Overview of patches in jz-3.1 branch

Maarten ter Huurne maarten at treewalker.org
Wed Nov 2 18:59:04 EDT 2011


Hi all,

About a week ago I created the jz-3.1 branch in the qi-kernel repository, 
which contains Linux 3.1 plus patches for the Ben NanoNote and Dingoo A320. 
I'd like to see this patch set reduced by sending patches that are mature 
enough upstream for inclusion in the mainline kernel.

I grouped the patches by which part of the kernel they apply to. For those 
patches that I know the status of, I have commented, for the other patches 
I'd like others to comment (most importantly Lars, but other opinions are 
welcome too).

=== MIPS: NanoNote

qi_lb60: Don't use 3-wire spi mode for the display for now
commit 4bac1160b7780ed31b4d8fe40cb462ff16f89e85
Author: Lars-Peter Clausen <lars at metafoo.de>

Send upstream?

Add defconfig for the Ben NanoNote
commit b38a9752edaec01a0622127f838c6072719928b7
Author: Lars-Peter Clausen <lars at metafoo.de>

Is there a reason this is not upstream yet? There is already upstream 
support for the NanoNote (board-qi_lb60.c), but no config.

=== MIPS: Dingoo

MIPS: A320: Default config for Dingoo A320.
commit 5a99636945144202b0614105318923702dc4ab41
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: A320: Add Dingoo A320 board support.
commit 774717b5526b000d97a2c0f66b23fa9c157ae1ed
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: JZ4740: A320: Force vmlinuz load address on Dingoo A320
commit bb843c18cdcb15d72a0e63ebe57758a29be7b666
Author: Maarten ter Huurne <maarten at treewalker.org>

OpenDingux: initrd: Specify initrd contents using text file
commit 4646c580a390c4e4102d9ddb43fb22c6b6d9e70a
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: JZ4740: Add Dingux logo.
commit ac69b22c69c2066a2ecdaf6dacb1bca50456d586
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: A320: Added Dingoo specific README.
commit 45af28962084f92f6ed2dd8943da5b68134f9a55
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: A320: Add SoC sound support for Dingoo A320.
commit d39c5053620bd59743a6d64b980cc5e3369bf4bf
Author: Maarten ter Huurne <maarten at treewalker.org>

Not all required drivers are included in / ready for mainline yet to make 
the Dingoo config work. The most essential missing piece is SLCD support.

=== MIPS: CPU:

JZ4740 cache quirks
commit 5b523455712c2fb193f31ac70f7d67f3dc59acb4
Author: Lars-Peter Clausen <lars at metafoo.de>

This patch has been around for a while. Submit?

MIPS: Implement flush_kernel_dcache_page().
commit 42a54a2d7569cc5e1136a153a820e7484cbf7ca4
Author: Maarten ter Huurne <maarten at treewalker.org>

This is an ugly hack, but without it bounce buffers for MMC/SD are broken. 
We don't actually need bounce buffers though. Should not be sent upstream in 
its current state, but maybe it should be cleanly implemented.

=== MIPS: platform:

MIPS: JZ4740: reset: Initialize hibernate wakeup counters.
commit 5cd896c6fe51f8f090e0b2eb29e6d44e6fa50a65
Author: Maarten ter Huurne <maarten at treewalker.org>

Reduces wake-up time from 2 seconds to 100 ms. This is a welcome 
improvement, in my opinion.

=== MIPS: cpufreq:

MMC: JZ4740: Added support for CPU frequency changing.
commit 228f1d2948e0517dd444464c24cc5104ca966c31
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: JZ4740: Add cpufreq support.
commit 4d8c6ec45ce86b25639bea0d140363385a27a429
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: JZ4740: Added setting of PLL rate and main dividers.
commit 2ab204fc94838234636c4657712e463aa0c462a9
Author: Maarten ter Huurne <maarten at treewalker.org>

cpufreq_stats: Support runtime changes to frequency table.
commit 2485a5469be6d50b84e03c05654de70f64d4c346
Author: Maarten ter Huurne <maarten at treewalker.org>

Not ready to send upstream. Drivers need to be modified to avoid disrupting 
their clock while they are busy; this was done for the MMC/SD controller but 
should be done for other devices like the USB device controller as well. I 
also have some other doubts about the robustness of the code.

=== MIPS: GPIO:

MIPS: JZ4740: GPIO: Use new name for generic ack function.
commit 64804950140e13384d25ab8496528ff359105c84
Author: Maarten ter Huurne <maarten at treewalker.org>

MIPS: JZ4740: GPIO: Check correct IRQ in demux handler
commit 0d22105f793636905f0d70633789ff49a258790e
Author: Lars-Peter Clausen <lars at metafoo.de>

MIPS: JZ4740: GPIO: Simplify IRQ demuxer
commit d62e0a6752d2f988e7f6f68d1a7c748865503f49
Author: Lars-Peter Clausen <lars at metafoo.de>

MIPS: JZ4740: Use generic irq chip
commit e95573b765767d7eebdaacbf84e59a62686c0436
Author: Lars-Peter Clausen <lars at metafoo.de>

Updates to better match kernel infrastructure. Can be sent upstream, I 
think.

