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drm/i915/fbc: Extract _intel_fbc_cfb_stride()

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Pull the lower level stuff out from intel_fbc_cfb_stride() into
a separate function that doesn't depend on the plane_state.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240705145254.3355-9-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
This commit is contained in:
Ville Syrjälä 2024-07-05 17:52:42 +03:00
parent 9490000038
commit 6a1738b3fd
1 changed files with 14 additions and 8 deletions
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22
drivers/gpu/drm/i915/display/intel_fbc.c
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@ -148,12 +148,11 @@ static unsigned int intel_fbc_plane_cfb_stride(const struct intel_plane_state *p
}
/* minimum acceptable cfb stride in bytes, assuming 1:1 compression limit */
static unsigned int skl_fbc_min_cfb_stride(const struct intel_plane_state *plane_state)
static unsigned int skl_fbc_min_cfb_stride(struct intel_display *display,
unsigned int width)
{
struct intel_display *display = to_intel_display(plane_state->uapi.plane->dev);
unsigned int limit = 4; /* 1:4 compression limit is the worst case */
unsigned int cpp = 4; /* FBC always 4 bytes per pixel */
unsigned int width = drm_rect_width(&plane_state->uapi.src) >> 16;
unsigned int height = 4; /* FBC segment is 4 lines */
unsigned int stride;
@ -178,22 +177,29 @@ static unsigned int skl_fbc_min_cfb_stride(const struct intel_plane_state *plane
}
/* properly aligned cfb stride in bytes, assuming 1:1 compression limit */
static unsigned int intel_fbc_cfb_stride(const struct intel_plane_state *plane_state)
static unsigned int _intel_fbc_cfb_stride(struct intel_display *display,
unsigned int width, unsigned int stride)
{
struct intel_display *display = to_intel_display(plane_state->uapi.plane->dev);
unsigned int stride = intel_fbc_plane_cfb_stride(plane_state);
/*
* At least some of the platforms require each 4 line segment to
* be 512 byte aligned. Aligning each line to 512 bytes guarantees
* that regardless of the compression limit we choose later.
*/
if (DISPLAY_VER(display) >= 9)
return max(ALIGN(stride, 512), skl_fbc_min_cfb_stride(plane_state));
return max(ALIGN(stride, 512), skl_fbc_min_cfb_stride(display, width));
else
return stride;
}
static unsigned int intel_fbc_cfb_stride(const struct intel_plane_state *plane_state)
{
struct intel_display *display = to_intel_display(plane_state->uapi.plane->dev);
unsigned int stride = intel_fbc_plane_cfb_stride(plane_state);
unsigned int width = drm_rect_width(&plane_state->uapi.src) >> 16;
return _intel_fbc_cfb_stride(display, width, stride);
}
static unsigned int intel_fbc_cfb_size(const struct intel_plane_state *plane_state)
{
struct intel_display *display = to_intel_display(plane_state->uapi.plane->dev);