From: Baihan Li <libaihan@xxxxxxxxxx>
This is a DP IP controller's feature. It can be used as a debug method
which can check DP controller is working good. The colorbar displaying
doesn't rely on other IPs work in the chip, like: GPU or DDR (vram) and
so on, because colorbar diplaying data is generated by controller itself
inside the DP IP.
Signed-off-by: Baihan Li <libaihan@xxxxxxxxxx>
Signed-off-by: Yongbang Shi <shiyongbang@xxxxxxxxxx>
---
ChangeLog:
v1 -> v2:
- add colorbar introduction in commit, suggested by Dmitry Baryshkov.
- splittting colorbar and debugfs in different patches, suggested by Dmitry Baryshkov.
---
drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c | 43 +++++++++++++++++++++
drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h | 29 ++++++++++++++
drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h | 2 +
3 files changed, 74 insertions(+)
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
index 77f02d5151f7..8adace0befde 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
@@ -226,3 +226,46 @@ int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode)
return 0;
}
+
+static const struct hibmc_dp_color_raw g_rgb_raw[] = {
+ {CBAR_COLOR_BAR, 0x000, 0x000, 0x000},
+ {CBAR_WHITE, 0xfff, 0xfff, 0xfff},
+ {CBAR_RED, 0xfff, 0x000, 0x000},
+ {CBAR_ORANGE, 0xfff, 0x800, 0x000},
+ {CBAR_YELLOW, 0xfff, 0xfff, 0x000},
+ {CBAR_GREEN, 0x000, 0xfff, 0x000},
+ {CBAR_CYAN, 0x000, 0x800, 0x800},
+ {CBAR_BLUE, 0x000, 0x000, 0xfff},
+ {CBAR_PURPLE, 0x800, 0x000, 0x800},
+ {CBAR_BLACK, 0x000, 0x000, 0x000},
+};
+
+void hibmc_dp_set_cbar(struct hibmc_dp *dp, const struct hibmc_dp_cbar_cfg *cfg)
+{
+ struct hibmc_dp_dev *dp_dev = dp->dp_dev;
+ struct hibmc_dp_color_raw raw_data;
+
+ if (cfg->enable) {
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(9),
+ cfg->self_timing);
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, GENMASK(8, 1),
+ cfg->dynamic_rate);
+ if (cfg->pattern == CBAR_COLOR_BAR) {
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(10), 0);
+ } else {
+ raw_data = g_rgb_raw[cfg->pattern];
+ drm_dbg_dp(dp->drm_dev, "r:%x g:%x b:%x\n", raw_data.r_value,
+ raw_data.g_value, raw_data.b_value);
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(10), 1);
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, GENMASK(23, 12),
+ raw_data.r_value);
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL1, GENMASK(23, 12),
+ raw_data.g_value);
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL1, GENMASK(11, 0),
+ raw_data.b_value);
+ }
+ }
+
+ hibmc_dp_reg_write_field(dp_dev, HIBMC_DP_COLOR_BAR_CTRL, BIT(0), cfg->enable);
+ writel(HIBMC_DP_SYNC_EN_MASK, dp_dev->base + HIBMC_DP_TIMING_SYNC_CTRL);
+}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
index 53b6d0beecea..621a0a1d7eb7 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
@@ -14,6 +14,33 @@
struct hibmc_dp_dev;
+enum hibmc_dp_cbar_pattern {
+ CBAR_COLOR_BAR,
+ CBAR_WHITE,
+ CBAR_RED,
+ CBAR_ORANGE,
+ CBAR_YELLOW,
+ CBAR_GREEN,
+ CBAR_CYAN,
+ CBAR_BLUE,
+ CBAR_PURPLE,
+ CBAR_BLACK,
+};
+
+struct hibmc_dp_color_raw {
+ enum hibmc_dp_cbar_pattern pattern;
+ u32 r_value;
+ u32 g_value;
+ u32 b_value;
+};
+
+struct hibmc_dp_cbar_cfg {
+ bool enable;
+ bool self_timing;
+ u8 dynamic_rate; /* 0:static, 1-255(frame):dynamic */
+ enum hibmc_dp_cbar_pattern pattern;
+};
+
struct hibmc_dp {
struct hibmc_dp_dev *dp_dev;
struct drm_device *drm_dev;
@@ -21,10 +48,12 @@ struct hibmc_dp {
struct drm_connector connector;
void __iomem *mmio;
struct drm_dp_aux aux;
+ struct hibmc_dp_cbar_cfg cfg;
};
int hibmc_dp_hw_init(struct hibmc_dp *dp);
int hibmc_dp_mode_set(struct hibmc_dp *dp, struct drm_display_mode *mode);
void hibmc_dp_display_en(struct hibmc_dp *dp, bool enable);
+void hibmc_dp_set_cbar(struct hibmc_dp *dp, const struct hibmc_dp_cbar_cfg *cfg);
#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
index f2fa9807d8ab..c43ad6b30c2c 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
@@ -23,6 +23,8 @@
#define HIBMC_DP_VIDEO_MSA1 0x11c
#define HIBMC_DP_VIDEO_MSA2 0x120
#define HIBMC_DP_VIDEO_HORIZONTAL_SIZE 0X124
+#define HIBMC_DP_COLOR_BAR_CTRL 0x260
+#define HIBMC_DP_COLOR_BAR_CTRL1 0x264
#define HIBMC_DP_TIMING_GEN_CONFIG0 0x26c
#define HIBMC_DP_TIMING_GEN_CONFIG2 0x274
#define HIBMC_DP_TIMING_GEN_CONFIG3 0x278
--
2.33.0
