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Merge changes from topic "ADD_DELAY_IN_POLLING_SCMI" into integration

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* changes:
  fix(scmi): induce a delay in monitoring SCMI channel status
  feat(css): initialise generic timer early in the boot
This commit is contained in:
Manish Pandey 2024-02-08 16:02:56 +01:00 • committed by TrustedFirmware Code Review
commit 771a07156f
4 changed files with 16 additions and 7 deletions
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9
drivers/arm/css/scmi/scmi_common.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2017-2024, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -9,6 +9,7 @@
#include <arch_helpers.h>
#include <common/debug.h>
#include <drivers/arm/css/scmi.h>
#include <drivers/delay_timer.h>
#include "scmi_private.h"
@ -60,8 +61,10 @@ void scmi_send_sync_command(scmi_channel_t *ch)
dmbsy();
/* Wait for channel to be free */
while (!SCMI_IS_CHANNEL_FREE(mbx_mem->status))
;
while (!SCMI_IS_CHANNEL_FREE(mbx_mem->status)) {
if (ch->info->delay != 0)
udelay(ch->info->delay);
}
/*
* Ensure that any read to the SCMI payload area is done after reading

4
include/drivers/arm/css/scmi.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2017-2021, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2017-2024, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -123,6 +123,8 @@ typedef struct scmi_channel_plat_info {
void (*ring_doorbell)(struct scmi_channel_plat_info *plat_info);
/* cookie is unused now. But added for future enhancements. */
void *cookie;
/* Delay in micro-seconds while polling the channel status. */
uint32_t delay;
} scmi_channel_plat_info_t;

5
plat/arm/css/sgi/sgi-common.mk
View file

@ -1,5 +1,5 @@
#
# Copyright (c) 2018-2022, Arm Limited and Contributors. All rights reserved.
# Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@ -50,7 +50,8 @@ BL2_SOURCES += ${CSS_ENT_BASE}/sgi_image_load.c \
BL31_SOURCES += ${INTERCONNECT_SOURCES} \
${ENT_GIC_SOURCES} \
${CSS_ENT_BASE}/sgi_bl31_setup.c \
${CSS_ENT_BASE}/sgi_topology.c
${CSS_ENT_BASE}/sgi_topology.c \
drivers/delay_timer/generic_delay_timer.c
ifneq (${RESET_TO_BL31},0)
$(error "Using BL31 as the reset vector is not supported on ${PLAT} platform. \

5
plat/arm/css/sgi/sgi_bl31_setup.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2023, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -12,6 +12,7 @@
#include <common/debug.h>
#include <drivers/arm/css/css_mhu_doorbell.h>
#include <drivers/arm/css/scmi.h>
#include <drivers/generic_delay_timer.h>
#include <plat/arm/common/plat_arm.h>
#include <plat/common/platform.h>
@ -104,6 +105,8 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
void sgi_bl31_common_platform_setup(void)
{
generic_delay_timer_init();
arm_bl31_platform_setup();
/* Configure the warm reboot SGI for primary core */