drm/panel: otm8009a: Set clock to 29.70 Mhz

The panel does not support clock frequency over 30.74 MHz. The clock
rate has been reduced to 29.70 MHz & new timings have been computed to
get a framerate of 50 fps.

Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1553155646-13636-1-git-send-email-yannick.fertre@st.com

diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
index f67594a..f27a7e4 100644 (file)
--- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
+++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
@@ -67,15 +67,15 @@ struct otm8009a {
 };
 
 static const struct drm_display_mode default_mode = {
-       .clock = 32729,
+       .clock = 29700,
        .hdisplay = 480,
-       .hsync_start = 480 + 120,
-       .hsync_end = 480 + 120 + 63,
-       .htotal = 480 + 120 + 63 + 120,
+       .hsync_start = 480 + 98,
+       .hsync_end = 480 + 98 + 32,
+       .htotal = 480 + 98 + 32 + 98,
        .vdisplay = 800,
-       .vsync_start = 800 + 12,
-       .vsync_end = 800 + 12 + 12,
-       .vtotal = 800 + 12 + 12 + 12,
+       .vsync_start = 800 + 15,
+       .vsync_end = 800 + 15 + 10,
+       .vtotal = 800 + 15 + 10 + 14,
        .vrefresh = 50,
        .flags = 0,
        .width_mm = 52,