linux-xiaomi-chiron/include/linux/platform_data
Suman Anna 3846a3b951 iommu/omap: fix boot issue on remoteprocs with AMMU/Unicache
Support has been added to the OMAP IOMMU driver to fix a boot hang
issue on OMAP remoteprocs with AMMU/Unicache, caused by an improper
AMMU/Unicache state upon initial deassertion of the processor reset.
The issue is described in detail in the next three paragraphs.

All the Cortex M3/M4 IPU processor subsystems in OMAP SoCs have a
AMMU/Unicache IP that dictates the memory attributes for addresses
seen by the processor cores. The AMMU/Unicache is configured/enabled
by the SCACHE_CONFIG.BYPASS bit - a value of 1 enables the cache and
mandates all addresses accessed by M3/M4 be defined in the AMMU. This
bit is not programmable from the host processor. The M3/M4 boot
sequence starts out with the AMMU/Unicache in disabled state, and
SYS/BIOS programs the AMMU regions and enables the Unicache during
one of its initial boot steps. This SCACHE_CONFIG.BYPASS bit is
however enabled by default whenever a RET reset is applied to the IP,
irrespective of whether it was previously enabled or not. The AMMU
registers lose their context whenever this reset is applied. The reset
is effective as long as the MMU portion of the subsystem is enabled
and clocked. This behavior is common to all the IPU and DSP subsystems
that have an AMMU/Unicache.

The IPU boot sequence involves enabling and programming the MMU, and
loading the processor and releasing the reset(s) for the processor.
The PM setup code currently sets the target state for most of the
power domains to RET. The L2 MMU can be enabled, programmed and
accessed properly just fine with the domain in hardware supervised
mode, while the power domain goes through a RET->ON->RET transition
during the programming sequence. However, the ON->RET transition
asserts a RET reset, and the SCACHE_CONFIG.BYPASS bit gets auto-set.
An AMMU fault is thrown immediately when the M3/M4 core's reset is
released since the first instruction address itself will not be
defined in any valid AMMU regions. The ON->RET transition happens
automatically on the power domain after enabling the iommu due to
the hardware supervised mode.

This patch adds and invokes the .set_pwrdm_constraint pdata ops, if
present, during the OMAP IOMMU enable and disable functions to resolve
the above boot hang issue. The ops will allow to invoke a mach-omap2
layer API pwrdm_set_next_pwrst() in a multi-arch kernel environment.
The ops also returns the current power domain state while enforcing
the constraint so that the driver can store it and use it to set back
the power domain state while releasing the constraint. The pdata ops
implementation restricts the target power domain to ON during enable,
and back to the original power domain state during disable, and thereby
eliminating the conditions for the boot issue. The implementation is
effective only when the original power domain state is either RET or
OFF, and is a no-op when it is ON or INACTIVE.

The .set_pwrdm_constraint ops need to be plugged in pdata-quirks
for the affected remote processors to be able to boot properly.

