From nobody Mon Feb 9 11:29:36 2026 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 E3F6B250BED for ; Fri, 25 Apr 2025 10:28:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745576921; cv=none; b=A90Z8NO9+uLUWba1hUyGW1zSkSf71L+E/l0a6VGp2UBPIX0vDx61lMXXXzrZPeOndYvzGNbVBtV0P3nvIlPDOCh5Os6hkb9BK8UfbKknTzPxmJ2hq4JeLEQ5yNybkSidVrXkXVEoZ5JUisJZGpK97KlXJOKzqGnusuFAoX4xZxA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745576921; c=relaxed/simple; bh=ZVU2WaW7uifp+B3XQuRHQ86jvGOQE7Eh05ee1wZHt4Q=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hYIJry9JaLJ2gPrRySs+h89uzas+HTlF1nPOMVXI1toymEmASbvU6gga0I7md7UJTeMiVqoKWxShclnZ72erOgBwobM5K+dLWSvpmbpbsftirKg4r6JFyam4yrEDEUJ8MB4dNGsAGkNqK3/LX80AiaO5zej1GhLcW4jyYGxwKM0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=f+e72Eop; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="f+e72Eop" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1745576917; bh=ZVU2WaW7uifp+B3XQuRHQ86jvGOQE7Eh05ee1wZHt4Q=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=f+e72Eopswe+gMTjkIiWfIHOa2LC6wmhBmYu6K1Zg4VabA7uzyQe3tl/PCBcoMA8W kabw07n4ZFeG2d4wO7fqrU54v7Hs0hHRUdf2l0lS+GbK0QACA86kxXXyA4LjAzV+tv q69JqcXfnB9pWp/2PZXhTkg220NSj80jNeOHqiYynW/jmfWlRXYDzAoFud89db5yJO 901IvKfg71jP1DTeihitRm14Zg4ayr0suoygrdlhEim6XKaDmNoaX3vTy4jWAOdz2P 3FUYq2oglZlrZcyL9psUv1AYMCu2stPKuukFutFHLbmYzwvX8tLgHa/MnVqzzf2265 EQgFtXvX+xpJQ== Received: from localhost (unknown [82.76.59.226]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: cristicc) by bali.collaboradmins.com (Postfix) with UTF8SMTPSA id 0188A17E36C2; Fri, 25 Apr 2025 12:28:36 +0200 (CEST) From: Cristian Ciocaltea Date: Fri, 25 Apr 2025 13:27:13 +0300 Subject: [PATCH v4 22/23] drm/tests: hdmi: Add test for unsuccessful fallback to YUV420 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250425-hdmi-conn-yuv-v4-22-5e55e2aaa3fa@collabora.com> References: <20250425-hdmi-conn-yuv-v4-0-5e55e2aaa3fa@collabora.com> In-Reply-To: <20250425-hdmi-conn-yuv-v4-0-5e55e2aaa3fa@collabora.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dave Stevenson , Dmitry Baryshkov , Dmitry Baryshkov , Dmitry Baryshkov Cc: kernel@collabora.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 Provide test to verify a mandatory fallback to YUV420 output cannot succeed when driver doesn't advertise YUV420 support. Signed-off-by: Cristian Ciocaltea Acked-by: Maxime Ripard --- drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c | 72 ++++++++++++++++++= ++++ 1 file changed, 72 insertions(+) diff --git a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c b/drivers/g= pu/drm/tests/drm_hdmi_state_helper_test.c index e7e55db0add5b28ba7114d45a272d98daed2513c..d79084cfb516b69c4244098c076= 7d604ad02f2c3 100644 --- a/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c +++ b/drivers/gpu/drm/tests/drm_hdmi_state_helper_test.c @@ -1551,6 +1551,77 @@ static void drm_test_check_max_tmds_rate_bpc_fallbac= k_ignore_yuv420(struct kunit drm_modeset_acquire_fini(&ctx); } =20 +/* + * Test that if a driver supports only RGB, but the chosen mode can be + * supported by the screen only in YUV420 output format, we end up with + * unsuccessful fallback attempts. + */ +static void drm_test_check_driver_unsupported_fallback_yuv420(struct kunit= *test) +{ + struct drm_atomic_helper_connector_hdmi_priv *priv; + struct drm_modeset_acquire_ctx ctx; + struct drm_connector_state *conn_state; + struct drm_crtc_state *crtc_state; + struct drm_atomic_state *state; + struct drm_display_info *info; + struct drm_display_mode *preferred, *yuv420_only_mode; + struct drm_connector *conn; + struct drm_device *drm; + struct drm_crtc *crtc; + int ret; + + priv =3D drm_kunit_helper_connector_hdmi_init_with_edid_funcs(test, + BIT(HDMI_COLORSPACE_RGB), + 12, + &dummy_connector_hdmi_funcs, + test_edid_hdmi_1080p_rgb_yuv_4k_yuv420_dc_max_200mhz); + KUNIT_ASSERT_NOT_NULL(test, priv); + + drm =3D &priv->drm; + crtc =3D priv->crtc; + conn =3D &priv->connector; + info =3D &conn->display_info; + KUNIT_ASSERT_TRUE(test, info->is_hdmi); + KUNIT_ASSERT_FALSE(test, conn->ycbcr_420_allowed); + + preferred =3D find_preferred_mode(conn); + KUNIT_ASSERT_NOT_NULL(test, preferred); + KUNIT_ASSERT_FALSE(test, drm_mode_is_420_also(info, preferred)); + + yuv420_only_mode =3D drm_kunit_display_mode_from_cea_vic(test, drm, 95); + KUNIT_ASSERT_NOT_NULL(test, yuv420_only_mode); + KUNIT_ASSERT_TRUE(test, drm_mode_is_420_only(info, yuv420_only_mode)); + + drm_modeset_acquire_init(&ctx, 0); + + ret =3D drm_kunit_helper_try_enable_crtc_connector(test, drm, + crtc, conn, + preferred, &ctx); + KUNIT_EXPECT_EQ(test, ret, 0); + + conn_state =3D conn->state; + KUNIT_ASSERT_NOT_NULL(test, conn_state); + KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB= ); + + state =3D drm_kunit_helper_atomic_state_alloc(test, drm, &ctx); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state); + +retry: + crtc_state =3D drm_atomic_get_crtc_state(state, crtc); + drm_kunit_atomic_restart_on_deadlock(ret, state, &ctx, retry); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state); + + ret =3D drm_atomic_set_mode_for_crtc(crtc_state, yuv420_only_mode); + KUNIT_EXPECT_EQ(test, ret, 0); + + ret =3D drm_atomic_check_only(state); + drm_kunit_atomic_restart_on_deadlock(ret, state, &ctx, retry); + KUNIT_ASSERT_LT(test, ret, 0); + + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); +} + /* * Test that if a driver and screen supports RGB and YUV formats, and we * try to set the VIC 1 mode, we end up with 8bpc RGB even if we could @@ -1951,6 +2022,7 @@ static struct kunit_case drm_atomic_helper_connector_= hdmi_check_tests[] =3D { KUNIT_CASE(drm_test_check_max_tmds_rate_bpc_fallback_yuv420), KUNIT_CASE(drm_test_check_max_tmds_rate_bpc_fallback_ignore_yuv422), KUNIT_CASE(drm_test_check_max_tmds_rate_bpc_fallback_ignore_yuv420), + KUNIT_CASE(drm_test_check_driver_unsupported_fallback_yuv420), KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_changed), KUNIT_CASE(drm_test_check_output_bpc_crtc_mode_not_changed), KUNIT_CASE(drm_test_check_output_bpc_dvi), --=20 2.49.0