From: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxx>
During commit 88bc4178568b ("drm: Use new
DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags") DRM_BUS_FLAG_*
macros have been changed to avoid ambiguity but just because of this
ambiguity previous DRM_BUS_FLAG_PIXDATA_(POS/NEG)EDGE were used meaning
_SAMPLE_ not _DRIVE_. This lead to DLCK inversion, so let's swap DCLK
phase to fix it.
Fixes: 88bc4178568b ("drm: Use new DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags")
Signed-off-by: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxx>
---
V1->V2:
use Fixes: tag in commit log as suggested by Jernej
---
drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index eaaf5d70e352..52598bb0fb0b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -585,10 +585,10 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
* and DOTCLOCK drivers.
*/
if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
- clk_set_phase(tcon->dclk, 240);
+ clk_set_phase(tcon->dclk, 0);
if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
- clk_set_phase(tcon->dclk, 0);
+ clk_set_phase(tcon->dclk, 240);
regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
SUN4I_TCON0_IO_POL_HSYNC_POSITIVE |
--
2.25.1
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