From b3de1d0789197935da054e47952694adc8219203 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Mon, 24 May 2021 20:27:01 +0300 Subject: [PATCH] drm/i915/adlp: Require DPT FB CCS color planes to be 2MB aligned MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit All DPT FB color plane surface base addresses must be 2MB aligned. On ADL_P this means that the offsets in CCS FB object must be also 2MB aligned. Adjusting unaligned offsets for these FBs during commit time (compensating with the x/y offsets) doesn't work, since the big alignment would most probably lead to an x/y offset mismatch error between the main and CCS planes. We can overcome this limitation by remapping CCS FBs, so that each color plane is at an aligned offset, leaving x/y for each plane unadjusted during commit and so not causing an x/y mismatch error. However remapping for CCS FBs will be done as a follow-up, so for now require that user space allocates the FB obj with properly aligned planes. v2: s/SZ_2M/512*4k/ for clarity. (Ville) Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20210524172703.2113058-1-imre.deak@intel.com --- drivers/gpu/drm/i915/display/intel_fb.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c index a005c68..c60a81a 100644 --- a/drivers/gpu/drm/i915/display/intel_fb.c +++ b/drivers/gpu/drm/i915/display/intel_fb.c @@ -355,8 +355,17 @@ static int intel_fb_offset_to_xy(int *x, int *y, unsigned int height; u32 alignment; - if (DISPLAY_VER(i915) >= 12 && - is_semiplanar_uv_plane(fb, color_plane)) + /* + * All DPT color planes must be 512*4k aligned (the amount mapped by a + * single DPT page). For ADL_P CCS FBs this only works by requiring + * the allocated offsets to be 2MB aligned. Once supoort to remap + * such FBs is added we can remove this requirement, as then all the + * planes can be remapped to an aligned offset. + */ + if (IS_ALDERLAKE_P(i915) && is_ccs_modifier(fb->modifier)) + alignment = 512 * 4096; + else if (DISPLAY_VER(i915) >= 12 && + is_semiplanar_uv_plane(fb, color_plane)) alignment = intel_tile_row_size(fb, color_plane); else if (fb->modifier != DRM_FORMAT_MOD_LINEAR) alignment = intel_tile_size(i915); -- 2.7.4