_transfer(dsi, &xfer);
- return (ret < 0) ? ret : xfer.rx_done;
-}
-
-static const struct mipi_dsi_host_ops exynos_dsi_ops = {
- .attach = exynos_dsi_host_attach,
- .detach = exynos_dsi_host_detach,
- .transfer = exynos_dsi_host_transfer,
-};
-
static void exynos_dsi_enable(struct drm_encoder *encoder)
{
struct exynos_dsi *dsi = encoder_to_dsi(encoder);
@@ -1508,25 +1429,7 @@ static void exynos_dsi_disable(struct drm_encoder *encoder)
static enum drm_connector_status
exynos_dsi_detect(struct drm_connector *connector, bool force)
{
- struct exynos_dsi *dsi = connector_to_dsi(connector);
-
- if (!dsi->panel) {
- dsi->panel = of_drm_find_panel(dsi->panel_node);
- if (dsi->panel)
- drm_panel_attach(dsi->panel, &dsi->connector);
- } else if (!dsi->panel_node) {
- struct drm_encoder *encoder;
-
- encoder = platform_get_drvdata(to_platform_device(dsi->dev));
- exynos_dsi_disable(encoder);
- drm_panel_detach(dsi->panel);
- dsi->panel = NULL;
- }
-
- if (dsi->panel)
- return connector_status_connected;
-
- return connector_status_disconnected;
+ return connector->status;
}
static void exynos_dsi_connector_destroy(struct drm_connector *connector)
@@ -1576,6 +1479,7 @@ static int exynos_dsi_create_connector(struct drm_encoder *encoder)
return ret;
}
+ connector->status = connector_status_disconnected;
drm_connector_helper_add(connector, &exynos_dsi_connector_helper_funcs);
drm_mode_connector_attach_encoder(connector, encoder);
@@ -1612,6 +1516,104 @@ static const struct drm_encoder_funcs exynos_dsi_encoder_funcs = {
MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
+static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *device)
+{
+ struct exynos_dsi *dsi = host_to_dsi(host);
+ struct drm_device *drm = dsi->connector.dev;
+
+ /*
+ * This is a temporary solution and should be made by more generic way.
+ *
+ * If attached panel device is for command mode one, dsi should register
+ * TE interrupt handler.
+ */
+ if (!(device->mode_flags & MIPI_DSI_MODE_VIDEO)) {
+ int ret = exynos_dsi_register_te_irq(dsi, &device->dev);
+
+ if (ret)
+ return ret;
+ }
+
+ mutex_lock(&drm->mode_config.mutex);
+
+ dsi->lanes = device->lanes;
+ dsi->format = device->format;
+ dsi->mode_flags = device->mode_flags;
+ dsi->panel = of_drm_find_panel(device->dev.of_node);
+ if (dsi->panel) {
+ drm_panel_attach(dsi->panel, &dsi->connector);
+ dsi->connector.status = connector_status_connected;
+ }
+
+ mutex_unlock(&drm->mode_config.mutex);
+
+ if (drm->mode_config.poll_enabled)
+ drm_kms_helper_hotplug_event(drm);
+
+ return 0;
+}
+
+static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *device)
+{
+ struct exynos_dsi *dsi = host_to_dsi(host);
+ struct drm_device *drm = dsi->connector.dev;
+
+ mutex_lock(&drm->mode_config.mutex);
+
+ if (dsi->panel) {
+ exynos_dsi_disable(&dsi->encoder);
+ drm_panel_detach(dsi->panel);
+ dsi->panel = NULL;
+ dsi->connector.status = connector_status_disconnected;
+ }
+
+ mutex_unlock(&drm->mode_config.mutex);
+
+ if (drm->mode_config.poll_enabled)
+ drm_kms_helper_hotplug_event(drm);
+
+ exynos_dsi_unregister_te_irq(dsi);
+
+ return 0;
+}
+
+static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host,
+ const struct mipi_dsi_msg *msg)
+{
+ struct exynos_dsi *dsi = host_to_dsi(host);
+ struct exynos_dsi_transfer xfer;
+ int ret;
+
+ if (!(dsi->state & DSIM_STATE_ENABLED))
+ return -EINVAL;
+
+ if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
+ ret = exynos_dsi_init(dsi);
+ if (ret)
+ return ret;
+ dsi->state |= DSIM_STATE_INITIALIZED;
+ }
+
+ ret = mipi_dsi_create_packet(&xfer.packet, msg);
+ if (ret < 0)
+ return ret;
+
+ xfer.rx_len = msg->rx_len;
+ xfer.rx_payload = msg->rx_buf;
+ xfer.flags = msg->flags;
+
+ ret = exynos_dsi_transfer(dsi, &xfer);
+ return (ret < 0) ? ret : xfer.rx_done;
+}
+
+static const struct mipi_dsi_host_ops exynos_dsi_ops = {
+ .attach = exynos_dsi_host_attach,
+ .detach = exynos_dsi_host_detach,
+ .transfer = exynos_dsi_host_transfer,
+};
+
static int exynos_dsi_of_read_u32(const struct device_node *np,
const char *propname, u32 *out_value)
{
--
2.7.4