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    Subject[PATCH 4.9 057/212] omapfb: dss: Fix max fclk divider for omap36xx
    Date
    From: Adam Ford <aford173@gmail.com>

    commit 254503a2b186caa668a188dbbd7ab0d25149c0a5 upstream.

    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> #4.5+
    Signed-off-by: Adam Ford <aford173@gmail.com>
    Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
    Cc: Dave Airlie <airlied@gmail.com>
    Cc: Rob Clark <robdclark@gmail.com>
    [b.zolnierkie: mark patch as applicable to stable 4.5+ (was 4.9+)]
    Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
    Link: https://patchwork.freedesktop.org/patch/msgid/20200630182636.439015-1-aford173@gmail.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/video/fbdev/omap2/omapfb/dss/dss.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/video/fbdev/omap2/omapfb/dss/dss.c
    +++ b/drivers/video/fbdev/omap2/omapfb/dss/dss.c
    @@ -843,7 +843,7 @@ static const struct dss_features omap34x
    };

    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,

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