drm/i915/tgl: 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 ICL patch by Paulo Zanoni and CNL patch by Nanley Chery.

Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190726002412.5827-3-lucas.demarchi@intel.com

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 475ab3d..2b839ac 100644 (file)
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1776,7 +1776,7 @@ 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, 11),
+       .gen_mask = INTEL_GEN_MASK(4, 12),
        .size = 8
 } };