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[2001:b400:e25d:e1ee:eb42:adf3:9163:f337]) by smtp.gmail.com with ESMTPSA id v13-20020a63f20d000000b0050f85ef50d1sm1078725pgh.26.2023.11.07.01.57.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Nov 2023 01:57:52 -0800 (PST) From: Victor Shih To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, SeanHY.Chen.tu@genesyslogic.com.tw, kai.heng.feng@canonical.com, Victor Shih , Victor Shih , Kai-Heng Feng Subject: [PATCH V3 1/2] mmc: sdhci-pci-gli: GL9750: Mask the replay timer timeout of AER Date: Tue, 7 Nov 2023 17:57:40 +0800 Message-Id: <20231107095741.8832-2-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231107095741.8832-1-victorshihgli@gmail.com> References: <20231107095741.8832-1-victorshihgli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Victor Shih Due to a flaw in the hardware design, the GL9750 replay timer frequently times out when ASPM is enabled. As a result, the warning messages will often appear in the system log when the system accesses the GL9750 PCI config. Therefore, the replay timer timeout must be masked. Fixes: d7133797e9e1 ("mmc: sdhci-pci-gli: A workaround to allow GL9750 to enter ASPM L1.2") Signed-off-by: Victor Shih Acked-by: Adrian Hunter Acked-by: Kai-Heng Feng --- drivers/mmc/host/sdhci-pci-gli.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index d83261e857a5..3887bfd7386b 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -28,6 +28,9 @@ #define PCI_GLI_9750_PM_CTRL 0xFC #define PCI_GLI_9750_PM_STATE GENMASK(1, 0) +#define PCI_GLI_9750_CORRERR_MASK 0x214 +#define PCI_GLI_9750_CORRERR_MASK_REPLAY_TIMER_TIMEOUT BIT(12) + #define SDHCI_GLI_9750_CFG2 0x848 #define SDHCI_GLI_9750_CFG2_L1DLY GENMASK(28, 24) #define GLI_9750_CFG2_L1DLY_VALUE 0x1F @@ -561,6 +564,11 @@ static void gl9750_hw_setting(struct sdhci_host *host) value &= ~PCI_GLI_9750_PM_STATE; pci_write_config_dword(pdev, PCI_GLI_9750_PM_CTRL, value); + /* mask the replay timer timeout of AER */ + pci_read_config_dword(pdev, PCI_GLI_9750_CORRERR_MASK, &value); + value |= PCI_GLI_9750_CORRERR_MASK_REPLAY_TIMER_TIMEOUT; + pci_write_config_dword(pdev, PCI_GLI_9750_CORRERR_MASK, value); + gl9750_wt_off(host); }