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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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             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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