From: Imre Deak Date: Wed, 4 Nov 2015 17:24:16 +0000 (+0200) Subject: drm/i915/gen9: simplify DC toggling code X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=13ae3a0d5b139aded05b1f071bb147ce99d6299b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915/gen9: simplify DC toggling code Signed-off-by: Imre Deak Reviewed-by: Patrik Jakobsson [fix line over 80 chars checkpatch WARN in gen9_set_dc_state() (imre)] Link: http://patchwork.freedesktop.org/patch/msgid/1446657859-9598-8-git-send-email-imre.deak@intel.com --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 8e13f41682b4..89018bab5ebd 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7495,6 +7495,7 @@ enum skl_disp_power_wells { /* GEN9 DC */ #define DC_STATE_EN 0x45504 +#define DC_STATE_DISABLE 0 #define DC_STATE_EN_UPTO_DC5 (1<<0) #define DC_STATE_EN_DC9 (1<<3) #define DC_STATE_EN_UPTO_DC6 (2<<0) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 9b3afad4f7e8..698a5339b168 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -400,32 +400,44 @@ static void assert_can_disable_dc9(struct drm_i915_private *dev_priv) */ } -void bxt_enable_dc9(struct drm_i915_private *dev_priv) +static void gen9_set_dc_state(struct drm_i915_private *dev_priv, uint32_t state) { uint32_t val; + uint32_t mask; - assert_can_enable_dc9(dev_priv); + mask = DC_STATE_EN_UPTO_DC5; + if (IS_BROXTON(dev_priv)) + mask |= DC_STATE_EN_DC9; + else + mask |= DC_STATE_EN_UPTO_DC6; - DRM_DEBUG_KMS("Enabling DC9\n"); + WARN_ON_ONCE(state & ~mask); val = I915_READ(DC_STATE_EN); - val |= DC_STATE_EN_DC9; + DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n", + val & mask, state); + val &= ~mask; + val |= state; I915_WRITE(DC_STATE_EN, val); POSTING_READ(DC_STATE_EN); } -void bxt_disable_dc9(struct drm_i915_private *dev_priv) +void bxt_enable_dc9(struct drm_i915_private *dev_priv) { - uint32_t val; + assert_can_enable_dc9(dev_priv); + + DRM_DEBUG_KMS("Enabling DC9\n"); + gen9_set_dc_state(dev_priv, DC_STATE_EN_DC9); +} + +void bxt_disable_dc9(struct drm_i915_private *dev_priv) +{ assert_can_disable_dc9(dev_priv); DRM_DEBUG_KMS("Disabling DC9\n"); - val = I915_READ(DC_STATE_EN); - val &= ~DC_STATE_EN_DC9; - I915_WRITE(DC_STATE_EN, val); - POSTING_READ(DC_STATE_EN); + gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); } static void gen9_set_dc_state_debugmask_memory_up( @@ -486,33 +498,22 @@ static void assert_can_disable_dc5(struct drm_i915_private *dev_priv) static void gen9_enable_dc5(struct drm_i915_private *dev_priv) { - uint32_t val; - assert_can_enable_dc5(dev_priv); DRM_DEBUG_KMS("Enabling DC5\n"); gen9_set_dc_state_debugmask_memory_up(dev_priv); - val = I915_READ(DC_STATE_EN); - val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK; - val |= DC_STATE_EN_UPTO_DC5; - I915_WRITE(DC_STATE_EN, val); - POSTING_READ(DC_STATE_EN); + gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC5); } static void gen9_disable_dc5(struct drm_i915_private *dev_priv) { - uint32_t val; - assert_can_disable_dc5(dev_priv); DRM_DEBUG_KMS("Disabling DC5\n"); - val = I915_READ(DC_STATE_EN); - val &= ~DC_STATE_EN_UPTO_DC5; - I915_WRITE(DC_STATE_EN, val); - POSTING_READ(DC_STATE_EN); + gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); } static void assert_can_enable_dc6(struct drm_i915_private *dev_priv) @@ -544,33 +545,23 @@ static void assert_can_disable_dc6(struct drm_i915_private *dev_priv) void skl_enable_dc6(struct drm_i915_private *dev_priv) { - uint32_t val; - assert_can_enable_dc6(dev_priv); DRM_DEBUG_KMS("Enabling DC6\n"); gen9_set_dc_state_debugmask_memory_up(dev_priv); - val = I915_READ(DC_STATE_EN); - val &= ~DC_STATE_EN_UPTO_DC5_DC6_MASK; - val |= DC_STATE_EN_UPTO_DC6; - I915_WRITE(DC_STATE_EN, val); - POSTING_READ(DC_STATE_EN); + gen9_set_dc_state(dev_priv, DC_STATE_EN_UPTO_DC6); + } void skl_disable_dc6(struct drm_i915_private *dev_priv) { - uint32_t val; - assert_can_disable_dc6(dev_priv); DRM_DEBUG_KMS("Disabling DC6\n"); - val = I915_READ(DC_STATE_EN); - val &= ~DC_STATE_EN_UPTO_DC6; - I915_WRITE(DC_STATE_EN, val); - POSTING_READ(DC_STATE_EN); + gen9_set_dc_state(dev_priv, DC_STATE_DISABLE); } static void skl_set_power_well(struct drm_i915_private *dev_priv,