From: "Kumar, Mahesh" <mahesh1.ku...@intel.com>
This patch make changes to calculate adjusted plane pixel rate &
plane downscale amount using fixed_point functions available.
This patch will give uniformity in code, & will help to avoid mixing of
32bit uint32_t variable for fixed-16.16 with fixed_16_16_t variables in
later patch in the series.
Changes from V1:
- Rebase based on wrapper name change
- Remove unnecessary comment
Signed-off-by: Mahesh Kumar <mahesh1.ku...@intel.com>
Reviewed-by: Matt Roper <matthew.d.ro...@intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 38 +++++++++++++++++++-------------------
1 file changed, 19 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 8ff8cc59dcca..ab056952cfa4 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3827,26 +3827,27 @@ void skl_ddb_get_hw_state(struct drm_i915_private
*dev_priv,
* Return value is provided in 16.16 fixed point form to retain fractional
part.
* Caller should take care of dividing & rounding off the value.
*/
-static uint32_t
+static uint_fixed_16_16_t
skl_plane_downscale_amount(const struct intel_crtc_state *cstate,
const struct intel_plane_state *pstate)
{
struct intel_plane *plane = to_intel_plane(pstate->base.plane);
- uint32_t downscale_h, downscale_w;
uint32_t src_w, src_h, dst_w, dst_h;
+ uint_fixed_16_16_t fp_w_ratio, fp_h_ratio;
+ uint_fixed_16_16_t downscale_h, downscale_w;
if (WARN_ON(!intel_wm_plane_visible(cstate, pstate)))
- return DRM_PLANE_HELPER_NO_SCALING;
+ return u32_to_fixed_16_16(0);
/* n.b., src is 16.16 fixed point, dst is whole integer */
if (plane->id == PLANE_CURSOR) {
- src_w = pstate->base.src_w;
- src_h = pstate->base.src_h;
+ src_w = pstate->base.src_w >> 16;
+ src_h = pstate->base.src_h >> 16;
dst_w = pstate->base.crtc_w;
dst_h = pstate->base.crtc_h;
} else {
- src_w = drm_rect_width(&pstate->base.src);
- src_h = drm_rect_height(&pstate->base.src);
+ src_w = drm_rect_width(&pstate->base.src) >> 16;
+ src_h = drm_rect_height(&pstate->base.src) >> 16;
dst_w = drm_rect_width(&pstate->base.dst);
dst_h = drm_rect_height(&pstate->base.dst);
}
@@ -3854,11 +3855,12 @@ skl_plane_downscale_amount(const struct
intel_crtc_state *cstate,
if (drm_rotation_90_or_270(pstate->base.rotation))
swap(dst_w, dst_h);
- downscale_h = max(src_h / dst_h, (uint32_t)DRM_PLANE_HELPER_NO_SCALING);
- downscale_w = max(src_w / dst_w, (uint32_t)DRM_PLANE_HELPER_NO_SCALING);
+ fp_w_ratio = fixed_16_16_div(src_w, dst_w);
+ fp_h_ratio = fixed_16_16_div(src_h, dst_h);
+ downscale_w = max_fixed_16_16(fp_w_ratio, u32_to_fixed_16_16(1));
+ downscale_h = max_fixed_16_16(fp_h_ratio, u32_to_fixed_16_16(1));
- /* Provide result in 16.16 fixed point */
- return (uint64_t)downscale_w * downscale_h >> 16;
+ return mul_fixed16(downscale_w, downscale_h);
}
static unsigned int
@@ -3868,10 +3870,11 @@ skl_plane_relative_data_rate(const struct
intel_crtc_state *cstate,
{
struct intel_plane *plane = to_intel_plane(pstate->plane);
struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate);
- uint32_t down_scale_amount, data_rate;
+ uint32_t data_rate;
uint32_t width = 0, height = 0;
struct drm_framebuffer *fb;
u32 format;
+ uint_fixed_16_16_t down_scale_amount;
if (!intel_pstate->base.visible)
return 0;
@@ -3905,7 +3908,7 @@ skl_plane_relative_data_rate(const struct
intel_crtc_state *cstate,
down_scale_amount = skl_plane_downscale_amount(cstate, intel_pstate);
- return (uint64_t)data_rate * down_scale_amount >> 16;
+ return mul_round_up_u32_fixed16(data_rate, down_scale_amount);
}
/*
@@ -4191,8 +4194,7 @@ static uint32_t skl_adjusted_plane_pixel_rate(const
struct intel_crtc_state *cst
struct intel_plane_state *pstate)
{
uint64_t adjusted_pixel_rate;
- uint64_t downscale_amount;
- uint64_t pixel_rate;
+ uint_fixed_16_16_t downscale_amount;
/* Shouldn't reach here on disabled planes... */
if (WARN_ON(!intel_wm_plane_visible(cstate, pstate)))
@@ -4205,10 +4207,8 @@ static uint32_t skl_adjusted_plane_pixel_rate(const
struct intel_crtc_state *cst
adjusted_pixel_rate = cstate->pixel_rate;
downscale_amount = skl_plane_downscale_amount(cstate, pstate);
- pixel_rate = adjusted_pixel_rate * downscale_amount >> 16;
- WARN_ON(pixel_rate != clamp_t(uint32_t, pixel_rate, 0, ~0));
-
- return pixel_rate;
+ return mul_round_up_u32_fixed16(adjusted_pixel_rate,
+ downscale_amount);
}
static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
--
2.11.0
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