From: Nicolas Saenz Julienne <nsaenz@kernel.org>
To: linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org,
devicetree@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
Saenz Julienne <nsaenz@kernel.org>
Cc: f.fainelli@gmail.com, phil@raspberrypi.com,
tim.gover@raspberrypi.com, adrian.hunter@intel.com,
sbranden@broadcom.com, alcooperx@gmail.com,
nsaenzjulienne@suse.de, linux-kernel@vger.kernel.org,
ulf.hansson@linaro.org
Subject: [PATCH 0/4] BCM2711's sdhci-iproc CMD timeouts
Date: Mon, 22 Mar 2021 19:58:13 +0100 [thread overview]
Message-ID: <20210322185816.27582-1-nsaenz@kernel.org> (raw)
This series tries to address rather odd behavior from BCM2711's
integration of sdhci-iproc (Raspberry Pi 4's SoC). The controller will
timeout on SDHCI CMDs under the following conditions:
- No SD card plugged in (the card polling thread is running, CD irq disabled).
- BCM2711's VPU clock configured at 500MHz or more, lower clocks are OK.
There is no specific command that will time out, it seems random.
I found out that by bumping the controller's frequency to 150MHz the
issue disapears. So let's do that.
Regards,
Nicolas
---
Nicolas Saenz Julienne (4):
dt-bindings: mmc: iproc-sdhci: Convert to json-schema
dt-bindings: mmc: iproc-sdhci: Add clock-frequency support
mmc: sdhci-iproc: Set clock frequency as per DT
ARM: dts: Fix-up EMMC2 controller's frequency
.../bindings/mmc/brcm,iproc-sdhci.yaml | 64 +++++++++++++++++++
.../bindings/mmc/brcm,sdhci-iproc.txt | 37 -----------
arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 6 ++
drivers/mmc/host/sdhci-iproc.c | 10 +++
4 files changed, 80 insertions(+), 37 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mmc/brcm,iproc-sdhci.yaml
delete mode 100644 Documentation/devicetree/bindings/mmc/brcm,sdhci-iproc.txt
--
2.30.2
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next reply other threads:[~2021-03-22 19:01 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 18:58 Nicolas Saenz Julienne [this message]
2021-03-22 18:58 ` [PATCH 1/4] dt-bindings: mmc: iproc-sdhci: Convert to json-schema Nicolas Saenz Julienne
2021-03-22 19:11 ` Scott Branden
2021-03-22 19:16 ` Nicolas Saenz Julienne
2021-03-23 21:08 ` Rob Herring
2021-03-23 21:24 ` Nicolas Saenz Julienne
2021-03-24 16:27 ` Scott Branden
2021-03-24 16:35 ` Nicolas Saenz Julienne
2021-03-24 16:43 ` Scott Branden
2021-03-23 20:16 ` Rob Herring
2021-03-22 18:58 ` [PATCH 2/4] dt-bindings: mmc: iproc-sdhci: Add clock-frequency support Nicolas Saenz Julienne
2021-03-27 17:14 ` Rob Herring
2021-03-22 18:58 ` [PATCH 3/4] mmc: sdhci-iproc: Set clock frequency as per DT Nicolas Saenz Julienne
2021-03-22 18:58 ` [PATCH 4/4] ARM: dts: Fix-up EMMC2 controller's frequency Nicolas Saenz Julienne
2021-03-22 19:06 ` Scott Branden
2021-03-22 19:17 ` Nicolas Saenz Julienne
2021-03-24 15:16 ` Stefan Wahren
2021-03-24 15:34 ` Nicolas Saenz Julienne
2021-03-25 19:11 ` Stefan Wahren
2021-03-26 16:17 ` Nicolas Saenz Julienne
2021-03-26 16:42 ` Stefan Wahren
2021-04-01 15:23 ` Alan Cooper
2021-04-05 8:45 ` Nicolas Saenz Julienne
2021-04-07 20:37 ` Alan Cooper
2021-04-09 9:28 ` Nicolas Saenz Julienne
2021-04-09 10:54 ` Nicolas Saenz Julienne
2021-04-09 18:28 ` Stefan Wahren
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