Commit f08e7a4e authored by Nicolas Frattaroli's avatar Nicolas Frattaroli Committed by Ulf Hansson
Browse files

pmdomain: mediatek: Add support for MFlexGraphics 



Various MediaTek SoCs use GPU integration silicon named "MFlexGraphics"
by MediaTek. On the MT8196 and MT6991 SoCs, interacting with this
integration silicon is required to power on the GPU.

This glue silicon is in the form of an embedded microcontroller running
special-purpose firmware, which autonomously adjusts clocks and
regulators.

Implement a driver, modelled as a pmdomain driver with a
set_performance_state operation, to support these SoCs.

The driver also exposes the actual achieved clock rate, as read back
from the MCU, as common clock framework clocks, by acting as a clock
provider as well.

Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: default avatarNicolas Frattaroli <nicolas.frattaroli@collabora.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 19e668e8

drivers/pmdomain/mediatek/Kconfig

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@@ -26,6 +26,22 @@ config MTK_SCPSYS_PM_DOMAINS 
	  Control Processor System (SCPSYS) has several power management related

	  tasks in the system.



config MTK_MFG_PM_DOMAIN

	bool "MediaTek MFlexGraphics power domain"

	default ARCH_MEDIATEK

	depends on PM

	depends on OF

	depends on COMMON_CLK

	select PM_GENERIC_DOMAINS

	imply MTK_GPUEB_MBOX

	help

	  Say y or m here to enable the power domains driver for MediaTek

	  MFlexGraphics. This driver allows for power and frequency control of

	  GPUs on MediaTek SoCs such as the MT8196 or MT6991.



	  This driver is required for the Mali GPU to work at all on MT8196 and

	  MT6991.



config AIROHA_CPU_PM_DOMAIN

	tristate "Airoha CPU power domain"

	default ARCH_AIROHA

drivers/pmdomain/mediatek/Makefile

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# SPDX-License-Identifier: GPL-2.0-only

obj-$(CONFIG_MTK_MFG_PM_DOMAIN)		+= mtk-mfg-pmdomain.o

obj-$(CONFIG_MTK_SCPSYS)		+= mtk-scpsys.o

obj-$(CONFIG_MTK_SCPSYS_PM_DOMAINS) 	+= mtk-pm-domains.o

obj-$(CONFIG_AIROHA_CPU_PM_DOMAIN) 	+= airoha-cpu-pmdomain.o

drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c

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