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4582d25a66
Added missing platform data struct for RK3576 to fix boot issues, fixed general stability issues and also improved random write performance. Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org> Link: https://github.com/openwrt/openwrt/pull/21028 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
43 lines
1.6 KiB
Diff
43 lines
1.6 KiB
Diff
From c7ce6453b769c45006ed4983762f81e130878171 Mon Sep 17 00:00:00 2001
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From: Shawn Lin <shawn.lin@rock-chips.com>
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Date: Wed, 26 Nov 2025 07:26:39 +0800
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Subject: [PATCH] mmc: sdhci-of-dwcmshc: Disable internal clock auto gate for
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Rockchip SOCs
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Enabling CMDQ support can lead to random occurrences of the error log when
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there are RPMB access and data flush executed:
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"mmc2: Timeout waiting for hardware interrupt."
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Enabling CMDQ and then issuing a DCMD as the final command before disabling
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it causes the eMMC controller to auto-gate its internal clock. Chip simulation
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shows this results in a state machine mismatch after CMDQ mode exit, triggering
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data-timeout errors for all subsequent read and write operations.
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Therefore, the auto-clock-gate function must be disabled whenever CMDQ is
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enabled.
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Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
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Acked-by: Adrian Hunter <adrian.hunter@intel.com>
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Fixes: fda1e0af7c28 ("mmc: sdhci-of-dwcmshc: Add command queue support for rockchip SOCs")
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Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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---
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drivers/mmc/host/sdhci-of-dwcmshc.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
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+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
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@@ -696,10 +696,11 @@ static void dwcmshc_rk3568_set_clock(str
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sdhci_set_clock(host, clock);
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- /* Disable cmd conflict check */
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+ /* Disable cmd conflict check and internal clock gate */
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reg = dwc_priv->vendor_specific_area1 + DWCMSHC_HOST_CTRL3;
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extra = sdhci_readl(host, reg);
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extra &= ~BIT(0);
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+ extra |= BIT(4);
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sdhci_writel(host, extra, reg);
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if (clock <= 52000000) {
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