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drm/exynos/dsi: refactor panel detection logic 

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@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Andrzej Hajda 2017-08-24 15:33:52 +02:00 committed by Inki Dae
parent 1ca582f10e
commit 295e7954c0
1 changed files with 102 additions and 101 deletions
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203
drivers/gpu/drm/exynos/exynos_drm_dsi.c
View File

@ -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)
@ -1575,6 +1478,7 @@ 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);
@ -1611,6 +1515,103 @@ 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)
{