| Message ID | 20230512102444.5438-2-tzimmermann@suse.de (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | fbdev: Move framebuffer I/O helpers to <asm/fb.h> | expand |
From: Thomas Zimmermann > Sent: 12 May 2023 11:25 > > Cast I/O offsets to pointers to use them with I/O functions. The I/O > functions expect pointers of type 'volatile void __iomem *', but the > offsets are plain integers. Build warnings are > > ../drivers/video/fbdev/hitfb.c: In function 'hitfb_accel_wait': > ../arch/x86/include/asm/hd64461.h:18:33: warning: passing argument 1 of 'fb_readw' makes pointer > from integer without a cast [-Wint-conversion] > 18 | #define HD64461_IO_OFFSET(x) (HD64461_IOBASE + (x)) > | ^~~~~~~~~~~~~~~~~~~~~~ ... > 52 | static inline u16 fb_readw(const volatile void __iomem *addr) > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ > > This patch only fixes the build warnings. It's not clear if the I/O > offsets can legally be passed to the I/O helpers. It was apparently > broken in 2007 when custom inw()/outw() helpers got removed by > commit 34a780a0afeb ("sh: hp6xx pata_platform support."). Fixing the > driver would require setting the I/O base address. Did you try changing the definition of HD64461_IOBASE to include a (volatile void __iomem *) cast? A lot less churn... I'm guessing that 'sh' deosn't have in/out instructions so this is something that is always mapped at a fixed kernel virtual address? David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
Hi Am 12.05.23 um 13:16 schrieb David Laight: > From: Thomas Zimmermann >> Sent: 12 May 2023 11:25 >> >> Cast I/O offsets to pointers to use them with I/O functions. The I/O >> functions expect pointers of type 'volatile void __iomem *', but the >> offsets are plain integers. Build warnings are >> >> ../drivers/video/fbdev/hitfb.c: In function 'hitfb_accel_wait': >> ../arch/x86/include/asm/hd64461.h:18:33: warning: passing argument 1 of 'fb_readw' makes pointer >> from integer without a cast [-Wint-conversion] >> 18 | #define HD64461_IO_OFFSET(x) (HD64461_IOBASE + (x)) >> | ^~~~~~~~~~~~~~~~~~~~~~ > ... >> 52 | static inline u16 fb_readw(const volatile void __iomem *addr) >> | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ >> >> This patch only fixes the build warnings. It's not clear if the I/O >> offsets can legally be passed to the I/O helpers. It was apparently >> broken in 2007 when custom inw()/outw() helpers got removed by >> commit 34a780a0afeb ("sh: hp6xx pata_platform support."). Fixing the >> driver would require setting the I/O base address. > > Did you try changing the definition of HD64461_IOBASE to include > a (volatile void __iomem *) cast? I thought about it, but didn't try it. I didn't want bend the meaning of OFFSET and IOBASE too much. They sound like integer constants to me. > A lot less churn... > > I'm guessing that 'sh' deosn't have in/out instructions so this > is something that is always mapped at a fixed kernel virtual address? No idea. I cannot try the driver and was only able to build it by hacking up something that makes COMPILE_TEST work. The current patch seemed like the safest bet, even with the churn. Best regards Thomas > > David > > - > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK > Registration No: 1397386 (Wales) >
