From nobody Fri Dec 19 20:53:14 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 72577288C09 for ; Fri, 6 Jun 2025 12:06:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749211608; cv=none; b=pnqvIc3Py6GZXVMreFwuTwEA34ADjzFlJPs6vg9oDHvW3alONILcqhiUkfg1pRRiUN5eKuZy9G2KznJRkpB6NSkxJ/NCHYCpT1eHL2S3N3etS+mNgLNgUgJSKiKo1/iPQjI1KEBGsszSA4yRMEGoHb74NlUDv0F6rTJ4nSVu2CY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749211608; c=relaxed/simple; bh=j+cODd6m/VlELnGDpwFpT8ZEc30hawiI2g94AmUkhcU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=H8tXVC8kvOgHXoUOtUi6Y0GTFeVWigfgkarurnaFxes7xPAnAOUViZujT/eeRyWnQ6W7mXtQvM7nMHMa+3g6c5wQ+V7sDfeo1MGOpPPcEqcihdnaSa3bx0K7Kxs2BJNbsIbD83UUeApfR3Uj6ZWevkmsUE5CUSM37K368k183ks= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=bFbAPOFE; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="bFbAPOFE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1749211605; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=04LRSvqeoLp7K6hiMt+5nhRqp6hRGXKPyGrTB58OXbY=; b=bFbAPOFE97xQ8TUXm380kzsXyoSlrfpj/FdfUaL/k2o2/EaUjbMjxKUkzu7ZWMkkhZnRIw VyfqK+cEODza06VnUreFMUVnwTOv+owRg2OxS+5wTE7rjSgqjfZcua4uZEQBpdQ5KaxeVy XfWu2cW4MNokM4uhzt6v20O8H2+GSoU= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-618-tYOC6bZiOBi7uTbL3bbC5A-1; Fri, 06 Jun 2025 08:06:40 -0400 X-MC-Unique: tYOC6bZiOBi7uTbL3bbC5A-1 X-Mimecast-MFC-AGG-ID: tYOC6bZiOBi7uTbL3bbC5A_1749211598 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CF518180036E; Fri, 6 Jun 2025 12:06:37 +0000 (UTC) Received: from hydra.redhat.com (unknown [10.44.33.65]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5F49D18002A5; Fri, 6 Jun 2025 12:06:32 +0000 (UTC) From: Jocelyn Falempe To: Jani Nikula , Rodrigo Vivi , Joonas Lahtinen , Tvrtko Ursulin , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , David Airlie , Simona Vetter , Christian Koenig , Huang Rui , Matthew Auld , Matthew Brost , Maxime Ripard , Thomas Zimmermann , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Jocelyn Falempe Subject: [PATCH v8 7/9] drm/i915/display: Add drm_panic support for Y-tiling with DPT Date: Fri, 6 Jun 2025 13:48:11 +0200 Message-ID: <20250606120519.753928-8-jfalempe@redhat.com> In-Reply-To: <20250606120519.753928-1-jfalempe@redhat.com> References: <20250606120519.753928-1-jfalempe@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Content-Type: text/plain; charset="utf-8" On Alder Lake and later, it's not possible to disable tiling when DPT is enabled. So this commit implements Y-Tiling support, to still be able to draw the panic screen. Signed-off-by: Jocelyn Falempe --- v8: * Pass the tiling function to intel_bo_panic_setup() .../gpu/drm/i915/display/intel_atomic_plane.c | 66 ++++++++++++++++++- drivers/gpu/drm/i915/display/intel_bo.c | 5 +- drivers/gpu/drm/i915/display/intel_bo.h | 3 +- .../drm/i915/display/skl_universal_plane.c | 15 +++-- drivers/gpu/drm/i915/gem/i915_gem_object.h | 3 +- drivers/gpu/drm/i915/gem/i915_gem_pages.c | 21 +++++- drivers/gpu/drm/xe/display/intel_bo.c | 10 ++- 7 files changed, 108 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gp= u/drm/i915/display/intel_atomic_plane.c index 4095d69924db..ce5471bd3c43 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c @@ -1271,6 +1271,31 @@ intel_cleanup_plane_fb(struct drm_plane *plane, intel_plane_unpin_fb(old_plane_state); } =20 +/* Handle Y-tiling, only if DPT is enabled (otherwise disabling tiling is = easier) + * All DPT hardware have 