Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
On 10/02/2012 10:06 PM, Leela Krishna Amudala wrote: On Mon, Oct 1, 2012 at 9:50 PM, Stephen Warren swar...@wwwdotorg.org wrote: On 09/30/2012 11:29 PM, Leela Krishna Amudala wrote: Hello Stephen Warren, The binding names that I use in my dts file should match with the names given in http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html right? I don't think so; the binding in that link is for example: + - xres, yres: Display resolution + - left-margin, right-margin, hsync-len: Horizontal Display timing parameters + in pixels + upper-margin, lower-margin, vsync-len: Vertical display timing parameters in + lines + - clock: displayclock in Hz i.e. a bunch of separate properties, one for each value needed to describe the display timing. However, your patch contains: I mean to say that even I have to use separate properties for each one instead of grouping them. Also the names should match with the ones given in the example..? Yes. The patch I pointed to isn't supposed to be just an example, but /the/ standard way of representing display timings. -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
On 09/30/2012 11:29 PM, Leela Krishna Amudala wrote: Hello Stephen Warren, The binding names that I use in my dts file should match with the names given in http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html right? I don't think so; the binding in that link is for example: + - xres, yres: Display resolution + - left-margin, right-margin, hsync-len: Horizontal Display timing parameters + in pixels + upper-margin, lower-margin, vsync-len: Vertical display timing parameters in + lines + - clock: displayclock in Hz i.e. a bunch of separate properties, one for each value needed to describe the display timing. However, your patch contains: + - samsung,fimd-display: This property should specify the phandle of the + display device node which holds the video interface timing with the + below mentioned properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. A single lcd-htiming property, which contains 4 values. (and a similar construct for the vertical timing). That seems entirely different to me... -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
On Monday 24 September 2012 21:35:46 Inki Dae wrote: 2012/9/22 Stephen Warren swar...@wwwdotorg.org: On 09/21/2012 01:22 AM, Inki Dae wrote: 2012/9/21 Stephen Warren swar...@wwwdotorg.org: On 09/21/2012 05:22 AM, Leela Krishna Amudala wrote: This patch adds device tree based discovery support for exynos DRM-FIMD driver which includes driver modification to handle platform data in both the cases with DT and non-DT, Also adds the documentation for bindings. diff --git a/Documentation/devicetree/bindings/drm/exynos/fimd.txt b/Documentation/devicetree/bindings/drm/exynos/fimd.txt ... + - samsung,fimd-display: This property should specify the phandle of the + display device node which holds the video interface timing with the + below mentioned properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. + + - lcd-vtiming: Specifies the vertical timing for the overlay. The + vertical timing includes four parameters in the following order. + + - vertical back porch (in number of lcd lines) + - vertical front porch (in number of lcd lines) + - vsync pulse width (in number of lcd clocks) + - Display panels Y resolution. Should this not use the new videomode timings that are under discussion at: http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html ok, I agree with you. then the videomode helper is going to be merged to mainline(3.6)? if so, this patch should be reworked based on the videomode helper. I think the videomode helpers would be merged for 3.7 at the very earliest; 3.6 is cooked already. Given there are still some comments on the binding, perhaps it won't happen until 3.8, but it'd be best to ask on that thread so that people more directly involved with the status can answer. as I mentioned before, it's better to use videomode helper instead but for this, we should wait for that the videomode helper are merged to mainline so I think it's better to merge it as is and then modify it for videomode helper to be used later. Aren't DT bindings considered as an ABI, and required to be supported more or less forever ? If you merge this DT binding you'll have to keep supporting it. That's why DT bindings should not be rushed in. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
