8f9e91ad03
These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From 87d96e0b65fc81f4c24eb3cc80ebf92eb99c8578 Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.com>
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Date: Fri, 22 Mar 2024 14:22:55 +0000
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Subject: [PATCH] drivers: sdhci-brcmstb: work around mystery CQE
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CMD_IDLE_TIMER trampling
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For unknown reasons the controller seems to reset the idle polling timer
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interval on CQE enable/disable to 8 clocks which is extremely short.
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Just use the reset value in the eMMC spec (4096 clock periods which at
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200MHz is ~20uS).
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Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
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---
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drivers/mmc/host/sdhci-brcmstb.c | 4 ++++
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1 file changed, 4 insertions(+)
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--- a/drivers/mmc/host/sdhci-brcmstb.c
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+++ b/drivers/mmc/host/sdhci-brcmstb.c
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@@ -385,6 +385,7 @@ static void sdhci_brcmstb_dumpregs(struc
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static void sdhci_brcmstb_cqe_enable(struct mmc_host *mmc)
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{
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struct sdhci_host *host = mmc_priv(mmc);
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+ struct cqhci_host *cq_host = mmc->cqe_private;
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u32 reg;
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reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
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@@ -394,6 +395,9 @@ static void sdhci_brcmstb_cqe_enable(str
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}
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sdhci_cqe_enable(mmc);
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+
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+ /* Reset CMD13 polling timer back to eMMC specification default */
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+ cqhci_writel(cq_host, 0x00011000, CQHCI_SSC1);
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}
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static const struct cqhci_host_ops sdhci_brcmstb_cqhci_ops = {
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