Cores need to be included into the debug mask. We don't exactly know what it does but the spec says it must be enabled. So obey. Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_runtime_pm.c | 14 ++++++++------ 2 files changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3774870477c1..f76cbf3e5d1e 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7568,6 +7568,7 @@ enum skl_disp_power_wells { #define DC_STATE_EN_UPTO_DC5_DC6_MASK 0x3 #define DC_STATE_DEBUG _MMIO(0x45520) +#define DC_STATE_DEBUG_MASK_CORES (1<<0) #define DC_STATE_DEBUG_MASK_MEMORY_UP (1<<1) /* Please see hsw_read_dcomp() and hsw_write_dcomp() before using this register, diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index cb91540cfbad..1b490c7e4020 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -456,15 +456,17 @@ static void assert_can_disable_dc9(struct drm_i915_private *dev_priv) */ } -static void gen9_set_dc_state_debugmask_memory_up( - struct drm_i915_private *dev_priv) +static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv) { - uint32_t val; + uint32_t val, mask; + + mask = DC_STATE_DEBUG_MASK_MEMORY_UP | + DC_STATE_DEBUG_MASK_CORES; /* The below bit doesn't need to be cleared ever afterwards */ val = I915_READ(DC_STATE_DEBUG); - if (!(val & DC_STATE_DEBUG_MASK_MEMORY_UP)) { - val |= DC_STATE_DEBUG_MASK_MEMORY_UP; + if ((val & mask) != mask) { + val |= mask; I915_WRITE(DC_STATE_DEBUG, val); POSTING_READ(DC_STATE_DEBUG); } @@ -525,7 +527,7 @@ static void gen9_set_dc_state(struct drm_i915_private *dev_priv, uint32_t state) state = DC_STATE_EN_UPTO_DC5; if (state & DC_STATE_EN_UPTO_DC5_DC6_MASK) - gen9_set_dc_state_debugmask_memory_up(dev_priv); + gen9_set_dc_state_debugmask(dev_priv); val = I915_READ(DC_STATE_EN); DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n", -- 2.5.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx