From 244b2c5ca8b14627e4a17755e5922221e121c771 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 09 Oct 2024 06:15:07 +0000
Subject: [PATCH] change system file
---
kernel/include/drm/drm_panel.h | 276 ++++++++++++++++++++++++------------------------------
1 files changed, 122 insertions(+), 154 deletions(-)
diff --git a/kernel/include/drm/drm_panel.h b/kernel/include/drm/drm_panel.h
index 6aab8fe..33605c3 100644
--- a/kernel/include/drm/drm_panel.h
+++ b/kernel/include/drm/drm_panel.h
@@ -27,43 +27,18 @@
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/list.h>
-#include <linux/notifier.h>
-/* A hardware display blank change occurred */
-#define DRM_PANEL_EVENT_BLANK 0x01
-/* A hardware display blank early change occurred */
-#define DRM_PANEL_EARLY_EVENT_BLANK 0x02
-
-enum {
- /* panel: power on */
- DRM_PANEL_BLANK_UNBLANK,
- /* panel: power off */
- DRM_PANEL_BLANK_POWERDOWN,
-};
-
-struct drm_panel_notifier {
- int refresh_rate;
- void *data;
- uint32_t id;
-};
-
+struct backlight_device;
struct device_node;
struct drm_connector;
struct drm_device;
struct drm_panel;
struct display_timing;
+enum drm_panel_orientation;
+
/**
- * @loader_protect: protect loader logo panel's power
* struct drm_panel_funcs - perform operations on a given panel
- * @disable: disable panel (turn off back light, etc.)
- * @unprepare: turn off panel
- * @prepare: turn on panel and perform set up
- * @enable: enable panel (turn on back light, etc.)
- * @get_modes: add modes to the connector that the panel is attached to and
- * return the number of modes added
- * @get_timings: copy display timings into the provided array and return
- * the number of display timings available
*
* The .prepare() function is typically called before the display controller
* starts to transmit video data. Panel drivers can use this to turn the panel
@@ -87,164 +62,157 @@
*
* To save power when no video data is transmitted, a driver can power down
* the panel. This is the job of the .unprepare() function.
+ *
+ * Backlight can be handled automatically if configured using
+ * drm_panel_of_backlight(). Then the driver does not need to implement the
+ * functionality to enable/disable backlight.
*/
struct drm_panel_funcs {
- int (*loader_protect)(struct drm_panel *panel, bool on);
- int (*disable)(struct drm_panel *panel);
- int (*unprepare)(struct drm_panel *panel);
+ /**
+ * @prepare:
+ *
+ * Turn on panel and perform set up.
+ *
+ * This function is optional.
+ */
int (*prepare)(struct drm_panel *panel);
+
+ /**
+ * @enable:
+ *
+ * Enable panel (turn on back light, etc.).
+ *
+ * This function is optional.
+ */
int (*enable)(struct drm_panel *panel);
- int (*get_modes)(struct drm_panel *panel);
+
+ /**
+ * @disable:
+ *
+ * Disable panel (turn off back light, etc.).
+ *
+ * This function is optional.
+ */
+ int (*disable)(struct drm_panel *panel);
+
+ /**
+ * @unprepare:
+ *
+ * Turn off panel.
+ *
+ * This function is optional.
+ */
+ int (*unprepare)(struct drm_panel *panel);
+
+ /**
+ * @get_modes:
+ *
+ * Add modes to the connector that the panel is attached to
+ * and returns the number of modes added.
+ *
+ * This function is mandatory.
+ */
+ int (*get_modes)(struct drm_panel *panel,
+ struct drm_connector *connector);
+
+ /**
+ * @get_timings:
+ *
+ * Copy display timings into the provided array and return
+ * the number of display timings available.
+ *
+ * This function is optional.
+ */
int (*get_timings)(struct drm_panel *panel, unsigned int num_timings,
struct display_timing *timings);
};
/**
* struct drm_panel - DRM panel object
- * @drm: DRM device owning the panel
- * @connector: DRM connector that the panel is attached to
- * @dev: parent device of the panel
- * @funcs: operations that can be performed on the panel
- * @list: panel entry in registry
*/
struct drm_panel {
- struct drm_device *drm;
- struct drm_connector *connector;
+ /**
+ * @dev:
+ *
+ * Parent device of the panel.
+ */
struct device *dev;
- const struct drm_panel_funcs *funcs;
-
- struct list_head list;
+ /**
+ * @backlight:
+ *
+ * Backlight device, used to turn on backlight after the call
+ * to enable(), and to turn off backlight before the call to
+ * disable().
+ * backlight is set by drm_panel_of_backlight() and drivers
+ * shall not assign it.
+ */
+ struct backlight_device *backlight;
/**
- * @nh:
+ * @funcs:
*
- * panel notifier list head
+ * Operations that can be performed on the panel.
*/
- struct blocking_notifier_head nh;
+ const struct drm_panel_funcs *funcs;
+
+ /**
+ * @connector_type:
+ *
+ * Type of the panel as a DRM_MODE_CONNECTOR_* value. This is used to
+ * initialise the drm_connector corresponding to the panel with the
+ * correct connector type.
+ */
+ int connector_type;
+
+ /**
+ * @list:
+ *
+ * Panel entry in registry.
