From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: "Noralf Trønnes" <noralf@tronnes.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
devel@driverdev.osuosl.org,
"Thomas Petazzoni" <thomas.petazzoni@free-electrons.com>,
linux-kernel@vger.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v2 5/6] staging: fbtft: fb_ssd1306: Support smaller screen sizes
Date: Mon, 2 Jan 2017 13:35:33 +0200 [thread overview]
Message-ID: <20170102113534.127692-6-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20170102113534.127692-1-andriy.shevchenko@linux.intel.com>
There is 64x48 display exists. In order to support that set multiplexer
to 48 pixels and window address to proper position in the graphic display
data RAM.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/staging/fbtft/fb_ssd1306.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/staging/fbtft/fb_ssd1306.c b/drivers/staging/fbtft/fb_ssd1306.c
index 80fc57029fee..bede2d5a5571 100644
--- a/drivers/staging/fbtft/fb_ssd1306.c
+++ b/drivers/staging/fbtft/fb_ssd1306.c
@@ -62,6 +62,8 @@ static int init_display(struct fbtft_par *par)
write_reg(par, 0xA8);
if (par->info->var.yres == 64)
write_reg(par, 0x3F);
+ else if (par->info->var.yres == 48)
+ write_reg(par, 0x2F);
else
write_reg(par, 0x1F);
@@ -95,6 +97,9 @@ static int init_display(struct fbtft_par *par)
if (par->info->var.yres == 64)
/* A[4]=1b, Alternative COM pin configuration */
write_reg(par, 0x12);
+ else if (par->info->var.yres == 48)
+ /* A[4]=1b, Alternative COM pin configuration */
+ write_reg(par, 0x12);
else
/* A[4]=0b, Sequential COM pin configuration */
write_reg(par, 0x02);
@@ -124,6 +129,19 @@ static int init_display(struct fbtft_par *par)
return 0;
}
+static void set_addr_win_64x48(struct fbtft_par *par)
+{
+ /* Set Column Address */
+ write_reg(par, 0x21);
+ write_reg(par, 0x20);
+ write_reg(par, 0x5F);
+
+ /* Set Page Address */
+ write_reg(par, 0x22);
+ write_reg(par, 0x0);
+ write_reg(par, 0x5);
+}
+
static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{
/* Set Lower Column Start Address for Page Addressing Mode */
@@ -132,6 +150,9 @@ static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
write_reg(par, 0x10 | 0x0);
/* Set Display Start Line */
write_reg(par, 0x40 | 0x0);
+
+ if (par->info->var.xres == 64 && par->info->var.yres == 48)
+ set_addr_win_64x48(par);
}
static int blank(struct fbtft_par *par, bool on)
--
2.11.0
next prev parent reply other threads:[~2017-01-02 11:35 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-02 11:35 [PATCH v2 0/6] fbtft: make it work with DMA enabled SPI Andy Shevchenko
2017-01-02 11:35 ` [PATCH v2 1/6] staging: fbtft: convert fbtft_reset() to be non-atomic Andy Shevchenko
2017-01-03 17:22 ` Noralf Trønnes
2017-01-02 11:35 ` [PATCH v2 2/6] staging: fbtft: do not override DMA coherent mask Andy Shevchenko
2017-01-02 18:14 ` Noralf Trønnes
2017-01-03 10:51 ` Andy Shevchenko
2017-01-03 13:58 ` Andy Shevchenko
2017-01-03 17:18 ` Noralf Trønnes
2017-01-02 11:35 ` [PATCH v2 3/6] staging: fbtft: fallback to usual allocation when DMA fails Andy Shevchenko
2017-01-03 16:12 ` Andy Shevchenko
2017-01-03 17:23 ` Noralf Trønnes
2017-01-02 11:35 ` [PATCH v2 4/6] staging: fbtft: propagate error code from kstrto*() Andy Shevchenko
2017-01-02 18:19 ` kbuild test robot
2017-01-02 11:35 ` Andy Shevchenko [this message]
2017-01-03 17:27 ` [PATCH v2 5/6] staging: fbtft: fb_ssd1306: Support smaller screen sizes Noralf Trønnes
2017-01-02 11:35 ` [PATCH v2 6/6] staging: fbtft: fb_ssd1306: Refactor write_vmem() Andy Shevchenko
2017-01-02 11:37 ` [PATCH v2 0/6] fbtft: make it work with DMA enabled SPI Andy Shevchenko
2017-01-03 15:27 ` Greg Kroah-Hartman
2017-01-03 15:49 ` Andy Shevchenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170102113534.127692-6-andriy.shevchenko@linux.intel.com \
--to=andriy.shevchenko@linux.intel.com \
--cc=devel@driverdev.osuosl.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=noralf@tronnes.org \
--cc=thomas.petazzoni@free-electrons.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).