From: Hans Verkuil <hverkuil@xs4all.nl> To: Maling list - DRI developers <dri-devel@lists.freedesktop.org>, Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Linux Media Mailing List <linux-media@vger.kernel.org> Subject: [PATCH] omapdrm/dss/hdmi4_cec.c: simplify clear_tx/rx_fifo functions Date: Mon, 8 Oct 2018 15:56:49 +0200 [thread overview] Message-ID: <3bc5d91c-89ce-1885-7b56-7e6047c7ff8b@xs4all.nl> (raw) Use REG_GET to avoid the temp variable. Add pr_err_once if hdmi_cec_clear_tx_fifo() fails in hdmi4_cec_irq(). Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> --- Note: the FIFOs are cleared almost immediately (after just one try), so adding delays is overkill. --- diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c b/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c index 00407f1995a8..92b55780aafd 100644 --- a/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c +++ b/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c @@ -110,16 +110,12 @@ static bool hdmi_cec_clear_tx_fifo(struct cec_adapter *adap) { struct hdmi_core_data *core = cec_get_drvdata(adap); int retry = HDMI_CORE_CEC_RETRY; - int temp; REG_FLD_MOD(core->base, HDMI_CEC_DBG_3, 0x1, 7, 7); - while (retry) { - temp = hdmi_read_reg(core->base, HDMI_CEC_DBG_3); - if (FLD_GET(temp, 7, 7) == 0) - break; - retry--; - } - return retry != 0; + while (retry--) + if (!REG_GET(core->base, HDMI_CEC_DBG_3, 7, 7)) + return true; + return false; } void hdmi4_cec_irq(struct hdmi_core_data *core) @@ -136,7 +132,9 @@ void hdmi4_cec_irq(struct hdmi_core_data *core) } else if (stat1 & 0x02) { u32 dbg3 = hdmi_read_reg(core->base, HDMI_CEC_DBG_3); - hdmi_cec_clear_tx_fifo(core->adap); + if (!hdmi_cec_clear_tx_fifo(core->adap)) + pr_err_once("cec-%s: could not clear TX FIFO\n", + core->adap->name); cec_transmit_done(core->adap, CEC_TX_STATUS_NACK | CEC_TX_STATUS_MAX_RETRIES, @@ -150,17 +148,12 @@ static bool hdmi_cec_clear_rx_fifo(struct cec_adapter *adap) { struct hdmi_core_data *core = cec_get_drvdata(adap); int retry = HDMI_CORE_CEC_RETRY; - int temp; hdmi_write_reg(core->base, HDMI_CEC_RX_CONTROL, 0x3); - retry = HDMI_CORE_CEC_RETRY; - while (retry) { - temp = hdmi_read_reg(core->base, HDMI_CEC_RX_CONTROL); - if (FLD_GET(temp, 1, 0) == 0) - break; - retry--; - } - return retry != 0; + while (retry--) + if (!REG_GET(core->base, HDMI_CEC_RX_CONTROL, 1, 0)) + return true; + return false; } static int hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
WARNING: multiple messages have this Message-ID (diff)
From: Hans Verkuil <hverkuil@xs4all.nl> To: Maling list - DRI developers <dri-devel@lists.freedesktop.org>, Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Linux Media Mailing List <linux-media@vger.kernel.org> Subject: [PATCH] omapdrm/dss/hdmi4_cec.c: simplify clear_tx/rx_fifo functions Date: Mon, 8 Oct 2018 15:56:49 +0200 [thread overview] Message-ID: <3bc5d91c-89ce-1885-7b56-7e6047c7ff8b@xs4all.nl> (raw) Use REG_GET to avoid the temp variable. Add pr_err_once if hdmi_cec_clear_tx_fifo() fails in hdmi4_cec_irq(). Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> --- Note: the FIFOs are cleared almost immediately (after just one try), so adding delays is overkill. --- diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c b/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c index 00407f1995a8..92b55780aafd 100644 --- a/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c +++ b/drivers/gpu/drm/omapdrm/dss/hdmi4_cec.c @@ -110,16 +110,12 @@ static bool hdmi_cec_clear_tx_fifo(struct cec_adapter *adap) { struct hdmi_core_data *core = cec_get_drvdata(adap); int retry = HDMI_CORE_CEC_RETRY; - int temp; REG_FLD_MOD(core->base, HDMI_CEC_DBG_3, 0x1, 7, 7); - while (retry) { - temp = hdmi_read_reg(core->base, HDMI_CEC_DBG_3); - if (FLD_GET(temp, 7, 7) == 0) - break; - retry--; - } - return retry != 0; + while (retry--) + if (!REG_GET(core->base, HDMI_CEC_DBG_3, 7, 7)) + return true; + return false; } void hdmi4_cec_irq(struct hdmi_core_data *core) @@ -136,7 +132,9 @@ void hdmi4_cec_irq(struct hdmi_core_data *core) } else if (stat1 & 0x02) { u32 dbg3 = hdmi_read_reg(core->base, HDMI_CEC_DBG_3); - hdmi_cec_clear_tx_fifo(core->adap); + if (!hdmi_cec_clear_tx_fifo(core->adap)) + pr_err_once("cec-%s: could not clear TX FIFO\n", + core->adap->name); cec_transmit_done(core->adap, CEC_TX_STATUS_NACK | CEC_TX_STATUS_MAX_RETRIES, @@ -150,17 +148,12 @@ static bool hdmi_cec_clear_rx_fifo(struct cec_adapter *adap) { struct hdmi_core_data *core = cec_get_drvdata(adap); int retry = HDMI_CORE_CEC_RETRY; - int temp; hdmi_write_reg(core->base, HDMI_CEC_RX_CONTROL, 0x3); - retry = HDMI_CORE_CEC_RETRY; - while (retry) { - temp = hdmi_read_reg(core->base, HDMI_CEC_RX_CONTROL); - if (FLD_GET(temp, 1, 0) == 0) - break; - retry--; - } - return retry != 0; + while (retry--) + if (!REG_GET(core->base, HDMI_CEC_RX_CONTROL, 1, 0)) + return true; + return false; } static int hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable) _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next reply other threads:[~2018-10-08 21:08 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-10-08 13:56 Hans Verkuil [this message] 2018-10-08 13:56 ` [PATCH] omapdrm/dss/hdmi4_cec.c: simplify clear_tx/rx_fifo functions Hans Verkuil
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