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changed brightness levels #9

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changed brightness levels #9

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5b31efc
Added Samsung N350.
xonatius Apr 21, 2011
2dadfdd
README clone fix.
xonatius Apr 21, 2011
c6413b2
Added samsung R470/R420 support
xonatius May 9, 2011
fb7173e
Added R528/R728.
xonatius Jun 10, 2011
00116d8
changed brightness levels (lowest level was too high for nighttime)
proton Aug 31, 2011
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5 changes: 4 additions & 1 deletion README
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,9 @@ Currently supported:
* NF110/NF210/NF310
* N220
* N230
* N350
* R470/R420
* R528/R728

Not tested:

Expand All @@ -31,7 +34,7 @@ Have a similar problem, but need more information to add it (if you are owner of

## Installation

git clone https://xonatius@github.com/xonatius/samsung-backlight.git
git clone git://github.com/xonatius/samsung-backlight.git
cd samsung-backlight
make
sudo make install
Expand Down
51 changes: 41 additions & 10 deletions samsung-backlight.c
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
/*
* Samsung N130, N220, N230 NC10, Np-Q45, R468/R418, X320/X420/X520, X360,
* R518, R510/P510, R410 and NF110/NF210/NF310 Laptop Backlight driver
* R518, R510/P510, R410, NF110/NF210/NF310, N350, R470/R420, R528/R728
* Laptop Backlight driver
*
* Copyright (C) 2011 Peter Savichev (proton) ([email protected])
* Copyright (C) 2010 xonatius ([email protected])
Expand Down Expand Up @@ -31,9 +32,9 @@
* overkill, that's fine. So let's map the 256 values to 8 different ones:
*
* userspace 0 1 2 3 4 5 6 7
* hardware 31 63 95 127 159 195 223 255
* hardware 3 39 75 111 147 183 219 255
*
* or hardware = ((userspace + 1) * 32)-1
* or hardware = (userspace * 36) + 3
*
* Note, we keep value 0 at a positive value, otherwise the screen goes
* blank because HAL likes to set the backlight to 0 at startup when there is
Expand All @@ -54,15 +55,15 @@ static u8 read_brightness(void)
u8 user_brightness = 0;

pci_read_config_byte(pci_device, offset, &kernel_brightness);
user_brightness = ((kernel_brightness + 1) / 32) - 1;
user_brightness = (kernel_brightness - 3) / 36;
return user_brightness;
}

static void set_brightness(u8 user_brightness)
{
u16 kernel_brightness = 0;

kernel_brightness = ((user_brightness + 1) * 32) - 1;
kernel_brightness = (user_brightness * 36) + 3;
pci_write_config_byte(pci_device, offset, (u8)kernel_brightness);
}

Expand Down Expand Up @@ -207,7 +208,33 @@ static struct dmi_system_id __initdata samsung_dmi_table[] = {
},
.callback = dmi_check_cb,
},

{
.ident = "N350",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "N350"),
DMI_MATCH(DMI_BOARD_NAME, "N350"),
},
.callback = dmi_check_cb,
},
{
.ident = "R470/R420",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "R470/R420"),
DMI_MATCH(DMI_BOARD_NAME, "R470/R420"),
},
.callback = dmi_check_cb,
},
{
.ident = "R528/R728",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "R528/R728"),
DMI_MATCH(DMI_BOARD_NAME, "R528/R728"),
},
.callback = dmi_check_cb,
},
{ },
};

Expand All @@ -222,21 +249,22 @@ static int __init samsung_init(void)
/*
* The Samsung N120, N130, and NC10 use pci device id 0x27ae, while the
* NP-Q45 uses 0x2a02
* R410P, R468/R418, R518, R510/P510, X320/X420/X520 and X360 uses 0x2a42
* N220 and NF110/NF210/NF310 uses 0xa011
* R410P, R468/R418, R518, R510/P510, X320/X420/X520, X360, R470/R420
* and R528/R728 uses 0x2a42
* N220, NF110/NF210/NF310 and N350 uses 0xa011
* Odds are we might need to add more to the
* list over time...
*/
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0x27ae, NULL);
if (!pci_device)
if (!pci_device)
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0x2a02, NULL);
if (!pci_device)
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0x2a42, NULL);
if (!pci_device)
pci_device = pci_get_device(PCI_VENDOR_ID_INTEL, 0xa011, NULL);
if (!pci_device)
return -ENODEV;


/* create a backlight device to talk to this one */
backlight_device = backlight_device_register("samsung",
Expand Down Expand Up @@ -282,3 +310,6 @@ MODULE_ALIAS("dmi:*:svnSAMSUNGELECTRONICSCO.,LTD.:pnR510/P510:*:rnR510/P510:*");
MODULE_ALIAS("dmi:*:svnSAMSUNGELECTRONICSCO.,LTD.:pnNF110/NF210/NF310:*:rnNF110/NF210/NF310:*");
MODULE_ALIAS("dmi:*:svnSAMSUNGELECTRONICSCO.,LTD.:pnN220:*:rnN220:*");
MODULE_ALIAS("dmi:*:svnSAMSUNGELECTRONICSCO.,LTD.:pnN230:*:rnN230:*");
MODULE_ALIAS("dmi:*:svnSAMSUNGELECTRONICSCO.,LTD.:pnN350:*:rnN350:*");
MODULE_ALIAS("dmi:*:svnSAMSUNGELECTRONICSCO.,LTD.:pnR470/R420:*:rnR470/R420:*");
MODULE_ALIAS("dmi:*:svnSAMSUNGELECTRONICSCO.,LTD.:pnR528/R728:*:rnR528/R728:*");