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drm/i915:gen9: implement WaMediaPoolStateCmdInWABB 

This patch applies WaMediaPoolStateCmdInWABB which fixes
a problem with the restoration of thread counts on resuming
from RC6.

References: HSD#2137167
Signed-off-by: Tim Gore <tim.gore@intel.com>
Reviewed-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467709290-5941-1-git-send-email-tim.gore@intel.com
This commit is contained in:
Tim Gore 2016-07-05 10:01:30 +01:00 committed by Tvrtko Ursulin
parent e25148d01d
commit 3485d99e41
1 changed files with 25 additions and 0 deletions
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25
drivers/gpu/drm/i915/intel_lrc.c
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@ -1296,6 +1296,31 @@ static int gen9_init_indirectctx_bb(struct intel_engine_cs *engine,
wa_ctx_emit(batch, index, 0);
wa_ctx_emit(batch, index, 0);
}
/* WaMediaPoolStateCmdInWABB:bxt */
if (HAS_POOLED_EU(engine->i915)) {
/*
* EU pool configuration is setup along with golden context
* during context initialization. This value depends on
* device type (2x6 or 3x6) and needs to be updated based
* on which subslice is disabled especially for 2x6
* devices, however it is safe to load default
* configuration of 3x6 device instead of masking off
* corresponding bits because HW ignores bits of a disabled
* subslice and drops down to appropriate config. Please
* see render_state_setup() in i915_gem_render_state.c for
* possible configurations, to avoid duplication they are
* not shown here again.
*/
u32 eu_pool_config = 0x00777000;
wa_ctx_emit(batch, index, GEN9_MEDIA_POOL_STATE);
wa_ctx_emit(batch, index, GEN9_MEDIA_POOL_ENABLE);
wa_ctx_emit(batch, index, eu_pool_config);
wa_ctx_emit(batch, index, 0);
wa_ctx_emit(batch, index, 0);
wa_ctx_emit(batch, index, 0);
}
/* Pad to end of cacheline */
while (index % CACHELINE_DWORDS)
wa_ctx_emit(batch, index, MI_NOOP);