On 28/06/10 12:28, Maurus Cuelenaere wrote:
> Op 28-06-10 10:08, Pawel Osciak schreef:
>> Supports all bpp modes.
>>
>> The PRTCON register is used to disable in-hardware updates of registers
>> that store start and end addresses of framebuffer memory. This prevents
>> display corruption in case we do not make it before VSYNC with updating
>> them atomically. With this feature there is no need to wait for a VSYNC
>> interrupt before each such update.
>>
>> Signed-off-by: Pawel Osciak <p.osciak@xxxxxxxxxxx>
>> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
>> ---
>> arch/arm/plat-samsung/include/plat/regs-fb.h | 5 ++
>> drivers/video/s3c-fb.c | 71 ++++++++++++++++++++++++++
>> 2 files changed, 76 insertions(+), 0 deletions(-)
>>
>> diff --git a/arch/arm/plat-samsung/include/plat/regs-fb.h b/arch/arm/plat-samsung/include/plat/regs-fb.h
>> index ac10013..f454e32 100644
>> --- a/arch/arm/plat-samsung/include/plat/regs-fb.h
>> +++ b/arch/arm/plat-samsung/include/plat/regs-fb.h
>> @@ -112,6 +112,11 @@
>> #define VIDCON2_ORGYCbCr (1 << 8)
>> #define VIDCON2_YUVORDCrCb (1 << 7)
>>
>> +/* PRTCON (S3C6410, S5PC100) */
>> +
>> +#define PRTCON (0x0c)
>> +#define PRTCON_PROTECT (1 << 11)
>> +
>> /* VIDTCON0 */
>>
>> #define VIDTCON0_VBPDE_MASK (0xff << 24)
>> diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c
>> index 59ac76a..4f3680d 100644
>> --- a/drivers/video/s3c-fb.c
>> +++ b/drivers/video/s3c-fb.c
>> @@ -71,6 +71,7 @@ struct s3c_fb;
>> * @buf_end: Offset of buffer end registers.
>> * @osd: The base for the OSD registers.
>> * @palette: Address of palette memory, or 0 if none.
>> + * @has_prtcon: Set if has PRTCON register.
>> */
>> struct s3c_fb_variant {
>> unsigned int is_2443:1;
>> @@ -85,6 +86,8 @@ struct s3c_fb_variant {
>> unsigned short osd;
>> unsigned short osd_stride;
>> unsigned short palette[S3C_FB_MAX_WIN];
>> +
>> + unsigned int has_prtcon:1;
>> };
>>
>> /**
>> @@ -379,6 +382,9 @@ static int s3c_fb_set_par(struct fb_info *info)
>>
>> info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
>>
>> + info->fix.xpanstep = info->var.xres_virtual > info->var.xres ? 1 : 0;
>> + info->fix.ypanstep = info->var.yres_virtual > info->var.yres ? 1 : 0;
>
> No need for the '? 1 : 0'
I tihnk there is, IIRC there is no neccessity for a compiler to produce
one for true, just that the result be !0
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