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Wed, 10 Jun 2026 15:25:17 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id IAvGDt2BKWr3HwAAD6G6ig (envelope-from ); Wed, 10 Jun 2026 15:25:17 +0000 From: Thomas Zimmermann To: mripard@kernel.org, maarten.lankhorst@linux.intel.com, airlied@redhat.com, airlied@gmail.com, simona@ffwll.ch, admin@kodeit.net, gargaditya08@proton.me, paul@crapouillou.net, jani.nikula@linux.intel.com, mhklkml@zohomail.com, zack.rusin@broadcom.com, bcm-kernel-feedback-list@broadcom.com, harry.wentland@amd.com, sunpeng.li@amd.com, siqueira@igalia.com, alexander.deucher@amd.com, rodrigo.vivi@intel.com, joonas.lahtinen@linux.intel.com, tursulin@ursulin.net, javierm@redhat.com, dmitry.osipenko@collabora.com, gurchetansingh@chromium.org, olvaffe@gmail.com Cc: dri-devel@lists.freedesktop.org, linux-hyperv@vger.kernel.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-mips@vger.kernel.org, virtualization@lists.linux.dev, amd-gfx@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v5 07/15] drm/damage-helper: Do not alter damage clips on modeset, but ignore them Date: Wed, 10 Jun 2026 17:18:23 +0200 Message-ID: <20260610152505.260172-8-tzimmermann@suse.de> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260610152505.260172-1-tzimmermann@suse.de> References: <20260610152505.260172-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-mips@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Flag: NO X-Spamd-Result: default: False [-6.79 / 50.00]; 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For full mode sets, drivers still require a full plane update. In this case, leave the information as-is and set the ignore_damage_clips flag instead. The damage iterator will later ignore any damage information. Leaving the damage information as-is might be helpful to drivers that benefit from this information even on full modesets (e.g., for cache management). It will also help with consolidating the damage-handling logic. Also add a new unit test that evaluates the ignore_damage_clips flag. It sets two damage clips plus the flag and tests if the reported damage covers the entire framebuffer. v5: - clear ignore_damage_clips in a separate patch (Javier) v4: - slightly reword the commit description Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Acked-by: Zack Rusin --- drivers/gpu/drm/drm_damage_helper.c | 6 ++-- .../gpu/drm/tests/drm_damage_helper_test.c | 28 +++++++++++++++++++ 2 files changed, 30 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_damage_helper.c b/drivers/gpu/drm/drm_damage_helper.c index 74a7f4252ecf..945fac8dc27b 100644 --- a/drivers/gpu/drm/drm_damage_helper.c +++ b/drivers/gpu/drm/drm_damage_helper.c @@ -78,10 +78,8 @@ void drm_atomic_helper_check_plane_damage(struct drm_atomic_commit *state, if (WARN_ON(!crtc_state)) return; - if (drm_atomic_crtc_needs_modeset(crtc_state)) { - drm_property_blob_put(plane_state->fb_damage_clips); - plane_state->fb_damage_clips = NULL; - } + if (drm_atomic_crtc_needs_modeset(crtc_state)) + plane_state->ignore_damage_clips = true; } } EXPORT_SYMBOL(drm_atomic_helper_check_plane_damage); diff --git a/drivers/gpu/drm/tests/drm_damage_helper_test.c b/drivers/gpu/drm/tests/drm_damage_helper_test.c index 0df2e1a54b0d..64f038a62ffe 100644 --- a/drivers/gpu/drm/tests/drm_damage_helper_test.c +++ b/drivers/gpu/drm/tests/drm_damage_helper_test.c @@ -603,6 +603,33 @@ static void drm_test_damage_iter_damage_not_visible(struct kunit *test) KUNIT_EXPECT_EQ_MSG(test, num_hits, 0, "Should not return any damage."); } +static void drm_test_damage_iter_damage_ignore(struct kunit *test) +{ + struct drm_damage_mock *mock = test->priv; + struct drm_atomic_helper_damage_iter iter; + struct drm_property_blob damage_blob; + struct drm_mode_rect damage[2]; + struct drm_rect clip; + u32 num_hits = 0; + + set_plane_src(&mock->old_state, 0, 0, 1024 << 16, 768 << 16); + set_plane_src(&mock->state, 0, 0, 1024 << 16, 768 << 16); + /* 2 damage clips, but ignore them. */ + set_damage_clip(&damage[0], 20, 30, 200, 180); + set_damage_clip(&damage[1], 240, 200, 280, 250); + set_damage_blob(&damage_blob, &damage[0], sizeof(damage)); + set_plane_damage(&mock->state, &damage_blob); + mock->state.ignore_damage_clips = true; + drm_atomic_helper_damage_iter_init(&iter, &mock->old_state, &mock->state); + drm_atomic_for_each_plane_damage(&iter, &clip) { + if (num_hits == 0) + check_damage_clip(test, &clip, 0, 0, 1024, 768); + num_hits++; + } + + KUNIT_EXPECT_EQ_MSG(test, num_hits, 1, "Should return full-framebuffer damage."); +} + static struct kunit_case drm_damage_helper_tests[] = { KUNIT_CASE(drm_test_damage_iter_no_damage), KUNIT_CASE(drm_test_damage_iter_no_damage_fractional_src), @@ -625,6 +652,7 @@ static struct kunit_case drm_damage_helper_tests[] = { KUNIT_CASE(drm_test_damage_iter_damage_one_outside), KUNIT_CASE(drm_test_damage_iter_damage_src_moved), KUNIT_CASE(drm_test_damage_iter_damage_not_visible), + KUNIT_CASE(drm_test_damage_iter_damage_ignore), { } }; -- 2.54.0