The ICN6211 is capable of swapping the output DPI RGB/BGR color channels,
implement support for this and add DT property "blue-and-red-swap" to
select the RGB/BGR channel order.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Jagan Teki <jagan@xxxxxxxxxxxxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Robert Foss <robert.foss@xxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
---
drivers/gpu/drm/bridge/chipone-icn6211.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c
index 7ee1858bab321..7d64172373a35 100644
--- a/drivers/gpu/drm/bridge/chipone-icn6211.c
+++ b/drivers/gpu/drm/bridge/chipone-icn6211.c
@@ -30,6 +30,8 @@
#define PD_CTRL(n) (0x0a + ((n) & 0x3)) /* 0..3 */
#define RST_CTRL(n) (0x0e + ((n) & 0x1)) /* 0..1 */
#define SYS_CTRL(n) (0x10 + ((n) & 0x7)) /* 0..4 */
+#define SYS_CTRL_0_COLOR_ORDER_RGB 0x0
+#define SYS_CTRL_0_COLOR_ORDER_BGR 0x5
#define SYS_CTRL_1_CLK_PHASE_MSK GENMASK(5, 4)
#define CLK_PHASE_0 0
#define CLK_PHASE_1_4 1
@@ -155,6 +157,7 @@ struct chipone {
struct clk *refclk;
unsigned long refclk_rate;
bool interface_i2c;
+ bool color_swap;
};
static const struct regmap_range chipone_dsi_readable_ranges[] = {
@@ -426,7 +429,9 @@ static void chipone_atomic_enable(struct drm_bridge *bridge,
/* Configure PLL settings */
chipone_configure_pll(icn, mode);
- chipone_writeb(icn, SYS_CTRL(0), 0x40);
+ chipone_writeb(icn, SYS_CTRL(0), 0x40 |
+ (icn->color_swap ? SYS_CTRL_0_COLOR_ORDER_BGR :
+ SYS_CTRL_0_COLOR_ORDER_RGB));
sys_ctrl_1 = 0x88;
if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
@@ -680,6 +685,9 @@ static int chipone_parse_dt(struct chipone *icn)
return PTR_ERR(icn->enable_gpio);
}
+ icn->color_swap = of_property_read_bool(dev->of_node,
+ "blue-and-red-swap");
+
icn->panel_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
if (IS_ERR(icn->panel_bridge))
return PTR_ERR(icn->panel_bridge);
--
2.35.1
