diff options
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_panel.c')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_panel.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 127f6af995..8e70694539 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -4,11 +4,16 @@ */ #include "dp_panel.h" +#include "dp_utils.h" #include <drm/drm_connector.h> #include <drm/drm_edid.h> +#include <drm/drm_of.h> #include <drm/drm_print.h> +#define DP_MAX_NUM_DP_LANES 4 +#define DP_LINK_RATE_HBR2 540000 /* kbytes */ + struct dp_panel_private { struct device *dev; struct drm_device *drm_dev; @@ -53,6 +58,7 @@ static int dp_panel_read_dpcd(struct dp_panel *dp_panel) if (rc) return rc; + dp_panel->vsc_sdp_supported = drm_dp_vsc_sdp_supported(panel->aux, dpcd); link_info = &dp_panel->link_info; link_info->revision = dpcd[DP_DPCD_REV]; major = (link_info->revision >> 4) & 0x0f; @@ -138,6 +144,9 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel, panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + drm_dbg_dp(panel->drm_dev, "max_lanes=%d max_link_rate=%d\n", + dp_panel->max_dp_lanes, dp_panel->max_dp_link_rate); + rc = dp_panel_read_dpcd(dp_panel); if (rc) { DRM_ERROR("read dpcd failed %d\n", rc); @@ -280,6 +289,53 @@ void dp_panel_tpg_config(struct dp_panel *dp_panel, bool enable) dp_catalog_panel_tpg_enable(catalog, &panel->dp_panel.dp_mode.drm_mode); } +static int dp_panel_setup_vsc_sdp_yuv_420(struct dp_panel *dp_panel) +{ + struct dp_catalog *catalog; + struct dp_panel_private *panel; + struct dp_display_mode *dp_mode; + struct drm_dp_vsc_sdp vsc_sdp_data; + struct dp_sdp vsc_sdp; + ssize_t len; + + if (!dp_panel) { + DRM_ERROR("invalid input\n"); + return -EINVAL; + } + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + catalog = panel->catalog; + dp_mode = &dp_panel->dp_mode; + + memset(&vsc_sdp_data, 0, sizeof(vsc_sdp_data)); + + /* VSC SDP header as per table 2-118 of DP 1.4 specification */ + vsc_sdp_data.sdp_type = DP_SDP_VSC; + vsc_sdp_data.revision = 0x05; + vsc_sdp_data.length = 0x13; + + /* VSC SDP Payload for DB16 */ + vsc_sdp_data.pixelformat = DP_PIXELFORMAT_YUV420; + vsc_sdp_data.colorimetry = DP_COLORIMETRY_DEFAULT; + + /* VSC SDP Payload for DB17 */ + vsc_sdp_data.bpc = dp_mode->bpp / 3; + vsc_sdp_data.dynamic_range = DP_DYNAMIC_RANGE_CTA; + + /* VSC SDP Payload for DB18 */ + vsc_sdp_data.content_type = DP_CONTENT_TYPE_GRAPHICS; + + len = drm_dp_vsc_sdp_pack(&vsc_sdp_data, &vsc_sdp); + if (len < 0) { + DRM_ERROR("unable to pack vsc sdp\n"); + return len; + } + + dp_catalog_panel_enable_vsc_sdp(catalog, &vsc_sdp); + + return 0; +} + void dp_panel_dump_regs(struct dp_panel *dp_panel) { struct dp_catalog *catalog; @@ -343,6 +399,10 @@ int dp_panel_timing_cfg(struct dp_panel *dp_panel) catalog->dp_active = data; dp_catalog_panel_timing_cfg(catalog); + + if (dp_panel->dp_mode.out_fmt_is_yuv_420) + dp_panel_setup_vsc_sdp_yuv_420(dp_panel); + panel->panel_on = true; return 0; @@ -386,10 +446,65 @@ int dp_panel_init_panel_info(struct dp_panel *dp_panel) return 0; } +static u32 dp_panel_link_frequencies(struct device_node *of_node) +{ + struct device_node *endpoint; + u64 frequency = 0; + int cnt; + + endpoint = of_graph_get_endpoint_by_regs(of_node, 1, 0); /* port@1 */ + if (!endpoint) + return 0; + + cnt = of_property_count_u64_elems(endpoint, "link-frequencies"); + + if (cnt > 0) + of_property_read_u64_index(endpoint, "link-frequencies", + cnt - 1, &frequency); + of_node_put(endpoint); + + do_div(frequency, + 10 * /* from symbol rate to link rate */ + 1000); /* kbytes */ + + return frequency; +} + +static int dp_panel_parse_dt(struct dp_panel *dp_panel) +{ + struct dp_panel_private *panel; + struct device_node *of_node; + int cnt; + + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); + of_node = panel->dev->of_node; + + /* + * data-lanes is the property of dp_out endpoint + */ + cnt = drm_of_get_data_lanes_count_ep(of_node, 1, 0, 1, DP_MAX_NUM_DP_LANES); + if (cnt < 0) { + /* legacy code, data-lanes is the property of mdss_dp node */ + cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES); + } + + if (cnt > 0) + dp_panel->max_dp_lanes = cnt; + else + dp_panel->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */ + + dp_panel->max_dp_link_rate = dp_panel_link_frequencies(of_node); + if (!dp_panel->max_dp_link_rate) + dp_panel->max_dp_link_rate = DP_LINK_RATE_HBR2; + + return 0; +} + struct dp_panel *dp_panel_get(struct dp_panel_in *in) { struct dp_panel_private *panel; struct dp_panel *dp_panel; + int ret; if (!in->dev || !in->catalog || !in->aux || !in->link) { DRM_ERROR("invalid input\n"); @@ -408,6 +523,10 @@ struct dp_panel *dp_panel_get(struct dp_panel_in *in) dp_panel = &panel->dp_panel; dp_panel->max_bw_code = DP_LINK_BW_8_1; + ret = dp_panel_parse_dt(dp_panel); + if (ret) + return ERR_PTR(ret); + return dp_panel; } |