Re: [PATCH] gpu: host1x: avoid IOMMU_API build error

[Mikko Perttunen]

On 4.3.2019 21.53, Arnd Bergmann wrote:
drivers/gpu/host1x/hw/channel_hw.c: In function 'host1x_channel_set_streamid':
drivers/gpu/host1x/hw/channel_hw.c:118:30: error: implicit declaration of 
function 'dev_iommu_fwspec_get'; did you mean 'iommu_fwspec_free'? 
[-Werror=implicit-function-declaration]
   struct iommu_fwspec *spec = dev_iommu_fwspec_get(channel->dev->parent);
                               ^~~~~~~~~~~~~~~~~~~~
                               iommu_fwspec_free
drivers/gpu/host1x/hw/channel_hw.c:118:30: error: initialization of 'struct 
iommu_fwspec *' from 'int' makes pointer from integer without a cast 
[-Werror=int-conversion]
drivers/gpu/host1x/hw/channel_hw.c:119:23: error: 'struct iommu_fwspec' has no 
member named 'ids'
   u32 sid = spec ? spec->ids[0] & 0xffff : 0x7f;
                        ^~
cc1: all warnings being treated as errors
Fixes: de5469c21ff9 ("gpu: host1x: Program the channel stream ID")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
---
  drivers/gpu/host1x/hw/channel_hw.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/host1x/hw/channel_hw.c 
b/drivers/gpu/host1x/hw/channel_hw.c
index 27101c04a827..738dccf4ee3f 100644
--- a/drivers/gpu/host1x/hw/channel_hw.c
+++ b/drivers/gpu/host1x/hw/channel_hw.c
@@ -114,7 +114,7 @@ static inline void synchronize_syncpt_base(struct 
host1x_job *job)
  
  static void host1x_channel_set_streamid(struct host1x_channel *channel)
  {
-#if HOST1X_HW >= 6
+#if HOST1X_HW >= 6 && defined(CONFIG_IOMMU_API)
        struct iommu_fwspec *spec = dev_iommu_fwspec_get(channel->dev->parent);
        u32 sid = spec ? spec->ids[0] & 0xffff : 0x7f;
  


We should always program the stream ID - if IOMMU API is not enabled 
then 0x7f (SMMU bypass) should always be programmed.

Mikko