On 5/12/23 12:24, Thomas Zimmermann wrote: > Cast I/O offsets to pointers to use them with I/O functions. The I/O > functions expect pointers of type 'volatile void __iomem *', but the > offsets are plain integers. Build warnings are > > ../drivers/video/fbdev/hitfb.c: In function 'hitfb_accel_wait': > ../arch/x86/include/asm/hd64461.h:18:33: warning: passing argument 1 of 'fb_readw' makes pointer from integer without a cast [-Wint-conversion] > 18 | #define HD64461_IO_OFFSET(x) (HD64461_IOBASE + (x)) > | ^~~~~~~~~~~~~~~~~~~~~~ > | | > | unsigned int > ../arch/x86/include/asm/hd64461.h:93:33: note: in expansion of macro 'HD64461_IO_OFFSET' > 93 | #define HD64461_GRCFGR HD64461_IO_OFFSET(0x1044) /* Accelerator Configuration Register */ > | ^~~~~~~~~~~~~~~~~ > ../drivers/video/fbdev/hitfb.c:47:25: note: in expansion of macro 'HD64461_GRCFGR' > 47 | while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ; > | ^~~~~~~~~~~~~~ > In file included from ../arch/x86/include/asm/fb.h:15, > from ../include/linux/fb.h:19, > from ../drivers/video/fbdev/hitfb.c:22: > ../include/asm-generic/fb.h:52:57: note: expected 'const volatile void *' but argument is of type 'unsigned int' > 52 | static inline u16 fb_readw(const volatile void __iomem *addr) > | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ > > This patch only fixes the build warnings. It's not clear if the I/O > offsets can legally be passed to the I/O helpers. It was apparently > broken in 2007 when custom inw()/outw() helpers got removed by > commit 34a780a0afeb ("sh: hp6xx pata_platform support."). Fixing the > driver would require setting the I/O base address. I think your patch is the best you can do for now... So... Acked-by: Helge Deller <deller@gmx.de> Thanks! Helge > Reported-by: kernel test robot <lkp@intel.com> > Closes: https://lore.kernel.org/oe-kbuild-all/202305102136.eMjTSPwH-lkp@intel.com/ > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> > Cc: Artur Rojek <contact@artur-rojek.eu> > --- > drivers/video/fbdev/hitfb.c | 122 ++++++++++++++++++++---------------- > 1 file changed, 69 insertions(+), 53 deletions(-) > > diff --git a/drivers/video/fbdev/hitfb.c b/drivers/video/fbdev/hitfb.c > index 3033f5056976..7737923b7a0a 100644 > --- a/drivers/video/fbdev/hitfb.c > +++ b/drivers/video/fbdev/hitfb.c > @@ -42,17 +42,33 @@ static struct fb_fix_screeninfo hitfb_fix = { > .accel = FB_ACCEL_NONE, > }; > > +static volatile void __iomem *hitfb_offset_to_addr(unsigned int offset) > +{ > + return (__force volatile void __iomem *)(uintptr_t)offset; > +} > + > +static u16 hitfb_readw(unsigned int offset) > +{ > + return fb_readw(hitfb_offset_to_addr(offset)); > +} > + > +static void hitfb_writew(u16 value, unsigned int offset) > +{ > + fb_writew(value, hitfb_offset_to_addr(offset)); > +} > + > static inline void hitfb_accel_wait(void) > { > - while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ; > + while (hitfb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) > + ; > } > > static inline void hitfb_accel_start(int truecolor) > { > if (truecolor) { > - fb_writew(6, HD64461_GRCFGR); > + hitfb_writew(6, HD64461_GRCFGR); > } else { > - fb_writew(7, HD64461_GRCFGR); > + hitfb_writew(7, HD64461_GRCFGR); > } > } > > @@ -63,11 +79,11 @@ static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy, > if (truecolor) > saddr <<= 1; > > - fb_writew(width-1, HD64461_BBTDWR); > - fb_writew(height-1, HD64461_BBTDHR); > + hitfb_writew(width-1, HD64461_BBTDWR); > + hitfb_writew(height-1, HD64461_BBTDHR); > > - fb_writew(saddr & 0xffff, HD64461_BBTDSARL); > - fb_writew(saddr >> 16, HD64461_BBTDSARH); > + hitfb_writew(saddr & 0xffff, HD64461_BBTDSARL); > + hitfb_writew(saddr >> 16, HD64461_BBTDSARH); > > } > > @@ -80,7 +96,7 @@ static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx, > > height--; > width--; > - fb_writew(rop, HD64461_BBTROPR); > + hitfb_writew(rop, HD64461_BBTROPR); > if ((sy < dy) || ((sy == dy) && (sx <= dx))) { > saddr = WIDTH * (sy + height) + sx + width; > daddr = WIDTH * (dy + height) + dx + width; > @@ -91,32 +107,32 @@ static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx, > maddr = > (((width >> 4) + 1) * (height + 1) - 1) * 2; > > - fb_writew((1 << 5) | 1, HD64461_BBTMDR); > + hitfb_writew((1 << 5) | 1, HD64461_BBTMDR); > } else > - fb_writew(1, HD64461_BBTMDR); > + hitfb_writew(1, HD64461_BBTMDR); > } else { > saddr = WIDTH * sy + sx; > daddr = WIDTH * dy + dx; > if (mask_addr) { > - fb_writew((1 << 5), HD64461_BBTMDR); > + hitfb_writew((1 << 5), HD64461_BBTMDR); > } else { > - fb_writew(0, HD64461_BBTMDR); > + hitfb_writew(0, HD64461_BBTMDR); > } > } > if (truecolor) { > saddr <<= 1; > daddr <<= 1; > } > - fb_writew(width, HD64461_BBTDWR); > - fb_writew(height, HD64461_BBTDHR); > - fb_writew(saddr & 0xffff, HD64461_BBTSSARL); > - fb_writew(saddr >> 16, HD64461_BBTSSARH); > - fb_writew(daddr & 0xffff, HD64461_BBTDSARL); > - fb_writew(daddr >> 16, HD64461_BBTDSARH); > + hitfb_writew(width, HD64461_BBTDWR); > + hitfb_writew(height, HD64461_BBTDHR); > + hitfb_writew(saddr & 0xffff, HD64461_BBTSSARL); > + hitfb_writew(saddr >> 16, HD64461_BBTSSARH); > + hitfb_writew(daddr & 0xffff, HD64461_BBTDSARL); > + hitfb_writew(daddr >> 16, HD64461_BBTDSARH); > if (mask_addr) { > maddr += mask_addr; > - fb_writew(maddr & 0xffff, HD64461_BBTMARL); > - fb_writew(maddr >> 16, HD64461_BBTMARH); > + hitfb_writew(maddr & 0xffff, HD64461_BBTMARL); > + hitfb_writew(maddr >> 16, HD64461_BBTMARH); > } > hitfb_accel_start(truecolor); > } > @@ -127,17 +143,17 @@ static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect) > cfb_fillrect(p, rect); > else { > hitfb_accel_wait(); > - fb_writew(0x00f0, HD64461_BBTROPR); > - fb_writew(16, HD64461_BBTMDR); > + hitfb_writew(0x00f0, HD64461_BBTROPR); > + hitfb_writew(16, HD64461_BBTMDR); > > if (p->var.bits_per_pixel == 16) { > - fb_writew(((u32 *) (p->pseudo_palette))[rect->color], > + hitfb_writew(((u32 *) (p->pseudo_palette))[rect->color], > HD64461_GRSCR); > hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width, > rect->height); > hitfb_accel_start(1); > } else { > - fb_writew(rect->color, HD64461_GRSCR); > + hitfb_writew(rect->color, HD64461_GRSCR); > hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width, > rect->height); > hitfb_accel_start(0); > @@ -162,7 +178,7 @@ static int