From f3179748a157c21d44d929fd3779421ebfbeaa93 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Tue, 9 Dec 2008 15:54:18 +1100 Subject: [PATCH] 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 Acked-by: David S. Miller Signed-off-by: Linus Torvalds --- drivers/video/aty/radeon_accel.c | 3 ++- drivers/video/aty/radeon_base.c | 6 ++++++ drivers/video/aty/radeonfb.h | 2 ++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/video/aty/radeon_accel.c b/drivers/video/aty/radeon_accel.c index a547e5d4c8bf..8da5e5ab8547 100644 --- a/drivers/video/aty/radeon_accel.c +++ b/drivers/video/aty/radeon_accel.c @@ -256,7 +256,8 @@ void radeonfb_imageblit(struct fb_info *info, const struct fb_image *image) return; /* We only do 1 bpp color expansion for now */ - if (info->flags & FBINFO_HWACCEL_DISABLED || image->depth != 1) + if (!accel_cexp || + (info->flags & FBINFO_HWACCEL_DISABLED) || image->depth != 1) goto fallback; /* Fallback if running out of the screen. We may do clipping diff --git a/drivers/video/aty/radeon_base.c b/drivers/video/aty/radeon_base.c index b3ffe8205d2b..d5b27f9d374d 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"); diff --git a/drivers/video/aty/radeonfb.h b/drivers/video/aty/radeonfb.h index ea0b5b47acaf..974ca6d86540 100644 --- a/drivers/video/aty/radeonfb.h +++ b/drivers/video/aty/radeonfb.h @@ -638,4 +638,6 @@ static inline void radeonfb_bl_init(struct radeonfb_info *rinfo) {} static inline void radeonfb_bl_exit(struct radeonfb_info *rinfo) {} #endif +extern int accel_cexp; + #endif /* __RADEONFB_H__ */