mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
drm/sun4i: DW HDMI: Lower max. supported rate for H6
Currently resolutions with pixel clock higher than 340 MHz don't work
with H6 HDMI controller. They just produce a blank screen.
Limit maximum pixel clock rate to 340 MHz until scrambling is supported.
Cc: stable@vger.kernel.org # 5.0
Fixes: 40bb9d3147
("drm/sun4i: Add support for H6 DW HDMI controller")
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190324190609.32721-1-jernej.skrabec@siol.net
This commit is contained in:
parent
3df1af984b
commit
cd9063757a
1 changed files with 7 additions and 2 deletions
|
@ -48,8 +48,13 @@ static enum drm_mode_status
|
|||
sun8i_dw_hdmi_mode_valid_h6(struct drm_connector *connector,
|
||||
const struct drm_display_mode *mode)
|
||||
{
|
||||
/* This is max for HDMI 2.0b (4K@60Hz) */
|
||||
if (mode->clock > 594000)
|
||||
/*
|
||||
* Controller support maximum of 594 MHz, which correlates to
|
||||
* 4K@60Hz 4:4:4 or RGB. However, for frequencies greater than
|
||||
* 340 MHz scrambling has to be enabled. Because scrambling is
|
||||
* not yet implemented, just limit to 340 MHz for now.
|
||||
*/
|
||||
if (mode->clock > 340000)
|
||||
return MODE_CLOCK_HIGH;
|
||||
|
||||
return MODE_OK;
|
||||
|
|
Loading…
Reference in a new issue