Re: [PATCH v3 10/11] drm/panel: simple: Add NewEast Optoelectronics CO., LTD WJFH116008A panel support
On Fri, Feb 22, 2019 at 10:37 AM Rob Herring wrote: > There is not any simple panel binding really. This originated I think > from a 'simple-panel' compatible that was originally attempted. What we > have is a collection of common properties for panels which panel > bindings can use. And we have some common panel docs too. I've been > meaning to clean-up and unify all this. I'm afraid I'm not right person to clean it up. My understanding of what different kind of panels and connectors need is pretty limited. Moreover I'm doing pinebook hacking in my spare time which is few hours a week and major panel/connector bindings clean up is not something I want to invest my time in. Since it seems to be a blocker I'll wait for someone to clean up panel/connector bindings and then respin the series. Meanwhile it'll live in my github. Thanks for review and sharing your ideas. Regards, Vasily ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v3 10/11] drm/panel: simple: Add NewEast Optoelectronics CO., LTD WJFH116008A panel support
On Tue, Feb 19, 2019 at 01:35:26PM -0800, Vasily Khoruzhick wrote: > On Tue, Feb 19, 2019 at 6:54 AM Rob Herring wrote: > > > > I believe using eDP connector binding wouldn't help much in my case > > > and it won't improve accuracy of hardware description while adding > > > unnecessary code duplication (edp-connector will be pretty much > > > simple-panel). > > > > > > Since currently there're no standalone connector drivers, implementing > > > one requires significant refactoring of the code that I'm not > > > familiar. > > > > I'm not talking about drivers. I'm talking about bindings. Those are > > not necessarily 1-1. There's no reason the simple panel driver can't > > have an 'edp-connector' entry. > > These aren't independent things. Bindings are useless without drivers. What I mean is bindings for panels and connectors are basically the same thing. The kernel handles them quite differently, but that is a kernel design decision independent of bindings. Another client (of DT) may do things differently or the kernel may do things differently in the future. There is not any simple panel binding really. This originated I think from a 'simple-panel' compatible that was originally attempted. What we have is a collection of common properties for panels which panel bindings can use. And we have some common panel docs too. I've been meaning to clean-up and unify all this. What I'd like is a pool of common properties for any connector or panel to use. Then we can define what subset any panel or connector use. When there's something standard across devices like LVDS modes or eDP connectors, then we can further define a subset. It is easiest if these subsets are also encapsulated by a compatible string, but that's not required and some times undesirable. For the latter, the 'simple-panel' compatible is what I'm thinking of. It needs to have a well defined meaning such as following some spec. > Also how are you going to address mainlined platforms that have eDP > and use panel bindings? E.g. rk3399 supports eDP and uses panel > binding - see rk3399-gru-kevin.dts as example. I'm not. Supporting eDP and having a standard eDP connector are 2 different things. I'd guess chromebooks would do something standard, but I've got no idea. Assuming they do, there's nothing to do for existing bindings. They are already defined. But I imagine having a 'edp-connector' fallback would be helpful to the chromebook folks. We can easily map a specific binding to a specific or generic driver. So if we ever have a generic eDP connector driver, then we could perhaps move rk3399-gru-kevin to use that. Kind of depends if it matches whatever set of properties is defined for eDP connectors. > > Also, since you have EDID, you should be using that for timing data > > IMO, and the binding needs to have enough information to support that. > > It may if DP-aux comes from the bridge chip or it may not if you need > > to describe that connection. Again, this is independent from what > > Linux chooses to do. If Linux chooses to have its own timing > > information that's its choice. Another OS may choose to use EDID. > > I see nothing wrong here - anx6345 driver reads EDID (over AUX) and > uses timing from it, if reading EDID failed it fallback to timings > defined in panel driver. Okay, I didn't look at the driver part closely. So really, it's just having a fallback compatible and defining what that includes. Rob ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v3 10/11] drm/panel: simple: Add NewEast Optoelectronics CO., LTD WJFH116008A panel support
On Tue, Feb 19, 2019 at 6:54 AM Rob Herring wrote: > > I believe using eDP connector binding wouldn't help much in my case > > and it won't improve accuracy of hardware description while adding > > unnecessary code duplication (edp-connector will be pretty much > > simple-panel). > > > > Since currently there're no standalone connector drivers, implementing > > one requires significant refactoring of the code that I'm not > > familiar. > > I'm not talking about drivers. I'm talking about bindings. Those are > not necessarily 1-1. There's no reason the simple panel driver can't > have an 'edp-connector' entry. These aren't independent things. Bindings are useless without drivers. Also how are you going to address mainlined platforms that have eDP and use panel bindings? E.g. rk3399 supports eDP and uses panel binding - see rk3399-gru-kevin.dts as example. > Also, since you have EDID, you should be using that for timing data > IMO, and the binding needs to have enough information to support that. > It may if DP-aux comes from the bridge chip or it may not if you need > to describe that connection. Again, this is independent from what > Linux chooses to do. If Linux chooses to have its own timing > information that's its choice. Another OS may choose to use EDID. I see nothing wrong here - anx6345 driver reads EDID (over AUX) and uses timing from it, if reading EDID failed it fallback to timings defined in panel driver. > Rob ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v3 10/11] drm/panel: simple: Add NewEast Optoelectronics CO., LTD WJFH116008A panel support
