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([94.73.37.161]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38c2a176434sm16947113f8f.13.2025.01.29.03.01.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Jan 2025 03:01:16 -0800 (PST) From: =?UTF-8?q?Jos=C3=A9=20Exp=C3=B3sito?= To: louis.chauvet@bootlin.com Cc: hamohammed.sa@gmail.com, simona@ffwll.ch, melissa.srw@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, =?UTF-8?q?Jos=C3=A9=20Exp=C3=B3sito?= Subject: [PATCH 10/13] drm/vkms: Allow to configure multiple encoders Date: Wed, 29 Jan 2025 12:00:56 +0100 Message-ID: <20250129110059.12199-11-jose.exposito89@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250129110059.12199-1-jose.exposito89@gmail.com> References: <20250129110059.12199-1-jose.exposito89@gmail.com> 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 Add a list of encoders to vkms_config and helper functions to add and remove as many encoders as wanted. For backwards compatibility, add one encoder to the default configuration. A future patch will allow to attach encoders and CRTCs, but for the moment there are no changes in the way the output is configured. Signed-off-by: Louis Chauvet Signed-off-by: Jos=C3=A9 Exp=C3=B3sito --- drivers/gpu/drm/vkms/tests/vkms_config_test.c | 65 ++++++++++++++++ drivers/gpu/drm/vkms/vkms_config.c | 78 +++++++++++++++++++ drivers/gpu/drm/vkms/vkms_config.h | 49 ++++++++++++ 3 files changed, 192 insertions(+) diff --git a/drivers/gpu/drm/vkms/tests/vkms_config_test.c b/drivers/gpu/dr= m/vkms/tests/vkms_config_test.c index 5e698616491a..6c09363d9a96 100644 --- a/drivers/gpu/drm/vkms/tests/vkms_config_test.c +++ b/drivers/gpu/drm/vkms/tests/vkms_config_test.c @@ -26,6 +26,7 @@ static void vkms_config_test_empty_config(struct kunit *t= est) =20 KUNIT_EXPECT_TRUE(test, list_empty(&config->planes)); KUNIT_EXPECT_TRUE(test, list_empty(&config->crtcs)); + KUNIT_EXPECT_TRUE(test, list_empty(&config->encoders)); =20 KUNIT_EXPECT_FALSE(test, vkms_config_is_valid(config)); =20 @@ -99,6 +100,9 @@ static void vkms_config_test_default_config(struct kunit= *test) KUNIT_EXPECT_EQ(test, n_possible_crtcs, 1); } =20 + /* Encoders */ + KUNIT_EXPECT_EQ(test, list_count_nodes(&config->encoders), 1); + KUNIT_EXPECT_TRUE(test, vkms_config_is_valid(config)); =20 vkms_config_destroy(config); @@ -176,6 +180,42 @@ static void vkms_config_test_get_crtcs(struct kunit *t= est) vkms_config_destroy(config); } =20 +static void vkms_config_test_get_encoders(struct kunit *test) +{ + struct vkms_config *config; + struct vkms_config_encoder *encoder_cfg1, *encoder_cfg2; + struct vkms_config_encoder **array; + size_t length; + + config =3D vkms_config_create("test"); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, config); + + array =3D vkms_config_get_encoders(config, &length); + KUNIT_ASSERT_EQ(test, length, 0); + KUNIT_ASSERT_NULL(test, array); + + encoder_cfg1 =3D vkms_config_add_encoder(config); + array =3D vkms_config_get_encoders(config, &length); + KUNIT_ASSERT_EQ(test, length, 1); + KUNIT_ASSERT_PTR_EQ(test, array[0], encoder_cfg1); + kfree(array); + + encoder_cfg2 =3D vkms_config_add_encoder(config); + array =3D vkms_config_get_encoders(config, &length); + KUNIT_ASSERT_EQ(test, length, 2); + KUNIT_ASSERT_PTR_EQ(test, array[0], encoder_cfg1); + KUNIT_ASSERT_PTR_EQ(test, array[1], encoder_cfg2); + kfree(array); + + vkms_config_destroy_encoder(config, encoder_cfg2); + array =3D vkms_config_get_encoders(config, &length); + KUNIT_ASSERT_EQ(test, length, 1); + KUNIT_ASSERT_PTR_EQ(test, array[0], encoder_cfg1); + kfree(array); + + vkms_config_destroy(config); +} + static void vkms_config_test_valid_plane_number(struct kunit *test) { struct vkms_config *config; @@ -311,6 +351,29 @@ static void vkms_config_test_valid_crtc_number(struct = kunit *test) vkms_config_destroy(config); } =20 +static void vkms_config_test_valid_encoder_number(struct kunit *test) +{ + struct vkms_config *config; + struct vkms_config_encoder *encoder_cfg; + int n; + + config =3D vkms_config_default_create(false, false, false); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, config); + + /* Invalid: No encoders */ + encoder_cfg =3D