2012/9/25 Laurent Pinchart laurent.pinch...@ideasonboard.com: On Monday 24 September 2012 21:35:46 Inki Dae wrote: 2012/9/22 Stephen Warren swar...@wwwdotorg.org: On 09/21/2012 01:22 AM, Inki Dae wrote: 2012/9/21 Stephen Warren swar...@wwwdotorg.org: On 09/21/2012 05:22 AM, Leela Krishna Amudala wrote: This patch adds device tree based discovery support for exynos DRM-FIMD driver which includes driver modification to handle platform data in both the cases with DT and non-DT, Also adds the documentation for bindings. diff --git a/Documentation/devicetree/bindings/drm/exynos/fimd.txt b/Documentation/devicetree/bindings/drm/exynos/fimd.txt ... + - samsung,fimd-display: This property should specify the phandle of the + display device node which holds the video interface timing with the + below mentioned properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. + + - lcd-vtiming: Specifies the vertical timing for the overlay. The + vertical timing includes four parameters in the following order. + + - vertical back porch (in number of lcd lines) + - vertical front porch (in number of lcd lines) + - vsync pulse width (in number of lcd clocks) + - Display panels Y resolution. Should this not use the new videomode timings that are under discussion at: http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html ok, I agree with you. then the videomode helper is going to be merged to mainline(3.6)? if so, this patch should be reworked based on the videomode helper. I think the videomode helpers would be merged for 3.7 at the very earliest; 3.6 is cooked already. Given there are still some comments on the binding, perhaps it won't happen until 3.8, but it'd be best to ask on that thread so that people more directly involved with the status can answer. as I mentioned before, it's better to use videomode helper instead but for this, we should wait for that the videomode helper are merged to mainline so I think it's better to merge it as is and then modify it for videomode helper to be used later. Aren't DT bindings considered as an ABI, and required to be supported more or less forever ? If you merge this DT binding you'll have to keep supporting it. That's why DT bindings should not be rushed in. is ABI required for DT binding? I know DT binding parses just lcd timing data from device tree file so ABI isn't needed. but when it comes to DT, I'm novice yet so there may be my missing point. could you tell me why DT bindings are considered as an ABI? if there is my missing point, will consider it again. Thanks, Inki Dae -- Regards, Laurent Pinchart ___ dri-devel mailing list dri-de...@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
On Wed, Sep 26, 2012 at 12:03:44AM +0900, Inki Dae wrote: 2012/9/25 Laurent Pinchart laurent.pinch...@ideasonboard.com: Aren't DT bindings considered as an ABI, and required to be supported more or less forever ? If you merge this DT binding you'll have to keep supporting it. That's why DT bindings should not be rushed in. is ABI required for DT binding? I know DT binding parses just lcd timing data from device tree file so ABI isn't needed. but when it comes to DT, I'm novice yet so there may be my missing point. could you tell me why DT bindings are considered as an ABI? if there is my missing point, will consider it again. It's supposed to be possible to ship a DT with a board and then boot any OS or OS version on the board. If the meaning of the DT keeps changing then this becomes impossible, you need to keep changing the DT when you change the thing that parses it (rendering the whole exercise pointless). -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
2012/9/26 Mark Brown broo...@opensource.wolfsonmicro.com: On Wed, Sep 26, 2012 at 12:03:44AM +0900, Inki Dae wrote: 2012/9/25 Laurent Pinchart laurent.pinch...@ideasonboard.com: Aren't DT bindings considered as an ABI, and required to be supported more or less forever ? If you merge this DT binding you'll have to keep supporting it. That's why DT bindings should not be rushed in. is ABI required for DT binding? I know DT binding parses just lcd timing data from device tree file so ABI isn't needed. but when it comes to DT, I'm novice yet so there may be my missing point. could you tell me why DT bindings are considered as an ABI? if there is my missing point, will consider it again. It's supposed to be possible to ship a DT with a board and then boot any OS or OS version on the board. If the meaning of the DT keeps changing then this becomes impossible, you need to keep changing the DT when you change the thing that parses it (rendering the whole exercise pointless). thank you for your comments. got it. DT is built as an binary(dtb) and the dtb file should be re-used without any modifications. will keep this patch until the videomode helper will be merged to mainline so that this could be modified based on videomode helper later. ___ linux-arm-kernel mailing list linux-arm-ker...@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
