Hi Sean,
On 09/12/2016 09:51 PM, Sean Paul wrote:
On Fri, Sep 9, 2016 at 5:44 AM, Yakir Yang <ykk@xxxxxxxxxxxxxx> wrote:
Signed-off-by: Yakir Yang <ykk@xxxxxxxxxxxxxx>
---
Changes in v3:
- Suggested by Sean
Changes in v2: None
drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 3 ++-
drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 18 +++++++++---------
2 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
index a15f076..d564e90 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -16,10 +16,11 @@
#include <drm/drm_crtc.h>
#include <drm/drm_dp_helper.h>
-#define DP_TIMEOUT_LOOP_COUNT 100
#define MAX_CR_LOOP 5
#define MAX_EQ_LOOP 5
+#define DP_TIMEOUT_LOOP_MS msecs_to_jiffies(1)
The name suggests the units here are ms, but you're storing jiffies.
Do the msecs_to_jiffies conversion down below.
I suddenly realized that 'analogix_dp_core.c' also used the
'DP_TIMEOUT_LOOP_COUNT' macros, and 'analogix_dp_core.c' have four kinds
of timeout,
- DP_TIMEOUT_LOOP_COUNT * 1us
- DP_TIMEOUT_LOOP_COUNT * 10us
- DP_TIMEOUT_LOOP_COUNT * 100us
- DP_TIMEOUT_LOOP_COUNT * 1000us
I may guess it's not necessary to replace the 'DP_TIMEOUT_LOOP_COUNT'
now :-)
- Yakir
+
/* DP_MAX_LANE_COUNT */
#define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1)
#define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
index a4d17b8..15a4cf0 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -335,7 +335,7 @@ void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
{
u32 reg;
- int timeout_loop = 0;
+ unsigned long timeout;
analogix_dp_set_analog_power_down(dp, POWER_ALL, 0);
@@ -350,9 +350,9 @@ void analogix_dp_init_analog_func(struct analogix_dp_device *dp)
if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
analogix_dp_set_pll_power_down(dp, 0);
+ timeout = jiffies + DP_TIMEOUT_LOOP_MS;
timeout = jiffies + msecs_to_jiffies(DP_TIMEOUT_LOOP_MS);
while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
- timeout_loop++;
- if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
+ if (time_after(jiffies, timeout)) {
dev_err(dp->dev, "failed to get pll lock status\n");
return;
}
@@ -501,7 +501,7 @@ int analogix_dp_start_aux_transaction(struct analogix_dp_device *dp)
{
int reg;
int retval = 0;
- int timeout_loop = 0;
+ unsigned long timeout;
/* Enable AUX CH operation */
reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2);
@@ -509,10 +509,10 @@ int analogix_dp_start_aux_transaction(struct analogix_dp_device *dp)
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2);
/* Is AUX CH command reply received? */
+ timeout = jiffies + DP_TIMEOUT_LOOP_MS;
reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
while (!(reg & RPLY_RECEIV)) {
- timeout_loop++;
- if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) {
+ if (time_after(jiffies, timeout)) {
dev_err(dp->dev, "AUX CH command reply failed!\n");
return -ETIMEDOUT;
}
@@ -1055,7 +1055,7 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
{
u32 reg;
u8 *buffer = msg->buffer;
- int timeout_loop = 0;
+ unsigned long timeout;
unsigned int i;
int num_transferred = 0;
@@ -1123,10 +1123,10 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
/* Is AUX CH command reply received? */
/* TODO: Wait for an interrupt instead of looping? */
+ timeout = jiffies + DP_TIMEOUT_LOOP_MS;
reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
while (!(reg & RPLY_RECEIV)) {
- timeout_loop++;
- if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) {
+ if (time_after(jiffies, timeout)) {
dev_err(dp->dev, "AUX CH command reply failed!\n");
return -ETIMEDOUT;
}
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
