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AJvYcCWh93xkFWAFZf1ShOeiqire5/WPrkaT8kfRLd4tBPae6JBfJyEgmV3XoHOXj8/pQC1mizDXkFmbnQzOj/0tUfpfZussW9P5FqajgHXJ X-Gm-Message-State: AOJu0YxGlksxGCLfBvWAtKz5/VA99KO2FsVTE2ZYOfuPU1mHROOgxV3w nR3+MA69oilvY/Mg5y+j09YBXy4/9ux1ilY65H+wjbMeyWoM5XPA2Nq223BCuw== X-Google-Smtp-Source: AGHT+IFkIwPtOoypvgPqLNqXAQBGQokER/5fhFdY+L+D7rn8exKZ8pBPYZy4Fs9smBGqvwO1LGphxQ== X-Received: by 2002:a17:903:41ce:b0:1f6:7ee8:8935 with SMTP id d9443c01a7336-1f67ee88adfmr68395605ad.59.1717516915589; Tue, 04 Jun 2024 09:01:55 -0700 (PDT) Received: from dianders.sjc.corp.google.com ([2620:15c:9d:2:3609:ff79:4625:8a71]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f632358519sm86118385ad.82.2024.06.04.09.01.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Jun 2024 09:01:54 -0700 (PDT) From: Douglas Anderson To: Greg Kroah-Hartman , Jiri Slaby Cc: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Andy Shevchenko , linux-arm-msm@vger.kernel.org, Konrad Dybcio , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, John Ogness , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Yicong Yang , Tony Lindgren , Stephen Boyd , Johan Hovold , Bjorn Andersson , Douglas Anderson , Vijaya Krishna Nivarthi Subject: [PATCH v3 5/7] serial: qcom-geni: Just set the watermark level once Date: Tue, 4 Jun 2024 09:00:31 -0700 Message-ID: <20240604090028.v3.5.Ie02dcdf46089457026de3bd665c08f0210711966@changeid> X-Mailer: git-send-email 2.45.1.288.g0e0cd299f1-goog In-Reply-To: <20240604160123.2029413-1-dianders@chromium.org> References: <20240604160123.2029413-1-dianders@chromium.org> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 There's no reason to set the TX watermark level to 0 when we disable TX since we're disabling the interrupt anyway. Just set the watermark level once at init time and leave it alone. Signed-off-by: Douglas Anderson --- (no changes since v2) Changes in v2: - New drivers/tty/serial/qcom_geni_serial.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index c4c54359d32d..4dbc59873b34 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -392,7 +392,6 @@ static int qcom_geni_serial_get_char(struct uart_port *uport) static void qcom_geni_serial_poll_put_char(struct uart_port *uport, unsigned char c) { - writel(DEF_TX_WM, uport->membase + SE_GENI_TX_WATERMARK_REG); qcom_geni_serial_setup_tx(uport, 1); WARN_ON(!qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS, M_TX_FIFO_WATERMARK_EN, true)); @@ -436,7 +435,6 @@ __qcom_geni_serial_console_write(struct uart_port *uport, const char *s, bytes_to_send++; } - writel(DEF_TX_WM, uport->membase + SE_GENI_TX_WATERMARK_REG); qcom_geni_serial_setup_tx(uport, bytes_to_send); for (i = 0; i < count; ) { size_t chars_to_write = 0; @@ -664,7 +662,6 @@ static void qcom_geni_serial_start_tx_fifo(struct uart_port *uport) irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); irq_en |= M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN; - writel(DEF_TX_WM, uport->membase + SE_GENI_TX_WATERMARK_REG); writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } @@ -675,7 +672,6 @@ static void qcom_geni_serial_stop_tx_fifo(struct uart_port *uport) irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); irq_en &= ~(M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN); - writel(0, uport->membase + SE_GENI_TX_WATERMARK_REG); writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); /* Possible stop tx is called multiple times. */ if (!qcom_geni_serial_main_active(uport)) @@ -1127,6 +1123,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport) false, true, true); geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2); geni_se_select_mode(&port->se, port->dev_data->mode); + writel(DEF_TX_WM, uport->membase + SE_GENI_TX_WATERMARK_REG); qcom_geni_serial_start_rx(uport); port->setup = true;