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Fri, 10 Aug 2018 13:04:13 +0000 From: Peter Rosin To: linux-kernel@vger.kernel.org Subject: [PATCH v8 1/4] dt-bindings: display: bridge: lvds-transmitter: add ti, ds90c185 Date: Fri, 10 Aug 2018 15:03:56 +0200 Message-Id: <20180810130359.9882-2-peda@axentia.se> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180810130359.9882-1-peda@axentia.se> References: <20180810130359.9882-1-peda@axentia.se> MIME-Version: 1.0 X-Originating-IP: [85.226.244.23] X-ClientProxiedBy: VI1PR07CA0241.eurprd07.prod.outlook.com (2603:10a6:802:58::44) To VI1PR0201MB2464.eurprd02.prod.outlook.com (2603:10a6:800:55::7) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d0a544dd-c6a1-4692-3673-08d5fec1c606 X-Microsoft-Antispam: BCL:0; PCL:0; RULEID:(7020095)(4652040)(7021125)(8989117)(4534165)(7022125)(4603075)(4627221)(201702281549075)(8990107)(7048125)(7024125)(7027125)(7028125)(7023125)(5600074)(711020)(2017052603328)(7153060)(7193020); SRVR:VI1PR0201MB2464; X-Microsoft-Exchange-Diagnostics: 1; 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Reviewed-by: Laurent Pinchart Reviewed-by: Rob Herring Signed-off-by: Peter Rosin --- .../devicetree/bindings/display/bridge/lvds-transmitter.txt | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt b/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt index fd39ad34c383..50220190c203 100644 --- a/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt +++ b/Documentation/devicetree/bindings/display/bridge/lvds-transmitter.txt @@ -22,7 +22,13 @@ among others. Required properties: -- compatible: Must be "lvds-encoder" +- compatible: Must be one or more of the following + - "ti,ds90c185" for the TI DS90C185 FPD-Link Serializer + - "lvds-encoder" for a generic LVDS encoder device + + When compatible with the generic version, nodes must list the + device-specific version corresponding to the device first + followed by the generic version. 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Fri, 10 Aug 2018 13:04:19 +0000 From: Peter Rosin To: linux-kernel@vger.kernel.org Subject: [PATCH v8 2/4] dt-bindings: display: atmel: optional video-interface of endpoints Date: Fri, 10 Aug 2018 15:03:57 +0200 Message-Id: <20180810130359.9882-3-peda@axentia.se> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180810130359.9882-1-peda@axentia.se> References: <20180810130359.9882-1-peda@axentia.se> MIME-Version: 1.0 X-Originating-IP: [85.226.244.23] X-ClientProxiedBy: VI1PR07CA0241.eurprd07.prod.outlook.com (2603:10a6:802:58::44) To VI1PR0201MB2464.eurprd02.prod.outlook.com (2603:10a6:800:55::7) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 6b7cc891-e4e8-408e-895b-08d5fec1c941 X-Microsoft-Antispam: BCL:0; PCL:0; RULEID:(7020095)(4652040)(7021125)(8989117)(4534165)(7022125)(4603075)(4627221)(201702281549075)(8990107)(7048125)(7024125)(7027125)(7028125)(7023125)(5600074)(711020)(2017052603328)(7153060)(7193020); SRVR:VI1PR0201MB2464; X-Microsoft-Exchange-Diagnostics: 1; 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This can happen e.g. if not all RGB pins are routed on the PCB; the driver has no way of knowing this, and needs to be told explicitly. This is critical for the devices that have the "conflicting output formats" issue (SAM9N12, SAM9X5, SAMA5D3), since the most significant RGB bits move around depending on the selected output mode. For devices that do not have the "conflicting output formats" issue (SAMA5D2, SAMA5D4), this is completely irrelevant. Acked-by: Boris Brezillon Reviewed-by: Rob Herring Reviewed-by: Jacopo Mondi Signed-off-by: Peter Rosin --- .../devicetree/bindings/display/atmel/hlcdc-dc.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt index 82f2acb3d374..d29e1e425518 100644 --- a/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt +++ b/Documentation/devicetree/bindings/display/atmel/hlcdc-dc.txt @@ -15,6 +15,13 @@ Required children nodes: to external devices using the OF graph reprensentation (see ../graph.txt). At least one port node is required. +Optional properties in grandchild nodes: + Any endpoint grandchild node may specify a desired video interface + according to ../../media/video-interfaces.txt, specifically + - bus-width: recognized values are <12>, <16>, <18> and <24>, and + override any output mode selection heuristic, forcing "rgb444", + "rgb565", "rgb666" and "rgb888" respectively. + Example: hlcdc: hlcdc@f0030000 { @@ -50,3 +57,24 @@ Example: #pwm-cells = <3>; }; }; + +Example 2: With a video interface override to force rgb565; as above +but with these changes/additions: + + &hlcdc { + hlcdc-display-controller { + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb565>; + + port@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + + hlcdc_panel_output: endpoint@0 { + reg = <0>; + bus-width = <16>; + }; + }; + }; + }; From patchwork Fri Aug 10 13:03:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Rosin X-Patchwork-Id: 10562675 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2C77413B4 for ; 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You can e.g. have two output nodes where one is not enabled, without the ordering affecting things. Prior to this patch the active node had to have endpoint id zero. Signed-off-by: Peter Rosin Reviewed-by: Jacopo Mondi --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 32 ++++++++++++++++++------ 1 file changed, 25 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c index 8db51fb131db..16c1b2f54b42 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c @@ -31,14 +31,16 @@ static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = { .destroy = drm_encoder_cleanup, }; -static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, int endpoint) +static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, + struct of_endpoint *endpoint) { struct drm_encoder *encoder; struct drm_panel *panel; struct drm_bridge *bridge; int ret; - ret = drm_of_find_panel_or_bridge(dev->dev->of_node, 0, endpoint, + ret = drm_of_find_panel_or_bridge(dev->dev->of_node, + endpoint->port, endpoint->id, &panel, &bridge); if (ret) return ret; @@ -77,13 +79,29 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, int endpoint) int atmel_hlcdc_create_outputs(struct drm_device *dev) { - int endpoint, ret = 0; - - for (endpoint = 0; !ret; endpoint++) - ret = atmel_hlcdc_attach_endpoint(dev, endpoint); + struct of_endpoint endpoint; + struct device_node *node = NULL; + int count = 0; + int ret = 0; + + for_each_endpoint_of_node(dev->dev->of_node, node) { + of_graph_parse_endpoint(node, &endpoint); + + if (endpoint.port) + continue; + + ret = atmel_hlcdc_attach_endpoint(dev, &endpoint); + if (ret == -ENODEV) + continue; + if (ret) { + of_node_put(node); + break; + } + count++; + } /* At least one device was successfully attached.*/ - if (ret == -ENODEV && endpoint) + if (ret == -ENODEV && count) return 0; return ret; From patchwork Fri Aug 10 13:03:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Rosin X-Patchwork-Id: 10562677 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 72146139A for ; 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E.g. if there is a bridge that changes format between the encoder and the connector, or if some of the RGB pins between the lcd controller and the encoder are not routed on the PCB. This is critical for the devices that have the "conflicting output formats" issue (SAM9N12, SAM9X5, SAMA5D3), since the most significant RGB bits move around depending on the selected output mode. For devices that do not have the "conflicting output formats" issue (SAMA5D2, SAMA5D4), this is completely irrelevant. Acked-by: Boris Brezillon Reviewed-by: Jacopo Mondi Signed-off-by: Peter Rosin --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 70 +++++++++++++++++------- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 1 + drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c | 66 +++++++++++++++++++--- 3 files changed, 110 insertions(+), 27 deletions(-) diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c index d73281095fac..c38a479ada98 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c @@ -226,6 +226,55 @@ static void atmel_hlcdc_crtc_atomic_enable(struct drm_crtc *c, #define ATMEL_HLCDC_RGB888_OUTPUT BIT(3) #define ATMEL_HLCDC_OUTPUT_MODE_MASK GENMASK(3, 0) +static int atmel_hlcdc_connector_output_mode(struct drm_connector_state *state) +{ + struct drm_connector *connector = state->connector; + struct drm_display_info *info = &connector->display_info; + struct drm_encoder *encoder; + unsigned int supported_fmts = 0; + int j; + + encoder = state->best_encoder; + if (!encoder) + encoder = connector->encoder; + + switch (atmel_hlcdc_encoder_get_bus_fmt(encoder)) { + case 0: + break; + case MEDIA_BUS_FMT_RGB444_1X12: + return ATMEL_HLCDC_RGB444_OUTPUT; + case MEDIA_BUS_FMT_RGB565_1X16: + return ATMEL_HLCDC_RGB565_OUTPUT; + case MEDIA_BUS_FMT_RGB666_1X18: + return ATMEL_HLCDC_RGB666_OUTPUT; + case MEDIA_BUS_FMT_RGB888_1X24: + return ATMEL_HLCDC_RGB888_OUTPUT; + default: + return -EINVAL; + } + + for (j = 0; j < info->num_bus_formats; j++) { + switch (info->bus_formats[j]) { + case