Re: [PATCH v8 6/6] drm_modes: add of_videomode helpers

On Tue, Nov 13, 2012 at 12:35:18PM +0100, Thierry Reding wrote:

On Mon, Nov 12, 2012 at 04:37:06PM +0100, Steffen Trumtrar wrote:
[...]

quoted

+#if IS_ENABLED(CONFIG_OF_VIDEOMODE)
+static void dump_drm_displaymode(struct drm_display_mode *m)
+{
+	pr_debug("drm_displaymode = %d %d %d %d %d %d %d %d %d\n",
+		 m->hdisplay, m->hsync_start, m->hsync_end, m->htotal,
+		 m->vdisplay, m->vsync_start, m->vsync_end, m->vtotal,
+		 m->clock);

I seem to remember a comment to an earlier version of this patch
requesting better formatting of this string. Alternatively you might
want to consider replacing it using drm_mode_debug_printmodeline().

Ah, yes. I only did that for fb_videomode and forgot about this one.
But the existing function is even better.

quoted

diff --git a/include/drm/drmP.h b/include/drm/drmP.h

[...]

quoted

@@ -1457,6 +1458,10 @@ drm_mode_create_from_cmdline_mode(struct drm_device *dev,
 
 extern int videomode_to_display_mode(struct videomode *vm,
 				     struct drm_display_mode *dmode);
+extern int of_get_drm_display_mode(struct device_node *np,
+				   struct drm_display_mode *dmode,
+				   int index);

Also requires either a dummy or protection.

Thierry

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