diff options
| author | Jitao Shi <jitao.shi@mediatek.com> | 2016-08-17 10:21:37 +0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-08-31 19:58:31 +0200 |
| commit | 54aa89c7b4ea793f49f6cfe73e13b4ce71dd138f (patch) | |
| tree | 9b7f50cddfb5650d4f50802f46d99b11fd88e468 /src/drivers/parade/ps8640 | |
| parent | a4e7165fd1c2b6d7a548cfb65f171f3e2a6879f8 (diff) | |
parade/ps8640: add delay to every loop when polling ps8640 ready
Add delay before and in polling ps8640 ready to reduce the frequency
of polling.
BUG=chrome-os-partner:54897
BRANCH=none
TEST=build pass elm and show ui
Change-Id: I43c833af910490e53496a343330a6a6af35623a9
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: bc8c3d6f7cf0b2da693a465cf3845e8bbc53825a
Original-Change-Id: I5c725eed8110ff9f545c1142ca28bcff336b6860
Original-Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/371718
Original-Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Original-Tested-by: jitao shi <jitao.shi@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Reviewed-on: https://review.coreboot.org/16364
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/drivers/parade/ps8640')
| -rw-r--r-- | src/drivers/parade/ps8640/ps8640.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/drivers/parade/ps8640/ps8640.c b/src/drivers/parade/ps8640/ps8640.c index 884b46af5f..c26c6effb7 100644 --- a/src/drivers/parade/ps8640/ps8640.c +++ b/src/drivers/parade/ps8640/ps8640.c @@ -60,16 +60,22 @@ int ps8640_init(uint8_t bus, uint8_t chip) u8 set_vdo_done; struct stopwatch sw; - stopwatch_init_msecs_expire(&sw, 350); + mdelay(200); + stopwatch_init_msecs_expire(&sw, 200); - do { + while (true) { i2c_readb(bus, chip + 2, PAGE2_GPIO_H, &set_vdo_done); + if ((set_vdo_done & PS_GPIO9) == PS_GPIO9) + break; if (stopwatch_expired(&sw)) { printk(BIOS_INFO, "Failed to init ps8640.\n"); return -1; } - } while ((set_vdo_done & PS_GPIO9) != PS_GPIO9); + mdelay(20); + } + + mdelay(50); i2c_writeb(bus, chip + 3, PAGE3_SET_ADD, VDO_CTL_ADD); i2c_writeb(bus, chip + 3, PAGE3_SET_VAL, VDO_DIS); i2c_writeb(bus, chip + 3, PAGE3_SET_ADD, VDO_CTL_ADD); |