4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Giulio Benetti giulio.benetti@micronovasrl.com
[ Upstream commit e64b6afa98f3629d0c0c46233bbdbe8acdb56f06 ]
Phase value is not shifted before writing.
Shift left of 28 bits to fit right bits
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/1519836413-35023-1-git-send-em... Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/sun4i/sun4i_dotclock.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/sun4i/sun4i_dotclock.c +++ b/drivers/gpu/drm/sun4i/sun4i_dotclock.c @@ -129,10 +129,13 @@ static int sun4i_dclk_get_phase(struct c static int sun4i_dclk_set_phase(struct clk_hw *hw, int degrees) { struct sun4i_dclk *dclk = hw_to_dclk(hw); + u32 val = degrees / 120; + + val <<= 28;
regmap_update_bits(dclk->regmap, SUN4I_TCON0_IO_POL_REG, GENMASK(29, 28), - degrees / 120); + val);
return 0; }