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| author | Maxime Ripard <maxime.ripard@bootlin.com> | 2018-02-21 15:57:02 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2018-03-06 18:27:31 +0300 |
| commit | 5af894bd20fa16970378cae8ff55917294e0d9dd (patch) | |
| tree | ba9ca9d2f7d5446c2fe1283cb9c07829cbc8fce0 /drivers | |
| parent | e742a17cd360fbd64425a3c861c59062ec837f23 (diff) | |
| download | linux-5af894bd20fa16970378cae8ff55917294e0d9dd.tar.xz | |
drm/sun4i: rgb: Fix potential division by zero
In the case where mode_valid callback of our RGB connector was called
before mode_set was being called, the range of dividers would not be set,
resulting in a division by zero later on in the clk_round_rate logic.
Set the range of dividers before calling clk_round_rate to fix this.
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180221125703.4595-2-maxime.ripard@bootlin.com
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_rgb.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c index 832f8f9bc47f..b8da5a50a61d 100644 --- a/drivers/gpu/drm/sun4i/sun4i_rgb.c +++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c @@ -92,6 +92,8 @@ static int sun4i_rgb_mode_valid(struct drm_connector *connector, DRM_DEBUG_DRIVER("Vertical parameters OK\n"); + tcon->dclk_min_div = 6; + tcon->dclk_max_div = 127; rounded_rate = clk_round_rate(tcon->dclk, rate); if (rounded_rate < rate) return MODE_CLOCK_LOW; |