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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2eba65f2-abaa-4e55-3a52-08dcf19c13b6 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7046.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Oct 2024 06:46:22.9847 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: XqRBn44RmuvvTSZlHH7W0ZB3+fEhY0TE9SqtMg2qqePK5qDFcRrVhh+bkg2DetsucQmfUg+PYUFW0i1MyKwFnQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR04MB7374 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241020_234627_461482_59A61D87 X-CRM114-Status: GOOD ( 16.09 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org drm_of_lvds_get_dual_link_pixel_order() gets LVDS dual-link source pixel order. Similar to it, add it's counterpart function drm_of_lvds_get_dual_link_pixel_order_sink() to get LVDS dual-link sink pixel order. Suggested-by: Dmitry Baryshkov Signed-off-by: Liu Ying Reviewed-by: Dmitry Baryshkov --- v3: * New patch. (Dmitry) drivers/gpu/drm/drm_of.c | 76 ++++++++++++++++++++++++++++++++++------ include/drm/drm_of.h | 9 +++++ 2 files changed, 74 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c index 89863a35c731..5c2abc9eca9c 100644 --- a/drivers/gpu/drm/drm_of.c +++ b/drivers/gpu/drm/drm_of.c @@ -341,8 +341,23 @@ static int drm_of_lvds_get_remote_pixels_type( return pixels_type; } +static int __drm_of_lvds_get_dual_link_pixel_order(int p1_pt, int p2_pt) +{ + /* + * A valid dual-lVDS bus is found when one port is marked with + * "dual-lvds-even-pixels", and the other port is marked with + * "dual-lvds-odd-pixels", bail out if the markers are not right. + */ + if (p1_pt + p2_pt != DRM_OF_LVDS_EVEN + DRM_OF_LVDS_ODD) + return -EINVAL; + + return p1_pt == DRM_OF_LVDS_EVEN ? + DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS : + DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS; +} + /** - * drm_of_lvds_get_dual_link_pixel_order - Get LVDS dual-link pixel order + * drm_of_lvds_get_dual_link_pixel_order - Get LVDS dual-link source pixel order * @port1: First DT port node of the Dual-link LVDS source * @port2: Second DT port node of the Dual-link LVDS source * @@ -387,19 +402,58 @@ int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, if (remote_p2_pt < 0) return remote_p2_pt; - /* - * A valid dual-lVDS bus is found when one remote port is marked with - * "dual-lvds-even-pixels", and the other remote port is marked with - * "dual-lvds-odd-pixels", bail out if the markers are not right. - */ - if (remote_p1_pt + remote_p2_pt != DRM_OF_LVDS_EVEN + DRM_OF_LVDS_ODD) + return __drm_of_lvds_get_dual_link_pixel_order(remote_p1_pt, remote_p2_pt); +} +EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order); + +/** + * drm_of_lvds_get_dual_link_pixel_order_sink - Get LVDS dual-link sink pixel order + * @port1: First DT port node of the Dual-link LVDS sink + * @port2: Second DT port node of the Dual-link LVDS sink + * + * An LVDS dual-link connection is made of two links, with even pixels + * transitting on one link, and odd pixels on the other link. This function + * returns, for two ports of an LVDS dual-link sink, which port shall transmit + * the even and odd pixels, based on the requirements of the sink. + * + * The pixel order is determined from the dual-lvds-even-pixels and + * dual-lvds-odd-pixels properties in the sink's DT port nodes. If those + * properties are not present, or if their usage is not valid, this function + * returns -EINVAL. + * + * If either port is not connected, this function returns -EPIPE. + * + * @port1 and @port2 are typically DT sibling nodes, but may have different + * parents when, for instance, two separate LVDS decoders receive the even and + * odd pixels. + * + * Return: + * * DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS - @port1 receives even pixels and @port2 + * receives odd pixels + * * DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS - @port1 receives odd pixels and @port2 + * receives even pixels + * * -EINVAL - @port1 or @port2 are NULL + * * -EPIPE - when @port1 or @port2 are not connected + */ +int drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1, + struct device_node *port2) +{ + int sink_p1_pt, sink_p2_pt; + + if (!port1 || !port2) return -EINVAL; - return remote_p1_pt == DRM_OF_LVDS_EVEN ? - DRM_LVDS_DUAL_LINK_EVEN_ODD_PIXELS : - DRM_LVDS_DUAL_LINK_ODD_EVEN_PIXELS; + sink_p1_pt = drm_of_lvds_get_port_pixels_type(port1); + if (!sink_p1_pt) + return -EPIPE; + + sink_p2_pt = drm_of_lvds_get_port_pixels_type(port2); + if (!sink_p2_pt) + return -EPIPE; + + return __drm_of_lvds_get_dual_link_pixel_order(sink_p1_pt, sink_p2_pt); } -EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order); +EXPORT_SYMBOL_GPL(drm_of_lvds_get_dual_link_pixel_order_sink); /** * drm_of_lvds_get_data_mapping - Get LVDS data mapping diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h index 02d1cdd7f798..7f0256dae3f1 100644 --- a/include/drm/drm_of.h +++ b/include/drm/drm_of.h @@ -52,6 +52,8 @@ int drm_of_find_panel_or_bridge(const struct device_node *np, struct drm_bridge **bridge); int drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, const struct device_node *port2); +int drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1, + struct device_node *port2); int drm_of_lvds_get_data_mapping(const struct device_node *port); int drm_of_get_data_lanes_count(const struct device_node *endpoint, const unsigned int min, const unsigned int max); @@ -109,6 +111,13 @@ drm_of_lvds_get_dual_link_pixel_order(const struct device_node *port1, return -EINVAL; } +static inline int +drm_of_lvds_get_dual_link_pixel_order_sink(struct device_node *port1, + struct device_node *port2) +{ + return -EINVAL; +} + static inline int drm_of_lvds_get_data_mapping(const struct device_node *port) {