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drm/sun4i: fix HSYNC and VSYNC polarity

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Differently from other Lcd signals, HSYNC and VSYNC signals
result inverted if their bits are cleared to 0.

Invert their settings of IO_POL register.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1518717288-123578-1-git-send-email-giulio.benetti@micronovasrl.com
This commit is contained in:
Giulio Benetti 2018-02-15 18:54:48 +01:00 • committed by Maxime Ripard
parent cd0e93d865
commit fa4127c5eb
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GPG key ID: D2B4C094214DAF74
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/sun4i/sun4i_tcon.c
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@ -394,10 +394,10 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
SUN4I_TCON0_BASIC3_H_SYNC(hsync));
/* Setup the polarity of the various signals */
if (!(mode->flags & DRM_MODE_FLAG_PHSYNC))
if (mode->flags & DRM_MODE_FLAG_PHSYNC)
val |= SUN4I_TCON0_IO_POL_HSYNC_POSITIVE;
if (!(mode->flags & DRM_MODE_FLAG_PVSYNC))
if (mode->flags & DRM_MODE_FLAG_PVSYNC)
val |= SUN4I_TCON0_IO_POL_VSYNC_POSITIVE;
regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,