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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-12-09 15:54:18 +1100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-09 08:24:38 -0800
commitf3179748a157c21d44d929fd3779421ebfbeaa93 (patch)
tree7617077768413c830d80288b510da379ef181811 /drivers/video/aty/radeon_base.c
parentf7a8db89c1f42e504bb12d2ae399cd96f755a7db (diff)
radeonfb: Disable new color expand acceleration unless explicitely enabled
This new color expansion acceleration for radeonfb appears to trigger problems with X on VT switch and suspend/resume on some machines. It might be a problem in the VT layer or in X, but I haven't quite found it yet, so in the meantime, this disables the acceleration by default, reverting to 2.6.27 state. It can be enabled using the "accel_cexp" module parameter or fbdev argument. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/aty/radeon_base.c')
-rw-r--r--drivers/video/aty/radeon_base.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/video/aty/radeon_base.c b/drivers/video/aty/radeon_base.c
index b3ffe8205d2..d5b27f9d374 100644
--- a/drivers/video/aty/radeon_base.c
+++ b/drivers/video/aty/radeon_base.c
@@ -282,6 +282,8 @@ static int backlight = 1;
static int backlight = 0;
#endif
+int accel_cexp = 0;
+
/*
* prototypes
*/
@@ -2520,6 +2522,8 @@ static int __init radeonfb_setup (char *options)
} else if (!strncmp(this_opt, "ignore_devlist", 14)) {
ignore_devlist = 1;
#endif
+ } else if (!strncmp(this_opt, "accel_cexp", 12)) {
+ accel_cexp = 1;
} else
mode_option = this_opt;
}
@@ -2567,6 +2571,8 @@ module_param(monitor_layout, charp, 0);
MODULE_PARM_DESC(monitor_layout, "Specify monitor mapping (like XFree86)");
module_param(force_measure_pll, bool, 0);
MODULE_PARM_DESC(force_measure_pll, "Force measurement of PLL (debug)");
+module_param(accel_cexp, bool, 0);
+MODULE_PARM_DESC(accel_cexp, "Use acceleration engine for color expansion");
#ifdef CONFIG_MTRR
module_param(nomtrr, bool, 0);
MODULE_PARM_DESC(nomtrr, "bool: disable use of MTRR registers");