Commit 320e84dc authored by Maxime Ripard's avatar Maxime Ripard

drm/vc4: hdmi: Take into account the clock doubling flag in atomic_check

Commit 63495f6b ("drm/vc4: hdmi: Make sure our clock rate is within
limits") was intended to compute the pixel rate to make sure we remain
within the boundaries of what the hardware can provide.

However, unlike what mode_valid was checking for, we forgot to take
into account the clock doubling flag that can be set for modes. Let's
honor that flag if it's there.
Acked-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Reported-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: default avatarDave Stevenson <dave.stevenson@raspberrypi.com>
Fixes: 63495f6b ("drm/vc4: hdmi: Make sure our clock rate is within limits")
Signed-off-by: default avatarMaxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215154243.540115-4-maxime@cerno.tech
parent 8d914746
......@@ -799,6 +799,9 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
pixel_rate = mode->clock * 1000;
}
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
pixel_rate = pixel_rate * 2;
if (pixel_rate > vc4_hdmi->variant->max_pixel_clock)
return -EINVAL;
......
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