Commit 9ec2832e authored by Rodrigo Alencar's avatar Rodrigo Alencar Committed by Bartlomiej Zolnierkiewicz
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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: default avatarRodrigo Alencar <455.rodrigo.alencar@gmail.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1595622138-3965-1-git-send-email-455.rodrigo.alencar@gmail.com
parent c72fab81

Documentation/devicetree/bindings/display/ssd1307fb.txt

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/video/fbdev/ssd1307fb.c

+6 −2
Original line number Diff line number Diff line
@@ -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;

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