From 47f8361c3a64834587e54507653d8d5b258c2530 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@guitar.keithp.com>
Date: Mon, 5 Mar 2007 22:07:01 -0800
Subject: [PATCH] Add xf86SetDesiredModes to apply desired modes to crtcs.

xf86SetDesiredModes applies the desired modes to each crtc (as selected by
xf86InitialConfiguration initially and modified by successful mode settings
afterwards). For crtcs without a desired mode, pScrn->currentMode is used to
select something workable.
(cherry picked from commit bcade98ccaa18298d844a606cb44271f0254c185)
---
 hw/xfree86/modes/xf86Crtc.c   | 57 +++++++++++++++++++++++++++++++++++
 hw/xfree86/modes/xf86Crtc.h   |  8 +++++
 hw/xfree86/modes/xf86Rename.h |  3 ++
 3 files changed, 68 insertions(+)

diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
index 3d28293c8d..c38da62ced 100644
--- a/hw/xfree86/modes/xf86Crtc.c
+++ b/hw/xfree86/modes/xf86Crtc.c
@@ -1542,6 +1542,63 @@ xf86InitialConfiguration (ScrnInfoPtr scrn, Bool canGrow)
     return TRUE;
 }
 
+/*
+ * Using the desired mode information in each crtc, set
+ * modes (used in EnterVT functions, or at server startup)
+ */
+
+Bool
+xf86SetDesiredModes (ScrnInfoPtr scrn)
+{
+    xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(scrn);
+    int			c;
+
+    for (c = 0; c < config->num_crtc; c++)
+    {
+	xf86CrtcPtr	crtc = config->crtc[c];
+	xf86OutputPtr	output = NULL;
+	int		o;
+
+	if (config->output[config->compat_output]->crtc == crtc)
+	    output = config->output[config->compat_output];
+	else
+	{
+	    for (o = 0; o < config->num_output; o++)
+		if (config->output[o]->crtc == crtc)
+		{
+		    output = config->output[o];
+		    break;
+		}
+	}
+	/*
+	 * Skip disabled crtcs
+	 */
+	if (!output)
+	    continue;
+
+	/* Mark that we'll need to re-set the mode for sure */
+	memset(&crtc->mode, 0, sizeof(crtc->mode));
+	if (!crtc->desiredMode.CrtcHDisplay)
+	{
+	    DisplayModePtr  mode = xf86OutputFindClosestMode (output, scrn->currentMode);
+
+	    if (!mode)
+		return FALSE;
+	    crtc->desiredMode = *mode;
+	    crtc->desiredRotation = RR_Rotate_0;
+	    crtc->desiredX = 0;
+	    crtc->desiredY = 0;
+	}
+
+	if (!xf86CrtcSetMode (crtc, &crtc->desiredMode, crtc->desiredRotation,
+			      crtc->desiredX, crtc->desiredY))
+	    return FALSE;
+    }
+
+    xf86DisableUnusedFunctions(scrn);
+    return TRUE;
+}
+
 /**
  * In the current world order, there are lists of modes per output, which may
  * or may not include the mode that was asked to be set by XFree86's mode
diff --git a/hw/xfree86/modes/xf86Crtc.h b/hw/xfree86/modes/xf86Crtc.h
index 56c7769cf4..062a2dbecf 100644
--- a/hw/xfree86/modes/xf86Crtc.h
+++ b/hw/xfree86/modes/xf86Crtc.h
@@ -644,4 +644,12 @@ xf86CrtcSetScreenSubpixelOrder (ScreenPtr pScreen);
 char *
 xf86ConnectorGetName(xf86ConnectorType connector);
 
+/*
+ * Using the desired mode information in each crtc, set
+ * modes (used in EnterVT functions, or at server startup)
+ */
+
+Bool
+xf86SetDesiredModes (ScrnInfoPtr pScrn);
+
 #endif /* _XF86CRTC_H_ */
diff --git a/hw/xfree86/modes/xf86Rename.h b/hw/xfree86/modes/xf86Rename.h
index 6cfa5caa19..eae6d64d5c 100644
--- a/hw/xfree86/modes/xf86Rename.h
+++ b/hw/xfree86/modes/xf86Rename.h
@@ -76,5 +76,8 @@
 #define xf86CrtcSetScreenSubpixelOrder XF86NAME(xf86CrtcSetScreenSubpixelOrder)
 #define xf86ModeWidth XF86NAME(xf86ModeWidth)
 #define xf86ModeHeight XF86NAME(xf86ModeHeight)
+#define xf86OutputFindClosestMode XF86NAME(xf86OutputFindClosestMode)
+#define xf86SetSingleMode XF86NAME(xf86SetSingleMode)
+#define xf86SetDesiredModes XF86NAME(xf86SetDesiredModes)
 
 #endif /* _XF86RENAME_H_ */