list_first_entry(&config->encoders, typeof(*encoder_cfg),= link); + vkms_config_destroy_encoder(config, encoder_cfg); + KUNIT_EXPECT_FALSE(test, vkms_config_is_valid(config)); + + /* Invalid: Too many encoders */ + for (n =3D 0; n <=3D 32; n++) + vkms_config_add_encoder(config); + + KUNIT_EXPECT_FALSE(test, vkms_config_is_valid(config)); + + vkms_config_destroy(config); +} + static void vkms_config_test_plane_attach_crtc(struct kunit *test) { struct vkms_config *config; @@ -439,10 +502,12 @@ static struct kunit_case vkms_config_test_cases[] =3D= { default_config_gen_params), KUNIT_CASE(vkms_config_test_get_planes), KUNIT_CASE(vkms_config_test_get_crtcs), + KUNIT_CASE(vkms_config_test_get_encoders), KUNIT_CASE(vkms_config_test_valid_plane_number), KUNIT_CASE(vkms_config_test_valid_plane_type), KUNIT_CASE(vkms_config_test_valid_plane_possible_crtcs), KUNIT_CASE(vkms_config_test_valid_crtc_number), + KUNIT_CASE(vkms_config_test_valid_encoder_number), KUNIT_CASE(vkms_config_test_plane_attach_crtc), KUNIT_CASE(vkms_config_test_plane_get_possible_crtcs), {} diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms= _config.c index a2ce4905589b..75e72f9b5972 100644 --- a/drivers/gpu/drm/vkms/vkms_config.c +++ b/drivers/gpu/drm/vkms/vkms_config.c @@ -23,6 +23,7 @@ struct vkms_config *vkms_config_create(const char *dev_na= me) =20 INIT_LIST_HEAD(&config->planes); INIT_LIST_HEAD(&config->crtcs); + INIT_LIST_HEAD(&config->encoders); =20 return config; } @@ -34,6 +35,7 @@ struct vkms_config *vkms_config_default_create(bool enabl= e_cursor, struct vkms_config *config; struct vkms_config_plane *plane_cfg; struct vkms_config_crtc *crtc_cfg; + struct vkms_config_encoder *encoder_cfg; int n; =20 config =3D vkms_config_create(DEFAULT_DEVICE_NAME); @@ -78,6 +80,10 @@ struct vkms_config *vkms_config_default_create(bool enab= le_cursor, goto err_alloc; } =20 + encoder_cfg =3D vkms_config_add_encoder(config); + if (IS_ERR(encoder_cfg)) + goto err_alloc; + return config; =20 err_alloc: @@ -89,6 +95,7 @@ void vkms_config_destroy(struct vkms_config *config) { struct vkms_config_plane *plane_cfg, *plane_tmp; struct vkms_config_crtc *crtc_cfg, *crtc_tmp; + struct vkms_config_encoder *encoder_cfg, *encoder_tmp; =20 list_for_each_entry_safe(plane_cfg, plane_tmp, &config->planes, link) vkms_config_destroy_plane(plane_cfg); @@ -96,6 +103,9 @@ void vkms_config_destroy(struct vkms_config *config) list_for_each_entry_safe(crtc_cfg, crtc_tmp, &config->crtcs, link) vkms_config_destroy_crtc(config, crtc_cfg); =20 + list_for_each_entry_safe(encoder_cfg, encoder_tmp, &config->encoders, lin= k) + vkms_config_destroy_encoder(config, encoder_cfg); + kfree_const(config->dev_name); kfree(config); } @@ -154,6 +164,33 @@ struct vkms_config_crtc **vkms_config_get_crtcs(const = struct vkms_config *config return array; } =20 +struct vkms_config_encoder **vkms_config_get_encoders(const struct vkms_co= nfig *config, + size_t *out_length) +{ + struct vkms_config_encoder **array; + struct vkms_config_encoder *encoder_cfg; + size_t length; + int n =3D 0; + + length =3D list_count_nodes((struct list_head *)&config->encoders); + if (length =3D=3D 0) { + *out_length =3D length; + return NULL; + } + + array =3D kmalloc_array(length, sizeof(*array), GFP_KERNEL); + if (!array) + return ERR_PTR(-ENOMEM); + + list_for_each_entry(encoder_cfg, &config->encoders, link) { + array[n] =3D encoder_cfg; + n++; + } + + *out_length =3D length; + return array; +} + static bool valid_plane_number(struct vkms_config *config) { size_t n_planes; @@ -238,6 +275,19 @@ static bool valid_crtc_number(struct vkms_config *conf= ig) return true; } =20 +static bool valid_encoder_number(struct vkms_config *config) +{ + size_t n_encoders; + + n_encoders =3D list_count_nodes(&config->encoders); + if (n_encoders <=3D 0 || n_encoders >=3D 32) { + pr_err("The number of encoders must be between 1 and 31\n"); + return false; + } + + return true; +} + bool vkms_config_is_valid(struct vkms_config *config) { struct vkms_config_crtc *crtc_cfg; @@ -248,6 +298,9 @@ bool vkms_config_is_valid(struct vkms_config *config) if (!valid_crtc_number(config)) return false; =20 + if (!valid_encoder_number(config)) + return false; + if (!valid_plane_possible_crtcs(config)) return false; =20 @@ -267,6 +320,7 @@ static int vkms_config_show(struct seq_file *m, void *d= ata) const char *dev_name; struct vkms_config_plane *plane_cfg; struct vkms_config_crtc *crtc_cfg; + struct vkms_config_encoder *encoder_cfg; =20 dev_name =3D vkms_config_get_device_name((struct vkms_config *)vkmsdev->c= onfig); seq_printf(m, "dev_name=3D%s\n", dev_name); @@ -283,6 +337,10 @@ static int vkms_config_show(struct seq_file *m, void *= data) vkms_config_crtc_get_writeback(crtc_cfg)); } =20 + list_for_each_entry(encoder_cfg, &vkmsdev->config->encoders, link) { + seq_puts(m, "encoder\n"); + } + return 0; } =20 @@ -436,3 +494,23 @@ struct vkms_config_plane *vkms_config_crtc_cursor_plan= e(const struct vkms_config { return vkms_config_crtc_get_plane(config, crtc_cfg, DRM_PLANE_TYPE_CURSOR= ); } + +struct vkms_config_encoder *vkms_config_add_encoder(struct vkms_config *co= nfig) +{ + struct vkms_config_encoder *encoder_cfg; + + encoder_cfg =3D kzalloc(sizeof(*encoder_cfg), GFP_KERNEL); + if (!encoder_cfg) + return ERR_PTR(-ENOMEM); + + list_add_tail(&encoder_cfg->link, &config->encoders); + + return encoder_cfg; +} + +void vkms_config_destroy_encoder(struct vkms_config *config, + struct vkms_config_encoder *encoder_cfg) +{ + list_del(&encoder_cfg->link); + kfree(encoder_cfg); +} diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms= _config.h index 1f2e6c485d08..40774d0daeac 100644 --- a/drivers/gpu/drm/vkms/vkms_config.h +++ b/drivers/gpu/drm/vkms/vkms_config.h @@ -14,12 +14,14 @@ * @dev_name: Name of the device * @planes: List of planes configured for the device * @crtcs: List of CRTCs configured for the device + * @encoders: List of encoders configured for the device * @dev: Used to store the current VKMS device. Only set when the device i= s instantiated. */ struct vkms_config { const char *dev_name; struct list_head planes; struct list_head crtcs; + struct list_head encoders; struct vkms_device *dev; }; =20 @@ -64,6 +66,22 @@ struct vkms_config_crtc { struct vkms_output *crtc; }; =20 +/** + * struct vkms_config_encoder + * + * @link: Link to the others encoders in vkms_config + * @encoder: Internal usage. This pointer should never be considered as va= lid. + * It can be used to store a temporary reference to a VKMS encod= er + * during device creation. This pointer is not managed by the + * configuration and must be managed by other means. + */ +struct vkms_config_encoder { + struct list_head link; + + /* Internal usage */ + struct drm_encoder *encoder; +}; + /** * vkms_config_create() - Create a new VKMS configuration * @dev_name: Name of the device @@ -139,6 +157,19 @@ static inline size_t vkms_config_get_num_crtcs(struct = vkms_config *config) struct vkms_config_crtc **vkms_config_get_crtcs(const struct vkms_config *= config, size_t *out_length); =20 +/** + * vkms_config_get_encoders() - Return the array of encoders of the device + * @config: Configuration to get the encoders from + * @out_length: Length of the returned array + * + * Returns: + * A list of pointers to the configurations. On success, the caller is + * responsible to free the returned array, but not its contents. On error, + * it returns an error and @out_length is invalid. + */ +struct vkms_config_encoder **vkms_config_get_encoders(const struct vkms_co= nfig *config, + size_t *out_length); + /** * vkms_config_is_valid() - Validate a configuration * @config: Configuration to validate @@ -285,4 +316,22 @@ struct vkms_config_plane *vkms_config_crtc_primary_pla= ne(const struct vkms_confi struct vkms_config_plane *vkms_config_crtc_cursor_plane(const struct vkms_= config *config, struct vkms_config_crtc *crtc_cfg); =20 +/** + * vkms_config_add_encoder() - Add a new encoder configuration + * @config: Configuration to add the encoder to + * + * Returns: + * The new encoder configuration or an error. Call vkms_config_destroy_enc= oder() + * to free the returned encoder configuration. + */ +struct vkms_config_encoder *vkms_config_add_encoder(struct vkms_config *co= nfig); + +/** + * vkms_config_destroy_encoder() - Remove and free a encoder configuration + * @config: Configuration to remove the encoder from + * @encoder_cfg: Encoder configuration to destroy + */ +void vkms_config_destroy_encoder(struct vkms_config *config, + struct vkms_config_encoder *encoder_cfg); + #endif /* _VKMS_CONFIG_H_ */ --=20 2.48.1