hitfb_pan_display(struct fb_var_screeninfo *var, > if (xoffset != 0) > return -EINVAL; > > - fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR); > + hitfb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR); > > return 0; > } > @@ -172,33 +188,33 @@ int hitfb_blank(int blank_mode, struct fb_info *info) > unsigned short v; > > if (blank_mode) { > - v = fb_readw(HD64461_LDR1); > + v = hitfb_readw(HD64461_LDR1); > v &= ~HD64461_LDR1_DON; > - fb_writew(v, HD64461_LDR1); > + hitfb_writew(v, HD64461_LDR1); > > - v = fb_readw(HD64461_LCDCCR); > + v = hitfb_readw(HD64461_LCDCCR); > v |= HD64461_LCDCCR_MOFF; > - fb_writew(v, HD64461_LCDCCR); > + hitfb_writew(v, HD64461_LCDCCR); > > - v = fb_readw(HD64461_STBCR); > + v = hitfb_readw(HD64461_STBCR); > v |= HD64461_STBCR_SLCDST; > - fb_writew(v, HD64461_STBCR); > + hitfb_writew(v, HD64461_STBCR); > } else { > - v = fb_readw(HD64461_STBCR); > + v = hitfb_readw(HD64461_STBCR); > v &= ~HD64461_STBCR_SLCDST; > - fb_writew(v, HD64461_STBCR); > + hitfb_writew(v, HD64461_STBCR); > > - v = fb_readw(HD64461_LCDCCR); > + v = hitfb_readw(HD64461_LCDCCR); > v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ); > - fb_writew(v, HD64461_LCDCCR); > + hitfb_writew(v, HD64461_LCDCCR); > > do { > - v = fb_readw(HD64461_LCDCCR); > + v = hitfb_readw(HD64461_LCDCCR); > } while(v&HD64461_LCDCCR_STBACK); > > - v = fb_readw(HD64461_LDR1); > + v = hitfb_readw(HD64461_LDR1); > v |= HD64461_LDR1_DON; > - fb_writew(v, HD64461_LDR1); > + hitfb_writew(v, HD64461_LDR1); > } > return 0; > } > @@ -211,10 +227,10 @@ static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green, > > switch (info->var.bits_per_pixel) { > case 8: > - fb_writew(regno << 8, HD64461_CPTWAR); > - fb_writew(red >> 10, HD64461_CPTWDR); > - fb_writew(green >> 10, HD64461_CPTWDR); > - fb_writew(blue >> 10, HD64461_CPTWDR); > + hitfb_writew(regno << 8, HD64461_CPTWAR); > + hitfb_writew(red >> 10, HD64461_CPTWDR); > + hitfb_writew(green >> 10, HD64461_CPTWDR); > + hitfb_writew(blue >> 10, HD64461_CPTWDR); > break; > case 16: > if (regno >= 16) > @@ -302,11 +318,11 @@ static int hitfb_set_par(struct fb_info *info) > break; > } > > - fb_writew(info->fix.line_length, HD64461_LCDCLOR); > - ldr3 = fb_readw(HD64461_LDR3); > + hitfb_writew(info->fix.line_length, HD64461_LCDCLOR); > + ldr3 = hitfb_readw(HD64461_LDR3); > ldr3 &= ~15; > ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8; > - fb_writew(ldr3, HD64461_LDR3); > + hitfb_writew(ldr3, HD64461_LDR3); > return 0; > } > > @@ -337,9 +353,9 @@ static int hitfb_probe(struct platform_device *dev) > hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000); > hitfb_fix.smem_len = 512 * 1024; > > - lcdclor = fb_readw(HD64461_LCDCLOR); > - ldvndr = fb_readw(HD64461_LDVNDR); > - ldr3 = fb_readw(HD64461_LDR3); > + lcdclor = hitfb_readw(HD64461_LCDCLOR); > + ldvndr = hitfb_readw(HD64461_LDVNDR); > + ldr3 = hitfb_readw(HD64461_LDR3); > > switch (ldr3 & 15) { > default: > @@ -429,9 +445,9 @@ static int hitfb_suspend(struct device *dev) > u16 v; > > hitfb_blank(1,0); > - v = fb_readw(HD64461_STBCR); > + v = hitfb_readw(HD64461_STBCR); > v |= HD64461_STBCR_SLCKE_IST; > - fb_writew(v, HD64461_STBCR); > + hitfb_writew(v, HD64461_STBCR); > > return 0; > } > @@ -440,12 +456,12 @@ static int hitfb_resume(struct device *dev) > { > u16 v; > > - v = fb_readw(HD64461_STBCR); > + v = hitfb_readw(HD64461_STBCR); > v &= ~HD64461_STBCR_SLCKE_OST; > msleep(100); > - v = fb_readw(HD64461_STBCR); > + v = hitfb_readw(HD64461_STBCR); > v &= ~HD64461_STBCR_SLCKE_IST; > - fb_writew(v, HD64461_STBCR); > + hitfb_writew(v, HD64461_STBCR); > hitfb_blank(0,0); > > return 0;
