From: Dmitry Baryshkov dmitry.baryshkov@linaro.org
[ Upstream commit 0b157efa384ea417304b1da284ee2f603c607fc3 ]
Fix programming of hsync and vsync polarities
Fixes: 23278bf54afe ("drm/bridge: Introduce LT9611 DSI to HDMI bridge") Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Signed-off-by: Neil Armstrong neil.armstrong@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20230118081658.2198520-4-dmitr... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/bridge/lontium-lt9611.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index 58f39b2792179..deb503ca956af 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611.c @@ -207,7 +207,6 @@ static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mod
/* stage 2 */ { 0x834a, 0x40 }, - { 0x831d, 0x10 },
/* MK limit */ { 0x832d, 0x38 }, @@ -222,11 +221,19 @@ static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mod { 0x8325, 0x00 }, { 0x832a, 0x01 }, { 0x834a, 0x10 }, - { 0x831d, 0x10 }, - { 0x8326, 0x37 }, }; + u8 pol = 0x10;
- regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); + if (mode->flags & DRM_MODE_FLAG_NHSYNC) + pol |= 0x2; + if (mode->flags & DRM_MODE_FLAG_NVSYNC) + pol |= 0x1; + regmap_write(lt9611->regmap, 0x831d, pol); + + if (mode->hdisplay == 3840) + regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2)); + else + regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
switch (mode->hdisplay) { case 640: @@ -236,7 +243,7 @@ static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mod regmap_write(lt9611->regmap, 0x8326, 0x37); break; case 3840: - regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2)); + regmap_write(lt9611->regmap, 0x8326, 0x37); break; }