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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: b51e69dc-9d62-4ed1-a6d5-08dba1f7e339 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7046.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Aug 2023 03:37:04.6711 (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: HcWkeLMGkKQyhz1QyOYnhMcORIVcY+ydWjRZL0Id27f7Kjbo93Ph8KzrwyXI0lsz0TWndz9etTRJFxg2FJKg7g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR04MB7758 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230820_203707_643453_5AA2B880 X-CRM114-Status: GOOD ( 12.99 ) 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 The DATAEN_ACTIVE_LOW bit in DSI_DPI_CFG_POL register is set to zero, so set the DRM_BUS_FLAG_DE_HIGH flag in input_bus_cfg.flags. It appears that the DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE flag also makes sense, so set it in input_bus_cfg.flags too. With this patch, the flags set by drm_atomic_bridge_propagate_bus_flags() are overridden (see comment in that function) in case any downstream bridges propagates invalid flags to this bridge. A real problematic case is to connect a RM67191 MIPI DSI panel whose driver sets DRM_BUS_FLAG_DE_LOW and DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE bus flags. Signed-off-by: Liu Ying Reviewed-by: Robert Foss --- v1->v3: * No change. drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index 945d46a76995..ed9288a9c444 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -567,6 +568,17 @@ dw_mipi_dsi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, return input_fmts; } +static int dw_mipi_dsi_bridge_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + bridge_state->input_bus_cfg.flags = + DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE; + + return 0; +} + static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi) { u32 val; @@ -1036,6 +1048,7 @@ static const struct drm_bridge_funcs dw_mipi_dsi_bridge_funcs = { .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_get_input_bus_fmts = dw_mipi_dsi_bridge_atomic_get_input_bus_fmts, + .atomic_check = dw_mipi_dsi_bridge_atomic_check, .atomic_reset = drm_atomic_helper_bridge_reset, .atomic_pre_enable = dw_mipi_dsi_bridge_atomic_pre_enable, .atomic_enable = dw_mipi_dsi_bridge_atomic_enable,