This patch provides support for displays like VGM128064B0W10, which requires a column offset of 2, i.e., its segments starts in SEG2 and ends in SEG129.
Signed-off-by: Rodrigo Alencar <[email protected]> --- Documentation/devicetree/bindings/display/ssd1307fb.txt | 1 + drivers/video/fbdev/ssd1307fb.c | 8 ++++++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/display/ssd1307fb.txt b/Documentation/devicetree/bindings/display/ssd1307fb.txt index 27333b9551b3..74a7b228bcef 100644 --- a/Documentation/devicetree/bindings/display/ssd1307fb.txt +++ b/Documentation/devicetree/bindings/display/ssd1307fb.txt @@ -23,6 +23,7 @@ Optional properties: - solomon,com-lrremap: Display uses left-right COM pin remap - solomon,com-invdir: Display uses inverted COM pin scan direction - 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. - solomon,prechargep2: Length of precharge period (phase 2) in clock cycles. This needs to be the higher, the higher the capacitance diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c index 12fa1050f3eb..ac88bbe174b6 100644 --- a/drivers/video/fbdev/ssd1307fb.c +++ b/drivers/video/fbdev/ssd1307fb.c @@ -77,6 +77,7 @@ struct ssd1307fb_par { struct fb_info *info; u8 lookup_table[4]; u32 page_offset; + u32 col_offset; u32 prechargep1; u32 prechargep2; struct pwm_device *pwm; @@ -468,11 +469,11 @@ static int ssd1307fb_init(struct ssd1307fb_par *par) if (ret < 0) return ret; - ret = ssd1307fb_write_cmd(par->client, 0x0); + ret = ssd1307fb_write_cmd(par->client, par->col_offset); if (ret < 0) return ret; - ret = ssd1307fb_write_cmd(par->client, par->width - 1); + ret = ssd1307fb_write_cmd(par->client, par->col_offset + par->width - 1); if (ret < 0) return ret; @@ -644,6 +645,9 @@ static int ssd1307fb_probe(struct i2c_client *client, if (of_property_read_u32(node, "solomon,page-offset", &par->page_offset)) par->page_offset = 1; + if (of_property_read_u32(node, "solomon,col-offset", &par->col_offset)) + par->col_offset = 0; + if (of_property_read_u32(node, "solomon,com-offset", &par->com_offset)) par->com_offset = 0; -- 2.23.0.rc1
