diff options
Diffstat (limited to 'drivers/gpu/drm/bridge/analogix/anx7625.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/anx7625.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 920824d8df2f..14d73fb1dd15 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -384,6 +384,25 @@ static int anx7625_odfc_config(struct anx7625_data *ctx, return ret; } +/* + * The MIPI source video data exist large variation (e.g. 59Hz ~ 61Hz), + * anx7625 defined K ratio for matching MIPI input video clock and + * DP output video clock. Increase K value can match bigger video data + * variation. IVO panel has small variation than DP CTS spec, need + * decrease the K value. + */ +static int anx7625_set_k_value(struct anx7625_data *ctx) +{ + struct edid *edid = (struct edid *)ctx->slimport_edid_p.edid_raw_data; + + if (edid->mfg_id[0] == IVO_MID0 && edid->mfg_id[1] == IVO_MID1) + return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, + MIPI_DIGITAL_ADJ_1, 0x3B); + + return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, + MIPI_DIGITAL_ADJ_1, 0x3D); +} + static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx) { struct device *dev = &ctx->client->dev; @@ -470,9 +489,8 @@ static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx) MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff); ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0, (n & 0xff)); - /* Diff */ - ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, - MIPI_DIGITAL_ADJ_1, 0x3D); + + anx7625_set_k_value(ctx); ret |= anx7625_odfc_config(ctx, post_divider - 1); |