linux-kernel - Re: [PATCH 1/2] phy: phy-rockchip-samsung-hdptx: annotate regmap register-callback

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Message-ID: <2287157.Dhsi8hcfAM@diego>
Date: Fri, 06 Dec 2024 18:36:49 +0100
From: Heiko Stübner <heiko@...ech.de>
To: vkoul@...nel.org, kishon@...nel.org,
 Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
Cc: linux-phy@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 quentin.schulz@...rry.de, Heiko Stuebner <heiko.stuebner@...rry.de>
Subject:
 Re: [PATCH 1/2] phy: phy-rockchip-samsung-hdptx: annotate regmap
 register-callback

Am Freitag, 6. Dezember 2024, 12:18:56 CET schrieb Cristian Ciocaltea:
> On 12/6/24 12:34 PM, Heiko Stuebner wrote:
> > From: Heiko Stuebner <heiko.stuebner@...rry.de>
> > 
> > The variant of the driver in the vendor-tree contained those handy
> > comments in the regmap register callback. Having the different ranges
> > describe what they are looks helpful.
> > 
> > Signed-off-by: Heiko Stuebner <heiko.stuebner@...rry.de>
> > ---
> >  drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c | 14 +++++++-------
> >  1 file changed, 7 insertions(+), 7 deletions(-)
> > 
> > diff --git a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c b/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
> > index 4ced1479e2dc..c5c64c209e96 100644
> > --- a/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
> > +++ b/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
> > @@ -766,13 +766,13 @@ static struct tx_drv_ctrl tx_drv_ctrl_hbr2[4][4] = {
> >  static bool rk_hdptx_phy_is_rw_reg(struct device *dev, unsigned int reg)
> >  {
> >  	switch (reg) {
> > -	case 0x0000 ... 0x029c:
> > -	case 0x0400 ... 0x04a4:
> > -	case 0x0800 ... 0x08a4:
> > -	case 0x0c00 ... 0x0cb4:
> > -	case 0x1000 ... 0x10b4:
> > -	case 0x1400 ... 0x14b4:
> > -	case 0x1800 ... 0x18b4:
> > +	case 0x0000 ... 0x029c: /* CMN Register */
> > +	case 0x0400 ... 0x04a4: /* Sideband Register */
> > +	case 0x0800 ... 0x08a4: /* Lane Top Register */
> > +	case 0x0c00 ... 0x0cb4: /* Lane 0 Register */
> > +	case 0x1000 ... 0x10b4: /* Lane 1 Register */
> > +	case 0x1400 ... 0x14b4: /* Lane 2 Register */
> > +	case 0x1800 ... 0x18b4: /* Lane 3 Register */
> >  		return true;
> >  	}
> >  
> 
> Nice finding!  The HDMI variant of the driver which I used as an
> implementation reference (i.e. phy-rockchip-samsung-hdptx-hdmi.c)
> doesn't provide these comments.

yep, those comments were in the displayport variant of the phy-driver ;-) .
I don't really understand why the vendor tree contains 2 separate drivers
written by two different people, but at least it looks like we're getting
one driver in mainline, thanks to Damon's work :-)