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i965: read CS timestamp frequency from the kernel on Gen10+

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We cannot figure this value out of the PCI-id anymore. Let's read it
from the kernel (which computes this from a few registers).

When running on a (upcoming) 4.16-rc1+ kernel, this will fixes piglit
tests on CNL :

    spec@arb_timer_query@query gl_timestamp
    spec@arb_timer_query@timestamp-get
    spec@ext_timer_query@time-elapsed

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
This commit is contained in:
Lionel Landwerlin 2017-11-06 11:11:42 +00:00
parent aa8a2a8670
commit b66e4b51bf
1 changed files with 24 additions and 0 deletions
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24
src/mesa/drivers/dri/i965/intel_screen.c
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@ -1685,6 +1685,27 @@ intelDestroyBuffer(__DRIdrawable * driDrawPriv)
_mesa_reference_framebuffer(&fb, NULL); _mesa_reference_framebuffer(&fb, NULL);
} }
static void
intel_cs_timestamp_frequency(struct intel_screen *screen)
{
/* We shouldn't need to update gen_device_info.timestamp_frequency prior to
* gen10, PCI-id is enough to figure it out.
*/
assert(screen->devinfo.gen >= 10);
int ret, freq;
ret = intel_get_param(screen, I915_PARAM_CS_TIMESTAMP_FREQUENCY,
&freq);
if (ret < 0) {
_mesa_warning(NULL,
"Kernel 4.15 required to read the CS timestamp frequency.\n");
return;
}
screen->devinfo.timestamp_frequency = freq;
}
static void static void
intel_detect_sseu(struct intel_screen *screen) intel_detect_sseu(struct intel_screen *screen)
{ {
@ -2405,6 +2426,9 @@ __DRIconfig **intelInitScreen2(__DRIscreen *dri_screen)
isl_device_init(&screen->isl_dev, &screen->devinfo, isl_device_init(&screen->isl_dev, &screen->devinfo,
screen->hw_has_swizzling); screen->hw_has_swizzling);
if (devinfo->gen >= 10)
intel_cs_timestamp_frequency(screen);
/* GENs prior to 8 do not support EU/Subslice info */ /* GENs prior to 8 do not support EU/Subslice info */
if (devinfo->gen >= 8) { if (devinfo->gen >= 8) {
intel_detect_sseu(screen); intel_detect_sseu(screen);