128-bytes width tiling, so Y-tile dimension is 32= x32 + * pixels for 32bits pixels. + */ +#define YTILE_WIDTH 32 +#define YTILE_HEIGHT 32 +#define YTILE_SIZE (YTILE_WIDTH * YTILE_HEIGHT * 4) + +static unsigned int intel_ytile_get_offset(unsigned int width, unsigned in= t x, unsigned int y) +{ + u32 offset; + unsigned int swizzle; + unsigned int width_in_blocks =3D DIV_ROUND_UP(width, 32); + + /* Block offset */ + offset =3D ((y / YTILE_HEIGHT) * width_in_blocks + (x / YTILE_WIDTH)) * Y= TILE_SIZE; + + x =3D x % YTILE_WIDTH; + y =3D y % YTILE_HEIGHT; + + /* bit order inside a block is x4 x3 x2 y4 y3 y2 y1 y0 x1 x0 */ + swizzle =3D (x & 3) | ((y & 0x1f) << 2) | ((x & 0x1c) << 5); + offset +=3D swizzle * 4; + return offset; +} =20 static void intel_panic_flush(struct drm_plane *plane) { @@ -1297,6 +1322,35 @@ static void intel_panic_flush(struct drm_plane *plan= e) iplane->disable_tiling(iplane); } =20 +static unsigned int (*intel_get_tiling_func(u64 fb_modifier))(unsigned int= width, + unsigned int x, + unsigned int y) +{ + switch (fb_modifier) { + case I915_FORMAT_MOD_Y_TILED: + case I915_FORMAT_MOD_Y_TILED_CCS: + case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC: + case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS: + case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS: + return intel_ytile_get_offset; + case I915_FORMAT_MOD_4_TILED: + case I915_FORMAT_MOD_4_TILED_DG2_RC_CCS: + case I915_FORMAT_MOD_4_TILED_DG2_MC_CCS: + case I915_FORMAT_MOD_4_TILED_DG2_RC_CCS_CC: + case I915_FORMAT_MOD_4_TILED_MTL_RC_CCS: + case I915_FORMAT_MOD_4_TILED_MTL_RC_CCS_CC: + case I915_FORMAT_MOD_4_TILED_MTL_MC_CCS: + case I915_FORMAT_MOD_4_TILED_BMG_CCS: + case I915_FORMAT_MOD_4_TILED_LNL_CCS: + case I915_FORMAT_MOD_X_TILED: + case I915_FORMAT_MOD_Yf_TILED: + case I915_FORMAT_MOD_Yf_TILED_CCS: + default: + /* Not supported yet */ + return NULL; + } +} + static int intel_get_scanout_buffer(struct drm_plane *plane, struct drm_scanout_buffer *sb) { @@ -1304,6 +1358,7 @@ static int intel_get_scanout_buffer(struct drm_plane = *plane, struct drm_gem_object *obj; struct drm_framebuffer *fb; struct intel_display *display =3D to_intel_display(plane->dev); + unsigned int (*tiling)(unsigned int width, unsigned int x, unsigned int y= ) =3D NULL; =20 if (!plane->state || !plane->state->fb || !plane->state->visible) return -ENODEV; @@ -1319,9 +1374,14 @@ static int intel_get_scanout_buffer(struct drm_plane= *plane, } else { int ret; /* Can't disable tiling if DPT is in use */ - if (intel_fb_uses_dpt(fb)) - return -EOPNOTSUPP; - ret =3D intel_bo_panic_setup(obj, sb); + if (intel_fb_uses_dpt(fb)) { + if (fb->format->cpp[0] !=3D 4) + return -EOPNOTSUPP; + tiling =3D intel_get_tiling_func(fb->modifier); + if (!tiling) + return -EOPNOTSUPP; + } + ret =3D intel_bo_panic_setup(obj, sb, tiling); if (ret) return ret; } diff --git a/drivers/gpu/drm/i915/display/intel_bo.c b/drivers/gpu/drm/i915= /display/intel_bo.c index 83dbd8ae16fe..16c4ef30133c 100644 --- a/drivers/gpu/drm/i915/display/intel_bo.c +++ b/drivers/gpu/drm/i915/display/intel_bo.c @@ -59,9 +59,10 @@ void intel_bo_describe(struct seq_file *m, struct drm_ge= m_object *obj) i915_debugfs_describe_obj(m, to_intel_bo(obj)); } =20 -int intel_bo_panic_setup(struct drm_gem_object *obj, struct drm_scanout_bu= ffer *sb) +int intel_bo_panic_setup(struct drm_gem_object *obj, struct drm_scanout_bu= ffer *sb, + unsigned int (*tiling)(unsigned int, unsigned int, unsigned