ac627caf6b
[Why] When querying HPD via GPIO flow, it will create a new gpio object then free in the end of query. There is a irql issue for HPD querying at ISR level. [How] Therefore, creating the HPD gpio object in dc_link and set it as unlcok in default. 1. reducing unnecessary malloc/free when HPD querying. 2. reducing init GPIO flow. 3. add lock/unlock to prevent multi gpio service running. Signed-off-by: Chiawen Huang <chiawen.huang@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* Copyright 2012-15 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#ifndef __DAL_GPIO_SERVICE_H__
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#define __DAL_GPIO_SERVICE_H__
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struct hw_translate;
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struct hw_factory;
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struct gpio_service {
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struct dc_context *ctx;
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struct hw_translate translate;
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struct hw_factory factory;
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/*
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* @brief
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* Business storage.
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* one byte For each member of 'enum gpio_id'
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*/
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char *busyness[GPIO_ID_COUNT];
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};
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enum gpio_result dal_gpio_service_open(
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struct gpio_service *service,
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enum gpio_id id,
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uint32_t en,
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enum gpio_mode mode,
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struct hw_gpio_pin **ptr);
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void dal_gpio_service_close(
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struct gpio_service *service,
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struct hw_gpio_pin **ptr);
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enum gpio_result dal_gpio_service_lock(
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struct gpio_service *service,
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enum gpio_id id,
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uint32_t en);
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enum gpio_result dal_gpio_service_unlock(
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struct gpio_service *service,
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enum gpio_id id,
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uint32_t en);
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#endif
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