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| author |   Rodrigo Alencar <455.rodrigo.alencar@gmail.com> | 2020-07-24 17:22:18 -0300 |
|---|---|---|
| committer |   Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2020-09-08 13:33:03 +0200 |
| commit | 9ec2832e9cdd7b3ad58e39217775e5b10290e62f (patch) | |
| tree | eabb5954513e2fb1aad8283b603b717d68261f9c | |
| parent | video: fbdev: vga16fb: fix setting of pixclock because a pass-by-value error (diff) | |
| download | linux-dev-9ec2832e9cdd7b3ad58e39217775e5b10290e62f.tar.xz linux-dev-9ec2832e9cdd7b3ad58e39217775e5b10290e62f.zip | |
video: fbdev: ssd1307fb: Added support to Column offset
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
| -rw-r--r-- | Documentation/devicetree/bindings/display/ssd1307fb.txt | 1 | ||||
| -rw-r--r-- | 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..2dcb6d12d137 100644 --- a/Documentation/devicetree/bindings/display/ssd1307fb.txt +++ b/Documentation/devicetree/bindings/display/ssd1307fb.txt @@ -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 diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c index 09425ec317ba..eda448b7a0c9 100644 --- a/drivers/video/fbdev/ssd1307fb.c +++ b/drivers/video/fbdev/ssd1307fb.c @@ -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; |