drm/ast: Move connector mode_valid function to CRTC

The tests in ast_mode_valid() verify the correct resolution for the
supplied mode. This is a limitation of the CRTC, so move the function
to the CRTC helpers. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220207141544.30015-3-tzimmermann@suse.de

drivers/gpu/drm/ast/ast_mode.c

@@ -1005,6 +1005,71 @@ static void ast_crtc_dpms(struct drm_crtc *crtc, int mode)
 	}
 }
 
+static enum drm_mode_status
+ast_crtc_helper_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
+{
+	struct ast_private *ast = to_ast_private(crtc->dev);
+	enum drm_mode_status status;
+	uint32_t jtemp;
+
+	if (ast->support_wide_screen) {
+		if ((mode->hdisplay == 1680) && (mode->vdisplay == 1050))
+			return MODE_OK;
+		if ((mode->hdisplay == 1280) && (mode->vdisplay == 800))
+			return MODE_OK;
+		if ((mode->hdisplay == 1440) && (mode->vdisplay == 900))
+			return MODE_OK;
+		if ((mode->hdisplay == 1360) && (mode->vdisplay == 768))
+			return MODE_OK;
+		if ((mode->hdisplay == 1600) && (mode->vdisplay == 900))
+			return MODE_OK;
+
+		if ((ast->chip == AST2100) || (ast->chip == AST2200) ||
+		    (ast->chip == AST2300) || (ast->chip == AST2400) ||
+		    (ast->chip == AST2500)) {
+			if ((mode->hdisplay == 1920) && (mode->vdisplay == 1080))
+				return MODE_OK;
+
+			if ((mode->hdisplay == 1920) && (mode->vdisplay == 1200)) {
+				jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
+				if (jtemp & 0x01)
+					return MODE_NOMODE;
+				else
+					return MODE_OK;
+			}
+		}
+	}
+
+	status = MODE_NOMODE;
+
+	switch (mode->hdisplay) {
+	case 640:
+		if (mode->vdisplay == 480)
+			status = MODE_OK;
+		break;
+	case 800:
+		if (mode->vdisplay == 600)
+			status = MODE_OK;
+		break;
+	case 1024:
+		if (mode->vdisplay == 768)
+			status = MODE_OK;
+		break;
+	case 1280:
+		if (mode->vdisplay == 1024)
+			status = MODE_OK;
+		break;
+	case 1600:
+		if (mode->vdisplay == 1200)
+			status = MODE_OK;
+		break;
+	default:
+		break;
+	}
+
+	return status;
+}
+
 static int ast_crtc_helper_atomic_check(struct drm_crtc *crtc,
 					struct drm_atomic_state *state)
 {
@@ -1107,6 +1172,7 @@ ast_crtc_helper_atomic_disable(struct drm_crtc *crtc,
 }
 
 static const struct drm_crtc_helper_funcs ast_crtc_helper_funcs = {
+	.mode_valid = ast_crtc_helper_mode_valid,
 	.atomic_check = ast_crtc_helper_atomic_check,
 	.atomic_flush = ast_crtc_helper_atomic_flush,
 	.atomic_enable = ast_crtc_helper_atomic_enable,
@@ -1241,71 +1307,8 @@ static int ast_get_modes(struct drm_connector *connector)
 	return 0;
 }
 
-static enum drm_mode_status ast_mode_valid(struct drm_connector *connector,
-			  struct drm_display_mode *mode)
-{
-	struct ast_private *ast = to_ast_private(connector->dev);
-	int flags = MODE_NOMODE;
-	uint32_t jtemp;
-
-	if (ast->support_wide_screen) {
-		if ((mode->hdisplay == 1680) && (mode->vdisplay == 1050))
-			return MODE_OK;
-		if ((mode->hdisplay == 1280) && (mode->vdisplay == 800))
-			return MODE_OK;
-		if ((mode->hdisplay == 1440) && (mode->vdisplay == 900))
-			return MODE_OK;
-		if ((mode->hdisplay == 1360) && (mode->vdisplay == 768))
-			return MODE_OK;
-		if ((mode->hdisplay == 1600) && (mode->vdisplay == 900))
-			return MODE_OK;
-
-		if ((ast->chip == AST2100) || (ast->chip == AST2200) ||
-		    (ast->chip == AST2300) || (ast->chip == AST2400) ||
-		    (ast->chip == AST2500)) {
-			if ((mode->hdisplay == 1920) && (mode->vdisplay == 1080))
-				return MODE_OK;
-
-			if ((mode->hdisplay == 1920) && (mode->vdisplay == 1200)) {
-				jtemp = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
-				if (jtemp & 0x01)
-					return MODE_NOMODE;
-				else
-					return MODE_OK;
-			}
-		}
-	}
-	switch (mode->hdisplay) {
-	case 640:
-		if (mode->vdisplay == 480)
-			flags = MODE_OK;
-		break;
-	case 800:
-		if (mode->vdisplay == 600)
-			flags = MODE_OK;
-		break;
-	case 1024:
-		if (mode->vdisplay == 768)
-			flags = MODE_OK;
-		break;
-	case 1280:
-		if (mode->vdisplay == 1024)
-			flags = MODE_OK;
-		break;
-	case 1600:
-		if (mode->vdisplay == 1200)
-			flags = MODE_OK;
-		break;
-	default:
-		return flags;
-	}
-
-	return flags;
-}
-
 static const struct drm_connector_helper_funcs ast_connector_helper_funcs = {
 	.get_modes = ast_get_modes,
-	.mode_valid = ast_mode_valid,
 };
 
 static const struct drm_connector_funcs ast_connector_funcs = {