From: Imre Deak Date: Mon, 10 Feb 2014 16:42:48 +0000 (+0200) Subject: drm/i915: vlv: fix mapping of pipestat enable to status bits X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=10c59c511101bb0726967c9f3a297c83f1b4203d;p=linux-beck.git drm/i915: vlv: fix mapping of pipestat enable to status bits At least on VLV we can't get at the pipestat status bits by simply right shifting the corresponding enable bits. The mapping between enable and status bits for the sprite0,1 flip done and the PSR events don't follow this rule, so we need to map them separately. The PSR enable for pipe A is DPFLIPSTAT[22], but I haven't added support for this, since there is no user of it atm. Until support is added WARN if someone tries to enable PSR interrupts, or tries to enable the same (1 << 6) bit on pipe B, which MBZ. v2: - inline the status->enable mask mapping (Ville) - fix bogus use of status bits in enable mask (Ville) Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index cdb158d1bfde..c9540dca5d23 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -515,13 +515,39 @@ __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe, POSTING_READ(reg); } +static u32 vlv_get_pipestat_enable_mask(struct drm_device *dev, u32 status_mask) +{ + u32 enable_mask = status_mask << 16; + + /* + * On pipe A we don't support the PSR interrupt yet, on pipe B the + * same bit MBZ. + */ + if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV)) + return 0; + + enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS | + SPRITE0_FLIP_DONE_INT_EN_VLV | + SPRITE1_FLIP_DONE_INT_EN_VLV); + if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV) + enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV; + if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV) + enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV; + + return enable_mask; +} + void i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe, u32 status_mask) { u32 enable_mask; - enable_mask = status_mask << 16; + if (IS_VALLEYVIEW(dev_priv->dev)) + enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev, + status_mask); + else + enable_mask = status_mask << 16; __i915_enable_pipestat(dev_priv, pipe, enable_mask, status_mask); } @@ -531,7 +557,11 @@ i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe, { u32 enable_mask; - enable_mask = status_mask << 16; + if (IS_VALLEYVIEW(dev_priv->dev)) + enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev, + status_mask); + else + enable_mask = status_mask << 16; __i915_disable_pipestat(dev_priv, pipe, enable_mask, status_mask); } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 6f021ff6106d..fefffec2c573 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3254,6 +3254,7 @@ #define PIPE_LEGACY_BLC_EVENT_ENABLE (1UL<<22) #define PIPE_ODD_FIELD_INTERRUPT_ENABLE (1UL<<21) #define PIPE_EVEN_FIELD_INTERRUPT_ENABLE (1UL<<20) +#define PIPE_B_PSR_INTERRUPT_ENABLE_VLV (1UL<<19) #define PIPE_HOTPLUG_TV_INTERRUPT_ENABLE (1UL<<18) /* pre-965 */ #define PIPE_START_VBLANK_INTERRUPT_ENABLE (1UL<<18) /* 965 or later */ #define PIPE_VBLANK_INTERRUPT_ENABLE (1UL<<17) @@ -3270,8 +3271,10 @@ #define PIPE_DISPLAY_LINE_COMPARE_STATUS (1UL<<8) #define PIPE_DPST_EVENT_STATUS (1UL<<7) #define PIPE_LEGACY_BLC_EVENT_STATUS (1UL<<6) +#define PIPE_A_PSR_STATUS_VLV (1UL<<6) #define PIPE_ODD_FIELD_INTERRUPT_STATUS (1UL<<5) #define PIPE_EVEN_FIELD_INTERRUPT_STATUS (1UL<<4) +#define PIPE_B_PSR_STATUS_VLV (1UL<<3) #define PIPE_HOTPLUG_TV_INTERRUPT_STATUS (1UL<<2) /* pre-965 */ #define PIPE_START_VBLANK_INTERRUPT_STATUS (1UL<<2) /* 965 or later */ #define PIPE_VBLANK_INTERRUPT_STATUS (1UL<<1)