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  1. Mar 27, 2019
    • Christoph Muellner's avatar
      arm64: dts: rockchip: Disable DCMDs on RK3399's eMMC controller. · a3eec13b
      Christoph Muellner authored
      
      
      When using direct commands (DCMDs) on an RK3399, we get spurious
      CQE completion interrupts for the DCMD transaction slot (#31):
      
      [  931.196520] ------------[ cut here ]------------
      [  931.201702] mmc1: cqhci: spurious TCN for tag 31
      [  931.206906] WARNING: CPU: 0 PID: 1433 at /usr/src/kernel/drivers/mmc/host/cqhci.c:725 cqhci_irq+0x2e4/0x490
      [  931.206909] Modules linked in:
      [  931.206918] CPU: 0 PID: 1433 Comm: irq/29-mmc1 Not tainted 4.19.8-rt6-funkadelic #1
      [  931.206920] Hardware name: Theobroma Systems RK3399-Q7 SoM (DT)
      [  931.206924] pstate: 40000005 (nZcv daif -PAN -UAO)
      [  931.206927] pc : cqhci_irq+0x2e4/0x490
      [  931.206931] lr : cqhci_irq+0x2e4/0x490
      [  931.206933] sp : ffff00000e54bc80
      [  931.206934] x29: ffff00000e54bc80 x28: 0000000000000000
      [  931.206939] x27: 0000000000000001 x26: ffff000008f217e8
      [  931.206944] x25: ffff8000f02ef030 x24: ffff0000091417b0
      [  931.206948] x23: ffff0000090aa000 x22: ffff8000f008b000
      [  931.206953] x21: 0000000000000002 x20: 000000000000001f
      [  931.206957] x19: ffff8000f02ef018 x18: ffffffffffffffff
      [  931.206961] x17: 0000000000000000 x16: 0000000000000000
      [  931.206966] x15: ffff0000090aa6c8 x14: 0720072007200720
      [  931.206970] x13: 0720072007200720 x12: 0720072007200720
      [  931.206975] x11: 0720072007200720 x10: 0720072007200720
      [  931.206980] x9 : 0720072007200720 x8 : 0720072007200720
      [  931.206984] x7 : 0720073107330720 x6 : 00000000000005a0
      [  931.206988] x5 : ffff00000860d4b0 x4 : 0000000000000000
      [  931.206993] x3 : 0000000000000001 x2 : 0000000000000001
      [  931.206997] x1 : 1bde3a91b0d4d900 x0 : 0000000000000000
      [  931.207001] Call trace:
      [  931.207005]  cqhci_irq+0x2e4/0x490
      [  931.207009]  sdhci_arasan_cqhci_irq+0x5c/0x90
      [  931.207013]  sdhci_irq+0x98/0x930
      [  931.207019]  irq_forced_thread_fn+0x2c/0xa0
      [  931.207023]  irq_thread+0x114/0x1c0
      [  931.207027]  kthread+0x128/0x130
      [  931.207032]  ret_from_fork+0x10/0x20
      [  931.207035] ---[ end trace 0000000000000002 ]---
      
      The driver shows this message only for the first spurious interrupt
      by using WARN_ONCE(). Changing this to WARN() shows, that this is
      happening quite frequently (up to once a second).
      
      Since the eMMC 5.1 specification, where CQE and CQHCI are specified,
      does not mention that spurious TCN interrupts for DCMDs can be simply
      ignored, we must assume that using this feature is not working reliably.
      
      The current implementation uses DCMD for REQ_OP_FLUSH only, and
      I could not see any performance/power impact when disabling
      this optional feature for RK3399.
      
      Therefore this patch disables DCMDs for RK3399.
      
      Signed-off-by: default avatarChristoph Muellner <christoph.muellner@theobroma-systems.com>
      Signed-off-by: default avatarPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>
      Fixes: 84362d79
      
       ("mmc: sdhci-of-arasan: Add CQHCI support for arasan,sdhci-5.1")
      Cc: stable@vger.kernel.org
      [the corresponding code changes are queued for 5.2 so doing that as well]
      Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
      a3eec13b
  2. Mar 18, 2019
  3. Jan 31, 2019
  4. Dec 06, 2018
  5. Nov 19, 2018
    • Viresh Kumar's avatar
      arm64: dts: rockchip: Add all CPUs in cooling maps · cdd46460
      Viresh Kumar authored
      
      
      Each CPU can (and does) participate in cooling down the system but the
      DT only captures a handful of them, normally CPU0, in the cooling maps.
      Things work by chance currently as under normal circumstances its the
      first CPU of each cluster which is used by the operating systems to
      probe the cooling devices. But as soon as this CPU ordering changes and
      any other CPU is used to bring up the cooling device, we will start
      seeing failures.
      
      Also the DT is rather incomplete when we list only one CPU in the
      cooling maps, as the hardware doesn't have any such limitations.
      
      Update cooling maps to include all devices affected by individual trip
      points.
      
      Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
      cdd46460
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