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From: Thierry Reding <thierry.reding@gmail.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Neil Armstrong <neil.armstrong@linaro.org>,
	Sam Ravnborg <sam@ravnborg.org>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>
Cc: linux-tegra@vger.kernel.org, devicetree@vger.kernel.org,
	Svyatoslav Ryhel <clamor95@gmail.com>,
	dri-devel@lists.freedesktop.org,
	Jon Hunter <jonathanh@nvidia.com>
Subject: [PATCH 2/3] drm/panel: Relax porches for HannStar HSD101PWW2
Date: Wed, 26 Jul 2023 20:48:56 +0200	[thread overview]
Message-ID: <20230726184857.2294570-2-thierry.reding@gmail.com> (raw)
In-Reply-To: <20230726184857.2294570-1-thierry.reding@gmail.com>

From: Thierry Reding <treding@nvidia.com>

The porch maximum values for the HannStar HSD101PWW2 are unusually
small. Make them a bit larger to allow a more flexibility when
overriding the timings in device tree. Unfortunately the datasheet
doesn't list porch limits in detail, so this is a bit of guesswork.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/panel/panel-simple.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 4badda6570d5..4bab181e9d4b 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -2104,13 +2104,13 @@ static const struct panel_desc hannstar_hsd100pxn1 = {
 static const struct display_timing hannstar_hsd101pww2_timing = {
 	.pixelclock = { 64300000, 71100000, 82000000 },
 	.hactive = { 1280, 1280, 1280 },
-	.hfront_porch = { 1, 1, 10 },
-	.hback_porch = { 1, 1, 10 },
-	.hsync_len = { 58, 158, 661 },
+	.hfront_porch = { 1, 1, 64 },
+	.hback_porch = { 1, 1, 64 },
+	.hsync_len = { 58, 158, 553 },
 	.vactive = { 800, 800, 800 },
-	.vfront_porch = { 1, 1, 10 },
-	.vback_porch = { 1, 1, 10 },
-	.vsync_len = { 1, 21, 203 },
+	.vfront_porch = { 1, 1, 32 },
+	.vback_porch = { 1, 1, 32 },
+	.vsync_len = { 1, 21, 159 },
 	.flags = DISPLAY_FLAGS_DE_HIGH,
 };
 
-- 
2.41.0


  reply	other threads:[~2023-07-26 18:49 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-26 18:48 [PATCH 1/3] dt-bindings: display: panel: Move HannStar HSD101PWW2 to LVDS Thierry Reding
2023-07-26 18:48 ` Thierry Reding [this message]
2023-07-26 18:48 ` [PATCH 3/3] ARM: tegra: Use Hannstar HSD101PWW2 on Pegatron Chagall Thierry Reding
2023-07-27  7:12 ` [PATCH 1/3] dt-bindings: display: panel: Move HannStar HSD101PWW2 to LVDS Krzysztof Kozlowski
2023-07-27  7:52 ` Laurent Pinchart
2023-07-27 15:18 ` (subset) " Thierry Reding

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