From 93a105694f7dbf47ea5e8c60a04502fb72c3fc34 Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Tue, 18 Jun 2019 22:27:02 -0700 Subject: [PATCH] drm/bridge: tc358767: Simplify tc_poll_timeout() Implementation of tc_poll_timeout() is almost a 100% copy-and-paste of the code for regmap_read_poll_timeout(). Replace copied code with a call to the original. While at it change tc_poll_timeout to accept "struct tc_data *" instead of "struct regmap *" for brevity. No functional change intended. Signed-off-by: Andrey Smirnov Reviewed-by: Andrzej Hajda Reviewed-by: Laurent Pinchart Reviewed-by: Tomi Valkeinen Cc: Andrzej Hajda Cc: Laurent Pinchart Cc: Tomi Valkeinen Cc: Andrey Gusakov Cc: Philipp Zabel Cc: Cory Tusar Cc: Chris Healy Cc: Lucas Stach Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Andrzej Hajda Link: https://patchwork.freedesktop.org/patch/msgid/20190619052716.16831-2-andrew.smirnov@gmail.com --- drivers/gpu/drm/bridge/tc358767.c | 26 ++++++-------------------- 1 file changed, 6 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index 13ade28a36a8..684944f8e866 100644 --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -255,34 +255,21 @@ static inline struct tc_data *connector_to_tc(struct drm_connector *c) goto err; \ } while (0) -static inline int tc_poll_timeout(struct regmap *map, unsigned int addr, +static inline int tc_poll_timeout(struct tc_data *tc, unsigned int addr, unsigned int cond_mask, unsigned int cond_value, unsigned long sleep_us, u64 timeout_us) { - ktime_t timeout = ktime_add_us(ktime_get(), timeout_us); unsigned int val; - int ret; - for (;;) { - ret = regmap_read(map, addr, &val); - if (ret) - break; - if ((val & cond_mask) == cond_value) - break; - if (timeout_us && ktime_compare(ktime_get(), timeout) > 0) { - ret = regmap_read(map, addr, &val); - break; - } - if (sleep_us) - usleep_range((sleep_us >> 2) + 1, sleep_us); - } - return ret ?: (((val & cond_mask) == cond_value) ? 0 : -ETIMEDOUT); + return regmap_read_poll_timeout(tc->regmap, addr, val, + (val & cond_mask) == cond_value, + sleep_us, timeout_us); } static int tc_aux_wait_busy(struct tc_data *tc, unsigned int timeout_ms) { - return tc_poll_timeout(tc->regmap, DP0_AUXSTATUS, AUX_BUSY, 0, + return tc_poll_timeout(tc, DP0_AUXSTATUS, AUX_BUSY, 0, 1000, 1000 * timeout_ms); } @@ -589,8 +576,7 @@ static int tc_aux_link_setup(struct tc_data *tc) tc_write(DP1_PLLCTRL, PLLUPDATE | PLLEN); tc_wait_pll_lock(tc); - ret = tc_poll_timeout(tc->regmap, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 1, - 1000); + ret = tc_poll_timeout(tc, DP_PHY_CTRL, PHY_RDY, PHY_RDY, 1, 1000); if (ret == -ETIMEDOUT) { dev_err(tc->dev, "Timeout waiting for PHY to become ready"); return ret; -- 2.30.2