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([193.176.212.206]) by smtp.gmail.com with ESMTPSA id d25-20020a196b19000000b005131544fc6fsm1641379lfa.291.2024.04.02.02.36.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Apr 2024 02:36:01 -0700 (PDT) From: Maksim Kiselev To: Cc: Maksim Kiselev , Drew Fustini , Xi Ruoyao , Adrian Hunter , Ulf Hansson , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1] mmc: sdhci-of-dwcmshc: th1520: Increase tuning loop count to 128 Date: Tue, 2 Apr 2024 12:35:39 +0300 Message-Id: <20240402093539.184287-1-bigunclemax@gmail.com> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Fix SD card tuning error by increasing tuning loop count from 40(MAX_TUNING_LOOP) to 128. For some reason the tuning algorithm requires to move through all the taps of delay line even if the THRESHOLD_MODE (bit 2 in AT_CTRL_R) is used instead of the LARGEST_WIN_MODE. Tested-by: Drew Fustini Tested-by: Xi Ruoyao Signed-off-by: Maksim Kiselev --- Previous discussion was here: https://lore.kernel.org/lkml/CALHCpMhc1F5Ue7U_gsDXREHUZRVQJNYRCJxYxoNqbN=-39jf7A@mail.gmail.com/ drivers/mmc/host/sdhci-of-dwcmshc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c index 8d6cfb648096..1001b6ea1a89 100644 --- a/drivers/mmc/host/sdhci-of-dwcmshc.c +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -706,6 +706,7 @@ static int th1520_execute_tuning(struct sdhci_host *host, u32 opcode) /* perform tuning */ sdhci_start_tuning(host); + host->tuning_loop_count = 128; host->tuning_err = __sdhci_execute_tuning(host, opcode); if (host->tuning_err) { /* disable auto-tuning upon tuning error */