From: Thierry Reding treding@nvidia.com
Store capabilities in max_* fields and add separate fields for the currently selected settings. This is useful to allow the current link configuration to be stored without overwriting the capabilities.
Cc: Rob Clark robdclark@gmail.com Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/drm_dp_helper.c | 16 +++++++++++----- drivers/gpu/drm/msm/edp/edp_ctrl.c | 8 ++++---- drivers/gpu/drm/tegra/dpaux.c | 8 ++++---- drivers/gpu/drm/tegra/sor.c | 29 ++++++++++++++--------------- include/drm/drm_dp_helper.h | 7 +++++-- 5 files changed, 38 insertions(+), 30 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index 841b49652cc5..c00896ab8b04 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -290,9 +290,12 @@ static void drm_dp_link_reset(struct drm_dp_link *link) return;
link->revision = 0; - link->rate = 0; - link->num_lanes = 0; + link->max_rate = 0; + link->max_lanes = 0; link->capabilities = 0; + + link->rate = 0; + link->lanes = 0; }
/** @@ -318,12 +321,15 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link) return err;
link->revision = values[0]; - link->rate = drm_dp_bw_code_to_link_rate(values[1]); - link->num_lanes = values[2] & DP_MAX_LANE_COUNT_MASK; + link->max_rate = drm_dp_bw_code_to_link_rate(values[1]); + link->max_lanes = values[2] & DP_MAX_LANE_COUNT_MASK;
if (values[2] & DP_ENHANCED_FRAME_CAP) link->capabilities |= DP_LINK_CAP_ENHANCED_FRAMING;
+ link->rate = link->max_rate; + link->lanes = link->max_lanes; + return 0; } EXPORT_SYMBOL(drm_dp_link_probe); @@ -410,7 +416,7 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link) int err;
values[0] = drm_dp_link_rate_to_bw_code(link->rate); - values[1] = link->num_lanes; + values[1] = link->lanes;
if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING) values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; diff --git a/drivers/gpu/drm/msm/edp/edp_ctrl.c b/drivers/gpu/drm/msm/edp/edp_ctrl.c index 81200e9be382..c87a03561246 100644 --- a/drivers/gpu/drm/msm/edp/edp_ctrl.c +++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c @@ -416,7 +416,7 @@ 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 = ctrl->dp_link.max_lanes; u8 lane;
prate = ctrl->pixel_rate; @@ -426,7 +426,7 @@ 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 = drm_dp_link_rate_to_bw_code(ctrl->dp_link.max_rate);
prate *= bpp; prate /= 8; /* in kByte */ @@ -714,7 +714,7 @@ 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 = ctrl->dp_link.max_lanes;
bpp = ctrl->color_depth * 3; prate = ctrl->pixel_rate; @@ -772,7 +772,7 @@ static int edp_do_link_train(struct edp_ctrl *ctrl) * 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.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) diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c index 6aecb6647313..2c5480265ccd 100644 --- a/drivers/gpu/drm/tegra/dpaux.c +++ b/drivers/gpu/drm/tegra/dpaux.c @@ -578,14 +578,14 @@ int tegra_dpaux_train(struct tegra_dpaux *dpaux, struct drm_dp_link *link, if (tp == DP_TRAINING_PATTERN_DISABLE) return 0;
- for (i = 0; i < link->num_lanes; i++) + for (i = 0; i < link->lanes; i++) values[i] = DP_TRAIN_MAX_PRE_EMPHASIS_REACHED | DP_TRAIN_PRE_EMPH_LEVEL_0 | DP_TRAIN_MAX_SWING_REACHED | DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
err = drm_dp_dpcd_write(&dpaux->aux, DP_TRAINING_LANE0_SET, values, - link->num_lanes); + link->lanes); if (err < 0) return err;
@@ -597,13 +597,13 @@ int tegra_dpaux_train(struct tegra_dpaux *dpaux, struct drm_dp_link *link,
switch (tp) { case DP_TRAINING_PATTERN_1: - if (!drm_dp_clock_recovery_ok(status, link->num_lanes)) + if (!drm_dp_clock_recovery_ok(status, link->lanes)) return -EAGAIN;
break;
case DP_TRAINING_PATTERN_2: - if (!drm_dp_channel_eq_ok(status, link->num_lanes)) + if (!drm_dp_channel_eq_ok(status, link->lanes)) return -EAGAIN;
break; diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c index 3eff7cf75d25..7bf444bd1588 100644 --- a/drivers/gpu/drm/tegra/sor.c +++ b/drivers/gpu/drm/tegra/sor.c @@ -277,7 +277,7 @@ static int tegra_sor_dp_train_fast(struct tegra_sor *sor, if (err < 0) return err;
