6.1-stable review patch. If anyone has any objections, please let me know.
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From: Ville Syrjälä ville.syrjala@linux.intel.com
commit 0ccd963fe555451b1f84e6d14d2b3ef03dd5c947 upstream.
On ADL+ the hardware automagically calculates the CCS AUX surface stride from the main surface stride, so when remapping we can't really play a lot of tricks with the main surface stride, or else the AUX surface stride would get miscalculated and no longer match the actual data layout in memory.
Supposedly we could remap in 256 main surface tile units (AUX page(4096)/cachline(64)*4(4x1 main surface tiles per AUX cacheline)=256 main surface tiles), but the extra complexity is probably not worth the hassle.
So let's just make sure our mapping stride is calculated from the full framebuffer stride (instead of the framebuffer width). This way the stride we program into PLANE_STRIDE will be the original framebuffer stride, and thus there will be no change to the AUX stride/layout.
Cc: stable@vger.kernel.org Cc: Imre Deak imre.deak@intel.com Cc: Juha-Pekka Heikkila juhapekka.heikkila@gmail.com Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20231205180308.7505-1-ville.sy... Reviewed-by: Imre Deak imre.deak@intel.com (cherry picked from commit 2c12eb36f849256f5eb00ffaee9bf99396fd3814) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/display/intel_fb.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/display/intel_fb.c +++ b/drivers/gpu/drm/i915/display/intel_fb.c @@ -1441,8 +1441,20 @@ static u32 calc_plane_remap_info(const s
size += remap_info->size; } else { - unsigned int dst_stride = plane_view_dst_stride_tiles(fb, color_plane, - remap_info->width); + unsigned int dst_stride; + + /* + * The hardware automagically calculates the CCS AUX surface + * stride from the main surface stride so can't really remap a + * smaller subset (unless we'd remap in whole AUX page units). + */ + if (intel_fb_needs_pot_stride_remap(fb) && + intel_fb_is_ccs_modifier(fb->base.modifier)) + dst_stride = remap_info->src_stride; + else + dst_stride = remap_info->width; + + dst_stride = plane_view_dst_stride_tiles(fb, color_plane, dst_stride);
assign_chk_ovf(i915, remap_info->dst_stride, dst_stride); color_plane_info->mapping_stride = dst_stride *