Martin Roth (martinroth@google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16364
-gerrit
commit e25ea49d6cae34085a5bb1b2755de28a6330845e Author: Jitao Shi jitao.shi@mediatek.com Date: Wed Aug 17 10:21:37 2016 +0800
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 --- src/drivers/parade/ps8640/ps8640.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/src/drivers/parade/ps8640/ps8640.c b/src/drivers/parade/ps8640/ps8640.c index 884b46af..c26c6ef 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);