MEDIA_BUS_FMT_RGB444_1X12: + supported_fmts |= ATMEL_HLCDC_RGB444_OUTPUT; + break; + case MEDIA_BUS_FMT_RGB565_1X16: + supported_fmts |= ATMEL_HLCDC_RGB565_OUTPUT; + break; + case MEDIA_BUS_FMT_RGB666_1X18: + supported_fmts |= ATMEL_HLCDC_RGB666_OUTPUT; + break; + case MEDIA_BUS_FMT_RGB888_1X24: + supported_fmts |= ATMEL_HLCDC_RGB888_OUTPUT; + break; + default: + break; + } + } + + return supported_fmts; +} + static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state) { unsigned int output_fmts = ATMEL_HLCDC_OUTPUT_MODE_MASK; @@ -238,31 +287,12 @@ static int atmel_hlcdc_crtc_select_output_mode(struct drm_crtc_state *state) crtc = drm_crtc_to_atmel_hlcdc_crtc(state->crtc); for_each_new_connector_in_state(state->state, connector, cstate, i) { - struct drm_display_info *info = &connector->display_info; unsigned int supported_fmts = 0; - int j; if (!cstate->crtc) continue; - for (j = 0; j < info->num_bus_formats; j++) { - switch (info->bus_formats[j]) { - case MEDIA_BUS_FMT_RGB444_1X12: - supported_fmts |= ATMEL_HLCDC_RGB444_OUTPUT; - break; - case MEDIA_BUS_FMT_RGB565_1X16: - supported_fmts |= ATMEL_HLCDC_RGB565_OUTPUT; - break; - case MEDIA_BUS_FMT_RGB666_1X18: - supported_fmts |= ATMEL_HLCDC_RGB666_OUTPUT; - break; - case MEDIA_BUS_FMT_RGB888_1X24: - supported_fmts |= ATMEL_HLCDC_RGB888_OUTPUT; - break; - default: - break; - } - } + supported_fmts = atmel_hlcdc_connector_output_mode(cstate); if (crtc->dc->desc->conflicting_output_formats) output_fmts &= supported_fmts; diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h index 60c937f42114..4cc1e03f0aee 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h @@ -441,5 +441,6 @@ void atmel_hlcdc_crtc_irq(struct drm_crtc *c); int atmel_hlcdc_crtc_create(struct drm_device *dev); int atmel_hlcdc_create_outputs(struct drm_device *dev); +int atmel_hlcdc_encoder_get_bus_fmt(struct drm_encoder *encoder); #endif /* DRM_ATMEL_HLCDC_H */ diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c index 16c1b2f54b42..10ed7c221a3c 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c @@ -27,14 +27,59 @@ #include "atmel_hlcdc_dc.h" +struct atmel_hlcdc_rgb_output { + struct drm_encoder encoder; + int bus_fmt; +}; + static const struct drm_encoder_funcs atmel_hlcdc_panel_encoder_funcs = { .destroy = drm_encoder_cleanup, }; +static struct atmel_hlcdc_rgb_output * +atmel_hlcdc_encoder_to_rgb_output(struct drm_encoder *encoder) +{ + return container_of(encoder, struct atmel_hlcdc_rgb_output, encoder); +} + +int atmel_hlcdc_encoder_get_bus_fmt(struct drm_encoder *encoder) +{ + struct atmel_hlcdc_rgb_output *output; + + output = atmel_hlcdc_encoder_to_rgb_output(encoder); + + return output->bus_fmt; +} + +static int atmel_hlcdc_of_bus_fmt(const struct device_node *ep) +{ + u32 bus_width; + int ret; + + ret = of_property_read_u32(ep, "bus-width", &bus_width); + if (ret == -EINVAL) + return 0; + if (ret) + return ret; + + switch (bus_width) { + case 12: + return MEDIA_BUS_FMT_RGB444_1X12; + case 16: + return MEDIA_BUS_FMT_RGB565_1X16; + case 18: + return MEDIA_BUS_FMT_RGB666_1X18; + case 24: + return MEDIA_BUS_FMT_RGB888_1X24; + default: + return -EINVAL; + } +} + static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, struct of_endpoint *endpoint) { - struct drm_encoder *encoder; + struct atmel_hlcdc_rgb_output *output; struct drm_panel *panel; struct drm_bridge *bridge; int ret; @@ -45,17 +90,24 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, if (ret) return ret; - encoder = devm_kzalloc(dev->dev, sizeof(*encoder), GFP_KERNEL); - if (!encoder) + output = devm_kzalloc(dev->dev, sizeof(*output), GFP_KERNEL); + if (!output) + return -ENOMEM; + + output->bus_fmt = atmel_hlcdc_of_bus_fmt(endpoint->local_node); + if (output->bus_fmt < 0) { + dev_err(dev->dev, "endpoint %d: invalid bus width\n", + endpoint->id); return -EINVAL; + } - ret = drm_encoder_init(dev, encoder, + ret = drm_encoder_init(dev, &output->encoder, &atmel_hlcdc_panel_encoder_funcs, DRM_MODE_ENCODER_NONE, NULL); if (ret) return ret; - encoder->possible_crtcs = 0x1; + output->encoder.possible_crtcs = 0x1; if (panel) { bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_Unknown); @@ -64,7 +116,7 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, } if (bridge) { - ret = drm_bridge_attach(encoder, bridge, NULL); + ret = drm_bridge_attach(&output->encoder, bridge, NULL); if (!ret) return 0; @@ -72,7 +124,7 @@ static int atmel_hlcdc_attach_endpoint(struct drm_device *dev, drm_panel_bridge_remove(bridge); } - drm_encoder_cleanup(encoder); + drm_encoder_cleanup(&output->encoder); return ret; }