diff --git a/drivers/video/fbdev/hitfb.c b/drivers/video/fbdev/hitfb.c index 3033f5056976..7737923b7a0a 100644 --- a/drivers/video/fbdev/hitfb.c +++ b/drivers/video/fbdev/hitfb.c @@ -42,17 +42,33 @@ static struct fb_fix_screeninfo hitfb_fix = { .accel = FB_ACCEL_NONE, }; +static volatile void __iomem *hitfb_offset_to_addr(unsigned int offset) +{ + return (__force volatile void __iomem *)(uintptr_t)offset; +} + +static u16 hitfb_readw(unsigned int offset) +{ + return fb_readw(hitfb_offset_to_addr(offset)); +} + +static void hitfb_writew(u16 value, unsigned int offset) +{ + fb_writew(value, hitfb_offset_to_addr(offset)); +} + static inline void hitfb_accel_wait(void) { - while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ; + while (hitfb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) + ; } static inline void hitfb_accel_start(int truecolor) { if (truecolor) { - fb_writew(6, HD64461_GRCFGR); + hitfb_writew(6, HD64461_GRCFGR); } else { - fb_writew(7, HD64461_GRCFGR); + hitfb_writew(7, HD64461_GRCFGR); } } @@ -63,11 +79,11 @@ static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy, if (truecolor) saddr <<= 1; - fb_writew(width-1, HD64461_BBTDWR); - fb_writew(height-1, HD64461_BBTDHR); + hitfb_writew(width-1, HD64461_BBTDWR); + hitfb_writew(height-1, HD64461_BBTDHR); - fb_writew(saddr & 0xffff, HD64461_BBTDSARL); - fb_writew(saddr >> 16, HD64461_BBTDSARH); + hitfb_writew(saddr & 0xffff, HD64461_BBTDSARL); + hitfb_writew(saddr >> 16, HD64461_BBTDSARH); } @@ -80,7 +96,7 @@ static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx, height--; width--; - fb_writew(rop, HD64461_BBTROPR); + hitfb_writew(rop, HD64461_BBTROPR); if ((sy < dy) || ((sy == dy) && (sx <= dx))) { saddr = WIDTH * (sy + height) + sx + width; daddr = WIDTH * (dy + height) + dx + width; @@ -91,32 +107,32 @@ static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx, maddr = (((width >> 4) + 1) * (height + 1) - 1) * 2; - fb_writew((1 << 5) | 1, HD64461_BBTMDR); + hitfb_writew((1 << 5) | 1, HD64461_BBTMDR); } else - fb_writew(1, HD64461_BBTMDR); + hitfb_writew(1, HD64461_BBTMDR); } else { saddr = WIDTH * sy + sx; daddr = WIDTH * dy + dx; if (mask_addr) { - fb_writew((1 << 5), HD64461_BBTMDR); + hitfb_writew((1 << 5), HD64461_BBTMDR); } else { - fb_writew(0, HD64461_BBTMDR); + hitfb_writew(0, HD64461_BBTMDR); } } if (truecolor) { saddr <<= 1; daddr <<= 1; } - fb_writew(width, HD64461_BBTDWR); - fb_writew(height, HD64461_BBTDHR); - fb_writew(saddr & 0xffff, HD64461_BBTSSARL); - fb_writew(saddr >> 16, HD64461_BBTSSARH); - fb_writew(daddr & 0xffff, HD64461_BBTDSARL); - fb_writew(daddr >> 16, HD64461_BBTDSARH); + hitfb_writew(width, HD64461_BBTDWR); + hitfb_writew(height, HD64461_BBTDHR); + hitfb_writew(saddr & 0xffff, HD64461_BBTSSARL); + hitfb_writew(saddr >> 16, HD64461_BBTSSARH); + hitfb_writew(daddr & 0xffff, HD64461_BBTDSARL); + hitfb_writew(daddr >> 16, HD64461_BBTDSARH); if (mask_addr) { maddr += mask_addr; - fb_writew(maddr & 0xffff, HD64461_BBTMARL); - fb_writew(maddr >> 16, HD64461_BBTMARH); + hitfb_writew(maddr & 0xffff, HD64461_BBTMARL); + hitfb_writew(maddr >> 16, HD64461_BBTMARH); } hitfb_accel_start(truecolor); } @@ -127,17 +143,17 @@ static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect) cfb_fillrect(p, rect); else { hitfb_accel_wait(); - fb_writew(0x00f0, HD64461_BBTROPR); - fb_writew(16, HD64461_BBTMDR); + hitfb_writew(0x00f0, HD64461_BBTROPR); + hitfb_writew(16, HD64461_BBTMDR); if (p->var.bits_per_pixel == 16) { - fb_writew(((u32 *) (p->pseudo_palette))[rect->color], + hitfb_writew(((u32 *) (p->pseudo_palette))[rect->color], HD64461_GRSCR); hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width, rect->height); hitfb_accel_start(1); } else { - fb_writew(rect->color, HD64461_GRSCR); + hitfb_writew(rect->color, HD64461_GRSCR); hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width, rect->height); hitfb_accel_start(0); @@ -162,7 +178,7 @@ static int hitfb_pan_display(struct fb_var_screeninfo *var, if (xoffset != 0) return -EINVAL; - fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR); + hitfb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR); return 0; } @@ -172,33 +188,33 @@ int hitfb_blank(int blank_mode, struct fb_info *info) unsigned short v; if (blank_mode) { - v = fb_readw(HD64461_LDR1); + v = hitfb_readw(HD64461_LDR1); v &= ~HD64461_LDR1_DON; - fb_writew(v, HD64461_LDR1); + hitfb_writew(v, HD64461_LDR1); - v = fb_readw(HD64461_LCDCCR); + v = hitfb_readw(HD64461_LCDCCR); v |= HD64461_LCDCCR_MOFF; - fb_writew(v, HD64461_LCDCCR); + hitfb_writew(v, HD64461_LCDCCR); - v = fb_readw(HD64461_STBCR); + v = hitfb_readw(HD64461_STBCR); v |= HD64461_STBCR_SLCDST; - fb_writew(v, HD64461_STBCR); + hitfb_writew(v, HD64461_STBCR); } else { - v = fb_readw(HD64461_STBCR); + v = hitfb_readw(HD64461_STBCR); v &= ~HD64461_STBCR_SLCDST; - fb_writew(v, HD64461_STBCR); + hitfb_writew(v, HD64461_STBCR); - v = fb_readw(HD64461_LCDCCR); + v = hitfb_readw(HD64461_LCDCCR); v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ); - fb_writew(v, HD64461_LCDCCR); + hitfb_writew(v, HD64461_LCDCCR); do { - v = fb_readw(HD64461_LCDCCR); + v = hitfb_readw(HD64461_LCDCCR); } while(v&HD64461_LCDCCR_STBACK); - v = fb_readw(HD64461_LDR1); + v = hitfb_readw(HD64461_LDR1); v |= HD64461_LDR1_DON; - fb_writew(v, HD64461_LDR1); + hitfb_writew(v, HD64461_LDR1); } return 0; } @@ -211,10 +227,10 @@ static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green, switch (info->var.bits_per_pixel) { case 8: - fb_writew(regno << 8, HD64461_CPTWAR); - fb_writew(red >> 10, HD64461_CPTWDR); - fb_writew(green >> 10, HD64461_CPTWDR); - fb_writew(blue >> 10, HD64461_CPTWDR); + hitfb_writew(regno << 8, HD64461_CPTWAR); + hitfb_writew(red >> 10, HD64461_CPTWDR); + hitfb_writew(green >> 10, HD64461_CPTWDR); + hitfb_writew(blue >> 10, HD64461_CPTWDR); break; case 16: if (regno >= 16) @@ -302,11 +318,11 @@ static int hitfb_set_par(struct fb_info *info) break; } - fb_writew(info->fix.line_length, HD64461_LCDCLOR); - ldr3 = fb_readw(HD64461_LDR3); + hitfb_writew(info->fix.line_length, HD64461_LCDCLOR); + ldr3 = hitfb_readw(HD64461_LDR3); ldr3 &= ~15; ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8; - fb_writew(ldr3, HD64461_LDR3); + hitfb_writew(ldr3, HD64461_LDR3); return 0; } @@ -337,9 +353,9 @@ static int hitfb_probe(struct platform_device *dev) hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000); hitfb_fix.smem_len = 512 * 1024; - lcdclor = fb_readw(HD64461_LCDCLOR); - ldvndr = fb_readw(HD64461_LDVNDR); - ldr3 = fb_readw(HD64461_LDR3); + lcdclor = hitfb_readw(HD64461_LCDCLOR); + ldvndr = hitfb_readw(HD64461_LDVNDR); + ldr3 = hitfb_readw(HD64461_LDR3); switch (ldr3 & 15) { default: @@ -429,9 +445,9 @@ static int hitfb_suspend(struct device *dev) u16 v; hitfb_blank(1,0); - v = fb_readw(HD64461_STBCR); + v = hitfb_readw(HD64461_STBCR); v |= HD64461_STBCR_SLCKE_IST; - fb_writew(v, HD64461_STBCR); + hitfb_writew(v, HD64461_STBCR); return 0; } @@ -440,12 +456,12 @@ static int hitfb_resume(struct device *dev) { u16 v; - v = fb_readw(HD64461_STBCR); + v = hitfb_readw(HD64461_STBCR); v &= ~HD64461_STBCR_SLCKE_OST; msleep(100); - v = fb_readw(HD64461_STBCR); + v = hitfb_readw(HD64461_STBCR); v &= ~HD64461_STBCR_SLCKE_IST; - fb_writew(v, HD64461_STBCR); + hitfb_writew(v, HD64461_STBCR); hitfb_blank(0,0); return 0;
Cast I/O offsets to pointers to use them with I/O functions. The I/O functions expect pointers of type 'volatile void __iomem *', but the offsets are plain integers. Build warnings are ../drivers/video/fbdev/hitfb.c: In function 'hitfb_accel_wait': ../arch/x86/include/asm/hd64461.h:18:33: warning: passing argument 1 of 'fb_readw' makes pointer from integer without a cast [-Wint-conversion] 18 | #define HD64461_IO_OFFSET(x) (HD64461_IOBASE + (x)) | ^~~~~~~~~~~~~~~~~~~~~~ | | | unsigned int ../arch/x86/include/asm/hd64461.h:93:33: note: in expansion of macro 'HD64461_IO_OFFSET' 93 | #define HD64461_GRCFGR HD64461_IO_OFFSET(0x1044) /* Accelerator Configuration Register */ | ^~~~~~~~~~~~~~~~~ ../drivers/video/fbdev/hitfb.c:47:25: note: in expansion of macro 'HD64461_GRCFGR' 47 | while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ; | ^~~~~~~~~~~~~~ In file included from ../arch/x86/include/asm/fb.h:15, from ../include/linux/fb.h:19, from ../drivers/video/fbdev/hitfb.c:22: ../include/asm-generic/fb.h:52:57: note: expected 'const volatile void *' but argument is of type 'unsigned int' 52 | static inline u16 fb_readw(const volatile void __iomem *addr) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~ This patch only fixes the build warnings. It's not clear if the I/O offsets can legally be passed to the I/O helpers. It was apparently broken in 2007 when custom inw()/outw() helpers got removed by commit 34a780a0afeb ("sh: hp6xx pata_platform support."). Fixing the driver would require setting the I/O base address. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202305102136.eMjTSPwH-lkp@intel.com/ Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Cc: Artur Rojek <contact@artur-rojek.eu> --- drivers/video/fbdev/hitfb.c | 122 ++++++++++++++++++++---------------- 1 file changed, 69 insertions(+), 53 deletions(-)