From: Jeff Garzik Date: Fri, 8 Dec 2006 10:40:17 +0000 (-0800) Subject: [PATCH] atyfb, rivafb: minor fixes X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fd717689f46436fc212882ddc6e02a20be920634;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git [PATCH] atyfb, rivafb: minor fixes aty128fb: return an error in the unlikely event that we cannot calculate some key PLL info rivafb: * call CalcStateExt() directly, rather than via function pointers, since CalcStateExt() is the only value ever assigned to ->CalcStateExt(). * propagate error return back from CalcVClock() through callers Signed-off-by: Jeff Garzik Cc: "Antonino A. Daplas" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/video/aty/aty128fb.c b/drivers/video/aty/aty128fb.c index 276a21530b95..3feddf89d100 100644 --- a/drivers/video/aty/aty128fb.c +++ b/drivers/video/aty/aty128fb.c @@ -1333,6 +1333,8 @@ static int aty128_var_to_pll(u32 period_in_ps, struct aty128_pll *pll, if (vclk * 12 < c.ppll_min) vclk = c.ppll_min/12; + pll->post_divider = -1; + /* now, find an acceptable divider */ for (i = 0; i < sizeof(post_dividers); i++) { output_freq = post_dividers[i] * vclk; @@ -1342,6 +1344,9 @@ static int aty128_var_to_pll(u32 period_in_ps, struct aty128_pll *pll, } } + if (pll->post_divider < 0) + return -EINVAL; + /* calculate feedback divider */ n = c.ref_divider * output_freq; d = c.ref_clk; diff --git a/drivers/video/riva/fbdev.c b/drivers/video/riva/fbdev.c index c6f86859399c..345e8b1c1af8 100644 --- a/drivers/video/riva/fbdev.c +++ b/drivers/video/riva/fbdev.c @@ -740,11 +740,12 @@ static void riva_load_state(struct riva_par *par, struct riva_regs *regs) * CALLED FROM: * rivafb_set_par() */ -static void riva_load_video_mode(struct fb_info *info) +static int riva_load_video_mode(struct fb_info *info) { int bpp, width, hDisplaySize, hDisplay, hStart, hEnd, hTotal, height, vDisplay, vStart, vEnd, vTotal, dotClock; int hBlankStart, hBlankEnd, vBlankStart, vBlankEnd; + int rc; struct riva_par *par = info->par; struct riva_regs newmode; @@ -850,8 +851,10 @@ static void riva_load_video_mode(struct fb_info *info) else newmode.misc_output |= 0x80; - par->riva.CalcStateExt(&par->riva, &newmode.ext, bpp, width, - hDisplaySize, height, dotClock); + rc = CalcStateExt(&par->riva, &newmode.ext, bpp, width, + hDisplaySize, height, dotClock); + if (rc) + goto out; newmode.ext.scale = NV_RD32(par->riva.PRAMDAC, 0x00000848) & 0xfff000ff; @@ -883,8 +886,12 @@ static void riva_load_video_mode(struct fb_info *info) par->current_state = newmode; riva_load_state(par, &par->current_state); par->riva.LockUnlock(&par->riva, 0); /* important for HW cursor */ + +out: rivafb_blank(FB_BLANK_UNBLANK, info); NVTRACE_LEAVE(); + + return rc; } static void riva_update_var(struct fb_var_screeninfo *var, struct fb_videomode *modedb) @@ -1252,12 +1259,15 @@ static int rivafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) static int rivafb_set_par(struct fb_info *info) { struct riva_par *par = info->par; + int rc = 0; NVTRACE_ENTER(); /* vgaHWunlock() + riva unlock (0x7F) */ CRTCout(par, 0x11, 0xFF); par->riva.LockUnlock(&par->riva, 0); - riva_load_video_mode(info); + rc = riva_load_video_mode(info); + if (rc) + goto out; if(!(info->flags & FBINFO_HWACCEL_DISABLED)) riva_setup_accel(info); @@ -1270,8 +1280,10 @@ static int rivafb_set_par(struct fb_info *info) info->pixmap.scan_align = 1; else info->pixmap.scan_align = 4; + +out: NVTRACE_LEAVE(); - return 0; + return rc; } /** diff --git a/drivers/video/riva/riva_hw.c b/drivers/video/riva/riva_hw.c index b6f8690b96c9..e0b8c521cc9c 100644 --- a/drivers/video/riva/riva_hw.c +++ b/drivers/video/riva/riva_hw.c @@ -1227,7 +1227,7 @@ static int CalcVClock * Calculate extended mode parameters (SVGA) and save in a * mode state structure. */ -static void CalcStateExt +int CalcStateExt ( RIVA_HW_INST *chip, RIVA_HW_STATE *state, @@ -1249,7 +1249,8 @@ static void CalcStateExt * Extended RIVA registers. */ pixelDepth = (bpp + 1)/8; - CalcVClock(dotClock, &VClk, &m, &n, &p, chip); + if (!CalcVClock(dotClock, &VClk, &m, &n, &p, chip)) + return -EINVAL; switch (chip->Architecture) { @@ -1327,6 +1328,8 @@ static void CalcStateExt state->pitch1 = state->pitch2 = state->pitch3 = pixelDepth * width; + + return 0; } /* * Load fixed function state and pre-calculated/stored state. @@ -2026,7 +2029,6 @@ static void nv3GetConfig */ chip->Busy = nv3Busy; chip->ShowHideCursor = ShowHideCursor; - chip->CalcStateExt = CalcStateExt; chip->LoadStateExt = LoadStateExt; chip->UnloadStateExt = UnloadStateExt; chip->SetStartAddress = SetStartAddress3; @@ -2084,7 +2086,6 @@ static void nv4GetConfig */ chip->Busy = nv4Busy; chip->ShowHideCursor = ShowHideCursor; - chip->CalcStateExt = CalcStateExt; chip->LoadStateExt = LoadStateExt; chip->UnloadStateExt = UnloadStateExt; chip->SetStartAddress = SetStartAddress; @@ -2186,7 +2187,6 @@ static void nv10GetConfig */ chip->Busy = nv10Busy; chip->ShowHideCursor = ShowHideCursor; - chip->CalcStateExt = CalcStateExt; chip->LoadStateExt = LoadStateExt; chip->UnloadStateExt = UnloadStateExt; chip->SetStartAddress = SetStartAddress; diff --git a/drivers/video/riva/riva_hw.h b/drivers/video/riva/riva_hw.h index a1e71a626df2..c2769f73e0b2 100644 --- a/drivers/video/riva/riva_hw.h +++ b/drivers/video/riva/riva_hw.h @@ -463,7 +463,6 @@ typedef struct _riva_hw_inst * Common chip functions. */ int (*Busy)(struct _riva_hw_inst *); - void (*CalcStateExt)(struct _riva_hw_inst *,struct _riva_hw_state *,int,int,int,int,int); void (*LoadStateExt)(struct _riva_hw_inst *,struct _riva_hw_state *); void (*UnloadStateExt)(struct _riva_hw_inst *,struct _riva_hw_state *); void (*SetStartAddress)(struct _riva_hw_inst *,U032); @@ -528,6 +527,22 @@ typedef struct _riva_hw_state U032 pitch2; U032 pitch3; } RIVA_HW_STATE; + +/* + * function prototypes + */ + +extern int CalcStateExt +( + RIVA_HW_INST *chip, + RIVA_HW_STATE *state, + int bpp, + int width, + int hDisplaySize, + int height, + int dotClock +); + /* * External routines. */