drm/omap: dsi: Hack-fix DSI bus flags

tomba · tomba · commit 6297388e1edd · 2019-02-06T13:39:03.000+02:00
Since commit b4935e3 ("drm/omap: Store bus flags in the omap_dss_device structure") video mode flags are managed by the omapdss (and later omapdrm) core based on bus flags stored in omap_dss_device. This works fine for all devices whose video modes are set by the omapdss and omapdrm core, but breaks DSI operation as the DSI still uses legacy code paths and sets the DISPC timings manually. To fix the problem properly we should move the DSI encoder to the new encoder model. This will however require a considerable amount of work. Restore DSI operation by adding back video mode flags handling in the DSI encoder driver as a hack in the meantime. Fixes: b4935e3 ("drm/omap: Store bus flags in the omap_dss_device structure") Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190111035120.20668-5-laurent.pinchart@ideasonboard.com
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -4751,6 +4751,17 @@ static int dsi_set_config(struct omap_dss_device *dssdev,
 	dsi->vm.flags |= DISPLAY_FLAGS_HSYNC_HIGH;
 	dsi->vm.flags &= ~DISPLAY_FLAGS_VSYNC_LOW;
 	dsi->vm.flags |= DISPLAY_FLAGS_VSYNC_HIGH;
+	/*
+	 * HACK: These flags should be handled through the omap_dss_device bus
+	 * flags, but this will only be possible when the DSI encoder will be
+	 * converted to the omapdrm-managed encoder model.
+	 */
+	dsi->vm.flags &= ~DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+	dsi->vm.flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
+	dsi->vm.flags &= ~DISPLAY_FLAGS_DE_LOW;
+	dsi->vm.flags |= DISPLAY_FLAGS_DE_HIGH;
+	dsi->vm.flags &= ~DISPLAY_FLAGS_SYNC_POSEDGE;
+	dsi->vm.flags |= DISPLAY_FLAGS_SYNC_NEGEDGE;
 
 	dss_mgr_set_timings(&dsi->output, &dsi->vm);
 
