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e949f61461
The s5p-cec driver returned CEC_TX_STATUS_ERROR for the NACK condition. Some digging into the datasheet uncovered the S5P_CEC_TX_STAT1 register where bit 0 indicates if the transmit was nacked or not. Use this to return the correct CEC_TX_STATUS_NACK status to userspace. This was the only driver that couldn't tell a NACK from another error, and that was very unusual. And a potential problem for applications as well. Tested with my Odroid-U3. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: <stable@vger.kernel.org> # for v4.12 and up Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/* drivers/media/platform/s5p-cec/s5p_cec.h
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*
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* Samsung S5P HDMI CEC driver
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*
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* Copyright (c) 2014 Samsung Electronics Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef _S5P_CEC_H_
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#define _S5P_CEC_H_ __FILE__
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#include <linux/clk.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include <media/cec.h>
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#include "exynos_hdmi_cec.h"
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#include "regs-cec.h"
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#include "s5p_cec.h"
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#define CEC_NAME "s5p-cec"
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#define CEC_STATUS_TX_RUNNING (1 << 0)
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#define CEC_STATUS_TX_TRANSFERRING (1 << 1)
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#define CEC_STATUS_TX_DONE (1 << 2)
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#define CEC_STATUS_TX_ERROR (1 << 3)
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#define CEC_STATUS_TX_NACK (1 << 4)
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#define CEC_STATUS_TX_BYTES (0xFF << 8)
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#define CEC_STATUS_RX_RUNNING (1 << 16)
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#define CEC_STATUS_RX_RECEIVING (1 << 17)
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#define CEC_STATUS_RX_DONE (1 << 18)
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#define CEC_STATUS_RX_ERROR (1 << 19)
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#define CEC_STATUS_RX_BCAST (1 << 20)
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#define CEC_STATUS_RX_BYTES (0xFF << 24)
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#define CEC_WORKER_TX_DONE (1 << 0)
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#define CEC_WORKER_RX_MSG (1 << 1)
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/* CEC Rx buffer size */
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#define CEC_RX_BUFF_SIZE 16
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/* CEC Tx buffer size */
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#define CEC_TX_BUFF_SIZE 16
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enum cec_state {
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STATE_IDLE,
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STATE_BUSY,
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STATE_DONE,
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STATE_NACK,
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STATE_ERROR
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};
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struct cec_notifier;
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struct s5p_cec_dev {
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struct cec_adapter *adap;
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struct clk *clk;
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struct device *dev;
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struct mutex lock;
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struct regmap *pmu;
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struct cec_notifier *notifier;
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int irq;
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void __iomem *reg;
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enum cec_state rx;
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enum cec_state tx;
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struct cec_msg msg;
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};
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#endif /* _S5P_CEC_H_ */
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