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drm/rockchip: dw-hdmi: filter color format which is no support

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there are maximum TMDS clock limit, when the clock is out of range
reducing frequency by set color format to yuv420 and/or set color
depth to 8bit

Change-Id: I8b79de97329561bf0399d05c0264a5c818f844fc
Signed-off-by: xuhuicong <xhc@rock-chips.com>
This commit is contained in:
xuhuicong
2018-01-13 19:40:24 +08:00
committed by Tao Huang
parent 99b329a400
commit ae6fbdeed9
1 changed files with 14 additions and 6 deletions
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20
drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
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@@ -102,7 +102,7 @@ struct rockchip_hdmi {
struct dw_hdmi *hdmi;
struct phy *phy;
u32 max_tmdsclk;
int max_tmdsclk;
bool unsupported_yuv_input;
bool unsupported_deep_color;
@@ -495,7 +495,7 @@ dw_hdmi_rockchip_select_output(struct drm_connector_state *conn_state,
u32 vic = drm_match_cea_mode(mode);
unsigned long tmdsclock, pixclock = mode->crtc_clock;
bool support_dc = false;
u32 max_tmds_clock = info->max_tmds_clock;
int max_tmds_clock = info->max_tmds_clock;
*color_format = DRM_HDMI_OUTPUT_DEFAULT_RGB;
@@ -598,11 +598,19 @@ dw_hdmi_rockchip_select_output(struct drm_connector_state *conn_state,
if (!max_tmds_clock)
max_tmds_clock = 340000;
max_tmds_clock = min(max_tmds_clock, hdmi->max_tmdsclk);
if (tmdsclock > max_tmds_clock) {
*color_depth = 8;
if (tmdsclock > 340000 && drm_mode_is_420(info, mode) &&
(max_tmds_clock <= 340000 || hdmi->max_tmdsclk <= 340000))
*color_format = DRM_HDMI_OUTPUT_YCBCR420;
if (max_tmds_clock >= 594000) {
*color_depth = 8;
} else if (max_tmds_clock > 340000) {
if (drm_mode_is_420(info, mode))
*color_format = DRM_HDMI_OUTPUT_YCBCR420;
} else {
*color_depth = 8;
if (drm_mode_is_420(info, mode))
*color_format = DRM_HDMI_OUTPUT_YCBCR420;
}
}
}