The driver currently hard-codes HS/VS polarity to active-low and DE to
active-high, which is not correct for a lot of supported DPI panels.
Add the missing mode flag handling for HS/VS/DE polarity.
Acked-by: Maxime Ripard <maxime@xxxxxxxxxx>
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
Cc: Maxime Ripard <maxime@xxxxxxxxxx>
Cc: Robert Foss <robert.foss@xxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
To: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
V2: Rebase on next-20220214
V3: No change
V4: Add AB from Maxime
V5: No change
---
drivers/gpu/drm/bridge/chipone-icn6211.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c
index c871a90c0b8f4..30db8d1783cef 100644
--- a/drivers/gpu/drm/bridge/chipone-icn6211.c
+++ b/drivers/gpu/drm/bridge/chipone-icn6211.c
@@ -165,8 +165,16 @@ static void chipone_atomic_enable(struct drm_bridge *bridge,
struct drm_bridge_state *old_bridge_state)
{
struct chipone *icn = bridge_to_chipone(bridge);
+ struct drm_atomic_state *state = old_bridge_state->base.state;
struct drm_display_mode *mode = &icn->mode;
+ const struct drm_bridge_state *bridge_state;
u16 hfp, hbp, hsync;
+ u32 bus_flags;
+ u8 pol;
+
+ /* Get the DPI flags from the bridge state. */
+ bridge_state = drm_atomic_get_new_bridge_state(state, bridge);
+ bus_flags = bridge_state->output_bus_cfg.flags;
ICN6211_DSI(icn, MIPI_CFG_PW, MIPI_CFG_PW_CONFIG_DSI);
@@ -206,7 +214,13 @@ static void chipone_atomic_enable(struct drm_bridge *bridge,
ICN6211_DSI(icn, HFP_MIN, hfp & 0xff);
ICN6211_DSI(icn, MIPI_PD_CK_LANE, 0xa0);
ICN6211_DSI(icn, PLL_CTRL(12), 0xff);
- ICN6211_DSI(icn, BIST_POL, BIST_POL_DE_POL);
+
+ /* DPI HS/VS/DE polarity */
+ pol = ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? BIST_POL_HSYNC_POL : 0) |
+ ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? BIST_POL_VSYNC_POL : 0) |
+ ((bus_flags & DRM_BUS_FLAG_DE_HIGH) ? BIST_POL_DE_POL : 0);
+ ICN6211_DSI(icn, BIST_POL, pol);
+
ICN6211_DSI(icn, PLL_CTRL(6), PLL_CTRL_6_MIPI_CLK);
ICN6211_DSI(icn, PLL_REF_DIV, 0x71);
ICN6211_DSI(icn, PLL_INT(0), 0x2b);
--
2.35.1
