drm/i915/icl: allow the reg_read ioctl to read the RCS TIMESTAMP register

This enables the Mesa driver to advertise support for ARB_timer_query,
and thus an OpenGL version higher than 3.2.

Based on the CNL patch by Nanley Chery.

v2: Rebase.

Cc: Anuj Phogat <anuj.phogat@intel.com>
Cc: Nanley Chery <nanley.g.chery@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Requested-by: Anuj Phogat <anuj.phogat@intel.com>
Tested-by: Anuj Phogat <anuj.phogat@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180130134918.32283-10-paulo.r.zanoni@intel.com

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 94e1fb3..4075010 100644 (file)
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1452,7 +1452,7 @@ static const struct reg_whitelist {
 } reg_read_whitelist[] = { {
        .offset_ldw = RING_TIMESTAMP(RENDER_RING_BASE),
        .offset_udw = RING_TIMESTAMP_UDW(RENDER_RING_BASE),
-       .gen_mask = INTEL_GEN_MASK(4, 10),
+       .gen_mask = INTEL_GEN_MASK(4, 11),
        .size = 8
 } };