From patchwork Mon Nov 22 07:06:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 12631325 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 92AD9C433EF for ; Mon, 22 Nov 2021 07:06:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 43FED89DBA; Mon, 22 Nov 2021 07:06:47 +0000 (UTC) Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by gabe.freedesktop.org (Postfix) with ESMTPS id 42FB089DBA for ; Mon, 22 Nov 2021 07:06:46 +0000 (UTC) Received: by mail-pj1-x102b.google.com with SMTP id n15-20020a17090a160f00b001a75089daa3so16088201pja.1 for ; Sun, 21 Nov 2021 23:06:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0XFk49kXXNRFvrMfM7DSwlxpV7kXg9JtcjoCJwRHxZ8=; b=UXfL6OqF8gdl43J6LVMRCi8w35RtoKXuj7em8jnp0QVeXGb4oJD5BFdO861OoCsI6u yr17puC0EjwBTXfXNAnQ1Q254Qz0Pym4saWnPFRo6egYXivoOhsFVjvu4z/yapj0X5bo 2Va5CPxnQg0mbiCZmlrpjMAZjIcKiTPVgqq7g= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0XFk49kXXNRFvrMfM7DSwlxpV7kXg9JtcjoCJwRHxZ8=; b=v9flyZkaGk7TZ54SCyandVswkQpJTM4FTRsI1ADpjm3ieiM8GP/ij9VnPMIGD0FmsC tau6kZWA7TQlywLvpi9k1aT4ZmbJWCMXEff0xVETDxE+4iXs2y8pzYxR99AyiSneZuyK CS8k8KBHByKeZhRjz/+ir70ak906mvH4ynuZt41LgEWk0YUJwxXT8Qxg7dmtQ0uSrDMW GmB1EEgrW/8QWbCXwBmiK3JDT+x/b3S1urgodlc+jVZLhy+qeCCy5f92wt92V/nb0WWR gORSUgM2mrfLn1f1WlSD1fitdrW/Q7BZX0yYE5+pTLmyzl2+T3oxvR0v1x7MtZktkI6V Nj3A== X-Gm-Message-State: AOAM530PS0A43zDESpe4vVpboVoyJzASFJTBDa8Kfw4lpH5hqAkHkLsV h8NS0jKcvwhBu4B5TDBXu8qfKg== X-Google-Smtp-Source: ABdhPJxiOb+CEy6+wHRumyAOMeOP4Aa3P7Eq1qVIj0v3zfuSBvEvymEKATfJ5zOBcTtvb+q+bewo1w== X-Received: by 2002:a17:90b:4f86:: with SMTP id qe6mr28359243pjb.198.1637564805820; Sun, 21 Nov 2021 23:06:45 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a0a9:eed6:c913:819a:3850]) by smtp.gmail.com with ESMTPSA id s38sm4513088pga.40.2021.11.21.23.06.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Nov 2021 23:06:45 -0800 (PST) From: Jagan Teki To: Inki Dae , Marek Szyprowski , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Sam Ravnborg Subject: [PATCH 1/2] drm: exynos: dsi: Convert to bridge driver Date: Mon, 22 Nov 2021 12:36:32 +0530 Message-Id: <20211122070633.89219-2-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211122070633.89219-1-jagan@amarulasolutions.com> References: <20211122070633.89219-1-jagan@amarulasolutions.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amarula@amarulasolutions.com, Jagan Teki , dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Some display panels would come up with a non-DSI output, those can have an option to connect the DSI host by means of interface bridge converter. This DSI to non-DSI interface bridge converter would requires DSI Host to handle drm bridge functionalities in order to DSI Host to Interface bridge. This patch convert the existing to a drm bridge driver with a built-in encoder support for compatibility with existing component drivers. Signed-off-by: Jagan Teki --- Note: Hi Marek Szyprowski, Please test this on Panel and Bridge hardware. drivers/gpu/drm/exynos/exynos_drm_dsi.c | 73 +++++++++++++++++-------- 1 file changed, 51 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 8d137857818c..174590f543c3 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -257,6 +257,7 @@ struct exynos_dsi { struct drm_connector connector; struct drm_panel *panel; struct list_head bridge_chain; + struct drm_bridge bridge; struct drm_bridge *out_bridge; struct device *dev; @@ -287,9 +288,9 @@ struct exynos_dsi { #define host_to_dsi(host) container_of(host, struct exynos_dsi, dsi_host) #define connector_to_dsi(c) container_of(c, struct exynos_dsi, connector) -static inline struct exynos_dsi *encoder_to_dsi(struct drm_encoder *e) +static inline struct exynos_dsi *bridge_to_dsi(struct drm_bridge *b) { - return container_of(e, struct exynos_dsi, encoder); + return container_of(b, struct exynos_dsi, bridge); } enum reg_idx { @@ -1374,9 +1375,10 @@ static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi) } } -static void exynos_dsi_enable(struct drm_encoder *encoder) +static void exynos_dsi_atomic_enable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { - struct exynos_dsi *dsi = encoder_to_dsi(encoder); + struct exynos_dsi *dsi = bridge_to_dsi(bridge); struct drm_bridge *iter; int ret; @@ -1399,7 +1401,8 @@ static void exynos_dsi_enable(struct drm_encoder *encoder) list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) { if (iter->funcs->pre_enable) - iter->funcs->pre_enable(iter); + iter->funcs->atomic_pre_enable(iter, + old_bridge_state); } } @@ -1413,7 +1416,7 @@ static void exynos_dsi_enable(struct drm_encoder *encoder) } else { list_for_each_entry(iter, &dsi->bridge_chain, chain_node) { if (iter->funcs->enable) - iter->funcs->enable(iter); + iter->funcs->atomic_enable(iter, old_bridge_state); } } @@ -1429,9 +1432,10 @@ static void exynos_dsi_enable(struct drm_encoder *encoder) pm_runtime_put(dsi->dev); } -static void exynos_dsi_disable(struct drm_encoder *encoder) +static void exynos_dsi_atomic_disable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) { - struct exynos_dsi *dsi = encoder_to_dsi(encoder); + struct exynos_dsi *dsi = bridge_to_dsi(bridge); struct drm_bridge *iter; if (!