Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-18 00:53:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

gxfb: set the right registers to tweak the sync polarity

Browse Source 
While running in flatpanel mode it is important to change the FP sync bits (VG
register 0x408) rather then the CRT sync bits (VG register 0x008).  This patch
keeps the CRT sync bits at default when a flatpanel exists.

Note that this also fixes inverted logic; we want CRT_VSYNC_POL to be set (ie,
vsync is normally high) when FB_SYNC_VERT_HIGH_ACT is unset.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jordan Crouse 2008-04-28 02:14:55 -07:00 committed by Linus Torvalds
parent e9338364e6
commit f0a0c1f20f
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/video/geode/video_gx.c
View File

@ -208,7 +208,7 @@ gx_configure_tft(struct fb_info *info)
fp = 0x0F100000; fp = 0x0F100000;
/* Add sync polarity */ /* Configure sync polarity */
if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
fp |= GX_FP_PT2_VSP; fp |= GX_FP_PT2_VSP;
@ -269,11 +269,15 @@ static void gx_configure_display(struct fb_info *info)
/* Enable hsync and vsync. */ /* Enable hsync and vsync. */
dcfg |= GX_DCFG_HSYNC_EN | GX_DCFG_VSYNC_EN; dcfg |= GX_DCFG_HSYNC_EN | GX_DCFG_VSYNC_EN;
/* Sync polarities. */ /* Only change the sync polarities if we are running
if (info->var.sync & FB_SYNC_HOR_HIGH_ACT) * in CRT mode. The FP polarities will be handled in
dcfg |= GX_DCFG_CRT_HSYNC_POL; * gxfb_configure_tft */
if (info->var.sync & FB_SYNC_VERT_HIGH_ACT) if (par->enable_crt) {
dcfg |= GX_DCFG_CRT_VSYNC_POL; if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
dcfg |= GX_DCFG_CRT_HSYNC_POL;
if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
dcfg |= GX_DCFG_CRT_VSYNC_POL;
}
/* Enable the display logic */ /* Enable the display logic */
/* Set up the DACS to blank normally */ /* Set up the DACS to blank normally */