From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adam Ford Date: Tue, 30 Jun 2020 18:26:36 +0000 Subject: [PATCH] omapfb: dss: Fix max fclk divider for omap36xx Message-Id: <20200630182636.439015-1-aford173@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-fbdev@vger.kernel.org Cc: Bartlomiej Zolnierkiewicz , Adam Ford , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Tomi Valkeinen , dri-devel@lists.freedesktop.org, linux-omap@vger.kernel.org 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: #4.9+ Signed-off-by: Adam Ford --- 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, -- 2.25.1