Pixel inversion in hardware is performed by issuing the command 0xa7. This patch adds a boolean property to control color inversion.
Signed-off-by: Rodrigo Alencar <[email protected]> --- .../devicetree/bindings/display/ssd1307fb.txt | 1 + drivers/video/fbdev/ssd1307fb.c | 11 ++++++++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/display/ssd1307fb.txt b/Documentation/devicetree/bindings/display/ssd1307fb.txt index 74a7b228bcef..3076b71ede68 100644 --- a/Documentation/devicetree/bindings/display/ssd1307fb.txt +++ b/Documentation/devicetree/bindings/display/ssd1307fb.txt @@ -22,6 +22,7 @@ Optional properties: - solomon,com-seq: Display uses sequential COM pin configuration - solomon,com-lrremap: Display uses left-right COM pin remap - solomon,com-invdir: Display uses inverted COM pin scan direction + - solomon,color-inv: Set Inverse display mode (invert pixel color) - solomon,com-offset: Number of the COM pin wired to the first display line - solomon,col-offset: Offset of columns (SEG) that the screen is mapped to. - solomon,prechargep1: Length of deselect period (phase 1) in clock cycles. diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c index ac88bbe174b6..748c21c0567b 100644 --- a/drivers/video/fbdev/ssd1307fb.c +++ b/drivers/video/fbdev/ssd1307fb.c @@ -31,8 +31,9 @@ #define SSD1307FB_SET_LOOKUP_TABLE 0x91 #define SSD1307FB_CHARGE_PUMP 0x8d #define SSD1307FB_SEG_REMAP_ON 0xa1 -#define SSD1307FB_DISPLAY_OFF 0xae +#define SSD1307FB_DISPLAY_NORMAL 0xa6 #define SSD1307FB_SET_MULTIPLEX_RATIO 0xa8 +#define SSD1307FB_DISPLAY_OFF 0xae #define SSD1307FB_DISPLAY_ON 0xaf #define SSD1307FB_START_PAGE_ADDRESS 0xb0 #define SSD1307FB_SET_DISPLAY_OFFSET 0xd3 @@ -62,6 +63,7 @@ struct ssd1307fb_deviceinfo { struct ssd1307fb_par { unsigned area_color_enable : 1; unsigned com_invdir : 1; + unsigned color_inv : 1; unsigned com_lrremap : 1; unsigned com_seq : 1; unsigned lookup_table_set : 1; @@ -492,6 +494,12 @@ static int ssd1307fb_init(struct ssd1307fb_par *par) if (ret < 0) return ret; + /* Set normal or inverse */ + ret = ssd1307fb_write_cmd(par->client, + SSD1307FB_DISPLAY_NORMAL | (par->color_inv & 0x1)); + if (ret < 0) + return ret; + /* Clear the screen */ ssd1307fb_update_display(par); @@ -666,6 +674,7 @@ static int ssd1307fb_probe(struct i2c_client *client, par->com_seq = of_property_read_bool(node, "solomon,com-seq"); par->com_lrremap = of_property_read_bool(node, "solomon,com-lrremap"); par->com_invdir = of_property_read_bool(node, "solomon,com-invdir"); + par->color_inv = of_property_read_bool(node, "solomon,color-inv"); par->area_color_enable = of_property_read_bool(node, "solomon,area-color-enable"); par->low_power = of_property_read_bool(node, "solomon,low-power"); -- 2.23.0.rc1
