On Tue, Jul 24, 2012 at 12:47:02, Manjunathappa, Prakash wrote:
> Hi Sriram,
>
> On Tue, Jul 24, 2012 at 10:11:55, Madhvapathi Sriram wrote:
> > On Tue, Jul 24, 2012 at 9:39 AM, Manjunathappa, Prakash
> > <prakash.pm@xxxxxx> wrote:
> [...]
> > > /* Disable the Raster Engine of the LCD Controller */
> > > -static inline void lcd_disable_raster(void)
> > > +static inline void lcd_disable_raster(bool wait_for_frame_done)
> > > {
> > > u32 reg;
> > > + u32 loop_cnt = 0;
> > > + u32 stat;
> > > + u32 i = 0;
> > > +
> > > + /* 50 milli seconds should be sufficient for a frame to complete
> > > */
> > > + if (wait_for_frame_done)
> > > + loop_cnt = 50;
> > >
> > > reg = lcdc_read(LCD_RASTER_CTRL_REG);
> > > if (reg & LCD_RASTER_ENABLE)
> > > lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
> > > +
> > > + /* Wait for the current frame to complete */
> > > + do {
> > > + if (lcd_revision == LCD_VERSION_1)
> > > + stat = lcdc_read(LCD_STAT_REG);
> > > + else
> > > + stat = lcdc_read(LCD_RAW_STAT_REG);
> > > + mdelay(1);
> > > + } while (!(stat & LCD_FRAME_DONE) && (i++ < loop_cnt));
> >
> > Are you sure it should be do while? You call it from interrupt handler
> > too (sync lost handling). In that case mdelay() from interrupt
> > context..not a good idea I feel.
> >
>
> Ok. I will change it as below:
>
> while (1) {
> if (lcd_revision == LCD_VERSION_1)
> stat = lcdc_read(LCD_STAT_REG);
> else
> stat = lcdc_read(LCD_RAW_STAT_REG);
> if((stat & LCD_FRAME_DONE) || (i++ > loop_cnt))
s/i++/++i
Thanks,
Prakash
> break;
> mdelay(1);
> }
>
> > > +
> > > + if (lcd_revision == LCD_VERSION_1)
> > > + lcdc_write(stat, LCD_STAT_REG);
> > > + else
> > > + lcdc_write(stat, LCD_MASKED_STAT_REG);
> > > +
> > > + if ((loop_cnt != 0) && (i >= loop_cnt)) {
> > > + pr_err("LCD Controller timed out\n");
> > > + return;
> >
> > return may not be necessary?
> >
>
> Agree, I will remove it.
>
> Thanks,
> Prakash
>
> > > + }
> > > }
>
> [...]
>
>
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