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| author | Maulik Shah <quic_mkshah@quicinc.com> | 2024-02-15 10:55:44 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-16 13:41:33 +0200 |
| commit | 3988a2850b387b0417f98900ed98b407cdc156f8 (patch) | |
| tree | 954b8feec8607d0d9409873023b863070b44b4bc /include | |
| parent | 560d69c975072974c11434ca6953891e74c1a665 (diff) | |
| download | linux-3988a2850b387b0417f98900ed98b407cdc156f8.tar.gz linux-3988a2850b387b0417f98900ed98b407cdc156f8.tar.bz2 linux-3988a2850b387b0417f98900ed98b407cdc156f8.zip | |
soc: qcom: rpmh-rsc: Enhance check for VRM in-flight request
commit f592cc5794747b81e53b53dd6e80219ee25f0611 upstream.
Each RPMh VRM accelerator resource has 3 or 4 contiguous 4-byte aligned
addresses associated with it. These control voltage, enable state, mode,
and in legacy targets, voltage headroom. The current in-flight request
checking logic looks for exact address matches. Requests for different
addresses of the same RPMh resource as thus not detected as in-flight.
Add new cmd-db API cmd_db_match_resource_addr() to enhance the in-flight
request check for VRM requests by ignoring the address offset.
This ensures that only one request is allowed to be in-flight for a given
VRM resource. This is needed to avoid scenarios where request commands are
carried out by RPMh hardware out-of-order leading to LDO regulator
over-current protection triggering.
Fixes: 658628e7ef78 ("drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs")
Cc: stable@vger.kernel.org
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Elliot Berman <quic_eberman@quicinc.com> # sm8650-qrd
Signed-off-by: Maulik Shah <quic_mkshah@quicinc.com>
Link: https://lore.kernel.org/r/20240215-rpmh-rsc-fixes-v4-1-9cbddfcba05b@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/soc/qcom/cmd-db.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/soc/qcom/cmd-db.h b/include/soc/qcom/cmd-db.h index c8bb56e6852a..47a6cab75e63 100644 --- a/include/soc/qcom/cmd-db.h +++ b/include/soc/qcom/cmd-db.h @@ -1,5 +1,8 @@ /* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. */ +/* + * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved. + * Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved. + */ #ifndef __QCOM_COMMAND_DB_H__ #define __QCOM_COMMAND_DB_H__ @@ -21,6 +24,8 @@ u32 cmd_db_read_addr(const char *resource_id); const void *cmd_db_read_aux_data(const char *resource_id, size_t *len); +bool cmd_db_match_resource_addr(u32 addr1, u32 addr2); + enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id); int cmd_db_ready(void); @@ -31,6 +36,9 @@ static inline u32 cmd_db_read_addr(const char *resource_id) static inline const void *cmd_db_read_aux_data(const char *resource_id, size_t *len) { return ERR_PTR(-ENODEV); } +static inline bool cmd_db_match_resource_addr(u32 addr1, u32 addr2) +{ return false; } + static inline enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id) { return -ENODEV; } |