From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: dri-devel@lists.freedesktop.org, linux-amlogic@lists.infradead.org
Cc: neil.armstrong@linaro.org,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH RFC v2 1/2] Revert "drm/meson: vclk: fix calculation of 59.94 fractional rates"
Date: Mon, 21 Apr 2025 22:12:59 +0200 [thread overview]
Message-ID: <20250421201300.778955-2-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20250421201300.778955-1-martin.blumenstingl@googlemail.com>
From: Christian Hewitt <christianshewitt@gmail.com>
This reverts commit bfbc68e.
The patch does permit the offending YUV420 @ 59.94 phy_freq and
vclk_freq mode to match in calculations. It also results in all
fractional rates being unavailable for use. This was unintended
and requires the patch to be reverted.
Fixes: bfbc68e4d869 ("drm/meson: vclk: fix calculation of 59.94 fractional rates")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/gpu/drm/meson/meson_vclk.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/meson/meson_vclk.c b/drivers/gpu/drm/meson/meson_vclk.c
index 2a942dc6a6dc..2a82119eb58e 100644
--- a/drivers/gpu/drm/meson/meson_vclk.c
+++ b/drivers/gpu/drm/meson/meson_vclk.c
@@ -790,13 +790,13 @@ meson_vclk_vic_supported_freq(struct meson_drm *priv, unsigned int phy_freq,
FREQ_1000_1001(params[i].pixel_freq));
DRM_DEBUG_DRIVER("i = %d phy_freq = %d alt = %d\n",
i, params[i].phy_freq,
- FREQ_1000_1001(params[i].phy_freq/1000)*1000);
+ FREQ_1000_1001(params[i].phy_freq/10)*10);
/* Match strict frequency */
if (phy_freq == params[i].phy_freq &&
vclk_freq == params[i].vclk_freq)
return MODE_OK;
/* Match 1000/1001 variant */
- if (phy_freq == (FREQ_1000_1001(params[i].phy_freq/1000)*1000) &&
+ if (phy_freq == (FREQ_1000_1001(params[i].phy_freq/10)*10) &&
vclk_freq == FREQ_1000_1001(params[i].vclk_freq))
return MODE_OK;
}
@@ -1070,7 +1070,7 @@ void meson_vclk_setup(struct meson_drm *priv, unsigned int target,
for (freq = 0 ; params[freq].pixel_freq ; ++freq) {
if ((phy_freq == params[freq].phy_freq ||
- phy_freq == FREQ_1000_1001(params[freq].phy_freq/1000)*1000) &&
+ phy_freq == FREQ_1000_1001(params[freq].phy_freq/10)*10) &&
(vclk_freq == params[freq].vclk_freq ||
vclk_freq == FREQ_1000_1001(params[freq].vclk_freq))) {
if (vclk_freq != params[freq].vclk_freq)
--
2.49.0
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next prev parent reply other threads:[~2025-04-21 20:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-21 20:12 [PATCH RFC v2 0/2] drm/meson: vclk: revert and re-fix vclk calculations Martin Blumenstingl
2025-04-21 20:12 ` Martin Blumenstingl [this message]
2025-04-21 20:13 ` [PATCH RFC v2 2/2] drm/meson: use unsigned long long / Hz for frequency types Martin Blumenstingl
2025-04-22 7:03 ` [PATCH RFC v2 0/2] drm/meson: vclk: revert and re-fix vclk calculations neil.armstrong
2025-04-22 7:32 ` Neil Armstrong
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