Note that the current issue is seen only on kernels with the affected
power domains programmed to enter RET. For eg., IPU1 on DRA7xx is in a
separate domain and is susceptible to this bug, while the IPU2 subsystem
is within CORE power domain, and CORE RET is not supported on this SoC.
IPUs on OMAP4 and OMAP5 are also susceptible since they are in CORE power
domain, and CORE RET is a valid power target on these SoCs.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-08-09 17:37:09 +02:00
..
gpio gpio: amd-fch: Fix bogus SPDX identifier 2019-03-22 16:48:47 +01:00
jz4740 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 151 2019-05-30 11:26:28 -07:00
media media updates for v5.3-rc1 2019-07-09 09:47:22 -07:00
txx9 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
x86 platform/x86: asus: Rename "fan mode" to "fan boost mode" 2019-07-17 19:07:58 +03:00
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b53.h net: dsa: Include platform_data header file 2019-01-17 11:31:24 -08:00
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brcmfmac.h
clk-da8xx-cfgchip.h clk: davinci: New driver for TI DA8XX CFGCHIP clocks 2018-03-20 10:16:26 -07:00
clk-davinci-pll.h clk: davinci: New driver for davinci PLL clocks 2018-03-20 10:16:26 -07:00
clk-integrator.h
clk-st.h clk: x86: Add ST oscout platform clock 2018-05-17 12:44:06 +02:00
clk-u300.h
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davinci-cpufreq.h cpufreq: davinci: move configuration to include/linux/platform_data 2019-02-18 11:58:08 +05:30
davinci_asp.h ASoC: davinci-mcasp: Implement configurable dismod handling 2018-11-28 12:41:31 +00:00
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dma-dw.h dmaengine: dw: convert to SPDX identifiers 2019-01-07 17:57:13 +05:30
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dma-imx-sdma.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-imx.h dmaengine updates for v5.3-rc1 2019-07-17 09:55:43 -07:00
dma-mcf-edma.h dmaengine: fsl-edma: add ColdFire mcf5441x edma support 2018-09-11 12:06:39 +05:30
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ds620.h docs: hwmon: Add an index file and rename docs to *.rst 2019-04-17 10:37:23 -07:00
dsa.h net: dsa: Split platform data to header file 2019-01-17 11:31:24 -08:00
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efm32-spi.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
efm32-uart.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
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gpio-davinci.h gpio: davinci: restore a way to manually specify the GPIO base 2018-11-26 16:45:10 +05:30
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gpio-htc-egpio.h gpio: htc-gpio: Include the right header 2018-03-19 01:50:28 +01:00
gpio-omap.h Bulk GPIO changes for the v5.3 kernel cycle: 2019-07-09 09:07:00 -07:00
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i2c-davinci.h i2c/ARM: davinci: Deep refactoring of I2C recovery 2017-12-31 00:09:39 +01:00
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i2c-hid.h HID: i2c-hid: Add vddl regulator control 2018-06-25 15:12:42 +02:00
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i2c-mux-gpio.h Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-07-15 21:10:39 -07:00
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i2c-ocores.h i2c: ocores: Add support for bus clock via platform data 2019-02-14 17:58:23 +01:00
i2c-omap.h i2c: omap: move header to platform_data 2018-05-17 16:27:58 +02:00
i2c-pca-platform.h i2c: pca-platform: move header to platform_data 2018-05-17 16:27:58 +02:00
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iommu-omap.h iommu/omap: fix boot issue on remoteprocs with AMMU/Unicache 2019-08-09 17:37:09 +02:00
irda-pxaficp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
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keyboard-pxa930_rotary.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
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mmc-s3cmci.h mmc: s3cmci: Use the slot GPIO descriptor 2018-12-17 08:26:24 +01:00
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pixcir_i2c_ts.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pm33xx.h ARM: OMAP2+: pm33xx: Add support for rtc+ddr in self refresh mode 2019-04-08 10:39:01 -07:00
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rtc-ds2404.h
rtc-v3020.h
s3c-hsotg.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
s3c-hsudc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sa11x0-serial.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sc18is602.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sdhci-pic32.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 2019-06-05 17:37:18 +02:00
serial-imx.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
serial-omap.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
serial-sccnxp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
shmob_drm.h drm: shmobile: convert to SPDX identifiers 2018-09-14 13:54:02 +03:00
sht3x.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
shtc1.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
si5351.h clk: si5351: Add DT property to enable PLL reset 2017-12-21 18:09:18 -08:00
simplefb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sky81452-backlight.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
spi-ath79.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
spi-clps711x.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
spi-davinci.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
spi-ep93xx.h spi: ep93xx: Convert to use CS GPIO descriptors 2019-05-02 10:37:59 +09:00
spi-imx.h ARM: imx: Update spi_imx platform data to reflect current state 2018-04-18 11:11:23 +08:00
spi-mt65xx.h Merge branch 'spi-5.3' into spi-next 2019-07-04 17:35:07 +01:00
spi-nuc900.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
spi-omap2-mcspi.h ARM: OMAP2+: Cleanup omap2_spi_dev_attr and other legacy data 2018-02-14 10:28:12 -08:00
spi-s3c64xx.h spi: s3c64xx: add SPDX identifier 2018-01-08 15:38:06 +00:00
ssm2518.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 177 2019-05-30 11:29:19 -07:00
st33zp24.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
st_sensors_pdata.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 177 2019-05-30 11:29:19 -07:00
syscon.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tc35876x.h
tda9950.h drm/i2c: tda9950: add CEC driver 2018-04-24 10:44:25 +01:00
ti-aemif.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ti-sysc.h bus: ti-sysc: Add support for module specific reset quirks 2019-06-10 04:52:22 -07:00
timer-ixp4xx.h clocksource/drivers/ixp4xx: Add driver 2019-04-23 16:02:13 +02:00
touchscreen-s3c2410.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tsc2007.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsl2563.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsl2772.h staging: iio: tsl2x7x/tsl2772: move out of staging 2018-05-12 12:40:04 +01:00
uio_dmem_genirq.h
uio_pruss.h
usb-davinci.h usb: ohci-da8xx: remove unused callbacks from platform data 2019-02-12 13:48:59 +05:30
usb-ehci-mxc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usb-ehci-orion.h
usb-musb-ux500.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
usb-mx2.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
usb-ohci-pxa27x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usb-ohci-s3c2410.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
usb-omap.h
usb-omap1.h
usb-pxa3xx-ulpi.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
usb-s3c2410_udc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
usb3503.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ux500_wdt.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 197 2019-05-30 11:29:22 -07:00
video-ep93xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
video-imxfb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
video-mx3fb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
video-nuc900fb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
video-pxafb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
video_s3c.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
voltage-omap.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
wilco-ec.h platform/chrome: wilco_ec: Add telemetry char device interface 2019-06-05 10:14:50 +02:00
wiznet.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
wkup_m3.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
xilinx-ll-temac.h net: ll_temac: Prepare indirect register access for multicast support 2019-05-23 09:33:57 -07:00
xtalk-bridge.h MIPS: SGI-IP27: use generic PCI driver 2019-05-09 16:39:27 -07:00
zforce_ts.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00