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video: fbdev: ssd1307fb: Added support to Column offset

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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 <455.rodrigo.alencar@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1595622138-3965-1-git-send-email-455.rodrigo.alencar@gmail.com
This commit is contained in:
Rodrigo Alencar 2020-07-24 17:22:18 -03:00 committed by Bartlomiej Zolnierkiewicz
parent c72fab81ce
commit 9ec2832e9c
2 changed files with 7 additions and 2 deletions
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1
Documentation/devicetree/bindings/display/ssd1307fb.txt
View File

@ -19,6 +19,7 @@ Optional properties:
- vbat-supply: The supply for VBAT
- solomon,segment-no-remap: Display needs normal (non-inverted) data column
to segment mapping
- solomon,col-offset: Offset of columns (COL/SEG) that the screen is mapped to.
- 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

8
drivers/video/fbdev/ssd1307fb.c
View File

@ -74,6 +74,7 @@ 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;
@ -458,11 +459,11 @@ 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;
@ -626,6 +627,9 @@ static int ssd1307fb_probe(struct i2c_client *client)
if (device_property_read_u32(dev, "solomon,page-offset", &par->page_offset))
par->page_offset = 1;
if (device_property_read_u32(dev, "solomon,col-offset", &par->col_offset))
par->col_offset = 0;
if (device_property_read_u32(dev, "solomon,com-offset", &par->com_offset))
par->com_offset = 0;