Revert "BCM270X_DT: mz61581: Revert to spi-bcm2708" #1132
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This reverts commit 1820cd0. The spi-bcm2835 driver has been fixed, so now we can use it again. Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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Don't pull this yet, I have to change txbuflen to get good throughput. The dma mapping/engine overhead is high. |
Because of the spi dma mapping/engine overhead with spi-bcm2835, txbuflen has to be increased from 4096 to 32768 to maximize throughput (11MB/s at 128MHz). Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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Done updating PR. |
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For the SPI DMA curious: For comparison, the out-of-tree spi-bcm2708 can do 12MB/s with 4k buffers, but relies on the legacy DMA API. |
pelwell
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Revert "BCM270X_DT: mz61581: Revert to spi-bcm2708"
popcornmix
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kernel: Revert "BCM270X_DT: mz61581: Revert to spi-bcm2708" See: raspberrypi/linux#1132 kernel: bcm2835-mmc: Don't overwrite MMC capabilities from DT kernel: BCM270X_DT: Use fixed-factor-clock for uart1 See: raspberrypi/linux#1008 kernel: vchiq: fix NULL pointer dereference when closing driver See: raspberrypi/linux#1123 firmware: Fix touchscreen I2C to only read from i2c in smaller bursts to avoid a fifo overrun problem with the i2c peripheral See: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=120642 firmware: arm_display: Fix issue with nonsensical negative overscan settings See: #471 firmware: arm_loader: Enable the i2c_arm and i2c_vc aliases for CM See: raspberrypi/linux#1129 firmware: di_adv: Allow the v3d priority boost to be modified See: http://forum.kodi.tv/showthread.php?tid=231092&pid=2103200#pid2103200
popcornmix
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kernel: Revert "BCM270X_DT: mz61581: Revert to spi-bcm2708" See: raspberrypi/linux#1132 kernel: bcm2835-mmc: Don't overwrite MMC capabilities from DT kernel: BCM270X_DT: Use fixed-factor-clock for uart1 See: raspberrypi/linux#1008 kernel: vchiq: fix NULL pointer dereference when closing driver See: raspberrypi/linux#1123 firmware: Fix touchscreen I2C to only read from i2c in smaller bursts to avoid a fifo overrun problem with the i2c peripheral See: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=120642 firmware: arm_display: Fix issue with nonsensical negative overscan settings See: raspberrypi/firmware#471 firmware: arm_loader: Enable the i2c_arm and i2c_vc aliases for CM See: raspberrypi/linux#1129 firmware: di_adv: Allow the v3d priority boost to be modified See: http://forum.kodi.tv/showthread.php?tid=231092&pid=2103200#pid2103200
neuschaefer
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Feb 27, 2017
kernel: Revert "BCM270X_DT: mz61581: Revert to spi-bcm2708" See: raspberrypi/linux#1132 kernel: bcm2835-mmc: Don't overwrite MMC capabilities from DT kernel: BCM270X_DT: Use fixed-factor-clock for uart1 See: raspberrypi/linux#1008 kernel: vchiq: fix NULL pointer dereference when closing driver See: raspberrypi/linux#1123 firmware: Fix touchscreen I2C to only read from i2c in smaller bursts to avoid a fifo overrun problem with the i2c peripheral See: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=120642 firmware: arm_display: Fix issue with nonsensical negative overscan settings See: raspberrypi#471 firmware: arm_loader: Enable the i2c_arm and i2c_vc aliases for CM See: raspberrypi/linux#1129 firmware: di_adv: Allow the v3d priority boost to be modified See: http://forum.kodi.tv/showthread.php?tid=231092&pid=2103200#pid2103200
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This reverts commit 1820cd0.
The spi-bcm2835 driver has been fixed, so now we can use it again.
Signed-off-by: Noralf Trønnes noralf@tronnes.org