2020-09-10 02:14:48

by 赵军奎

Subject: [PATCH] drm/amd/display: optimize code runtime a bit

In fnction is_cr_done & is_ch_eq_done, when done = false
happened once, no need to circle left ln_count.
This change is to make the code run a bit fast.

Signed-off-by: Bernard Zhao <[email protected]>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index b2be6ad5101d..53e30be8b66a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -373,34 +373,30 @@ static void dpcd_set_lt_pattern_and_lane_settings(
static bool is_cr_done(enum dc_lane_count ln_count,
union lane_status *dpcd_lane_status)
{
- bool done = true;
uint32_t lane;
/*LANEx_CR_DONE bits All 1's?*/
for (lane = 0; lane < (uint32_t)(ln_count); lane++) {
if (!dpcd_lane_status[lane].bits.CR_DONE_0)
- done = false;
+ return false;
}
- return done;
-
+ return true;
}

static bool is_ch_eq_done(enum dc_lane_count ln_count,
union lane_status *dpcd_lane_status,
union lane_align_status_updated *lane_status_updated)
{
- bool done = true;
uint32_t lane;
if (!lane_status_updated->bits.INTERLANE_ALIGN_DONE)
- done = false;
+ return false;
else {
for (lane = 0; lane < (uint32_t)(ln_count); lane++) {
if (!dpcd_lane_status[lane].bits.SYMBOL_LOCKED_0 ||
!dpcd_lane_status[lane].bits.CHANNEL_EQ_DONE_0)
- done = false;
+ return false;
}
}
- return done;
-
+ return true;
}

static void update_drive_settings(
--
2.28.0

2020-09-15 19:31:08

by Alex Deucher

Subject: Re: [PATCH] drm/amd/display: optimize code runtime a bit

Applied. Thanks!

Alex

On Thu, Sep 10, 2020 at 3:23 AM Bernard Zhao <[email protected]> wrote:
>
> In fnction is_cr_done & is_ch_eq_done, when done = false
> happened once, no need to circle left ln_count.
> This change is to make the code run a bit fast.
>
> Signed-off-by: Bernard Zhao <[email protected]>
> ---
> drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 14 +++++---------
> 1 file changed, 5 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> index b2be6ad5101d..53e30be8b66a 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> @@ -373,34 +373,30 @@ static void dpcd_set_lt_pattern_and_lane_settings(
> static bool is_cr_done(enum dc_lane_count ln_count,
> union lane_status *dpcd_lane_status)
> {
> - bool done = true;
> uint32_t lane;
> /*LANEx_CR_DONE bits All 1's?*/
> for (lane = 0; lane < (uint32_t)(ln_count); lane++) {
> if (!dpcd_lane_status[lane].bits.CR_DONE_0)
> - done = false;
> + return false;
> }
> - return done;
> -
> + return true;
> }
>
> static bool is_ch_eq_done(enum dc_lane_count ln_count,
> union lane_status *dpcd_lane_status,
> union lane_align_status_updated *lane_status_updated)
> {
> - bool done = true;
> uint32_t lane;
> if (!lane_status_updated->bits.INTERLANE_ALIGN_DONE)
> - done = false;
> + return false;
> else {
> for (lane = 0; lane < (uint32_t)(ln_count); lane++) {
> if (!dpcd_lane_status[lane].bits.SYMBOL_LOCKED_0 ||
> !dpcd_lane_status[lane].bits.CHANNEL_EQ_DONE_0)
> - done = false;
> + return false;
> }
> }
> - return done;
> -
> + return true;
> }
>
> static void update_drive_settings(
> --
> 2.28.0
>
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