[PATCH v2 2/4] drm: exynos: dsi: Use drm panel_bridge API
Jagan Teki
jagan at amarulasolutions.com
Fri Dec 10 19:19:20 UTC 2021
Replace the manual panel handling code by a drm panel_bridge via
devm_drm_of_get_bridge().
Adding panel_bridge handling,
- Drops drm_connector and related operations as drm_bridge_attach
creates connector during attachment.
- Drops panel pointer and iterate the bridge, so-that it can operate
the normal bridge and panel_bridge in constitutive callbacks.
This simplifies the driver and allows all components in the display
pipeline to be treated as bridges.
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
Changes for v2:
- new patch
drivers/gpu/drm/exynos/exynos_drm_dsi.c | 147 +++---------------------
1 file changed, 14 insertions(+), 133 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 0bb44e476633..8c6f7ac82822 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -254,8 +254,6 @@ struct exynos_dsi_driver_data {
struct exynos_dsi {
struct drm_encoder encoder;
struct mipi_dsi_host dsi_host;
- struct drm_connector connector;
- struct drm_panel *panel;
struct list_head bridge_chain;
struct drm_bridge *out_bridge;
struct device *dev;
@@ -285,7 +283,6 @@ struct exynos_dsi {
};
#define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host)
-#define connector_to_dsi(c) container_of(c, struct exynos_dsi, connector)
static inline struct exynos_dsi *encoder_to_dsi(struct drm_encoder *e)
{
@@ -1391,42 +1388,21 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
dsi->state |= DSIM_STATE_ENABLED;
- if (dsi->panel) {
- ret = drm_panel_prepare(dsi->panel);
- if (ret < 0)
- goto err_put_sync;
- } else {
- list_for_each_entry_reverse(iter, &dsi->bridge_chain,
- chain_node) {
- if (iter->funcs->pre_enable)
- iter->funcs->pre_enable(iter);
- }
+ list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) {
+ if (iter->funcs->pre_enable)
+ iter->funcs->pre_enable(iter);
}
exynos_dsi_set_display_mode(dsi);
exynos_dsi_set_display_enable(dsi, true);
- if (dsi->panel) {
- ret = drm_panel_enable(dsi->panel);
- if (ret < 0)
- goto err_display_disable;
- } else {
- list_for_each_entry(iter, &dsi->bridge_chain, chain_node) {
- if (iter->funcs->enable)
- iter->funcs->enable(iter);
- }
+ list_for_each_entry(iter, &dsi->bridge_chain, chain_node) {
+ if (iter->funcs->enable)
+ iter->funcs->enable(iter);
}
dsi->state |= DSIM_STATE_VIDOUT_AVAILABLE;
return;
-
-err_display_disable:
- exynos_dsi_set_display_enable(dsi, false);
- drm_panel_unprepare(dsi->panel);
-
-err_put_sync:
- dsi->state &= ~DSIM_STATE_ENABLED;
- pm_runtime_put(dsi->dev);
}
static void exynos_dsi_disable(struct drm_encoder *encoder)
@@ -1439,17 +1415,12 @@ static void exynos_dsi_disable(struct drm_encoder *encoder)
dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;
- if (dsi->panel)
- drm_panel_disable(dsi->panel);
-
list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) {
if (iter->funcs->disable)
iter->funcs->disable(iter);
}
exynos_dsi_set_display_enable(dsi, false);
- if (dsi->panel)
- drm_panel_unprepare(dsi->panel);
list_for_each_entry(iter, &dsi->bridge_chain, chain_node) {
if (iter->funcs->post_disable)
@@ -1460,70 +1431,6 @@ static void exynos_dsi_disable(struct drm_encoder *encoder)
pm_runtime_put_sync(dsi->dev);
}
-static enum drm_connector_status
-exynos_dsi_detect(struct drm_connector *connector, bool force)
-{
- return connector->status;
-}
-
-static void exynos_dsi_connector_destroy(struct drm_connector *connector)
-{
- drm_connector_unregister(connector);