(dsi->state & DSIM_STATE_ENABLED)) @@ -1443,7 +1447,7 @@ static void exynos_dsi_disable(struct drm_encoder *encoder) list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) { if (iter->funcs->disable) - iter->funcs->disable(iter); + iter->funcs->atomic_disable(iter, old_bridge_state); } exynos_dsi_set_display_enable(dsi, false); @@ -1451,7 +1455,7 @@ static void exynos_dsi_disable(struct drm_encoder *encoder) list_for_each_entry(iter, &dsi->bridge_chain, chain_node) { if (iter->funcs->post_disable) - iter->funcs->post_disable(iter); + iter->funcs->atomic_post_disable(iter, old_bridge_state); } dsi->state &= ~DSIM_STATE_ENABLED; @@ -1494,9 +1498,9 @@ static const struct drm_connector_helper_funcs exynos_dsi_connector_helper_funcs .get_modes = exynos_dsi_get_modes, }; -static int exynos_dsi_create_connector(struct drm_encoder *encoder) +static int exynos_dsi_create_connector(struct exynos_dsi *dsi) { - struct exynos_dsi *dsi = encoder_to_dsi(encoder); + struct drm_encoder *encoder = &dsi->encoder; struct drm_connector *connector = &dsi->connector; struct drm_device *drm = encoder->dev; int ret; @@ -1522,9 +1526,21 @@ static int exynos_dsi_create_connector(struct drm_encoder *encoder) return 0; } -static const struct drm_encoder_helper_funcs exynos_dsi_encoder_helper_funcs = { - .enable = exynos_dsi_enable, - .disable = exynos_dsi_disable, +static int exynos_dsi_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct exynos_dsi *dsi = bridge_to_dsi(bridge); + + return drm_bridge_attach(bridge->encoder, dsi->out_bridge, NULL, 0); +} + +static const struct drm_bridge_funcs exynos_dsi_bridge_funcs = { + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, + .atomic_enable = exynos_dsi_atomic_enable, + .atomic_disable = exynos_dsi_atomic_disable, + .attach = exynos_dsi_attach, }; MODULE_DEVICE_TABLE(of, exynos_dsi_of_match); @@ -1543,7 +1559,7 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host, dsi->out_bridge = out_bridge; list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain); } else { - int ret = exynos_dsi_create_connector(encoder); + int ret = exynos_dsi_create_connector(dsi); if (ret) { DRM_DEV_ERROR(dsi->dev, @@ -1596,7 +1612,7 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host, if (dsi->panel) { mutex_lock(&drm->mode_config.mutex); - exynos_dsi_disable(&dsi->encoder); + exynos_dsi_atomic_disable(&dsi->bridge, NULL); dsi->panel = NULL; dsi->connector.status = connector_status_disconnected; mutex_unlock(&drm->mode_config.mutex); @@ -1702,12 +1718,16 @@ static int exynos_dsi_bind(struct device *dev, struct device *master, drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_TMDS); - drm_encoder_helper_add(encoder, &exynos_dsi_encoder_helper_funcs); - ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD); if (ret < 0) return ret; + ret = drm_bridge_attach(&dsi->encoder, &dsi->bridge, NULL, 0); + if (ret) { + drm_encoder_cleanup(&dsi->encoder); + return ret; + } + in_bridge_node = of_graph_get_remote_node(dev->of_node, DSI_PORT_IN, 0); if (in_bridge_node) { in_bridge = of_drm_find_bridge(in_bridge_node); @@ -1723,10 +1743,9 @@ static void exynos_dsi_unbind(struct device *dev, struct device *master, void *data) { struct exynos_dsi *dsi = dev_get_drvdata(dev); - struct drm_encoder *encoder = &dsi->encoder; - - exynos_dsi_disable(encoder); + exynos_dsi_atomic_disable(&dsi->bridge, NULL); + drm_encoder_cleanup(&dsi->encoder); mipi_dsi_host_unregister(&dsi->dsi_host); } @@ -1819,6 +1838,12 @@ static int exynos_dsi_probe(struct platform_device *pdev) pm_runtime_enable(dev); + dsi->bridge.funcs = &exynos_dsi_bridge_funcs; + dsi->bridge.of_node = dev->of_node; + dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; + + drm_bridge_add(&dsi->bridge); + ret = component_add(dev, &exynos_dsi_component_ops); if (ret) goto err_disable_runtime; @@ -1833,6 +1858,10 @@ static int exynos_dsi_probe(struct platform_device *pdev) static int exynos_dsi_remove(struct platform_device *pdev) { + struct exynos_dsi *dsi = platform_get_drvdata(pdev); + + drm_bridge_remove(&dsi->bridge); + pm_runtime_disable(&pdev->dev); component_del(&pdev->dev, &exynos_dsi_component_ops);