In order to support the HDMI2.0 YUV420 display modes, this patch adds support for the YUV420 TMDS Clock divided by 2 and the controller passthrough mode.
YUV420 Synopsys PHY support will need some specific configuration table to support theses modes.
This patch is based on work from Zheng Yang zhengyang@rock-chips.com in the Rockchip Linux 4.4 BSP at [1]
[1] https://github.com/rockchip-linux/kernel/tree/release-4.4
Cc: Zheng Yang zhengyang@rock-chips.com Signed-off-by: Neil Armstrong narmstrong@baylibre.com Tested-by: Heiko Stuebner heiko@sntech.de Reviewed-by: Andrzej Hajda a.hajda@samsung.com --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 68 ++++++++++++++++++----- 1 file changed, 54 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index fcd941d52753..4a9a24e854db 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -99,6 +99,7 @@ struct hdmi_vmode { unsigned int mpixelclock; unsigned int mpixelrepetitioninput; unsigned int mpixelrepetitionoutput; + unsigned int mtmdsclock; };
struct hdmi_data_info { @@ -543,7 +544,7 @@ static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi) static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi) { mutex_lock(&hdmi->audio_mutex); - hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock, + hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock, hdmi->sample_rate); mutex_unlock(&hdmi->audio_mutex); } @@ -552,7 +553,7 @@ void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate) { mutex_lock(&hdmi->audio_mutex); hdmi->sample_rate = rate; - hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock, + hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mtmdsclock, hdmi->sample_rate); mutex_unlock(&hdmi->audio_mutex); } @@ -653,6 +654,20 @@ static bool hdmi_bus_fmt_is_yuv422(unsigned int bus_format) } }
+static bool hdmi_bus_fmt_is_yuv420(unsigned int bus_format) +{ + switch (bus_format) { + case MEDIA_BUS_FMT_UYYVYY8_0_5X24: + case MEDIA_BUS_FMT_UYYVYY10_0_5X30: + case MEDIA_BUS_FMT_UYYVYY12_0_5X36: + case MEDIA_BUS_FMT_UYYVYY16_0_5X48: + return true; + + default: + return false; + } +} + static int hdmi_bus_fmt_color_depth(unsigned int bus_format) { switch (bus_format) { @@ -882,7 +897,8 @@ static void hdmi_video_packetize(struct dw_hdmi *hdmi) u8 val, vp_conf;
if (hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format) || - hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format)) { + hdmi_bus_fmt_is_yuv444(hdmi->hdmi_data.enc_out_bus_format) || + hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) { switch (hdmi_bus_fmt_color_depth( hdmi->hdmi_data.enc_out_bus_format)) { case 8: @@ -1036,7 +1052,7 @@ EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_write); */ void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi) { - unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mpixelclock; + unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock;
/* Control for TMDS Bit Period/TMDS Clock-Period Ratio */ if (hdmi->connector.display_info.hdmi.scdc.supported) { @@ -1198,6 +1214,8 @@ static int hdmi_phy_configure_dwc_hdmi_3d_tx(struct dw_hdmi *hdmi, const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr; const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
+ /* TOFIX Will need 420 specific PHY configuration tables */ + /* PLL/MPLL Cfg - always match on final entry */ for (; mpll_config->mpixelclock != ~0UL; mpll_config++) if (mpixelclock <= mpll_config->mpixelclock) @@ -1245,6 +1263,7 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi) const struct dw_hdmi_phy_data *phy = hdmi->phy.data; const struct dw_hdmi_plat_data *pdata = hdmi->plat_data; unsigned long mpixelclock = hdmi->hdmi_data.video_mode.mpixelclock; + unsigned long mtmdsclock = hdmi->hdmi_data.video_mode.mtmdsclock; int ret;
dw_hdmi_phy_power_off(hdmi); @@ -1273,7 +1292,7 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi) }
