+static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ struct ast_private *ast = crtc->dev->dev_private;
+ struct drm_plane_state *plane_state;
+ bool succ;
+ struct drm_display_mode adjusted_mode;
+ struct ast_vbios_mode_info vbios_mode;
+
+ if (ast->chip == AST1180) {
+ DRM_ERROR("AST 1180 modesetting not supported\n");
+ return -EINVAL;
+ }
+
+ plane_state = crtc->primary->state;
+
+ if (plane_state && plane_state->fb) {
+ succ = ast_get_vbios_mode_info(plane_state->fb, &state->mode,
+ &adjusted_mode, &vbios_mode);
+ if (!succ)
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static void ast_crtc_helper_atomic_begin(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ struct ast_private *ast = crtc->dev->dev_private;
+
+ ast_open_key(ast);
+}
+
+static void ast_crtc_helper_atomic_flush(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ const struct drm_framebuffer *fb = crtc->primary->state->fb;
+ struct drm_display_mode adjusted_mode;
+ struct ast_vbios_mode_info vbios_mode;
+ bool succ;
+
+ crtc->state->no_vblank = true;
+
+ if (!fb)
+ return;
+
+ ast_set_color_reg(crtc, fb);
+
+ memset(&adjusted_mode, 0, sizeof(adjusted_mode));
+ drm_mode_copy(&adjusted_mode, &crtc->state->adjusted_mode);
+
+ succ = ast_get_vbios_mode_info(fb, &crtc->state->adjusted_mode,
+ &adjusted_mode, &vbios_mode);
+ if (WARN_ON_ONCE(!succ))
+ return;
+
+ ast_set_vbios_color_reg(crtc, fb, &vbios_mode);
+}
+
+static void
+ast_crtc_helper_atomic_enable(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ struct drm_device *dev = crtc->dev;
+ struct ast_private *ast = crtc->dev->dev_private;
+ const struct drm_framebuffer *fb = crtc->primary->state->fb;
+ struct drm_display_mode adjusted_mode;
+ struct ast_vbios_mode_info vbios_mode;
+ bool succ;
+
+ memset(&adjusted_mode, 0, sizeof(adjusted_mode));
+ drm_mode_copy(&adjusted_mode, &crtc->state->adjusted_mode);
+
+ succ = ast_get_vbios_mode_info(fb, &crtc->state->adjusted_mode,
+ &adjusted_mode, &vbios_mode);
+ if (WARN_ON_ONCE(!succ))
+ return;
+
+ ast_set_vbios_mode_reg(crtc, &adjusted_mode, &vbios_mode);
+ ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x06);
+ ast_set_std_reg(crtc, &adjusted_mode, &vbios_mode);
+ ast_set_crtc_reg(crtc, &adjusted_mode, &vbios_mode);
+ ast_set_dclk_reg(dev, &adjusted_mode, &vbios_mode);
+ ast_set_crtthd_reg(crtc);
+ ast_set_sync_reg(dev, &adjusted_mode, &vbios_mode);
+ ast_set_dac_reg(crtc, &adjusted_mode, &vbios_mode);
+
+ ast_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
+}
+
+static void
+ast_crtc_helper_atomic_disable(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ ast_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+}