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staging: fbtft: access screen buffer directly 

In fbtft-bus.c:fbtft_write_vmem16_bus9(), ioread8() is used for
accessing the provided screen array. Since screen_buffer actually
points to an ordinary buffer, instead access it directly.

Signed-off-by: Lars Svensson <lars1.svensson@sonymobile.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lars Svensson 2015-10-07 09:20:14 +02:00 committed by Greg Kroah-Hartman
parent 4b6dc179dc
commit 6b626c77be
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/fbtft/fbtft-bus.c
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@ -179,7 +179,7 @@ EXPORT_SYMBOL(fbtft_write_vmem16_bus8);
/* 16 bit pixel over 9-bit SPI bus: dc + high byte, dc + low byte */
int fbtft_write_vmem16_bus9(struct fbtft_par *par, size_t offset, size_t len)
{
u8 __iomem *vmem8;
u8 *vmem8;
u16 *txbuf16 = par->txbuf.buf;
size_t remain;
size_t to_copy;
@ -207,12 +207,12 @@ int fbtft_write_vmem16_bus9(struct fbtft_par *par, size_t offset, size_t len)
#ifdef __LITTLE_ENDIAN
for (i = 0; i < to_copy; i += 2) {
txbuf16[i] = 0x0100 | ioread8(vmem8 + i + 1);
txbuf16[i + 1] = 0x0100 | ioread8(vmem8 + i);
txbuf16[i] = 0x0100 | vmem8[i + 1];
txbuf16[i + 1] = 0x0100 | vmem8[i];
}
#else
for (i = 0; i < to_copy; i++)
txbuf16[i] = 0x0100 | ioread8(vmem8 + i);
txbuf16[i] = 0x0100 | vmem8[i];
#endif
vmem8 = vmem8 + to_copy;
ret = par->fbtftops.write(par, par->txbuf.buf, to_copy * 2);