From: Lionel Landwerlin Date: Mon, 4 Dec 2017 15:22:12 +0000 (+0000) Subject: anv: query CS timestamp frequency from the kernel X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2ead8f1690823bbb1acb8102bb6ceee26e8574b1;p=mesa.git 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 Reviewed-by: Rafael Antognolli --- diff --git a/src/intel/vulkan/anv_device.c b/src/intel/vulkan/anv_device.c index 258668fa0b0..97124154b69 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);