On Mon, Feb 18, 2019 at 1:07 PM Vasily Khoruzhick wrote: > > On Mon, Feb 18, 2019 at 10:33 AM Rob Herring wrote: > > > > On Thu, Feb 14, 2019 at 09:09:56PM -0800, Vasily Khoruzhick wrote: > > > This commit adds support for the NewEast Optoelectronics CO., LTD > > > WJFH116008A 11.6" 1920x1080 TFT LCD panel. > > > > > > Signed-off-by: Vasily Khoruzhick > > > --- > > > .../display/panel/neweast,wjfh116008a.txt | 7 > > > drivers/gpu/drm/panel/panel-simple.c | 39 +++ > > > 2 files changed, 46 insertions(+) > > > create mode 100644 > > > Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > > > > > diff --git > > > a/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > > b/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > > new file mode 100644 > > > index ..d76579f9f55e > > > --- /dev/null > > > +++ > > > b/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > > @@ -0,0 +1,7 @@ > > > +NewEast Optoelectronics CO., LTD WJFH116008A 11.6" 1920x1080 TFT LCD > > > panel > > > + > > > +Required properties: > > > +- compatible: should be "neweast,wjfh116008a" > > > + > > > +This binding is compatible with the simple-panel binding, which is > > > specified > > > +in simple-panel.txt in this directory. > > > > We already established that this goes thru a standard eDP connector. We > > should describe that and everything associated with it. > > I believe using eDP connector binding wouldn't help much in my case > and it won't improve accuracy of hardware description while adding > unnecessary code duplication (edp-connector will be pretty much > simple-panel). > > Since currently there're no standalone connector drivers, implementing > one requires significant refactoring of the code that I'm not > familiar. I'm not talking about drivers. I'm talking about bindings. Those are not necessarily 1-1. There's no reason the simple panel driver can't have an 'edp-connector' entry. Also, since you have EDID, you should be using that for timing data IMO, and the binding needs to have enough information to support that. It may if DP-aux comes from the bridge chip or it may not if you need to describe that connection. Again, this is independent from what Linux chooses to do. If Linux chooses to have its own timing information that's its choice. Another OS may choose to use EDID. Rob ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v3 10/11] drm/panel: simple: Add NewEast Optoelectronics CO., LTD WJFH116008A panel support
On Mon, Feb 18, 2019 at 10:33 AM Rob Herring wrote: > > On Thu, Feb 14, 2019 at 09:09:56PM -0800, Vasily Khoruzhick wrote: > > This commit adds support for the NewEast Optoelectronics CO., LTD > > WJFH116008A 11.6" 1920x1080 TFT LCD panel. > > > > Signed-off-by: Vasily Khoruzhick > > --- > > .../display/panel/neweast,wjfh116008a.txt | 7 > > drivers/gpu/drm/panel/panel-simple.c | 39 +++ > > 2 files changed, 46 insertions(+) > > create mode 100644 > > Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > > > diff --git > > a/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > b/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > new file mode 100644 > > index ..d76579f9f55e > > --- /dev/null > > +++ > > b/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > @@ -0,0 +1,7 @@ > > +NewEast Optoelectronics CO., LTD WJFH116008A 11.6" 1920x1080 TFT LCD panel > > + > > +Required properties: > > +- compatible: should be "neweast,wjfh116008a" > > + > > +This binding is compatible with the simple-panel binding, which is > > specified > > +in simple-panel.txt in this directory. > > We already established that this goes thru a standard eDP connector. We > should describe that and everything associated with it. I believe using eDP connector binding wouldn't help much in my case and it won't improve accuracy of hardware description while adding unnecessary code duplication (edp-connector will be pretty much simple-panel). Since currently there're no standalone connector drivers, implementing one requires significant refactoring of the code that I'm not familiar. > Rob ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: [PATCH v3 10/11] drm/panel: simple: Add NewEast Optoelectronics CO., LTD WJFH116008A panel support
On Thu, Feb 14, 2019 at 09:09:56PM -0800, Vasily Khoruzhick wrote: > This commit adds support for the NewEast Optoelectronics CO., LTD > WJFH116008A 11.6" 1920x1080 TFT LCD panel. > > Signed-off-by: Vasily Khoruzhick > --- > .../display/panel/neweast,wjfh116008a.txt | 7 > drivers/gpu/drm/panel/panel-simple.c | 39 +++ > 2 files changed, 46 insertions(+) > create mode 100644 > Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > > diff --git > a/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > b/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > new file mode 100644 > index ..d76579f9f55e > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/panel/neweast,wjfh116008a.txt > @@ -0,0 +1,7 @@ > +NewEast Optoelectronics CO., LTD WJFH116008A 11.6" 1920x1080 TFT LCD panel > + > +Required properties: > +- compatible: should be "neweast,wjfh116008a" > + > +This binding is compatible with the simple-panel binding, which is specified > +in simple-panel.txt in this directory. We already established that this goes thru a standard eDP connector. We should describe that and everything associated with it. Rob ___ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
