We can assume the caller is holding a blanket forcewake for the
register writes during resume, and so we can skip taking individual
locks around each write inside execlists resume.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c
b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 953b3938a85f..94caf0f58fef 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2076,22 +2076,23 @@ static int intel_init_workaround_bb(struct
intel_engine_cs *engine)
static void enable_execlists(struct intel_engine_cs *engine)
{
+ u32 mode;
+
+ assert_forcewakes_active(engine->uncore, FORCEWAKE_ALL);
+
intel_engine_set_hwsp_writemask(engine, ~0u); /* HWSTAM */
if (INTEL_GEN(engine->i915) >= 11)
- ENGINE_WRITE(engine,
- RING_MODE_GEN7,
- _MASKED_BIT_ENABLE(GEN11_GFX_DISABLE_LEGACY_MODE));
+ mode = _MASKED_BIT_ENABLE(GEN11_GFX_DISABLE_LEGACY_MODE);
else
- ENGINE_WRITE(engine,
- RING_MODE_GEN7,
- _MASKED_BIT_ENABLE(GFX_RUN_LIST_ENABLE));
+ mode =_MASKED_BIT_ENABLE(GFX_RUN_LIST_ENABLE);
+ ENGINE_WRITE_FW(engine, RING_MODE_GEN7, mode);
- ENGINE_WRITE(engine, RING_MI_MODE, _MASKED_BIT_DISABLE(STOP_RING));
+ ENGINE_WRITE_FW(engine, RING_MI_MODE, _MASKED_BIT_DISABLE(STOP_RING));
- ENGINE_WRITE(engine,
- RING_HWS_PGA,
- i915_ggtt_offset(engine->status_page.vma));
+ ENGINE_WRITE_FW(engine,
+ RING_HWS_PGA,
+ i915_ggtt_offset(engine->status_page.vma));
ENGINE_POSTING_READ(engine, RING_HWS_PGA);
}
@@ -2099,7 +2100,7 @@ static bool unexpected_starting_state(struct
intel_engine_cs *engine)
{
bool unexpected = false;
- if (ENGINE_READ(engine, RING_MI_MODE) & STOP_RING) {
+ if (ENGINE_READ_FW(engine, RING_MI_MODE) & STOP_RING) {
DRM_DEBUG_DRIVER("STOP_RING still set in RING_MI_MODE\n");
unexpected = true;
}
--
2.20.1
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