diff options
| author | Dom Cobley <popcornmix@gmail.com> | 2022-10-27 14:52:46 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2022-10-28 13:03:20 +0200 |
| commit | f09e172da85854d71284638d8ca25f0b3a980cb6 (patch) | |
| tree | 26f3df569c6f922d5daff04ad36d7ab8e68fdb7e | |
| parent | 2a001ca00ad55fd9e0fc96d84f57b894a4c34388 (diff) | |
| download | linux-f09e172da85854d71284638d8ca25f0b3a980cb6.tar.bz2 | |
drm/vc4: hdmi: Add more checks for 4k resolutions
At least the 4096x2160@60Hz mode requires some overclocking that isn't
available by default, even if hdmi_enable_4kp60 is enabled.
Let's add some logic to detect whether we can satisfy the core clock
requirements for that mode, and prevent it from being used otherwise.
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://lore.kernel.org/r/20220815-rpi-fix-4k-60-v5-6-fe9e7ac8b111@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_drv.h | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hdmi.c | 11 | ||||
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hvs.c | 3 |
3 files changed, 18 insertions, 2 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h index 8da2b80fdbd3..515228682e8e 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -347,6 +347,12 @@ struct vc4_hvs { * available. */ bool vc5_hdmi_enable_hdmi_20; + + /* + * 4096x2160@60 requires a core overclock to work, so register + * whether that is sufficient. + */ + bool vc5_hdmi_enable_4096by2160; }; struct vc4_plane { diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 3114735df5ae..4a73fafca51b 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1753,6 +1753,7 @@ vc4_hdmi_sink_supports_format_bpc(const struct vc4_hdmi *vc4_hdmi, static enum drm_mode_status vc4_hdmi_encoder_clock_valid(const struct vc4_hdmi *vc4_hdmi, + const struct drm_display_mode *mode, unsigned long long clock) { const struct drm_connector *connector = &vc4_hdmi->connector; @@ -1765,6 +1766,12 @@ vc4_hdmi_encoder_clock_valid(const struct vc4_hdmi *vc4_hdmi, if (!vc4->hvs->vc5_hdmi_enable_hdmi_20 && clock > HDMI_14_MAX_TMDS_CLK) return MODE_CLOCK_HIGH; + /* 4096x2160@60 is not reliable without overclocking core */ + if (!vc4->hvs->vc5_hdmi_enable_4096by2160 && + mode->hdisplay > 3840 && mode->vdisplay >= 2160 && + drm_mode_vrefresh(mode) >= 50) + return MODE_CLOCK_HIGH; + if (info->max_tmds_clock && clock > (info->max_tmds_clock * 1000)) return MODE_CLOCK_HIGH; @@ -1799,7 +1806,7 @@ vc4_hdmi_encoder_compute_clock(const struct vc4_hdmi *vc4_hdmi, unsigned long long clock; clock = vc4_hdmi_encoder_compute_mode_clock(mode, bpc, fmt); - if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, clock) != MODE_OK) + if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, mode, clock) != MODE_OK) return -EINVAL; vc4_state->tmds_char_rate = clock; @@ -1962,7 +1969,7 @@ vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder, (mode->hsync_end % 2) || (mode->htotal % 2))) return MODE_H_ILLEGAL; - return vc4_hdmi_encoder_clock_valid(vc4_hdmi, mode->clock * 1000); + return vc4_hdmi_encoder_clock_valid(vc4_hdmi, mode, mode->clock * 1000); } static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = { diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c index fc4b7310bf63..c4453a5ae163 100644 --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -818,6 +818,9 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) if (max_rate >= 550000000) hvs->vc5_hdmi_enable_hdmi_20 = true; + if (max_rate >= 600000000) + hvs->vc5_hdmi_enable_4096by2160 = true; + hvs->max_core_rate = max_rate; ret = clk_prepare_enable(hvs->core_clk); |