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Tue, 28 Sep 2021 20:48:55 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20210928204855eusmtrp2665eecc47a106f3b6dbe246484ce2420~pF3X_uOHF2073220732eusmtrp2J; Tue, 28 Sep 2021 20:48:55 +0000 (GMT) X-AuditID: cbfec7f2-7d5ff7000002b2bc-7e-61537fb7bb7d Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 91.54.20981.7BF73516; Tue, 28 Sep 2021 21:48:55 +0100 (BST) Received: from [106.210.131.79] (unknown [106.210.131.79]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20210928204855eusmtip1de1158938d0fee7434cac6eb4fb24274~pF3XmT0NR1529415294eusmtip1U; Tue, 28 Sep 2021 20:48:55 +0000 (GMT) Message-ID: <35b4b0de-7b15-f6b3-bc1d-bcaf284102c9@samsung.com> Date: Tue, 28 Sep 2021 22:48:54 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Thunderbird/93.0 Subject: Re: [PATCH v2 2/2] drm: rcar-du: Add R-Car DSI driver Content-Language: pl To: Laurent Pinchart Cc: dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, LUU HOAI , Kieran Bingham From: Andrzej Hajda In-Reply-To: Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupnleLIzCtJLcpLzFFi42LZduzned3t9cGJBj29VhZXvr5ns3j7ay6L xbbTv1ktOicuYbfY+vIdkwOrx+yOmawe97uPM3l8OzORxePzJrkAligum5TUnMyy1CJ9uwSu jM9fTrEUPA6puNWwh7mB8ZZLFyMnh4SAicSH3p3sXYxcHEICKxglvs05zAjhfGGUWDRjKguE 85lRonn9LyaYlplnW9kgEssZJV6+OgDV/55RoqflKBtIFa+AncT7BT3MIDaLgKrEs4kTmCHi ghInZz5hAbFFBRIkXt/bBFTPwSEMVD/7bBlImFlAROLGoxZGEFtEwEKid9F0sJOYBRYwStx5 tgXsCjYBTYm/m2+C7eIUsJL4dO0gI0SzvETz1tnMIA0SAic4JPbdusEKcbaLxM2eOcwQtrDE q+Nb2CFsGYn/O+dDvVYvcX9FC1RzB6PE1g07oRqsJe6c+wV2KTPQ5vW79CHCjhLfnrxlAQlL CPBJ3HgrCHEDn8SkbdOZIcK8Eh1tQhDVihL3z26FGigusfTCV7YJjEqzkEJlFpL3ZyH5ZhbC 3gWMLKsYxVNLi3PTU4sN81LL9YoTc4tL89L1kvNzNzEC08zpf8c/7WCc++qj3iFGJg7GQ4wS HMxKIrw/xIMThXhTEiurUovy44tKc1KLDzFKc7AoifOumr0mXkggPbEkNTs1tSC1CCbLxMEp 1cDUWO+9M0x6NWfuo1l7/PSPe6jO2jEjQ7F+zZ8TYr8OxQSEBEple5elfXIoW+EZcV7AvMlP JbzG8dSW33zG01d5NaiZGkommL1+/m22iqD12ugX8exqH9tV0zu4fn7dZed/m3HimtX8jd6x /1UyMj6oJK06Esh5etrH1zO8i4+z3XW/cdP1zTxlrsDEhywPn4iG75iw31Xw+bvM3zH8izTn f7i9fPPXQC6dHXx11bwT26JDLDl05m3+I+KxNnvFvgnlP6cc2KHwQbPjvceNlZOnti8t49Do PvW166rM4/e/f5+14qwSjptoM/PFZQVJhpWqNqnzz3xyOtTBebnq9r22+JvRfw5KhhhahKhU bTqsxFKckWioxVxUnAgAWFhIw6IDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrIIsWRmVeSWpSXmKPExsVy+t/xu7rb64MTDR5dE7O48vU9m8XbX3NZ LLad/s1q0TlxCbvF1pfvmBxYPWZ3zGT1uN99nMnj25mJLB6fN8kFsETp2RTll5akKmTkF5fY KkUbWhjpGVpa6BmZWOoZGpvHWhmZKunb2aSk5mSWpRbp2yXoZXz+coql4HFIxa2GPcwNjLdc uhg5OSQETCRmnm1lA7GFBJYySjT9F4OIi0vsnv+WGcIWlvhzrQuohguo5i2jxOXDP8AaeAXs JN4v6AErYhFQlXg2cQIzRFxQ4uTMJywgtqhAgsTkm/NYuxg5OISB6mefLQMJMwuISNx41MII YosIWEj0LprOCDKfWWABo8Tz3u9MEMv+MElcW7uQCaSKTUBT4u/mm2CLOQWsJD5dO8gIMclM omtrF5QtL9G8dTbzBEahWUjumIVk4SwkLbOQtCxgZFnFKJJaWpybnltspFecmFtcmpeul5yf