xref: /device/soc/rockchip/rk3588/kernel/include/media/tc35874x.h (revision 3d0407ba)

/*
 * tc35874x - Toshiba HDMI to CSI-2 bridge
 *
 * Copyright 2015 Cisco Systems, Inc. and/or its affiliates. All rights
 * reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

/*
 * References (c = chapter, p = page):
 * REF_01 - Toshiba, TC358743XBG (H2C), Functional Specification, Rev 0.60
 * REF_02 - Toshiba, TC358743XBG_HDMI-CSI_Tv11p_nm.xls
 * REF_03 - Toshiba, TC358749XBG (H2C+), Functional Specification, Rev 0.74
 */

#ifndef _TC35874X_
#define _TC35874X_

enum tc35874x_ddc5v_delays {
	DDC5V_DELAY_0_MS,
	DDC5V_DELAY_50_MS,
	DDC5V_DELAY_100_MS,
	DDC5V_DELAY_200_MS,
};

enum tc35874x_hdmi_detection_delay {
	HDMI_MODE_DELAY_0_MS,
	HDMI_MODE_DELAY_25_MS,
	HDMI_MODE_DELAY_50_MS,
	HDMI_MODE_DELAY_100_MS,
};

struct tc35874x_platform_data {
	/* System clock connected to REFCLK (pin H5) */
	u32 refclk_hz; /* 26 MHz, 27 MHz or 42 MHz */

	/* DDC +5V debounce delay to avoid spurious interrupts when the cable
	 * is connected.
	 * Sets DDC5V_MODE in register DDC_CTL.
	 * Default: DDC5V_DELAY_0_MS
	 */
	enum tc35874x_ddc5v_delays ddc5v_delay;

	bool enable_hdcp;

	/*
	 * The FIFO size is 512x32, so Toshiba recommend to set the default FIFO
	 * level to somewhere in the middle (e.g. 300), so it can cover speed
	 * mismatches in input and output ports.
	 */
	u16 fifo_level;

	/* Bps pr lane is (refclk_hz / pll_prd) * pll_fbd */
	u16 pll_prd;
	u16 pll_fbd;

	/* CSI
	 * Calculate CSI parameters with REF_02 for the highest resolution your
	 * CSI interface can handle. The driver will adjust the number of CSI
	 * lanes in use according to the pixel clock.
	 *
	 * The values in brackets are calculated with REF_02 when the number of
	 * bps pr lane is 823.5 MHz, and can serve as a starting point.
	 */
	u32 lineinitcnt;	/* (0x00001770) */
	u32 lptxtimecnt;	/* (0x00000005) */
	u32 tclk_headercnt;	/* (0x00001d04) */
	u32 tclk_trailcnt;	/* (0x00000000) */
	u32 ths_headercnt;	/* (0x00000505) */
	u32 twakeup;		/* (0x00004650) */
	u32 tclk_postcnt;	/* (0x00000000) */
	u32 ths_trailcnt;	/* (0x00000004) */
	u32 hstxvregcnt;	/* (0x00000005) */

	/* DVI->HDMI detection delay to avoid unnecessary switching between DVI
	 * and HDMI mode.
	 * Sets HDMI_DET_V in register HDMI_DET.
	 * Default: HDMI_MODE_DELAY_0_MS
	 */
	enum tc35874x_hdmi_detection_delay hdmi_detection_delay;

	/* Reset PHY automatically when TMDS clock goes from DC to AC.
	 * Sets PHY_AUTO_RST2 in register PHY_CTL2.
	 * Default: false
	 */
	bool hdmi_phy_auto_reset_tmds_detected;

	/* Reset PHY automatically when TMDS clock passes 21 MHz.
	 * Sets PHY_AUTO_RST3 in register PHY_CTL2.
	 * Default: false
	 */
	bool hdmi_phy_auto_reset_tmds_in_range;

	/* Reset PHY automatically when TMDS clock is detected.
	 * Sets PHY_AUTO_RST4 in register PHY_CTL2.
	 * Default: false
	 */
	bool hdmi_phy_auto_reset_tmds_valid;

	/* Reset HDMI PHY automatically when hsync period is out of range.
	 * Sets H_PI_RST in register HV_RST.
	 * Default: false
	 */
	bool hdmi_phy_auto_reset_hsync_out_of_range;

	/* Reset HDMI PHY automatically when vsync period is out of range.
	 * Sets V_PI_RST in register HV_RST.
	 * Default: false
	 */
	bool hdmi_phy_auto_reset_vsync_out_of_range;
};

/* custom controls */
/* Audio sample rate in Hz */
#define TC35874X_CID_AUDIO_SAMPLING_RATE (V4L2_CID_USER_TC35874X_BASE + 0)
/* Audio present status */
#define TC35874X_CID_AUDIO_PRESENT       (V4L2_CID_USER_TC35874X_BASE + 1)

#endif