From: Thierry Reding <tred...@nvidia.com>
During the discussion of patches that enhance the drm_dp_link helpers it
was concluded that these helpers aren't very useful to begin with. Start
pushing the equivalent code into individual drivers to ultimately remove
them.
Signed-off-by: Thierry Reding <tred...@nvidia.com>
---
drivers/gpu/drm/msm/edp/edp_ctrl.c | 70 +++++++++++++++++++++---------
1 file changed, 49 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/msm/edp/edp_ctrl.c
b/drivers/gpu/drm/msm/edp/edp_ctrl.c
index 7f3dd3ffe2c9..0d9657cc70db 100644
--- a/drivers/gpu/drm/msm/edp/edp_ctrl.c
+++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c
@@ -89,7 +89,6 @@ struct edp_ctrl {
/* edid raw data */
struct edid *edid;
- struct drm_dp_link dp_link;
struct drm_dp_aux *drm_aux;
/* dpcd raw data */
@@ -403,7 +402,7 @@ static void edp_fill_link_cfg(struct edp_ctrl *ctrl)
u32 prate;
u32 lrate;
u32 bpp;
- u8 max_lane = ctrl->dp_link.num_lanes;
+ u8 max_lane = drm_dp_max_lane_count(ctrl->dpcd);
u8 lane;
prate = ctrl->pixel_rate;
@@ -413,7 +412,7 @@ static void edp_fill_link_cfg(struct edp_ctrl *ctrl)
* By default, use the maximum link rate and minimum lane count,
* so that we can do rate down shift during link training.
*/
- ctrl->link_rate = drm_dp_link_rate_to_bw_code(ctrl->dp_link.rate);
+ ctrl->link_rate = ctrl->dpcd[DP_MAX_LINK_RATE];
prate *= bpp;
prate /= 8; /* in kByte */
@@ -439,7 +438,7 @@ static void edp_config_ctrl(struct edp_ctrl *ctrl)
data = EDP_CONFIGURATION_CTRL_LANES(ctrl->lane_cnt - 1);
- if (ctrl->dp_link.capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
+ if (drm_dp_enhanced_frame_cap(ctrl->dpcd))
data |= EDP_CONFIGURATION_CTRL_ENHANCED_FRAMING;
depth = EDP_6BIT;
@@ -701,7 +700,7 @@ static int edp_link_rate_down_shift(struct edp_ctrl *ctrl)
rate = ctrl->link_rate;
lane = ctrl->lane_cnt;
- max_lane = ctrl->dp_link.num_lanes;
+ max_lane = drm_dp_max_lane_count(ctrl->dpcd);
bpp = ctrl->color_depth * 3;
prate = ctrl->pixel_rate;
@@ -751,18 +750,22 @@ static int edp_clear_training_pattern(struct edp_ctrl
*ctrl)
static int edp_do_link_train(struct edp_ctrl *ctrl)
{
+ u8 values[2];
int ret;
- struct drm_dp_link dp_link;
DBG("");
/*
* Set the current link rate and lane cnt to panel. They may have been
* adjusted and the values are different from them in DPCD CAP
*/
- dp_link.num_lanes = ctrl->lane_cnt;
- dp_link.rate = drm_dp_bw_code_to_link_rate(ctrl->link_rate);
- dp_link.capabilities = ctrl->dp_link.capabilities;
- if (drm_dp_link_configure(ctrl->drm_aux, &dp_link) < 0)
+ values[0] = ctrl->lane_cnt;
+ values[1] = ctrl->link_rate;
+
+ if (drm_dp_enhanced_frame_cap(ctrl->dpcd))
+ values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+
+ if (drm_dp_dpcd_write(ctrl->drm_aux, DP_LINK_BW_SET, values,
+ sizeof(values)) < 0)
return EDP_TRAIN_FAIL;
ctrl->v_level = 0; /* start from default level */
@@ -952,6 +955,7 @@ static void edp_ctrl_on_worker(struct work_struct *work)
{
struct edp_ctrl *ctrl = container_of(
work, struct edp_ctrl, on_work);
+ u8 value;
int ret;
mutex_lock(&ctrl->dev_mutex);
@@ -965,9 +969,27 @@ static void edp_ctrl_on_worker(struct work_struct *work)
edp_ctrl_link_enable(ctrl, 1);
edp_ctrl_irq_enable(ctrl, 1);
- ret = drm_dp_link_power_up(ctrl->drm_aux, &ctrl->dp_link);
- if (ret)
- goto fail;
+
+ /* DP_SET_POWER register is only available on DPCD v1.1 and later */
+ if (ctrl->dpcd[DP_DPCD_REV] >= 0x11) {
+ ret = drm_dp_dpcd_readb(ctrl->drm_aux, DP_SET_POWER, &value);
+ if (ret < 0)
+ goto fail;
+
+ value &= ~DP_SET_POWER_MASK;
+ value |= DP_SET_POWER_D0;
+
+ ret = drm_dp_dpcd_writeb(ctrl->drm_aux, DP_SET_POWER, value);
+ if (ret < 0)
+ goto fail;
+
+ /*
+ * According to the DP 1.1 specification, a "Sink Device must
+ * exit the power saving state within 1 ms" (Section 2.5.3.1,
+ * Table 5-52, "Sink Control Field" (register 0x600).
+ */
+ usleep_range(1000, 2000);
+ }
ctrl->power_on = true;
@@ -1011,7 +1033,19 @@ static void edp_ctrl_off_worker(struct work_struct *work)
edp_state_ctrl(ctrl, 0);
- drm_dp_link_power_down(ctrl->drm_aux, &ctrl->dp_link);
+ /* DP_SET_POWER register is only available on DPCD v1.1 and later */
+ if (ctrl->dpcd[DP_DPCD_REV] >= 0x11) {
+ u8 value;
+ int ret;
+
+ ret = drm_dp_dpcd_readb(ctrl->drm_aux, DP_SET_POWER, &value);
+ if (ret > 0) {
+ value &= ~DP_SET_POWER_MASK;
+ value |= DP_SET_POWER_D3;
+
+ drm_dp_dpcd_writeb(ctrl->drm_aux, DP_SET_POWER, value);
+ }
+ }
edp_ctrl_irq_enable(ctrl, 0);
@@ -1225,14 +1259,8 @@ int msm_edp_ctrl_get_panel_info(struct edp_ctrl *ctrl,
edp_ctrl_irq_enable(ctrl, 1);
}
- ret = drm_dp_link_probe(ctrl->drm_aux, &ctrl->dp_link);
- if (ret) {
- pr_err("%s: read dpcd cap failed, %d\n", __func__, ret);
- goto disable_ret;
- }
-
/* Initialize link rate as panel max link rate */
- ctrl->link_rate = drm_dp_link_rate_to_bw_code(ctrl->dp_link.rate);
+ ctrl->link_rate = ctrl->dpcd[DP_MAX_LINK_RATE];
ctrl->edid = drm_get_edid(connector, &ctrl->drm_aux->ddc);
if (!ctrl->edid) {
--
2.23.0
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