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authorAndrey Gusakov <andrey.gusakov@cogentembedded.com>2017-07-05 20:18:11 +0300
committerLucas Stach <l.stach@pengutronix.de>2017-07-06 14:43:17 +0200
commitf3d43a08fd0669e6be2130225d96d6b048034c47 (patch)
tree88c192bc2e934ed5a4fff0666b5551c6f8b9e19d /drivers/video
parent7d01689330394e7105d6e34b9c67cac2caf46ce2 (diff)
downloadbarebox-f3d43a08fd0669e6be2130225d96d6b048034c47.tar.gz
barebox-f3d43a08fd0669e6be2130225d96d6b048034c47.tar.xz
video: tc358767: optimize DPCD register write
Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/tc358767.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/video/tc358767.c b/drivers/video/tc358767.c
index cd56bb4f43..246b49e076 100644
--- a/drivers/video/tc358767.c
+++ b/drivers/video/tc358767.c
@@ -35,6 +35,7 @@
#include <asm-generic/div64.h>
#define DP_LINK_BW_SET 0x100
+#define DP_ENHANCED_FRAME_EN (1 << 7)
#define DP_TRAINING_PATTERN_SET 0x102
#define TRAINING_LANE0_SET 0x103
@@ -892,7 +893,7 @@ static int tc_main_link_setup(struct tc_data *tc)
bool ready;
u32 value;
int ret;
- u8 tmp[8];
+ u8 tmp[16];
/* display mode should be set at this point */
if (!tc->mode)
@@ -993,21 +994,22 @@ static int tc_main_link_setup(struct tc_data *tc)
/* LANE_COUNT_SET */
tmp[1] = tc->link.lanes;
if (tc->link.enhanced)
- tmp[1] |= (1 << 7);
- ret = tc_aux_write(tc, DP_LINK_BW_SET, tmp, 2);
- if (ret)
- goto err_dpcd_write;
+ tmp[1] |= DP_ENHANCED_FRAME_EN;
- /* TRAINING_LANE0_SET .. TRAINING_LANE3_SET */
- tmp[0] = 0x00;
- tmp[1] = 0x00;
+ /* TRAINING_PATTERN_SET */
tmp[2] = 0x00;
+ /* TRAINING_LANE0_SET .. TRAINING_LANE3_SET */
tmp[3] = 0x00;
+ tmp[4] = 0x00;
+ tmp[5] = 0x00;
+ tmp[6] = 0x00;
/* DOWNSPREAD_CTRL */
- tmp[4] = tc->link.spread ? DP_SPREAD_AMP_0_5 : 0x00;
+ tmp[7] = tc->link.spread ? DP_SPREAD_AMP_0_5 : 0x00;
/* MAIN_LINK_CHANNEL_CODING_SET */
- tmp[5] = tc->link.coding8b10b ? DP_SET_ANSI_8B10B : 0x00;
- ret = tc_aux_write(tc, TRAINING_LANE0_SET, tmp, 6);
+ tmp[8] = tc->link.coding8b10b ? DP_SET_ANSI_8B10B : 0x00;
+
+ /* DP_LINK_BW_SET .. MAIN_LINK_CHANNEL_CODING_SET */
+ ret = tc_aux_write(tc, DP_LINK_BW_SET, tmp, 9);
if (ret)
goto err_dpcd_write;