From f085bc335de508b2de913260810e2396fc5b3202 Mon Sep 17 00:00:00 2001
From: Rudolf Cornelissen <rudolf.cornelissen@gmail.com>
Date: Thu, 14 Jul 2005 13:39:31 +0000
Subject: [PATCH] added CRTC timing programming (VGA compatible part only yet).
 Modesetting for resolution works 'partly' now.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13672 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/add-ons/accelerants/via/SetDisplayMode.c |  4 +--
 src/add-ons/accelerants/via/engine/crtc.c    | 30 +++++++++-----------
 2 files changed, 16 insertions(+), 18 deletions(-)

diff --git a/src/add-ons/accelerants/via/SetDisplayMode.c b/src/add-ons/accelerants/via/SetDisplayMode.c
index 4de00a8236..34a94ec04b 100644
--- a/src/add-ons/accelerants/via/SetDisplayMode.c
+++ b/src/add-ons/accelerants/via/SetDisplayMode.c
@@ -227,7 +227,7 @@ status_t SET_DISPLAY_MODE(display_mode *mode_to_set)
 		}
 
 		/* set the timing */
-//		head1_set_timing(target);
+		head1_set_timing(target);
 		/* we do not need to setup CRTC2 here for a head that's in TVout mode */
 //		if (!(target2.flags & TV_BITS))	result = head2_set_timing(target2);
 
@@ -297,7 +297,7 @@ status = B_OK;
 		head1_set_display_start(startadd,colour_depth1);
 
 		/* set the timing */
-//		head1_set_timing(target);
+		head1_set_timing(target);
 
 		//fixme: shut-off the videoPLL if it exists...
 	}
diff --git a/src/add-ons/accelerants/via/engine/crtc.c b/src/add-ons/accelerants/via/engine/crtc.c
index 978b1b52f6..2ebad94f3d 100644
--- a/src/add-ons/accelerants/via/engine/crtc.c
+++ b/src/add-ons/accelerants/via/engine/crtc.c
@@ -119,7 +119,7 @@ status_t eng_crtc_set_timing(display_mode target)
 	 *   wide horizontal stripes. This can be observed earliest on fullscreen overlay,
 	 *   and if it gets worse, also normal desktop output will suffer. The stripes
 	 *   are mainly visible at the left of the screen, over the entire screen height. */
-	if (si->ps.tmds1_active)
+	if (0)//si->ps.tmds1_active)
 	{
 		LOG(2,("CRTC: DFP active: tuning modeline\n"));
 
@@ -193,9 +193,6 @@ status_t eng_crtc_set_timing(display_mode target)
 	/* prevent memory adress counter from being reset (linecomp may not occur) */
 	linecomp = target.timing.v_display;
 
-	/* enable access to primary head */
-	set_crtc_owner(0);
-
 	/* Note for laptop and DVI flatpanels:
 	 * CRTC timing has a seperate set of registers from flatpanel timing.
 	 * The flatpanel timing registers have scaling registers that are used to match
@@ -239,16 +236,16 @@ status_t eng_crtc_set_timing(display_mode target)
 
 		/* horizontal extended regs */
 		//fixme: we reset bit4. is this correct??
-		CRTCW(HEB, (CRTCR(HEB) & 0xe0) |
+/*		CRTCW(HEB, (CRTCR(HEB) & 0xe0) |
 			(
 		 	((htotal & 0x100) >> (8 - 0)) |
 			((hdisp_e & 0x100) >> (8 - 1)) |
 			((hblnk_s & 0x100) >> (8 - 2)) |
 			((hsync_s & 0x100) >> (8 - 3))
 			));
-
+*/
 		/* (mostly) vertical extended regs */
-		CRTCW(LSR,
+/*		CRTCW(LSR,
 			(
 		 	((vtotal & 0x400) >> (10 - 0)) |
 			((vdisp_e & 0x400) >> (10 - 1)) |
@@ -258,8 +255,9 @@ status_t eng_crtc_set_timing(display_mode target)
 			//fixme: we still miss one linecomp bit!?! is this it??
 			//| ((linecomp & 0x400) >> 3)	
 			));
-
+*/
 		/* more vertical extended regs (on GeForce cards only) */
+/*
 		if (si->ps.card_arch >= NV10A)
 		{ 
 			CRTCW(EXTRA,
@@ -271,12 +269,12 @@ status_t eng_crtc_set_timing(display_mode target)
 				//fixme: do we miss another linecomp bit!?!
 				));
 		}
-
+*/
 		/* setup 'large screen' mode */
-		if (target.timing.h_display >= 1280)
-			CRTCW(REPAINT1, (CRTCR(REPAINT1) & 0xfb));
-		else
-			CRTCW(REPAINT1, (CRTCR(REPAINT1) | 0x04));
+//		if (target.timing.h_display >= 1280)
+//			CRTCW(REPAINT1, (CRTCR(REPAINT1) & 0xfb));
+//		else
+//			CRTCW(REPAINT1, (CRTCR(REPAINT1) | 0x04));
 
 		/* setup HSYNC & VSYNC polarity */
 		LOG(2,("CRTC: sync polarity: "));
@@ -308,14 +306,14 @@ status_t eng_crtc_set_timing(display_mode target)
 
 	/* always disable interlaced operation */
 	/* (interlace is supported on upto and including NV10, NV15, and NV30 and up) */
-	CRTCW(INTERLACE, 0xff);
+//	CRTCW(INTERLACE, 0xff);
 
 	/* disable CRTC slaved mode unless a panel is in use */
 	// fixme: this kills TVout when it was in use...
-	if (!si->ps.tmds1_active) CRTCW(PIXEL, (CRTCR(PIXEL) & 0x7f));
+//	if (!si->ps.tmds1_active) CRTCW(PIXEL, (CRTCR(PIXEL) & 0x7f));
 
 	/* setup flatpanel if connected and active */
-	if (si->ps.tmds1_active)
+	if (0)//si->ps.tmds1_active)
 	{
 		uint32 iscale_x, iscale_y;