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| author | Neil Armstrong <narmstrong@baylibre.com> | 2020-04-28 11:21:47 +0200 |
|---|---|---|
| committer | Neil Armstrong <narmstrong@baylibre.com> | 2020-05-05 10:19:33 +0200 |
| commit | 8976eeee8de05f11eb424882a57084880b677525 (patch) | |
| tree | 63a24393215556a222de6e3e09621c699b636187 /drivers/gpu/drm/meson/meson_vclk.c | |
| parent | e7f12054a1b9cbf6b4923427dec5eeb32f7ac388 (diff) | |
| download | lwn-8976eeee8de05f11eb424882a57084880b677525.tar.gz lwn-8976eeee8de05f11eb424882a57084880b677525.zip | |
drm/meson: add mode selection limits against specific SoC revisions
The Amlogic S805X/Y uses the same die as the S905X, but with more
limited graphics capabilities.
This adds a soc version detection adding specific limitations on the HDMI
mode selections.
Here, we limit to HDMI 1.2a max HDMI PHY clock frequency.
Changes sinces v1:
- Moved frequency check in the vclk code, and also checks DMT modes
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
[narmstrong: fixed commit message with HDMI 1.2a instead of HDMI 1.3a]
Link: https://patchwork.freedesktop.org/patch/msgid/20200428092147.13698-1-narmstrong@baylibre.com
Diffstat (limited to 'drivers/gpu/drm/meson/meson_vclk.c')
| -rw-r--r-- | drivers/gpu/drm/meson/meson_vclk.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/gpu/drm/meson/meson_vclk.c b/drivers/gpu/drm/meson/meson_vclk.c index fdf26dac9fa8..0eb86943a358 100644 --- a/drivers/gpu/drm/meson/meson_vclk.c +++ b/drivers/gpu/drm/meson/meson_vclk.c @@ -725,6 +725,13 @@ meson_vclk_dmt_supported_freq(struct meson_drm *priv, unsigned int freq) /* In DMT mode, path after PLL is always /10 */ freq *= 10; + /* Check against soc revision/package limits */ + if (priv->limits) { + if (priv->limits->max_hdmi_phy_freq && + freq > priv->limits->max_hdmi_phy_freq) + return MODE_CLOCK_HIGH; + } + if (meson_hdmi_pll_find_params(priv, freq, &m, &frac, &od)) return MODE_OK; @@ -762,7 +769,7 @@ static void meson_hdmi_pll_generic_set(struct meson_drm *priv, } enum drm_mode_status -meson_vclk_vic_supported_freq(unsigned int phy_freq, +meson_vclk_vic_supported_freq(struct meson_drm *priv, unsigned int phy_freq, unsigned int vclk_freq) { int i; @@ -770,6 +777,13 @@ meson_vclk_vic_supported_freq(unsigned int phy_freq, DRM_DEBUG_DRIVER("phy_freq = %d vclk_freq = %d\n", phy_freq, vclk_freq); + /* Check against soc revision/package limits */ + if (priv->limits) { + if (priv->limits->max_hdmi_phy_freq && + phy_freq > priv->limits->max_hdmi_phy_freq) + return MODE_CLOCK_HIGH; + } + for (i = 0 ; params[i].pixel_freq ; ++i) { DRM_DEBUG_DRIVER("i = %d pixel_freq = %d alt = %d\n", i, params[i].pixel_freq, |