- drm_connector_cleanup(connector);
- connector->dev = NULL;
-}
-
-static const struct drm_connector_funcs exynos_dsi_connector_funcs = {
- .detect = exynos_dsi_detect,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = exynos_dsi_connector_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 int exynos_dsi_get_modes(struct drm_connector *connector)
-{
- struct exynos_dsi *dsi = connector_to_dsi(connector);
-
- if (dsi->panel)
- return drm_panel_get_modes(dsi->panel, connector);
-
- return 0;
-}
-
-static const struct drm_connector_helper_funcs exynos_dsi_connector_helper_funcs = {
- .get_modes = exynos_dsi_get_modes,
-};
-
-static int exynos_dsi_create_connector(struct drm_encoder *encoder)
-{
- struct exynos_dsi *dsi = encoder_to_dsi(encoder);
- struct drm_connector *connector = &dsi->connector;
- struct drm_device *drm = encoder->dev;
- int ret;
-
- connector->polled = DRM_CONNECTOR_POLL_HPD;
-
- ret = drm_connector_init(drm, connector, &exynos_dsi_connector_funcs,
- DRM_MODE_CONNECTOR_DSI);
- if (ret) {
- DRM_DEV_ERROR(dsi->dev,
- "Failed to initialize connector with drm\n");
- return ret;
- }
-
- connector->status = connector_status_disconnected;
- drm_connector_helper_add(connector, &exynos_dsi_connector_helper_funcs);
- drm_connector_attach_encoder(connector, encoder);
- if (!drm->registered)
- return 0;
-
- connector->funcs->reset(connector);
- drm_connector_register(connector);
- return 0;
-}
-
static const struct drm_encoder_helper_funcs exynos_dsi_encoder_helper_funcs = {
.enable = exynos_dsi_enable,
.disable = exynos_dsi_disable,
@@ -1537,30 +1444,13 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
struct exynos_dsi *dsi = host_to_dsi(host);
struct drm_encoder *encoder = &dsi->encoder;
struct drm_device *drm = encoder->dev;
- struct drm_bridge *out_bridge;
- out_bridge = of_drm_find_bridge(device->dev.of_node);
- if (out_bridge) {
- drm_bridge_attach(encoder, out_bridge, NULL, 0);
- dsi->out_bridge = out_bridge;
- list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain);
- } else {
- int ret = exynos_dsi_create_connector(encoder);
-
- if (ret) {
- DRM_DEV_ERROR(dsi->dev,
- "failed to create connector ret = %d\n",
- ret);
- drm_encoder_cleanup(encoder);
- return ret;
- }
+ dsi->out_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, 0, 0);
+ if (IS_ERR(dsi->out_bridge))
+ return PTR_ERR(dsi->out_bridge);
- dsi->panel = of_drm_find_panel(device->dev.of_node);
- if (IS_ERR(dsi->panel))
- dsi->panel = NULL;
- else
- dsi->connector.status = connector_status_connected;
- }
+ drm_bridge_attach(encoder, dsi->out_bridge, NULL, 0);
+ list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain);
/*
* This is a temporary solution and should be made by more generic way.
@@ -1596,18 +1486,9 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
struct exynos_dsi *dsi = host_to_dsi(host);
struct drm_device *drm = dsi->encoder.dev;
- if (dsi->panel) {
- mutex_lock(&drm->mode_config.mutex);
- exynos_dsi_disable(&dsi->encoder);
- dsi->panel = NULL;
- dsi->connector.status = connector_status_disconnected;
- mutex_unlock(&drm->mode_config.mutex);
- } else {
- if (dsi->out_bridge->funcs->detach)
- dsi->out_bridge->funcs->detach(dsi->out_bridge);
- dsi->out_bridge = NULL;
- INIT_LIST_HEAD(&dsi->bridge_chain);
- }
+ if (dsi->out_bridge->funcs->detach)
+ dsi->out_bridge->funcs->detach(dsi->out_bridge);
+ INIT_LIST_HEAD(&dsi->bridge_chain);
if (drm->mode_config.poll_enabled)
drm_kms_helper_hotplug_event(drm);
--
2.25.1
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