From: Neil Armstrong narmstrong@baylibre.com
The dw-hdmi integrates an optional Color Space Conversion feature used to handle color-space conversions.
On some platforms, the CSC isn't built-in or non-functional.
This adds the necessary code to disable the CSC functionality and limit the bus format negotiation to force using the same input bus format as the output bus format.
Signed-off-by: Neil Armstrong narmstrong@baylibre.com Signed-off-by: H. Nikolaus Schaller hns@goldelico.com --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 100 +++++++++++++++------- drivers/gpu/drm/bridge/synopsys/dw-hdmi.h | 1 + include/drm/bridge/dw_hdmi.h | 1 + 3 files changed, 71 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index f50af40e10340..b5a665c5e406e 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -158,6 +158,8 @@ struct dw_hdmi { struct hdmi_data_info hdmi_data; const struct dw_hdmi_plat_data *plat_data;
+ bool csc_available; /* indicates if the CSC engine is usable */ + int vic;
u8 edid[HDMI_EDID_LEN]; @@ -1009,9 +1011,10 @@ static int is_color_space_interpolation(struct dw_hdmi *hdmi)
static bool is_csc_needed(struct dw_hdmi *hdmi) { - return is_color_space_conversion(hdmi) || - is_color_space_decimation(hdmi) || - is_color_space_interpolation(hdmi); + return hdmi->csc_available && + (is_color_space_conversion(hdmi) || + is_color_space_decimation(hdmi) || + is_color_space_interpolation(hdmi)); }
static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi) @@ -1064,6 +1067,9 @@ static void hdmi_video_csc(struct dw_hdmi *hdmi) int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE; int decimation = 0;
+ if (!hdmi->csc_available) + return; + /* YCC422 interpolation to 444 mode */ if (is_color_space_interpolation(hdmi)) interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1; @@ -2665,6 +2671,7 @@ static u32 *dw_hdmi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, u32 output_fmt, unsigned int *num_input_fmts) { + struct dw_hdmi *hdmi = bridge->driver_private; u32 *input_fmts; unsigned int i = 0;
@@ -2683,62 +2690,81 @@ static u32 *dw_hdmi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, /* 8bit */ case MEDIA_BUS_FMT_RGB888_1X24: input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; - input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; - input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; + input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; + } break; case MEDIA_BUS_FMT_YUV8_1X24: input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; - input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; - input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; + input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; + } break; case MEDIA_BUS_FMT_UYVY8_1X16: input_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16; - input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; - input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24; + input_fmts[i++] = MEDIA_BUS_FMT_RGB888_1X24; + } break;
/* 10bit */ case MEDIA_BUS_FMT_RGB101010_1X30: input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; - input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; - input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; + input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; + } break; case MEDIA_BUS_FMT_YUV10_1X30: input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; - input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; - input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; + input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; + } break; case MEDIA_BUS_FMT_UYVY10_1X20: input_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20; - input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; - input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30; + input_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30; + } break;
/* 12bit */ case MEDIA_BUS_FMT_RGB121212_1X36: input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; - input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; - input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; + input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; + } break; case MEDIA_BUS_FMT_YUV12_1X36: input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; - input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; - input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; + input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; + } break; case MEDIA_BUS_FMT_UYVY12_1X24: input_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24; - input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; - input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; + if (hdmi->csc_available) { + input_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36; + input_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36; + } break;
/* 16bit */ case MEDIA_BUS_FMT_RGB161616_1X48: input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48; - input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; + if (hdmi->csc_available) + input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; break; case MEDIA_BUS_FMT_YUV16_1X48: - input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; - input_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48; + if (hdmi->csc_available) + input_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48; break;
/*YUV 4:2:0 */ @@ -2767,15 +2793,24 @@ static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge, { struct dw_hdmi *hdmi = bridge->driver_private;
- hdmi->hdmi_data.enc_out_bus_format = - bridge_state->output_bus_cfg.format; + if (!hdmi->csc_available && + bridge_state->output_bus_cfg.format != bridge_state->input_bus_cfg.format) { + dev_warn(hdmi->dev, "different input format 0x%04x & output format 0x%04x while CSC isn't usable, fallback to safe format\n", + bridge_state->input_bus_cfg.format, + bridge_state->output_bus_cfg.format); + hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_FIXED; + hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_FIXED; + } else { + hdmi->hdmi_data.enc_out_bus_format = + bridge_state->output_bus_cfg.format;
- hdmi->hdmi_data.enc_in_bus_format = - bridge_state->input_bus_cfg.format; + hdmi->hdmi_data.enc_in_bus_format = + bridge_state->input_bus_cfg.format;
- dev_dbg(hdmi->dev, "input format 0x%04x, output format 0x%04x\n", - bridge_state->input_bus_cfg.format, - bridge_state->output_bus_cfg.format); + dev_dbg(hdmi->dev, "input format 0x%04x, output format 0x%04x\n", + bridge_state->input_bus_cfg.format, + bridge_state->output_bus_cfg.format); + }
return 0; } @@ -3481,6 +3516,9 @@ struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev, hdmi->cec = platform_device_register_full(&pdevinfo); }
+ /* Get CSC useability from config0 register and permit override for platforms */ + hdmi->csc_available = !plat_data->disable_csc || (config0 & HDMI_CONFIG0_CSC); + drm_bridge_add(&hdmi->bridge);
return hdmi; diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h index 1999db05bc3b2..279722e4d1898 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h @@ -541,6 +541,7 @@ enum {
/* CONFIG0_ID field values */ HDMI_CONFIG0_I2S = 0x10, + HDMI_CONFIG0_CSC = 0x04, HDMI_CONFIG0_CEC = 0x02,
/* CONFIG1_ID field values */ diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h index 2a1f85f9a8a3f..b2f689cbe864c 100644 --- a/include/drm/bridge/dw_hdmi.h +++ b/include/drm/bridge/dw_hdmi.h @@ -157,6 +157,7 @@ struct dw_hdmi_plat_data { unsigned long mpixelclock);
unsigned int disable_cec : 1; + unsigned int disable_csc : 1; };
struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,