Group: Hardware/Computers/Tablets
(→SOC: Updating info on A31) |
(→SOC: Punctuation corrections and colouring) |
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Line 35: | Line 35: | ||
! DM370(like omap3 but higher speed) | ! DM370(like omap3 but higher speed) | ||
| <span style="background:red">Powervr</span> | | <span style="background:red">Powervr</span> | ||
− | | <span style="background:green">good(free software unsigned possible)</span> | + | | <span style="background:green">good (free software unsigned possible)</span> |
| {{yes}} | | {{yes}} | ||
| Seem not | | Seem not | ||
Line 43: | Line 43: | ||
! omap4 | ! omap4 | ||
| <span style="background:red">Powervr</span> | | <span style="background:red">Powervr</span> | ||
− | | <span style="background:green">good(free software unsigned possible)</span> | + | | <span style="background:green">good (free software unsigned possible)</span> |
| {{yes}} | | {{yes}} | ||
| Seem not | | Seem not | ||
Line 51: | Line 51: | ||
! A31 | ! A31 | ||
| <span style="background:red">Powervr</span> | | <span style="background:red">Powervr</span> | ||
− | | good (free software unsigned possible) | + | | <span style="background:green">good (free software unsigned possible)</span> |
| {{yes}} | | {{yes}} | ||
| ? | | ? | ||
Line 59: | Line 59: | ||
! A10,A10s,A13,A20 | ! A10,A10s,A13,A20 | ||
| Mali | | Mali | ||
− | | <span style="background:yellow">good(free software unsigned possible, requires SD-card)</span> | + | | <span style="background:yellow">good (free software unsigned possible, requires SD-card)</span> |
| {{yes}} | | {{yes}} | ||
| ? | | ? | ||
Line 67: | Line 67: | ||
! Exynos 3 Single -> Exynos 5 dual | ! Exynos 3 Single -> Exynos 5 dual | ||
| Mali | | Mali | ||
− | | <span style="background:red">bad(part of it is software, non-free and signed on all known devices)</span> | + | | <span style="background:red">bad (part of it is software, non-free and signed on all known devices)</span> |
| {{yes}} | | {{yes}} | ||
| ? | | ? |
Revision as of 05:04, 5 June 2014
John's braindump:
The FSF wants to do something to make a completely free tablet a reality.
An important step here is the video hardware. Some chipsets have free drivers, but rely on proprietary firmware. The FSF is considering a project to replace this proprietary firmware with free firmware.
1) We should choose a chipset that is very new, so that the product will still be useful for some time.
2) We should choose something that is used in many different products, if possible.
3) We should choose something that is present in products that have the best chance of being fully free otherwise. If it has a USB port, it can get free wifi that way, for example.
4) We should pursue better relations with manufacturers to get documentation at least, or in the best case to convince them based on our reverse engineering success to do the right thing from the beginning.
We are chatting about the project in #fsf-tablet on irc.oftc.net.
About Lima: https://fosdem.org/2013/schedule/event/operating_systems_open_arm_gpu/
comparaison of chipsets
Wifi
Recent enough chipsets/drivers that could be used are:
- ath9k (mini-pcie) if the SOC has a PCI lane
- ath9k-htc (USB) The think penguin version requires 500mA
SOC
Manufacturer | SOC | GPU | Bootloader status | USB host | (mini)PCI(e) possible? | Minimum quantity required |
---|---|---|---|---|---|---|
Texas instruments | DM370(like omap3 but higher speed) | Powervr | good (free software unsigned possible) | Yes | Seem not | ? |
Texas instruments | omap4 | Powervr | good (free software unsigned possible) | Yes | Seem not | ? |
Allwinner Tech | A31 | Powervr | good (free software unsigned possible) | Yes | ? | ? |
Allwinner Tech | A10,A10s,A13,A20 | Mali | good (free software unsigned possible, requires SD-card) | Yes | ? | ? |
Samsung | Exynos 3 Single -> Exynos 5 dual | Mali | bad (part of it is software, non-free and signed on all known devices) | Yes | ? | ? |
Samsung | Exynos 5 Octa | Powervr | ? | ? | ? | ? |
Freescale | I.MX6 | vivante (must check its status) | unknown, was good on previous versions of the chip | Yes | Yes | ? |
Ingenic | JZ4760 | Vivante GC200 | Free | Yes | ? | 1 |