int)) { - return i915_gem_object_panic_setup(to_intel_bo(obj), sb); + return i915_gem_object_panic_setup(to_intel_bo(obj), sb, tiling); } =20 void intel_bo_panic_finish(struct drm_gem_object *obj) diff --git a/drivers/gpu/drm/i915/display/intel_bo.h b/drivers/gpu/drm/i915= /display/intel_bo.h index 9ac087ea275d..9eecc18005ae 100644 --- a/drivers/gpu/drm/i915/display/intel_bo.h +++ b/drivers/gpu/drm/i915/display/intel_bo.h @@ -24,7 +24,8 @@ struct intel_frontbuffer *intel_bo_set_frontbuffer(struct= drm_gem_object *obj, struct intel_frontbuffer *front); =20 void intel_bo_describe(struct seq_file *m, struct drm_gem_object *obj); -int intel_bo_panic_setup(struct drm_gem_object *obj, struct drm_scanout_bu= ffer *sb); +int intel_bo_panic_setup(struct drm_gem_object *obj, struct drm_scanout_bu= ffer *sb, + unsigned int (*tiling)(unsigned int, unsigned int, unsigned int)); void intel_bo_panic_finish(struct drm_gem_object *obj); =20 #endif /* __INTEL_BO__ */ diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/g= pu/drm/i915/display/skl_universal_plane.c index ffcf50443c0c..e73f171988f3 100644 --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c @@ -2795,15 +2795,22 @@ static void skl_disable_tiling(struct intel_plane *= plane) { struct intel_plane_state *state =3D to_intel_plane_state(plane->base.stat= e); struct intel_display *display =3D to_intel_display(plane); - u32 stride =3D state->view.color_plane[0].scanout_stride / 64; + const struct drm_framebuffer *fb =3D state->hw.fb; u32 plane_ctl; =20 plane_ctl =3D intel_de_read(display, PLANE_CTL(plane->pipe, plane->id)); - plane_ctl &=3D ~PLANE_CTL_TILED_MASK; =20 - intel_de_write_fw(display, PLANE_STRIDE(plane->pipe, plane->id), - PLANE_STRIDE_(stride)); + if (intel_fb_uses_dpt(fb)) { + /* if DPT is enabled, keep tiling, but disable compression */ + plane_ctl &=3D ~PLANE_CTL_RENDER_DECOMPRESSION_ENABLE; + } else { + /* if DPT is not supported, disable tiling, and update stride */ + u32 stride =3D state->view.color_plane[0].scanout_stride / 64; =20 + plane_ctl &=3D ~PLANE_CTL_TILED_MASK; + intel_de_write_fw(display, PLANE_STRIDE(plane->pipe, plane->id), + PLANE_STRIDE_(stride)); + } intel_de_write_fw(display, PLANE_CTL(plane->pipe, plane->id), plane_ctl); =20 intel_de_write_fw(display, PLANE_SURF(plane->pipe, plane->id), diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i= 915/gem/i915_gem_object.h index 9a0c1019dcad..a9d4e7f93c1f 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_object.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h @@ -692,7 +692,8 @@ i915_gem_object_unpin_pages(struct drm_i915_gem_object = *obj) int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj); int i915_gem_object_truncate(struct drm_i915_gem_object *obj); =20 -int i915_gem_object_panic_setup(struct drm_i915_gem_object *obj, struct dr= m_scanout_buffer *sb); +int i915_gem_object_panic_setup(struct drm_i915_gem_object *obj, struct dr= m_scanout_buffer *sb, + unsigned int (*tiling)(unsigned int, unsigned int, unsigned int)); void i915_gem_object_panic_finish(struct drm_i915_gem_object *obj); =20 /** diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i9= 15/gem/i915_gem_pages.c index 9bdbac3d9433..6a1cc0213ad0 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c @@ -358,6 +358,7 @@ static void *i915_gem_object_map_pfn(struct drm_i915_ge= m_object *obj, static struct page **i915_panic_pages; static int i915_panic_page =3D -1; static void *i915_panic_vaddr; +static unsigned int (*i915_panic_tiling)(unsigned int, unsigned int, unsig= ned int); =20 static void i915_panic_kunmap(void) { @@ -385,6 +386,14 @@ static struct page **i915_gem_object_panic_pages(struc= t drm_i915_gem_object *obj return pages; } =20 +static void i915_gem_object_panic_map_set_pixel(struct drm_scanout_buffer = *sb, unsigned int x, + unsigned int y, u32 color) +{ + unsigned int offset =3D i915_panic_tiling(sb->width, x, y); + + iosys_map_wr(&sb->map[0], offset, u32, color); +} + /* * The scanout buffer pages are not mapped, so for each pixel, * use kmap_local_page_try_from_panic() to map the page, and write the pix= el. @@ -396,7 +405,10 @@ static void i915_gem_object_panic_page_set_pixel(struc= t drm_scanout_buffer *sb, unsigned int new_page; unsigned int offset; =20 - offset =3D y * sb->pitch[0] + x * sb->format->cpp[0]; + if (i915_panic_tiling) + offset =3D i915_panic_tiling(sb->width, x, y); + else + offset =3D y * sb->pitch[0] + x * sb->format->cpp[0]; =20 new_page =3D offset >> PAGE_SHIFT; offset =3D offset % PAGE_SIZE; @@ -417,11 +429,14 @@ static void i915_gem_object_panic_page_set_pixel(stru= ct drm_scanout_buffer *sb, * Use current vaddr if it exists, or setup a list of pages. * pfn is not supported yet. */ -int i915_gem_object_panic_setup(struct drm_i915_gem_object *obj, struct dr= m_scanout_buffer *sb) +int i915_gem_object_panic_setup(struct drm_i915_gem_object *obj, struct dr= m_scanout_buffer *sb, + unsigned int (*tiling)(unsigned int, unsigned int, unsigned int)) { enum i915_map_type has_type; void *ptr; =20 + i915_panic_tiling =3D tiling; + ptr =3D page_unpack_bits(obj->mm.mapping, &has_type); if (ptr) { if (i915_gem_object_has_iomem(obj)) @@ -429,6 +444,8 @@ int i915_gem_object_panic_setup(struct drm_i915_gem_obj= ect *obj, struct drm_scan else iosys_map_set_vaddr(&sb->map[0], ptr); =20 + if (tiling) + sb->set_pixel =3D i915_gem_object_panic_map_set_pixel; return 0; } if (i915_gem_object_has_struct_page(obj)) { diff --git a/drivers/gpu/drm/xe/display/intel_bo.c b/drivers/gpu/drm/xe/dis= play/intel_bo.c index eb9a3400c110..af990a8cd674 100644 --- a/drivers/gpu/drm/xe/display/intel_bo.c +++ b/drivers/gpu/drm/xe/display/intel_bo.c @@ -64,6 +64,7 @@ void intel_bo_describe(struct seq_file *m, struct drm_gem= _object *obj) static int xe_panic_page =3D -1; static void *xe_panic_vaddr; static struct xe_bo *xe_panic_bo; +static unsigned int (*xe_panic_tiling)(unsigned int, unsigned int, unsigne= d int); =20 static void xe_panic_kunmap(void) { @@ -84,7 +85,10 @@ static void xe_panic_page_set_pixel(struct drm_scanout_b= uffer *sb, unsigned int unsigned int new_page; unsigned int offset; =20 - offset =3D y * sb->pitch[0] + x * sb->format->cpp[0]; + if (xe_panic_tiling) + offset =3D xe_panic_tiling(sb->width, x, y); + else + offset =3D y * sb->pitch[0] + x * sb->format->cpp[0]; =20 new_page =3D offset >> PAGE_SHIFT; offset =3D offset % PAGE_SIZE; @@ -100,11 +104,13 @@ static void xe_panic_page_set_pixel(struct drm_scanou= t_buffer *sb, unsigned int } } =20 -int intel_bo_panic_setup(struct drm_gem_object *obj, struct drm_scanout_bu= ffer *sb) +int intel_bo_panic_setup(struct drm_gem_object *obj, struct drm_scanout_bu= ffer *sb, + unsigned int (*tiling)(unsigned int, unsigned int, unsigned int)) { struct xe_bo *bo =3D gem_to_xe_bo(obj); =20 xe_panic_bo =3D bo; + xe_panic_tiling =3D tiling; sb->set_pixel =3D xe_panic_page_set_pixel; return 0; } --=20 2.49.0