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From: Frank Oltmanns <frank@oltmanns.dev>
To: "Michael Turquette" <mturquette@baylibre.com>,
	"Stephen Boyd" <sboyd@kernel.org>, "Chen-Yu Tsai" <wens@csie.org>,
	"Jernej Skrabec" <jernej.skrabec@gmail.com>,
	"Samuel Holland" <samuel@sholland.org>,
	"Guido Günther" <agx@sigxcpu.org>,
	"Purism Kernel Team" <kernel@puri.sm>,
	"Ondrej Jirman" <megi@xff.cz>,
	"Neil Armstrong" <neil.armstrong@linaro.org>,
	"Jessica Zhang" <quic_jesszhan@quicinc.com>,
	"Sam Ravnborg" <sam@ravnborg.org>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"David Airlie" <airlied@gmail.com>,
	"Daniel Vetter" <daniel@ffwll.ch>
Cc: linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	 linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org,
	 dri-devel@lists.freedesktop.org,
	Frank Oltmanns <frank@oltmanns.dev>
Subject: [PATCH 5/5] drm/panel: st7703: Drive XBD599 panel at higher clock rate
Date: Mon, 18 Dec 2023 14:35:23 +0100	[thread overview]
Message-ID: <20231218-pinephone-pll-fixes-v1-5-e238b6ed6dc1@oltmanns.dev> (raw)
In-Reply-To: <20231218-pinephone-pll-fixes-v1-0-e238b6ed6dc1@oltmanns.dev>

This panel is used in the pinephone that runs on a Allwinner A64 SOC.
Acoording to it's datasheet, the SOC requires PLL-MIPI to run at more
than 500 MHz.

Therefore, change [hv]sync_(start|end) so that we reach a clock rate
that is high enough to drive PLL-MIPI within its limits.

Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>
---
 drivers/gpu/drm/panel/panel-sitronix-st7703.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
index b55bafd1a8be..6886fd7f765e 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
@@ -320,14 +320,14 @@ static int xbd599_init_sequence(struct st7703 *ctx)
 
 static const struct drm_display_mode xbd599_mode = {
 	.hdisplay    = 720,
-	.hsync_start = 720 + 40,
-	.hsync_end   = 720 + 40 + 40,
-	.htotal	     = 720 + 40 + 40 + 40,
+	.hsync_start = 720 + 65,
+	.hsync_end   = 720 + 65 + 65,
+	.htotal      = 720 + 65 + 65 + 65,
 	.vdisplay    = 1440,
-	.vsync_start = 1440 + 18,
-	.vsync_end   = 1440 + 18 + 10,
-	.vtotal	     = 1440 + 18 + 10 + 17,
-	.clock	     = 69000,
+	.vsync_start = 1440 + 30,
+	.vsync_end   = 1440 + 30 + 22,
+	.vtotal	     = 1440 + 30 + 22 + 29,
+	.clock	     = (720 + 65 + 65 + 65) * (1440 + 30 + 22 + 29) * 60 / 1000,
 	.flags	     = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
 	.width_mm    = 68,
 	.height_mm   = 136,

-- 
2.43.0


  parent reply	other threads:[~2023-12-18 13:36 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-18 13:35 [PATCH 0/5] Pinephone video out fixes (flipping between two frames) Frank Oltmanns
2023-12-18 13:35 ` [PATCH 1/5] clk: sunxi-ng: nkm: Support constraints on m/n ratio and parent rate Frank Oltmanns
2023-12-18 17:26   ` Frank Oltmanns
2023-12-19 16:46   ` Jernej Škrabec
2023-12-20  6:58     ` Frank Oltmanns
2023-12-20 15:09       ` Jernej Škrabec
2023-12-18 13:35 ` [PATCH 2/5] clk: sunxi-ng: a64: Add constraints on PLL-MIPI's n/m " Frank Oltmanns
2023-12-19 16:46   ` Jernej Škrabec
2023-12-18 13:35 ` [PATCH 3/5] clk: sunxi-ng: nm: Support constraints on " Frank Oltmanns
2023-12-19 16:52   ` Jernej Škrabec
2023-12-18 13:35 ` [PATCH 4/5] clk: sunxi-ng: a64: Add constraints on PLL-VIDEO0's n/m ratio Frank Oltmanns
2023-12-19 16:54   ` Jernej Škrabec
2023-12-20  7:09     ` Frank Oltmanns
2023-12-20 15:12       ` Jernej Škrabec
2023-12-22  7:46         ` Frank Oltmanns
2023-12-31  9:10     ` Frank Oltmanns
2024-01-09 20:29       ` Jernej Škrabec
2023-12-18 13:35 ` Frank Oltmanns [this message]
2023-12-19 17:04   ` [PATCH 5/5] drm/panel: st7703: Drive XBD599 panel at higher clock rate Jernej Škrabec
2023-12-20  7:14     ` Frank Oltmanns
2023-12-20 15:18       ` Jernej Škrabec
2023-12-20 18:57         ` Frank Oltmanns
2023-12-22  9:10           ` Frank Oltmanns
2023-12-22 17:36             ` Jernej Škrabec
2023-12-30 21:17         ` Frank Oltmanns

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