u4kRGFfbjv3csoNx5auPeocYmTgYDzFKcDArifD+EA9OFOJNSaysSi3Kjy8qzUktPsRoCgyM icxSosn5wMjOK4k3NDMwNTQxszQwtTQzVhLnNTmyJl5IID2xJDU7NbUgtQimj4mDU6qBKWzl ze4ZLy5LZM7MYL61yLeO/5xeoZH5YzmtX+8KT3/1nrHsKkdD/JN20bIM7p/neteUXvkctCz0 vpVGnKb0DQ/De1J8CTZibN0ut9dvYhDVy07y2een/KNQQE7xDpcI91WtG8Vt4ZfssqQuSnAt kliQZlyv5cJcvWPfNoX+V7fkJtxQvil/4cGU5wHTTzJbxZw2X/to4mztH06+YWcfLZt24cO1 3pk99zpemKYweb6+vVbtzZ7bRldZlh+ZXzb/z9TkK//sbbKXqLbm/O+5vOdGpCf31QAT9ptr eX7dP/f744GJV17a3An1srYI/qO27HLdKUc7S/lG6S0lgg8jipyWbPa3NTbN2f/TazfHHCWW 4oxEQy3mouJEAKxoY7k0AwAA X-CMS-MailID: 20210928204855eucas1p2c087c233ca4f685bddb4293283e8b7c6 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20210623135723eucas1p20cda75f712144a9ffd3ad22401123063 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20210623135723eucas1p20cda75f712144a9ffd3ad22401123063 References: <20210623135639.17125-1-laurent.pinchart+renesas@ideasonboard.com> <20210623135639.17125-3-laurent.pinchart+renesas@ideasonboard.com> <162326cb-1291-b6e0-3a70-177229be4aa7@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hi, Sorry, I missed this email. W dniu 23.09.2021 o 00:32, Laurent Pinchart pisze: > Hi Andrzej, > > On Wed, Sep 22, 2021 at 04:29:39AM +0300, Laurent Pinchart wrote: >> On Tue, Sep 21, 2021 at 09:42:11PM +0200, Andrzej Hajda wrote: >>> W dniu 23.06.2021 o 15:56, Laurent Pinchart pisze: >>>> From: LUU HOAI >>>> >>>> The driver supports the MIPI DSI/CSI-2 TX encoder found in the R-Car V3U >>>> SoC. It currently supports DSI mode only. >>>> >>>> Signed-off-by: LUU HOAI >>>> Signed-off-by: Laurent Pinchart >>>> Reviewed-by: Kieran Bingham >>>> Tested-by: Kieran Bingham >>>> --- >>>> drivers/gpu/drm/rcar-du/Kconfig | 6 + >>>> drivers/gpu/drm/rcar-du/Makefile | 1 + >>>> drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c | 827 +++++++++++++++++++ >>>> drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h | 172 ++++ >>>> 4 files changed, 1006 insertions(+) >>>> create mode 100644 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c >>>> create mode 100644 drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h ... >>>> + >>>> + ret = drm_of_find_panel_or_bridge(dsi->dev->of_node, 1, 0, &panel, >>>> + &dsi->next_bridge); >>> You are looking for sink but DSI host is not yet registered, thus DSI >>> child devices not yet created/bound,  so in case of DSI-controlled sinks >>> it will be always error. >> Correct, it will not work for a sink that is controlled through DSI. >> We've tested this with a sink controlled through I2C, as that's all we >> have on the development board. That won't be very future-proof of >> course. >> >>> Please look at pending documentation patch[1] for more in-depth explanation. >>> >>> [1]: https://protect2.fireeye.com/v1/url?k=ccc70571-935c3c5e-ccc68e3e-0cc47a31cdf8-cd122187fddf557d&q=1&e=311a381f-74cc-4b35-a344-362bc742c941&u=https%3A%2F%2Flkml.org%2Flkml%2F2021%2F9%2F10%2F165 >> I'll review that series. > To clarify your point, do you consider this a blocker for merging this > series, or something that can be addressed on top ? The best would be to fix it before merge - the rule of thumb is that bad patterns spread quite fast :) If there is good reason to postpone the fix, please send it ASAP. Regards Andrzej > >>>> + if (ret) { >>>> + dev_err_probe(dsi->dev, ret, "could not find next bridge\n"); >>>> + return ret; >>>> + } >>>> + >>>> + if (!dsi->next_bridge) { >>>> + dsi->next_bridge = devm_drm_panel_bridge_add(dsi->dev, panel); >>>> + if (IS_ERR(dsi->next_bridge)) { >>>> + dev_err(dsi->dev, "failed to create panel bridge\n"); >>>> + return PTR_ERR(dsi->next_bridge); >>>> + } >>>> + } >>>> + >>>> + /* Initialize the DSI host. */ >>>> + dsi->host.dev = dsi->dev; >>>> + dsi->host.ops = &rcar_mipi_dsi_host_ops; >>>> + ret = mipi_dsi_host_register(&dsi->host); >>>> + if (ret < 0) >>>> + return ret; >>>> + >>>> + /* Initialize the DRM bridge. */ >>>> + dsi->bridge.funcs = &rcar_mipi_dsi_bridge_ops; >>>> + dsi->bridge.of_node = dsi->dev->of_node; >>>> + drm_bridge_add(&dsi->bridge); >>>> + >>>> + return 0; >>>> +} >>>> + >>>> +static int rcar_mipi_dsi_remove(struct platform_device *pdev) >>>> +{ >>>> + struct rcar_mipi_dsi *dsi = platform_get_drvdata(pdev); >>>> + >>>> + drm_bridge_remove(&dsi->bridge); >>>> + >>>> + mipi_dsi_host_unregister(&dsi->host); >>>> + >>>> + return 0; >>>> +} >>>> + >>>> +static const struct of_device_id rcar_mipi_dsi_of_table[] = { >>>> + { .compatible = "renesas,r8a779a0-dsi-csi2-tx" }, >>>> + { } >>>> +}; >>>> + >>>> +MODULE_DEVICE_TABLE(of, rcar_mipi_dsi_of_table); >>>> + >>>> +static struct platform_driver rcar_mipi_dsi_platform_driver = { >>>> + .probe = rcar_mipi_dsi_probe, >>>> + .remove = rcar_mipi_dsi_remove, >>>> + .driver = { >>>> + .name = "rcar-mipi-dsi", >>>> + .of_match_table = rcar_mipi_dsi_of_table, >>>> + }, >>>> +}; >>>> + >>>> +module_platform_driver(rcar_mipi_dsi_platform_driver); >>>> + >>>> +MODULE_DESCRIPTION("Renesas R-Car MIPI DSI Encoder Driver"); >>>> +MODULE_LICENSE("GPL"); >>>> diff --git a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h >>>> new file mode 100644 >>>> index 000000000000..0e7a9274749f >>>> --- /dev/null >>>> +++ b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h >>>> @@ -0,0 +1,172 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* >>>> + * rcar_mipi_dsi_regs.h -- R-Car MIPI DSI Interface Registers Definitions >>>> + * >>>> + * Copyright (C) 2020 Renesas Electronics Corporation >>>> + */ >>>> + >>>> +#ifndef __RCAR_MIPI_DSI_REGS_H__ >>>> +#define __RCAR_MIPI_DSI_REGS_H__ >>>> + >>>> +#define LINKSR 0x010 >>>> +#define LINKSR_LPBUSY (1 << 1) >>>> +#define LINKSR_HSBUSY (1 << 0) >>>> + >>>> +/* >>>> + * Video Mode Register >>>> + */ >>>> +#define TXVMSETR 0x180 >>>> +#define TXVMSETR_SYNSEQ_PULSES (0 << 16) >>>> +#define TXVMSETR_SYNSEQ_EVENTS (1 << 16) >>>> +#define TXVMSETR_VSTPM (1 << 15) >>>> +#define TXVMSETR_PIXWDTH (1 << 8) >>>> +#define TXVMSETR_VSEN_EN (1 << 4) >>>> +#define TXVMSETR_VSEN_DIS (0 << 4) >>>> +#define TXVMSETR_HFPBPEN_EN (1 << 2) >>>> +#define TXVMSETR_HFPBPEN_DIS (0 << 2) >>>> +#define TXVMSETR_HBPBPEN_EN (1 << 1) >>>> +#define TXVMSETR_HBPBPEN_DIS (0 << 1) >>>> +#define TXVMSETR_HSABPEN_EN (1 << 0) >>>> +#define TXVMSETR_HSABPEN_DIS (0 << 0) >>>> + >>>> +#define TXVMCR 0x190 >>>> +#define TXVMCR_VFCLR (1 << 12) >>>> +#define TXVMCR_EN_VIDEO (1 << 0) >>>> + >>>> +#define TXVMSR 0x1a0 >>>> +#define TXVMSR_STR (1 << 16) >>>> +#define TXVMSR_VFRDY (1 << 12) >>>> +#define TXVMSR_ACT (1 << 8) >>>> +#define TXVMSR_RDY (1 << 0) >>>> + >>>> +#define TXVMSCR 0x1a4 >>>> +#define TXVMSCR_STR (1 << 16) >>>> + >>>> +#define TXVMPSPHSETR 0x1c0 >>>> +#define TXVMPSPHSETR_DT_RGB16 (0x0e << 16) >>>> +#define TXVMPSPHSETR_DT_RGB18 (0x1e << 16) >>>> +#define TXVMPSPHSETR_DT_RGB18_LS (0x2e << 16) >>>> +#define TXVMPSPHSETR_DT_RGB24 (0x3e << 16) >>>> +#define TXVMPSPHSETR_DT_YCBCR16 (0x2c << 16) >>>> + >>>> +#define TXVMVPRMSET0R 0x1d0 >>>> +#define TXVMVPRMSET0R_HSPOL_HIG (0 << 17) >>>> +#define TXVMVPRMSET0R_HSPOL_LOW (1 << 17) >>>> +#define TXVMVPRMSET0R_VSPOL_HIG (0 << 16) >>>> +#define TXVMVPRMSET0R_VSPOL_LOW (1 << 16) >>>> +#define TXVMVPRMSET0R_CSPC_RGB (0 << 4) >>>> +#define TXVMVPRMSET0R_CSPC_YCbCr (1 << 4) >>>> +#define TXVMVPRMSET0R_BPP_16 (0 << 0) >>>> +#define TXVMVPRMSET0R_BPP_18 (1 << 0) >>>> +#define TXVMVPRMSET0R_BPP_24 (2 << 0) >>>> + >>>> +#define TXVMVPRMSET1R 0x1d4 >>>> +#define TXVMVPRMSET1R_VACTIVE(x) (((x) & 0x7fff) << 16) >>>> +#define TXVMVPRMSET1R_VSA(x) (((x) & 0xfff) << 0) >>>> + >>>> +#define TXVMVPRMSET2R 0x1d8 >>>> +#define TXVMVPRMSET2R_VFP(x) (((x) & 0x1fff) << 16) >>>> +#define TXVMVPRMSET2R_VBP(x) (((x) & 0x1fff) << 0) >>>> + >>>> +#define TXVMVPRMSET3R 0x1dc >>>> +#define TXVMVPRMSET3R_HACTIVE(x) (((x) & 0x7fff) << 16) >>>> +#define TXVMVPRMSET3R_HSA(x) (((x) & 0xfff) << 0) >>>> + >>>> +#define TXVMVPRMSET4R 0x1e0 >>>> +#define TXVMVPRMSET4R_HFP(x) (((x) & 0x1fff) << 16) >>>> +#define TXVMVPRMSET4R_HBP(x) (((x) & 0x1fff) << 0) >>>> + >>>> +/* >>>> + * PHY-Protocol Interface (PPI) Registers >>>> + */ >>>> +#define PPISETR 0x700 >>>> +#define PPISETR_DLEN_0 (0x1 << 0) >>>> +#define PPISETR_DLEN_1 (0x3 << 0) >>>> +#define PPISETR_DLEN_2 (0x7 << 0) >>>> +#define PPISETR_DLEN_3 (0xf << 0) >>>> +#define PPISETR_CLEN (1 << 8) >>>> + >>>> +#define PPICLCR 0x710 >>>> +#define PPICLCR_TXREQHS (1 << 8) >>>> +#define PPICLCR_TXULPSEXT (1 << 1) >>>> +#define PPICLCR_TXULPSCLK (1 << 0) >>>> + >>>> +#define PPICLSR 0x720 >>>> +#define PPICLSR_HSTOLP (1 << 27) >>>> +#define PPICLSR_TOHS (1 << 26) >>>> +#define PPICLSR_STPST (1 << 0) >>>> + >>>> +#define PPICLSCR 0x724 >>>> +#define PPICLSCR_HSTOLP (1 << 27) >>>> +#define PPICLSCR_TOHS (1 << 26) >>>> + >>>> +#define PPIDLSR 0x760 >>>> +#define PPIDLSR_STPST (0xf << 0) >>>> + >>>> +/* >>>> + * Clocks registers >>>> + */ >>>> +#define LPCLKSET 0x1000 >>>> +#define LPCLKSET_CKEN (1 << 8) >>>> +#define LPCLKSET_LPCLKDIV(x) (((x) & 0x3f) << 0) >>>> + >>>> +#define CFGCLKSET 0x1004 >>>> +#define CFGCLKSET_CKEN (1 << 8) >>>> +#define CFGCLKSET_CFGCLKDIV(x) (((x) & 0x3f) << 0) >>>> + >>>> +#define DOTCLKDIV 0x1008 >>>> +#define DOTCLKDIV_CKEN (1 << 8) >>>> +#define DOTCLKDIV_DOTCLKDIV(x) (((x) & 0x3f) << 0) >>>> + >>>> +#define VCLKSET 0x100c >>>> +#define VCLKSET_CKEN (1 << 16) >>>> +#define VCLKSET_COLOR_RGB (0 << 8) >>>> +#define VCLKSET_COLOR_YCC (1 << 8) >>>> +#define VCLKSET_DIV(x) (((x) & 0x3) << 4) >>>> +#define VCLKSET_BPP_16 (0 << 2) >>>> +#define VCLKSET_BPP_18 (1 << 2) >>>> +#define VCLKSET_BPP_18L (2 << 2) >>>> +#define VCLKSET_BPP_24 (3 << 2) >>>> +#define VCLKSET_LANE(x) (((x) & 0x3) << 0) >>>> + >>>> +#define VCLKEN 0x1010 >>>> +#define VCLKEN_CKEN (1 << 0) >>>> + >>>> +#define PHYSETUP 0x1014 >>>> +#define PHYSETUP_HSFREQRANGE(x) (((x) & 0x7f) << 16) >>>> +#define PHYSETUP_HSFREQRANGE_MASK (0x7f << 16) >>>> +#define PHYSETUP_CFGCLKFREQRANGE(x) (((x) & 0x3f) << 8) >>>> +#define PHYSETUP_SHUTDOWNZ (1 << 1) >>>> +#define PHYSETUP_RSTZ (1 << 0) >>>> + >>>> +#define CLOCKSET1 0x101c >>>> +#define CLOCKSET1_LOCK_PHY (1 << 17) >>>> +#define CLOCKSET1_LOCK (1 << 16) >>>> +#define CLOCKSET1_CLKSEL (1 << 8) >>>> +#define CLOCKSET1_CLKINSEL_EXTAL (0 << 2) >>>> +#define CLOCKSET1_CLKINSEL_DIG (1 << 2) >>>> +#define CLOCKSET1_CLKINSEL_DU (1 << 3) >>>> +#define CLOCKSET1_SHADOW_CLEAR (1 << 1) >>>> +#define CLOCKSET1_UPDATEPLL (1 << 0) >>>> + >>>> +#define CLOCKSET2 0x1020 >>>> +#define CLOCKSET2_M(x) (((x) & 0xfff) << 16) >>>> +#define CLOCKSET2_VCO_CNTRL(x) (((x) & 0x3f) << 8) >>>> +#define CLOCKSET2_N(x) (((x) & 0xf) << 0) >>>> + >>>> +#define CLOCKSET3 0x1024 >>>> +#define CLOCKSET3_PROP_CNTRL(x) (((x) & 0x3f) << 24) >>>> +#define CLOCKSET3_INT_CNTRL(x) (((x) & 0x3f) << 16) >>>> +#define CLOCKSET3_CPBIAS_CNTRL(x) (((x) & 0x7f) << 8) >>>> +#define CLOCKSET3_GMP_CNTRL(x) (((x) & 0x3) << 0) >>>> + >>>> +#define PHTW 0x1034 >>>> +#define PHTW_DWEN (1 << 24) >>>> +#define PHTW_TESTDIN_DATA(x) (((x) & 0xff) << 16) >>>> +#define PHTW_CWEN (1 << 8) >>>> +#define PHTW_TESTDIN_CODE(x) (((x) & 0xff) << 0) >>>> + >>>> +#define PHTC 0x103c >>>> +#define PHTC_TESTCLR (1 << 0) >>>> + >>>> +#endif /* __RCAR_MIPI_DSI_REGS_H__ */