=== MIPS: I2C:

MIPS: JZ4740: Fix i2c driver name.
commit d020a7a5f707ffa35dc95eab861c1d93c434bc22
Author: Lars-Peter Clausen <lars at metafoo.de>

i2c: Add i2c driver for JZ47XX SoCs
commit 963f9f704ed0a91724d5079c84f2bbfec820f59f
Author: Lars-Peter Clausen <lars at metafoo.de>

On the Dingoo we're using the bitbanging GPIO I2C driver because at some 
point the JZ I2C driver wasn't working correctly. That was a long time ago 
though, I haven't re-tested recently.

OpenInkpot has some patches for the I2C driver in their git repository, but 
I don't know if those were included yet or whether they do the right thing.

=== MIPS: ADC:

mfd: jz4740-adc: Make jz4740_adc_driver static
commit 3da78c02d3755ffd35ac0775d0c84d603bd26b19
Author: Lars-Peter Clausen <lars at metafoo.de>

One-word fix, safe to upstream, I think.

=== MIPS: UDC:

usb: gadget: jz4740: Converted to new registration infrastructure.
commit 4adea3bca06ca2a733de118755cbc074d65e9c90
Author: Maarten ter Huurne <maarten at treewalker.org>

Add jz4740 udc driver
commit eb26571230d3c29b6680a4ff9e66f2f1893c7967
Author: Lars-Peter Clausen <lars at metafoo.de>

Although Lars is the patch author, the driver originates from Ingenic. Apart 
from some API updates there haven't been any recent changes as far as I 
know. So can this one can be submitted?

=== MIPS: MMC:

MMC: JZ4740: Fix warning.
commit 3ce6aa621508f9d8937197371f022f596ab1e4fa
Author: Maarten ter Huurne <maarten at treewalker.org>

Safe to send upstream, I think.

=== MIPS: NAND:

MTD: NAND: JZ4740: Multi-bank support with autodetection
commit cac9ecaf448642d478240fe8d179c2a9d920bdfa
Author: Maarten ter Huurne <maarten at treewalker.org>

The multi-bank detection seems to work fine on the various A320 models, so I 
think it's safe to upstream this.

MTD: NAND: JZ4740: Fix possible uninitialized pointer.
commit e098aaf91ef481a53133c3978e42fbfbb7081cdb
Author: Maarten ter Huurne <maarten at treewalker.org>

This should be sent upstream, in my opinion.

=== generic MTD:

ubi: Read only the vid header instead of the whole page
commit 084c939bc5acfe299b11bd6bfde06586dea01984
Author: Lars-Peter Clausen <lars at metafoo.de>

NAND: Add support for subpage reads for NAND_ECC_HW_OOB_FIRST
commit 4010626ef8943cc1cd2f7bae5301339b5116610e
Author: Lars-Peter Clausen <lars at metafoo.de>

NAND: Optimize NAND_ECC_HW_OOB_FIRST read
commit f0a40e2672110f50b21f99b3cdd7e9aa343f033e
Author: Lars-Peter Clausen <lars at metafoo.de>

These are optimizations to reduce the boot time on the NanoNote. Are they 
safe to send upstream?

There was a fourth patch, labeled in the commit itself as "evil hack", which 
broke NAND reading on the Dingoo; that patch didn't make it to jz-3.1 but 
might be worthwhile to rework.

mtd: cc_ftl: New FTL driver for media players using China Chip firmware.
commit cb54a95fdbe5e2b5014b725e27e8c9b3a6c748fc
Author: Maarten ter Huurne <maarten at treewalker.org>

Not ready yet for submission: needs locking and more robust handling of bad 
data.

=== video:

Add ili8960 lcd driver
commit cd6264c67526f198fc8c568fa8b4f578be5aa3bf
Author: Lars-Peter Clausen <lars at metafoo.de>

Used by the NanoNote. I don't know anything about this one.

MIPS: JZ4740: SLCD framebufer driver.
commit 27f826d6f722bf3741441e2159bfadd5cac2476b
Author: Maarten ter Huurne <maarten at treewalker.org>

Although it is usable, this driver is too messy to submit. Actually I think 
it would be better to adapt the LCD framebuffer driver to support SLCD mode 
as well.

Framebuffer notifier: Call notifier callbacks prior to blanking the screen
commit d111ee753dd71beedb394a79da6285d7ce6e6204
Author: Lars-Peter Clausen <lars at metafoo.de>

Changes in the generic framebuffer code. Is this is a bug fix or a change of 
the kernel infrastructure?

=== audio:

ASoC: JZ4740: Support buffer size that is not a multiple of period size.
commit a89e974cab68554ad577944e1556fcbe676e0fdd
Author: Maarten ter Huurne <maarten at treewalker.org>

Fixes some audio glitches but not all. Since it is a step forward, we could 
submit it?

ASoC: JZ4740: Replaced comma operators with semicolons.
commit 7c4447b5440ad9f4319ef4379322bcc09cb9604a
Author: Maarten ter Huurne <maarten at treewalker.org>

Simple cleanup, should be safe to submit.

=== media:

media: radio: RDA5807: Added driver.
commit daf6635b83d8430f2c5619ab69506434120ad546
Author: Maarten ter Huurne <maarten at treewalker.org>

Work in progress.

=== misc:

/dev/mem: Add kernel config option to omit this device.
commit 94cbaf98b01b42ef4a210f893d4dd1bceb3ff8e3
Author: Maarten ter Huurne <maarten at treewalker.org>

There is no need for /dev/mem to be mandatory, in my opinion. Nothing 
depends on this patch, so I'll send it upstream in isolation.

===

I look forward to your comments.

Bye,
		Maarten




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