- for (i = 0, value = 0; i < link->num_lanes; i++) { + for (i = 0, value = 0; i < link->lanes; i++) { unsigned long lane = SOR_DP_TPG_CHANNEL_CODING | SOR_DP_TPG_SCRAMBLER_NONE | SOR_DP_TPG_PATTERN_TRAIN1; @@ -298,7 +298,7 @@ static int tegra_sor_dp_train_fast(struct tegra_sor *sor, value |= SOR_DP_SPARE_MACRO_SOR_CLK; tegra_sor_writel(sor, value, SOR_DP_SPARE0);
- for (i = 0, value = 0; i < link->num_lanes; i++) { + for (i = 0, value = 0; i < link->lanes; i++) { unsigned long lane = SOR_DP_TPG_CHANNEL_CODING | SOR_DP_TPG_SCRAMBLER_NONE | SOR_DP_TPG_PATTERN_TRAIN2; @@ -313,7 +313,7 @@ static int tegra_sor_dp_train_fast(struct tegra_sor *sor, if (err < 0) return err;
- for (i = 0, value = 0; i < link->num_lanes; i++) { + for (i = 0, value = 0; i < link->lanes; i++) { unsigned long lane = SOR_DP_TPG_CHANNEL_CODING | SOR_DP_TPG_SCRAMBLER_GALIOS | SOR_DP_TPG_PATTERN_NONE; @@ -581,11 +581,11 @@ static int tegra_sor_calc_config(struct tegra_sor *sor, u32 num_syms_per_line; unsigned int i;
- if (!link_rate || !link->num_lanes || !pclk || !config->bits_per_pixel) + if (!link_rate || !link->lanes || !pclk || !config->bits_per_pixel) return -EINVAL;
- output = link_rate * 8 * link->num_lanes; input = pclk * config->bits_per_pixel; + output = link_rate * 8 * link->lanes;
if (input >= output) return -ERANGE; @@ -628,7 +628,7 @@ static int tegra_sor_calc_config(struct tegra_sor *sor, watermark = div_u64(watermark + params.error, f); config->watermark = watermark + (config->bits_per_pixel / 8) + 2; num_syms_per_line = (mode->hdisplay * config->bits_per_pixel) * - (link->num_lanes * 8); + (link->lanes * 8);
if (config->watermark > 30) { config->watermark = 30; @@ -648,12 +648,12 @@ static int tegra_sor_calc_config(struct tegra_sor *sor, if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING) config->hblank_symbols -= 3;
- config->hblank_symbols -= 12 / link->num_lanes; + config->hblank_symbols -= 12 / link->lanes;
/* compute the number of symbols per vertical blanking interval */ num = (mode->hdisplay - 25) * link_rate; config->vblank_symbols = div_u64(num, pclk); - config->vblank_symbols -= 36 / link->num_lanes + 4; + config->vblank_symbols -= 36 / link->lanes + 4;
dev_dbg(sor->dev, "blank symbols: H:%u V:%u\n", config->hblank_symbols, config->vblank_symbols); @@ -1340,17 +1340,17 @@ static void tegra_sor_edp_enable(struct drm_encoder *encoder) /* power DP lanes */ value = tegra_sor_readl(sor, SOR_DP_PADCTL0);
- if (link.num_lanes <= 2) + if (link.lanes <= 2) value &= ~(SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2); else value |= SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2;
- if (link.num_lanes <= 1) + if (link.lanes <= 1) value &= ~SOR_DP_PADCTL_PD_TXD_1; else value |= SOR_DP_PADCTL_PD_TXD_1;
- if (link.num_lanes == 0) + if (link.lanes == 0) value &= ~SOR_DP_PADCTL_PD_TXD_0; else value |= SOR_DP_PADCTL_PD_TXD_0; @@ -1359,7 +1359,7 @@ static void tegra_sor_edp_enable(struct drm_encoder *encoder)
value = tegra_sor_readl(sor, SOR_DP_LINKCTL0); value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK; - value |= SOR_DP_LINKCTL_LANE_COUNT(link.num_lanes); + value |= SOR_DP_LINKCTL_LANE_COUNT(link.lanes); tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
/* start lane sequencer */ @@ -1453,7 +1453,7 @@ static void tegra_sor_edp_enable(struct drm_encoder *encoder) err);
rate = drm_dp_link_rate_to_bw_code(link.rate); - lanes = link.num_lanes; + lanes = link.lanes;
value = tegra_sor_readl(sor, SOR_CLK_CNTRL); value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK; @@ -1470,8 +1470,7 @@ static void tegra_sor_edp_enable(struct drm_encoder *encoder) tegra_sor_writel(sor, value, SOR_DP_LINKCTL0);
/* disable training pattern generator */ - - for (i = 0; i < link.num_lanes; i++) { + for (i = 0; i < link.lanes; i++) { unsigned long lane = SOR_DP_TPG_CHANNEL_CODING | SOR_DP_TPG_SCRAMBLER_GALIOS | SOR_DP_TPG_PATTERN_NONE; diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index bb9d0deca07c..124fea3ffd57 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -757,9 +757,12 @@ int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,
struct drm_dp_link { unsigned char revision; - unsigned int rate; - unsigned int num_lanes; + unsigned int max_rate; + unsigned int max_lanes; unsigned long capabilities; + + unsigned int rate; + unsigned int lanes; };
int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link);