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authorDmitry Baryshkov <dbaryshkov@gmail.com>2008-12-04 11:54:42 -0500
committerRichard Purdie <rpurdie@linux.intel.com>2009-01-08 07:37:28 -0500
commit0ec561f4b648260a46ace87acbc558241808455f (patch)
tree90251110dca00d7117bc9630250caa1fc613c624 /drivers/video/backlight
parent9a2c61a921a8aeabacaccad0d2fdf75e1c1475fb (diff)
backlight: Support VGA/QVGA mode switching in tosa_lcd
LCD driver on tosa requires reprogramming TG after mode switching. Add support for switching to QVGA mode. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'drivers/video/backlight')
-rw-r--r--drivers/video/backlight/tosa_lcd.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/video/backlight/tosa_lcd.c b/drivers/video/backlight/tosa_lcd.c
index 57a26649f1a5..b7fbc75a62fc 100644
--- a/drivers/video/backlight/tosa_lcd.c
+++ b/drivers/video/backlight/tosa_lcd.c
@@ -39,6 +39,7 @@ struct tosa_lcd_data {
39 struct i2c_client *i2c; 39 struct i2c_client *i2c;
40 40
41 int lcd_power; 41 int lcd_power;
42 bool is_vga;
42}; 43};
43 44
44static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data) 45static int tosa_tg_send(struct spi_device *spi, int adrs, uint8_t data)
@@ -81,8 +82,12 @@ static void tosa_lcd_tg_init(struct tosa_lcd_data *data)
81static void tosa_lcd_tg_on(struct tosa_lcd_data *data) 82static void tosa_lcd_tg_on(struct tosa_lcd_data *data)
82{ 83{
83 struct spi_device *spi = data->spi; 84 struct spi_device *spi = data->spi;
84 const int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR; 85 int value = TG_REG0_COLOR | TG_REG0_UD | TG_REG0_LR;
85 tosa_tg_send(spi, TG_PNLCTL, value | TG_REG0_VQV); /* this depends on mode */ 86
87 if (data->is_vga)
88 value |= TG_REG0_VQV;
89
90 tosa_tg_send(spi, TG_PNLCTL, value);
86 91
87 /* TG LCD pannel power up */ 92 /* TG LCD pannel power up */
88 tosa_tg_send(spi, TG_PINICTL,0x4); 93 tosa_tg_send(spi, TG_PINICTL,0x4);
@@ -142,9 +147,25 @@ static int tosa_lcd_get_power(struct lcd_device *lcd)
142 return data->lcd_power; 147 return data->lcd_power;
143} 148}
144 149
150static int tosa_lcd_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
151{
152 struct tosa_lcd_data *data = lcd_get_data(lcd);
153
154 if (mode->xres == 320 || mode->yres == 320)
155 data->is_vga = false;
156 else
157 data->is_vga = true;
158
159 if (POWER_IS_ON(data->lcd_power))
160 tosa_lcd_tg_on(data);
161
162 return 0;
163}
164
145static struct lcd_ops tosa_lcd_ops = { 165static struct lcd_ops tosa_lcd_ops = {
146 .set_power = tosa_lcd_set_power, 166 .set_power = tosa_lcd_set_power,
147 .get_power = tosa_lcd_get_power, 167 .get_power = tosa_lcd_get_power,
168 .set_mode = tosa_lcd_set_mode,
148}; 169};
149 170
150static int __devinit tosa_lcd_probe(struct spi_device *spi) 171static int __devinit tosa_lcd_probe(struct spi_device *spi)
@@ -156,6 +177,8 @@ static int __devinit tosa_lcd_probe(struct spi_device *spi)
156 if (!data) 177 if (!data)
157 return -ENOMEM; 178 return -ENOMEM;
158 179
180 data->is_vga = true; /* defaut to VGA mode */
181
159 /* 182 /*
160 * bits_per_word cannot be configured in platform data 183 * bits_per_word cannot be configured in platform data
161 */ 184 */