Messages in this thread | | | Subject | Re: [PATCH] omapfb: dss: Fix max fclk divider for omap36xx | From | Tomi Valkeinen <> | Date | Fri, 3 Jul 2020 10:17:29 +0300 |
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On 30/06/2020 21:26, Adam Ford wrote: > The drm/omap driver was fixed to correct an issue where using a > divider of 32 breaks the DSS despite the TRM stating 32 is a valid > number. Through experimentation, it appears that 31 works, and > it is consistent with the value used by the drm/omap driver. > > This patch fixes the divider for fbdev driver instead of the drm. > > Fixes: f76ee892a99e ("omapfb: copy omapdss & displays for omapfb") > > Cc: <stable@vger.kernel.org> #4.9+ > Signed-off-by: Adam Ford <aford173@gmail.com> > --- > Linux 4.4 will need a similar patch, but it doesn't apply cleanly. > > The DRM version of this same fix is: > e2c4ed148cf3 ("drm/omap: fix max fclk divider for omap36xx") > > > diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss.c b/drivers/video/fbdev/omap2/omapfb/dss/dss.c > index 7252d22dd117..bfc5c4c5a26a 100644 > --- a/drivers/video/fbdev/omap2/omapfb/dss/dss.c > +++ b/drivers/video/fbdev/omap2/omapfb/dss/dss.c > @@ -833,7 +833,7 @@ static const struct dss_features omap34xx_dss_feats = { > }; > > static const struct dss_features omap3630_dss_feats = { > - .fck_div_max = 32, > + .fck_div_max = 31, > .dss_fck_multiplier = 1, > .parent_clk_name = "dpll4_ck", > .dpi_select_source = &dss_dpi_select_source_omap2_omap3, >
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Tomi
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