disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/arm/bifrost/mali_kbase_config.h
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@@ -1,7 +1,7 @@
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 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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 /*
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  *
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- * (C) COPYRIGHT 2010-2017, 2019-2021 ARM Limited. All rights reserved.
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+ * (C) COPYRIGHT 2010-2017, 2019-2022 ARM Limited. All rights reserved.
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  *
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  * This program is free software and is provided to you under the terms of the
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  * GNU General Public License version 2 as published by the Free Software
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@@ -170,6 +170,12 @@
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 	 * the clocks to the GPU, or to completely power down the GPU.
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 	 * The platform specific private pointer kbase_device::platform_context can be accessed and modified in here. It is the
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 	 * platform \em callbacks responsibility to initialize and terminate this pointer if used (see @ref kbase_platform_funcs_conf).
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+	 *
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+	 * If runtime PM is enabled and @power_runtime_gpu_idle_callback is used
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+	 * then this callback should power off the GPU (or switch off the clocks
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+	 * to GPU) immediately. If @power_runtime_gpu_idle_callback is not used,
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+	 * then this callback can set the autosuspend timeout (if desired) and
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+	 * let the GPU be powered down later.
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 	 */
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 	void (*power_off_callback)(struct kbase_device *kbdev);
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@@ -240,8 +246,6 @@
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 	 *
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 	 * For linux this callback will be called by the kernel runtime_suspend callback.
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 	 * Note: for linux the kernel must have CONFIG_PM_RUNTIME enabled to use this feature.
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-	 *
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-	 * @return 0 on success, else OS error code.
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 	 */
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 	void (*power_runtime_off_callback)(struct kbase_device *kbdev);
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 	 *
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 	 * For linux this callback will be called by the kernel runtime_resume callback.
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 	 * Note: for linux the kernel must have CONFIG_PM_RUNTIME enabled to use this feature.
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+	 *
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+	 * @return 0 on success, else OS error code.
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 	 */
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 	int (*power_runtime_on_callback)(struct kbase_device *kbdev);
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@@ -289,6 +295,49 @@
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 	 * be raised. On error, return the corresponding OS error code.
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 	 */
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 	int (*soft_reset_callback)(struct kbase_device *kbdev);
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+
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+	/*
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+	 * Optional callback invoked after GPU becomes idle, not supported on
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+	 * JM GPUs.
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+	 *
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+	 * This callback will be invoked by the Kbase when GPU becomes idle.
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+	 * For JM GPUs or when runtime PM is disabled, Kbase will not invoke
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+	 * this callback and @power_off_callback will be invoked directly.
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+	 *
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+	 * This callback is supposed to decrement the runtime PM core reference
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+	 * count to zero and trigger the auto-suspend timer, which implies that
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+	 * @power_off_callback shouldn't initiate the runtime suspend.
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+	 *
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+	 * GPU registers still remain accessible until @power_off_callback gets
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+	 * invoked later on the expiry of auto-suspend timer.
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+	 *
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+	 * Note: The Linux kernel must have CONFIG_PM_RUNTIME enabled to use
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+	 * this feature.
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+	 */
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+	void (*power_runtime_gpu_idle_callback)(struct kbase_device *kbdev);
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+
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+	/*
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+	 * Optional callback invoked to change the runtime PM core state to
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+	 * active.
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+	 *
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+	 * This callback will be invoked by Kbase when GPU needs to be
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+	 * reactivated, but only if @power_runtime_gpu_idle_callback was invoked
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+	 * previously. So both @power_runtime_gpu_idle_callback and this
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+	 * callback needs to be implemented at the same time.
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+	 *
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+	 * Kbase will invoke @power_on_callback first before invoking this
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+	 * callback if the GPU was powered down previously, otherwise directly.
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+	 *
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+	 * This callback is supposed to increment the runtime PM core reference
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+	 * count to 1, which implies that @power_on_callback shouldn't initiate
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+	 * the runtime resume. The runtime resume may not happen synchronously
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+	 * to avoid a potential deadlock due to the runtime suspend happening
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+	 * simultaneously from some other thread.
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+	 *
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+	 * Note: The Linux kernel must have CONFIG_PM_RUNTIME enabled to use
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+	 * this feature.
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+	 */
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+	void (*power_runtime_gpu_active_callback)(struct kbase_device *kbdev);
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 };
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 /* struct kbase_gpu_clk_notifier_data - Data for clock rate change notifier.
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 /**
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  * kbase_get_platform_config - Gets the pointer to platform config.
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  *
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- * @return Pointer to the platform config
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+ * Return: Pointer to the platform config
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  */
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 struct kbase_platform_config *kbase_get_platform_config(void);
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 #ifndef CONFIG_OF
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 /**
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  * kbase_platform_register - Register a platform device for the GPU
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- *
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  * This can be used to register a platform device on systems where device tree
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  * is not enabled and the platform initialisation code in the kernel doesn't
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  * create the GPU device. Where possible device tree should be used instead.