Dear dri-devel, spec. Dear i.MX folks,
I would like to display a splash screen on an i.MX6 based board from the kernel as soon as the display hardware is initialized. But I'm having trouble finding some kind of 'take this buffer and display it' function within the IPU driver. (And I see no way of specifying such thing within the device tree)
I tried to trace a userspace write to /dev/fb0 to see where it ends up, but didn't succeed in finding the right entry point. I am aware of the fact that the bootloader typically displays a splash and linux then doesn't touch it, but this solution is not feasible for me, mostly because it would include duplicating the functionality of a display driver when the kernel offers a working one.
Has anybody built a splash from the kernel before? Or can anyone give me a few pointers where to look for a start within the driver? Any help is appreciated.
regards, Stephan
Hi,
On 3 November 2017 at 16:56, Stephan Bauroth der_steffi@gmx.de wrote:
Dear dri-devel, spec. Dear i.MX folks,
I would like to display a splash screen on an i.MX6 based board from the kernel as soon as the display hardware is initialized. But I'm having trouble finding some kind of 'take this buffer and display it' function within the IPU driver. (And I see no way of specifying such thing within the device tree)
I tried to trace a userspace write to /dev/fb0 to see where it ends up, but didn't succeed in finding the right entry point. I am aware of the fact that the bootloader typically displays a splash and linux then doesn't touch it, but this solution is not feasible for me, mostly because it would include duplicating the functionality of a display driver when the kernel offers a working one.
Has anybody built a splash from the kernel before? Or can anyone give me a few pointers where to look for a start within the driver? Any help is appreciated.
regards, Stephan _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Please take a look at http://lkml.iu.edu/hypermail/linux/kernel/1710.3/01542.html. I think your need is similar to this. The solution is not mainline yet.
Thanks, PrasannaKumar
On 03.11.2017 13:57, PrasannaKumar Muralidharan wrote:
Hi,
On 3 November 2017 at 16:56, Stephan Bauroth der_steffi@gmx.de wrote:
Dear dri-devel, spec. Dear i.MX folks,
I would like to display a splash screen on an i.MX6 based board from the kernel as soon as the display hardware is initialized. But I'm having trouble finding some kind of 'take this buffer and display it' function within the IPU driver. (And I see no way of specifying such thing within the device tree)
I tried to trace a userspace write to /dev/fb0 to see where it ends up, but didn't succeed in finding the right entry point. I am aware of the fact that the bootloader typically displays a splash and linux then doesn't touch it, but this solution is not feasible for me, mostly because it would include duplicating the functionality of a display driver when the kernel offers a working one.
Has anybody built a splash from the kernel before? Or can anyone give me a few pointers where to look for a start within the driver? Any help is appreciated.
regards, Stephan _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
Please take a look at http://lkml.iu.edu/hypermail/linux/kernel/1710.3/01542.html. I think your need is similar to this. The solution is not mainline yet.
Thanks, PrasannaKumar
That indeed looks promising, I will look into it. Thanks!
Stephan
dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
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PrasannaKumar Muralidharan -
Stephan Bauroth