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drm/meson: vclk: use the correct G12A frac max value

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[ Upstream commit d56276a13c ]

When calculating the HDMI PLL settings for a DMT mode PHY frequency,
use the correct max fractional PLL value for G12A VPU.

With this fix, we can finally setup the 1024x768-60 mode.

Fixes: 202b9808f8 ("drm/meson: Add G12A Video Clock setup")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190828132311.23881-1-narmstrong@baylibre.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Neil Armstrong
2019-08-28 15:23:11 +02:00
committed by Greg Kroah-Hartman
parent a3a547e8df
commit f2331974af
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/meson/meson_vclk.c
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@@ -638,13 +638,18 @@ static bool meson_hdmi_pll_validate_params(struct meson_drm *priv,
if (frac >= HDMI_FRAC_MAX_GXBB)
return false;
} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL) ||
meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL)) {
/* Empiric supported min/max dividers */
if (m < 106 || m > 247)
return false;
if (frac >= HDMI_FRAC_MAX_GXL)
return false;
} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
/* Empiric supported min/max dividers */
if (m < 106 || m > 247)
return false;
if (frac >= HDMI_FRAC_MAX_G12A)
return false;
}
return true;