lkml.org 
[lkml]   [2019]   [Dec]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4/5] Revert "drm/atmel-hlcdc: allow selecting a higher pixel-clock than requested"
    Date
    This reverts commit f6f7ad3234613f6f7f27c25036aaf078de07e9b0.
    ("drm/atmel-hlcdc: allow selecting a higher pixel-clock than requested")
    because allowing selecting a higher pixel clock may overclock
    LCD devices, not all of them being capable of this.

    Cc: Peter Rosin <peda@axentia.se>
    Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
    ---
    drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 12 ------------
    1 file changed, 12 deletions(-)

    diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
    index 721fa88bf71d..1a70dff1a417 100644
    --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
    +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
    @@ -117,18 +117,6 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
    div = DIV_ROUND_UP(prate, mode_rate);
    if (ATMEL_HLCDC_CLKDIV(div) & ~ATMEL_HLCDC_CLKDIV_MASK)
    div = ATMEL_HLCDC_CLKDIV_MASK;
    - } else {
    - int div_low = prate / mode_rate;
    -
    - if (div_low >= 2 &&
    - ((prate / div_low - mode_rate) <
    - 10 * (mode_rate - prate / div)))
    - /*
    - * At least 10 times better when using a higher
    - * frequency than requested, instead of a lower.
    - * So, go with that.
    - */
    - div = div_low;
    }

    cfg |= ATMEL_HLCDC_CLKDIV(div);
    --
    2.7.4
    \
     
     \ /
      Last update: 2019-12-10 14:25    [W:2.698 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site