diff options
| author | Andrzej Hajda <a.hajda@samsung.com> | 2017-02-01 08:47:30 +0100 |
|---|---|---|
| committer | Archit Taneja <architt@codeaurora.org> | 2017-02-02 15:15:22 +0530 |
| commit | e9c6da270aaae54fb67aeb5858c456f3beffa6d9 (patch) | |
| tree | 40e05840d819bcb9a0a13179d4c70e2753e08b9a /drivers/gpu/drm/bridge/sil-sii8620.c | |
| parent | bb4954c77c2515f383f8828b18c2a7357455d3d1 (diff) | |
drm/bridge/sii8620: add reading device capability registers
This functionality is necessary to implement MHL3 modes.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1485935272-17337-4-git-send-email-a.hajda@samsung.com
Diffstat (limited to 'drivers/gpu/drm/bridge/sil-sii8620.c')
| -rw-r--r-- | drivers/gpu/drm/bridge/sil-sii8620.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c index 50af78f07d9c..75867c0735de 100644 --- a/drivers/gpu/drm/bridge/sil-sii8620.c +++ b/drivers/gpu/drm/bridge/sil-sii8620.c @@ -286,6 +286,12 @@ static void sii8620_mt_msc_cmd_send(struct sii8620 *ctx, sii8620_write(ctx, REG_MSC_COMMAND_START, BIT_MSC_COMMAND_START_MSC_MSG); break; + case MHL_READ_DEVCAP_REG: + case MHL_READ_XDEVCAP_REG: + sii8620_write(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg[1]); + sii8620_write(ctx, REG_MSC_COMMAND_START, + BIT_MSC_COMMAND_START_READ_DEVCAP); + break; default: dev_err(ctx->dev, "%s: command %#x not supported\n", __func__, msg->reg[0]); @@ -455,6 +461,35 @@ static void sii8620_mt_read_devcap(struct sii8620 *ctx, bool xdevcap) msg->recv = sii8620_mt_read_devcap_recv; } +static void sii8620_mt_read_devcap_reg_recv(struct sii8620 *ctx, + struct sii8620_mt_msg *msg) +{ + u8 reg = msg->reg[0] & 0x7f; + + if (msg->reg[0] & 0x80) + ctx->xdevcap[reg] = msg->ret; + else + ctx->devcap[reg] = msg->ret; +} + +static void sii8620_mt_read_devcap_reg(struct sii8620 *ctx, u8 reg) +{ + struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx); + + if (!msg) + return; + + msg->reg[0] = (reg & 0x80) ? MHL_READ_XDEVCAP_REG : MHL_READ_DEVCAP_REG; + msg->reg[1] = reg; + msg->send = sii8620_mt_msc_cmd_send; + msg->recv = sii8620_mt_read_devcap_reg_recv; +} + +static inline void sii8620_mt_read_xdevcap_reg(struct sii8620 *ctx, u8 reg) +{ + sii8620_mt_read_devcap_reg(ctx, reg | 0x80); +} + static void sii8620_fetch_edid(struct sii8620 *ctx) { u8 lm_ddc, ddc_cmd, int3, cbus; |