+ */
+ struct list_head list;
};
-static inline int drm_panel_loader_protect(struct drm_panel *panel, bool on)
-{
- if (panel && panel->funcs && panel->funcs->loader_protect)
- return panel->funcs->loader_protect(panel, on);
+void drm_panel_init(struct drm_panel *panel, struct device *dev,
+ const struct drm_panel_funcs *funcs,
+ int connector_type);
- return -EINVAL;
-}
-
-/**
- * drm_disable_unprepare - power off a panel
- * @panel: DRM panel
- *
- * Calling this function will completely power off a panel (assert the panel's
- * reset, turn off power supplies, ...). After this function has completed, it
- * is usually no longer possible to communicate with the panel until another
- * call to drm_panel_prepare().
- *
- * Return: 0 on success or a negative error code on failure.
- */
-static inline int drm_panel_unprepare(struct drm_panel *panel)
-{
- if (panel && panel->funcs && panel->funcs->unprepare)
- return panel->funcs->unprepare(panel);
-
- return panel ? -ENOSYS : -EINVAL;
-}
-
-/**
- * drm_panel_disable - disable a panel
- * @panel: DRM panel
- *
- * This will typically turn off the panel's backlight or disable the display
- * drivers. For smart panels it should still be possible to communicate with
- * the integrated circuitry via any command bus after this call.
- *
- * Return: 0 on success or a negative error code on failure.
- */
-static inline int drm_panel_disable(struct drm_panel *panel)
-{
- if (panel && panel->funcs && panel->funcs->disable)
- return panel->funcs->disable(panel);
-
- return panel ? -ENOSYS : -EINVAL;
-}
-
-/**
- * drm_panel_prepare - power on a panel
- * @panel: DRM panel
- *
- * Calling this function will enable power and deassert any reset signals to
- * the panel. After this has completed it is possible to communicate with any
- * integrated circuitry via a command bus.
- *
- * Return: 0 on success or a negative error code on failure.
- */
-static inline int drm_panel_prepare(struct drm_panel *panel)
-{
- if (panel && panel->funcs && panel->funcs->prepare)
- return panel->funcs->prepare(panel);
-
- return panel ? -ENOSYS : -EINVAL;
-}
-
-/**
- * drm_panel_enable - enable a panel
- * @panel: DRM panel
- *
- * Calling this function will cause the panel display drivers to be turned on
- * and the backlight to be enabled. Content will be visible on screen after
- * this call completes.
- *
- * Return: 0 on success or a negative error code on failure.
- */
-static inline int drm_panel_enable(struct drm_panel *panel)
-{
- if (panel && panel->funcs && panel->funcs->enable)
- return panel->funcs->enable(panel);
-
- return panel ? -ENOSYS : -EINVAL;
-}
-
-/**
- * drm_panel_get_modes - probe the available display modes of a panel
- * @panel: DRM panel
- *
- * The modes probed from the panel are automatically added to the connector
- * that the panel is attached to.
- *
- * Return: The number of modes available from the panel on success or a
- * negative error code on failure.
- */
-static inline int drm_panel_get_modes(struct drm_panel *panel)
-{
- if (panel && panel->funcs && panel->funcs->get_modes)
- return panel->funcs->get_modes(panel);
-
- return panel ? -ENOSYS : -EINVAL;
-}
-
-void drm_panel_init(struct drm_panel *panel);
-
-int drm_panel_add(struct drm_panel *panel);
+void drm_panel_add(struct drm_panel *panel);
void drm_panel_remove(struct drm_panel *panel);
-int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector);
-int drm_panel_detach(struct drm_panel *panel);
+int drm_panel_prepare(struct drm_panel *panel);
+int drm_panel_unprepare(struct drm_panel *panel);
-int drm_panel_notifier_register(struct drm_panel *panel,
- struct notifier_block *nb);
-int drm_panel_notifier_unregister(struct drm_panel *panel,
- struct notifier_block *nb);
-int drm_panel_notifier_call_chain(struct drm_panel *panel,
- unsigned long val, void *v);
+int drm_panel_enable(struct drm_panel *panel);
+int drm_panel_disable(struct drm_panel *panel);
+
+int drm_panel_get_modes(struct drm_panel *panel, struct drm_connector *connector);
#if defined(CONFIG_OF) && defined(CONFIG_DRM_PANEL)
struct drm_panel *of_drm_find_panel(const struct device_node *np);
+int of_drm_get_panel_orientation(const struct device_node *np,
+ enum drm_panel_orientation *orientation);
#else
static inline struct drm_panel *of_drm_find_panel(const struct device_node *np)
{
return ERR_PTR(-ENODEV);
}
+
+static inline int of_drm_get_panel_orientation(const struct device_node *np,
+ enum drm_panel_orientation *orientation)
+{
+ return -ENODEV;
+}
+#endif
+
+#if IS_ENABLED(CONFIG_DRM_PANEL) && (IS_BUILTIN(CONFIG_BACKLIGHT_CLASS_DEVICE) || \
+ (IS_MODULE(CONFIG_DRM) && IS_MODULE(CONFIG_BACKLIGHT_CLASS_DEVICE)))
+int drm_panel_of_backlight(struct drm_panel *panel);
+#else
+static inline int drm_panel_of_backlight(struct drm_panel *panel)
+{
+ return 0;
+}
#endif
#endif
--
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