Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-09-20 06:53:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915/fbc: Extract intel_fbc_cfb_cpp()

Browse Source 
Extract a helper to determine the CFB bytes per pixel value.
Currently this is always 4, but that could change in the
future.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240705145254.3355-14-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
This commit is contained in:
Ville Syrjälä 2024-07-05 17:52:47 +03:00
parent 4d72202993
commit d43caea1fa
1 changed files with 12 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/gpu/drm/i915/display/intel_fbc.c
View File

@ -139,20 +139,24 @@ static unsigned int intel_fbc_plane_stride(const struct intel_plane_state *plane
return stride;
}
static unsigned int intel_fbc_cfb_cpp(void)
{
return 4; /* FBC always 4 bytes per pixel */
}
/* plane stride based cfb stride in bytes, assuming 1:1 compression limit */
static unsigned int intel_fbc_plane_cfb_stride(const struct intel_plane_state *plane_state)
{
unsigned int cpp = 4; /* FBC always 4 bytes per pixel */
unsigned int cpp = intel_fbc_cfb_cpp();
return intel_fbc_plane_stride(plane_state) * cpp;
}
/* minimum acceptable cfb stride in bytes, assuming 1:1 compression limit */
static unsigned int skl_fbc_min_cfb_stride(struct intel_display *display,
unsigned int width)
unsigned int cpp, unsigned int width)
{
unsigned int limit = 4; /* 1:4 compression limit is the worst case */
unsigned int cpp = 4; /* FBC always 4 bytes per pixel */
unsigned int height = 4; /* FBC segment is 4 lines */
unsigned int stride;
@ -178,7 +182,8 @@ static unsigned int skl_fbc_min_cfb_stride(struct intel_display *display,
/* properly aligned cfb stride in bytes, assuming 1:1 compression limit */
static unsigned int _intel_fbc_cfb_stride(struct intel_display *display,
unsigned int width, unsigned int stride)
unsigned int cpp, unsigned int width,
unsigned int stride)
{
/*
* At least some of the platforms require each 4 line segment to
@ -186,7 +191,7 @@ static unsigned int _intel_fbc_cfb_stride(struct intel_display *display,
* that regardless of the compression limit we choose later.
*/
if (DISPLAY_VER(display) >= 9)
return max(ALIGN(stride, 512), skl_fbc_min_cfb_stride(display, width));
return max(ALIGN(stride, 512), skl_fbc_min_cfb_stride(display, cpp, width));
else
return stride;
}
@ -196,8 +201,9 @@ static unsigned int intel_fbc_cfb_stride(const struct intel_plane_state *plane_s
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;
unsigned int cpp = intel_fbc_cfb_cpp();
return _intel_fbc_cfb_stride(display, width, stride);
return _intel_fbc_cfb_stride(display, cpp, width, stride);
}
/*