/* Wait for resuming transmission of TMDS clock and data */ - if (mpixelclock > HDMI14_MAX_TMDSCLK) + if (mtmdsclock > HDMI14_MAX_TMDSCLK) msleep(100);
return dw_hdmi_phy_power_on(hdmi); @@ -1383,6 +1402,9 @@ static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode) struct hdmi_avi_infoframe frame; u8 val;
+ if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) + is_hdmi2_sink = true; + /* Initialise info frame from DRM mode */ drm_hdmi_avi_infoframe_from_display_mode(&frame, mode, is_hdmi2_sink);
@@ -1390,6 +1412,8 @@ static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode) frame.colorspace = HDMI_COLORSPACE_YUV444; else if (hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) frame.colorspace = HDMI_COLORSPACE_YUV422; + else if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) + frame.colorspace = HDMI_COLORSPACE_YUV420; else frame.colorspace = HDMI_COLORSPACE_RGB;
@@ -1547,15 +1571,18 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, struct drm_hdmi_info *hdmi_info = &hdmi->connector.display_info.hdmi; struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode; int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len; - unsigned int vdisplay; + unsigned int vdisplay, hdisplay;
- vmode->mpixelclock = mode->clock * 1000; + vmode->mtmdsclock = vmode->mpixelclock = mode->clock * 1000;
dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
+ if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) + vmode->mtmdsclock /= 2; + /* Set up HDMI_FC_INVIDCONF */ inv_val = (hdmi->hdmi_data.hdcp_enable || - vmode->mpixelclock > HDMI14_MAX_TMDSCLK || + vmode->mtmdsclock > HDMI14_MAX_TMDSCLK || hdmi_info->scdc.scrambling.low_rates ? HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE : HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE); @@ -1589,6 +1616,22 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
+ hdisplay = mode->hdisplay; + hblank = mode->htotal - mode->hdisplay; + h_de_hs = mode->hsync_start - mode->hdisplay; + hsync_len = mode->hsync_end - mode->hsync_start; + + /* + * When we're setting a YCbCr420 mode, we need + * to adjust the horizontal timing to suit. + */ + if (hdmi_bus_fmt_is_yuv420(hdmi->hdmi_data.enc_out_bus_format)) { + hdisplay /= 2; + hblank /= 2; + h_de_hs /= 2; + hsync_len /= 2; + } + vdisplay = mode->vdisplay; vblank = mode->vtotal - mode->vdisplay; v_de_vs = mode->vsync_start - mode->vdisplay; @@ -1607,7 +1650,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
/* Scrambling Control */ if (hdmi_info->scdc.supported) { - if (vmode->mpixelclock > HDMI14_MAX_TMDSCLK || + if (vmode->mtmdsclock > HDMI14_MAX_TMDSCLK || hdmi_info->scdc.scrambling.low_rates) { /* * HDMI2.0 Specifies the following procedure: @@ -1645,15 +1688,14 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, }
/* Set up horizontal active pixel width */ - hdmi_writeb(hdmi, mode->hdisplay >> 8, HDMI_FC_INHACTV1); - hdmi_writeb(hdmi, mode->hdisplay, HDMI_FC_INHACTV0); + hdmi_writeb(hdmi, hdisplay >> 8, HDMI_FC_INHACTV1); + hdmi_writeb(hdmi, hdisplay, HDMI_FC_INHACTV0);
/* Set up vertical active lines */ hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1); hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0);
/* Set up horizontal blanking pixel region width */ - hblank = mode->htotal - mode->hdisplay; hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1); hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0);
@@ -1661,7 +1703,6 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK);
/* Set up HSYNC active edge delay width (in pixel clks) */ - h_de_hs = mode->hsync_start - mode->hdisplay; hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1); hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0);
@@ -1669,7 +1710,6 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY);
/* Set up HSYNC active pulse width (in pixel clks) */ - hsync_len = mode->hsync_end - mode->hsync_start; hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1); hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0);