shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 02:50:49 +09:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
[ Upstream commit 320e84dc61 ]

Commit 63495f6b4a ("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: Thomas Zimmermann <tzimmermann@suse.de>
Reported-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Fixes: 63495f6b4a ("drm/vc4: hdmi: Make sure our clock rate is within limits")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215154243.540115-4-maxime@cerno.tech
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Maxime Ripard
2020-12-15 16:42:37 +01:00
committed by Greg Kroah-Hartman
parent 5eb0784f4d
commit 5d93dad67d
1 changed files with 3 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/vc4/vc4_hdmi.c
View File

@@ -791,6 +791,9 @@ 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;