2012/9/21 Stephen Warren swar...@wwwdotorg.org: On 09/21/2012 05:22 AM, Leela Krishna Amudala wrote: This patch adds device tree based discovery support for exynos DRM-FIMD driver which includes driver modification to handle platform data in both the cases with DT and non-DT, Also adds the documentation for bindings. diff --git a/Documentation/devicetree/bindings/drm/exynos/fimd.txt b/Documentation/devicetree/bindings/drm/exynos/fimd.txt ... + - samsung,fimd-display: This property should specify the phandle of the + display device node which holds the video interface timing with the + below mentioned properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. + + - lcd-vtiming: Specifies the vertical timing for the overlay. The + vertical timing includes four parameters in the following order. + + - vertical back porch (in number of lcd lines) + - vertical front porch (in number of lcd lines) + - vsync pulse width (in number of lcd clocks) + - Display panels Y resolution. Should this not use the new videomode timings that are under discussion at: http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html ok, I agree with you. then the videomode helper is going to be merged to mainline(3.6)? if so, this patch should be reworked based on the videomode helper. ___ linux-arm-kernel mailing list linux-arm-ker...@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
On 09/21/2012 01:22 AM, Inki Dae wrote: 2012/9/21 Stephen Warren swar...@wwwdotorg.org: On 09/21/2012 05:22 AM, Leela Krishna Amudala wrote: This patch adds device tree based discovery support for exynos DRM-FIMD driver which includes driver modification to handle platform data in both the cases with DT and non-DT, Also adds the documentation for bindings. diff --git a/Documentation/devicetree/bindings/drm/exynos/fimd.txt b/Documentation/devicetree/bindings/drm/exynos/fimd.txt ... + - samsung,fimd-display: This property should specify the phandle of the + display device node which holds the video interface timing with the + below mentioned properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. + + - lcd-vtiming: Specifies the vertical timing for the overlay. The + vertical timing includes four parameters in the following order. + + - vertical back porch (in number of lcd lines) + - vertical front porch (in number of lcd lines) + - vsync pulse width (in number of lcd clocks) + - Display panels Y resolution. Should this not use the new videomode timings that are under discussion at: http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html ok, I agree with you. then the videomode helper is going to be merged to mainline(3.6)? if so, this patch should be reworked based on the videomode helper. I think the videomode helpers would be merged for 3.7 at the very earliest; 3.6 is cooked already. Given there are still some comments on the binding, perhaps it won't happen until 3.8, but it'd be best to ask on that thread so that people more directly involved with the status can answer. -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH V6 2/2] video: drm: exynos: Add device tree support
On 09/21/2012 05:22 AM, Leela Krishna Amudala wrote: This patch adds device tree based discovery support for exynos DRM-FIMD driver which includes driver modification to handle platform data in both the cases with DT and non-DT, Also adds the documentation for bindings. diff --git a/Documentation/devicetree/bindings/drm/exynos/fimd.txt b/Documentation/devicetree/bindings/drm/exynos/fimd.txt ... + - samsung,fimd-display: This property should specify the phandle of the + display device node which holds the video interface timing with the + below mentioned properties. + + - lcd-htiming: Specifies the horizontal timing for the overlay. The + horizontal timing includes four parameters in the following order. + + - horizontal back porch (in number of lcd clocks) + - horizontal front porch (in number of lcd clocks) + - hsync pulse width (in number of lcd clocks) + - Display panels X resolution. + + - lcd-vtiming: Specifies the vertical timing for the overlay. The + vertical timing includes four parameters in the following order. + + - vertical back porch (in number of lcd lines) + - vertical front porch (in number of lcd lines) + - vsync pulse width (in number of lcd clocks) + - Display panels Y resolution. Should this not use the new videomode timings that are under discussion at: http://lists.freedesktop.org/archives/dri-devel/2012-July/024875.html -- To unsubscribe from this list: send the line unsubscribe linux-samsung-soc in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
