Module: Mesa Branch: master Commit: 2ead8f1690823bbb1acb8102bb6ceee26e8574b1 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=2ead8f1690823bbb1acb8102bb6ceee26e8574b1
Author: Lionel Landwerlin <[email protected]> Date: Mon Dec 4 15:22:12 2017 +0000 anv: query CS timestamp frequency from the kernel The reference value in gen_device_info isn't going to be acurate on Gen10+. We should query it from the kernel, which reads a couple of register to compute the actual value. Signed-off-by: Lionel Landwerlin <[email protected]> Reviewed-by: Rafael Antognolli <[email protected]> --- src/intel/vulkan/anv_device.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c index 258668fa0b..97124154b6 100644 --- a/src/intel/vulkan/anv_device.c +++ b/src/intel/vulkan/anv_device.c @@ -371,6 +371,19 @@ anv_physical_device_init(struct anv_physical_device *device, bool swizzled = anv_gem_get_bit6_swizzle(fd, I915_TILING_X); + /* Starting with Gen10, the timestamp frequency of the command streamer may + * vary from one part to another. We can query the value from the kernel. + */ + if (device->info.gen >= 10) { + int timestamp_frequency = + anv_gem_get_param(fd, I915_PARAM_CS_TIMESTAMP_FREQUENCY); + + if (timestamp_frequency < 0) + intel_logw("Kernel 4.16-rc1+ required to properly query CS timestamp frequency"); + else + device->info.timestamp_frequency = timestamp_frequency; + } + /* GENs prior to 8 do not support EU/Subslice info */ if (device->info.gen >= 8) { device->subslice_total = anv_gem_get_param(fd, I915_PARAM_SUBSLICE_TOTAL); _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
