This patch to am300epd uses the batch gpiolib set/get API in order
to significantly improve performance when transferring framebuffer
data.
Cc: David Brownell <david-b@xxxxxxxxxxx>
Cc: Eric Miao <eric.miao@xxxxxxxxxxx>
Cc: Paulius Zaleckas <paulius.zaleckas@xxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxxxxx
Cc: linux-fbdev-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-embedded@xxxxxxxxxxxxxxx
Signed-off-by: Jaya Kumar <jayakumar.lkml@xxxxxxxxx>
---
arch/arm/mach-pxa/am300epd.c | 23 ++++++++++++-----------
1 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/arch/arm/mach-pxa/am300epd.c b/arch/arm/mach-pxa/am300epd.c
index 4bd10a1..237e3be 100644
--- a/arch/arm/mach-pxa/am300epd.c
+++ b/arch/arm/mach-pxa/am300epd.c
@@ -187,24 +187,25 @@ static void am300_cleanup(struct broadsheetfb_par *par)
static u16 am300_get_hdb(struct broadsheetfb_par *par)
{
- u16 res = 0;
- int i;
-
- for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++)
- res |= (gpio_get_value(DB0_GPIO_PIN + i)) ? (1 << i) : 0;
+ int err;
+ u32 val;
- return res;
+ err = gpio_get_batch(DB0_GPIO_PIN, 0xFFFF, &val);
+ if (err) {
+ dev_err(&am300_device->dev, "get failed: %d\n", err);
+ return 0;
+ }
+ return (u16) val;
}
static void am300_set_hdb(struct broadsheetfb_par *par, u16 data)
{
- int i;
-
- for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++)
- gpio_set_value(DB0_GPIO_PIN + i, (data >> i) & 0x01);
+ int err;
+ err = gpio_set_batch(DB0_GPIO_PIN, 0xFFFF, data);
+ if (err)
+ dev_err(&am300_device->dev, "set failed: %d\n", err);
}
-
static void am300_set_ctl(struct broadsheetfb_par *par, unsigned char bit,
u8 state)
{
--
1.5.2.3
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