Re: [Qemu-devel] [PATCH v3 1/2] pxa2xx_lcd: add proper rotation support

[Vasily Khoruzhick <anarsoul@gmail.com>]

On Wednesday 08 June 2011 12:50:50 Peter Maydell wrote:
> On 3 June 2011 16:36, Vasily Khoruzhick <anarsoul@gmail.com> wrote:
> > Until now, pxa2xx_lcd only supported 90deg rotation, but
> > some machines (for example Zipit Z2) needs 270deg rotation.
> > 
> > Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
> 
> Still haven't tested this yet, but some very quick first
> pass comments.
> 
> > +static void pxa2xx_lcdc_dma0_redraw_rot180(PXA2xxLCDState *s,
> > +                target_phys_addr_t addr, int *miny, int *maxy)
> > +{
> > +    int src_width, dest_width;
> > +    drawfn fn = NULL;
> > +    if (s->dest_width)
> > +        fn = s->line_fn[s->transp][s->bpp];
> > +    if (!fn)
> > +        return;
> 
> Braces (here and elsewhere); if we're adding whole new functions
> we might as well do them in accordance with the styl.

Oh, ok. I'll add patch to fix pxa2xx_lcd.c codestyle to the series, and then 
fix this patch.

> 
> >             case QEMU_OPTION_portrait:
> > -                graphic_rotate = 1;
> > +                graphic_rotate = 90;
> > +                break;
> > +            case QEMU_OPTION_rotate:
> > +                graphic_rotate = atoi(optarg);
> > +                if (graphic_rotate != 0 && graphic_rotate != 90 &&
> > +                    graphic_rotate != 180 && graphic_rotate != 270) {
> > +                    fprintf(stderr,
> > +                        "qemu: only 90, 180, 270 deg rotation is
> > available\n"); +                    exit(1);
> > +                }
> 
> We seem to generally use strtol() for argument parsing rather
> than atoi, might be nicer to be consistent.

Ok

> The other bit of code that looks at graphic_rotate
> is hw/spitz.c:spitz_keyboard_register(). Does that require
> changes? It doesn't seem entirely right for us to assert
> 'tablet mode' for everything except 0deg rotation.

Well, -portrait argument is preserved, so all old code should work fine 
(including scripts to start qemu). Passing -rotate 180 or -rotate 270 will 
produce unpredictable result (but not a crash). I have no spitz  image, so I 
can't test what happens.

Regards
Vasily