From: Ville Syrjälä <[email protected]> VLV/CHV have similar DSPARB registers as older platforms, just more of them due to more planes. Add a bit of code to read out the current FIFO split from the registers. Will be useful later when we improve the WM calculations.
v2: Add display_mmio_offset to DSPARB Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/i915_reg.h | 5 +++- drivers/gpu/drm/i915/intel_pm.c | 55 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index b35aaf3..3b48f4b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4026,7 +4026,7 @@ enum skl_disp_power_wells { #define DPINVGTT_STATUS_MASK 0xff #define DPINVGTT_STATUS_MASK_CHV 0xfff -#define DSPARB 0x70030 +#define DSPARB (dev_priv->info.display_mmio_offset + 0x70030) #define DSPARB_CSTART_MASK (0x7f << 7) #define DSPARB_CSTART_SHIFT 7 #define DSPARB_BSTART_MASK (0x7f) @@ -4034,6 +4034,9 @@ enum skl_disp_power_wells { #define DSPARB_BEND_SHIFT 9 /* on 855 */ #define DSPARB_AEND_SHIFT 0 +#define DSPARB2 (VLV_DISPLAY_BASE + 0x70060) /* vlv/chv */ +#define DSPARB3 (VLV_DISPLAY_BASE + 0x7006c) /* chv */ + /* pnv/gen4/g4x/vlv/chv */ #define DSPFW1 (dev_priv->info.display_mmio_offset + 0x70034) #define DSPFW_SR_SHIFT 23 diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index fffcf64..e53038e 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -280,6 +280,61 @@ void intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) */ static const int pessimal_latency_ns = 5000; +#define VLV_FIFO_START(dsparb, dsparb2, lo_shift, hi_shift) \ + ((((dsparb) >> (lo_shift)) & 0xff) | ((((dsparb2) >> (hi_shift)) & 0x1) << 8)) + +static int vlv_get_fifo_size(struct drm_device *dev, + enum pipe pipe, int plane) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + int sprite0_start, sprite1_start, size; + + switch (pipe) { + uint32_t dsparb, dsparb2, dsparb3; + case PIPE_A: + dsparb = I915_READ(DSPARB); + dsparb2 = I915_READ(DSPARB2); + sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 0, 0); + sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 8, 4); + break; + case PIPE_B: + dsparb = I915_READ(DSPARB); + dsparb2 = I915_READ(DSPARB2); + sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 16, 8); + sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 24, 12); + break; + case PIPE_C: + dsparb2 = I915_READ(DSPARB2); + dsparb3 = I915_READ(DSPARB3); + sprite0_start = VLV_FIFO_START(dsparb3, dsparb2, 0, 16); + sprite1_start = VLV_FIFO_START(dsparb3, dsparb2, 8, 20); + break; + default: + return 0; + } + + switch (plane) { + case 0: + size = sprite0_start; + break; + case 1: + size = sprite1_start - sprite0_start; + break; + case 2: + size = 512 - 1 - sprite1_start; + break; + default: + return 0; + } + + DRM_DEBUG_KMS("Pipe %c %s %c FIFO size: %d\n", + pipe_name(pipe), plane == 0 ? "primary" : "sprite", + plane == 0 ? plane_name(pipe) : sprite_name(pipe, plane - 1), + size); + + return size; +} + static int i9xx_get_fifo_size(struct drm_device *dev, int plane) { struct drm_i915_private *dev_priv = dev->dev_private; -- 2.0.5 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
