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From: Giulio Benetti <giulio.benetti@micronovasrl.com>
To: Maxime Ripard <maxime@cerno.tech>
Cc: Marjan Pascolo <marjan.pascolo@trexom.it>,
	wens@csie.org, daniel@ffwll.ch, airlied@linux.ie,
	treding@nvidia.com, Jernej Skrabec <jernej.skrabec@siol.net>,
	dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Giulio Benetti <giulio.benetti@micronovasrl.com>
Subject: [PATCH 1/2] drm/sun4i: tcon: fix inverted DCLK polarity
Date: Wed,  6 Jan 2021 20:27:59 +0100	[thread overview]
Message-ID: <20210106192800.164052-2-giulio.benetti@micronovasrl.com> (raw)
In-Reply-To: <20210106192800.164052-1-giulio.benetti@micronovasrl.com>

During commit "88bc4178568b8e0331143cc0616640ab72f0cba1" DRM_BUS_FLAG_*
macros have been changed to avoid ambiguity but just because of this
ambiguity previous DRM_BUS_FLAG_PIXDATA_(POS/NEG)EDGE were used meaning
_SAMPLE_ not _DRIVE_. This lead to DLCK inversion, so let's swap DCLK
phase to fix it.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index eaaf5d70e352..52598bb0fb0b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -585,10 +585,10 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	 * and DOTCLOCK drivers.
 	 */
 	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
-		clk_set_phase(tcon->dclk, 240);
+		clk_set_phase(tcon->dclk, 0);
 
 	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
-		clk_set_phase(tcon->dclk, 0);
+		clk_set_phase(tcon->dclk, 240);
 
 	regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
 			   SUN4I_TCON0_IO_POL_HSYNC_POSITIVE |
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Giulio Benetti <giulio.benetti@micronovasrl.com>
To: Maxime Ripard <maxime@cerno.tech>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>,
	airlied@linux.ie, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, wens@csie.org,
	linux-arm-kernel@lists.infradead.org, daniel@ffwll.ch,
	treding@nvidia.com,
	Giulio Benetti <giulio.benetti@micronovasrl.com>,
	Marjan Pascolo <marjan.pascolo@trexom.it>
Subject: [PATCH 1/2] drm/sun4i: tcon: fix inverted DCLK polarity
Date: Wed,  6 Jan 2021 20:27:59 +0100	[thread overview]
Message-ID: <20210106192800.164052-2-giulio.benetti@micronovasrl.com> (raw)
In-Reply-To: <20210106192800.164052-1-giulio.benetti@micronovasrl.com>

During commit "88bc4178568b8e0331143cc0616640ab72f0cba1" DRM_BUS_FLAG_*
macros have been changed to avoid ambiguity but just because of this
ambiguity previous DRM_BUS_FLAG_PIXDATA_(POS/NEG)EDGE were used meaning
_SAMPLE_ not _DRIVE_. This lead to DLCK inversion, so let's swap DCLK
phase to fix it.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index eaaf5d70e352..52598bb0fb0b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -585,10 +585,10 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	 * and DOTCLOCK drivers.
 	 */
 	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
-		clk_set_phase(tcon->dclk, 240);
+		clk_set_phase(tcon->dclk, 0);
 
 	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
-		clk_set_phase(tcon->dclk, 0);
+		clk_set_phase(tcon->dclk, 240);
 
 	regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
 			   SUN4I_TCON0_IO_POL_HSYNC_POSITIVE |
-- 
2.25.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Giulio Benetti <giulio.benetti@micronovasrl.com>
To: Maxime Ripard <maxime@cerno.tech>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>,
	airlied@linux.ie, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, wens@csie.org,
	linux-arm-kernel@lists.infradead.org, treding@nvidia.com,
	Giulio Benetti <giulio.benetti@micronovasrl.com>,
	Marjan Pascolo <marjan.pascolo@trexom.it>
Subject: [PATCH 1/2] drm/sun4i: tcon: fix inverted DCLK polarity
Date: Wed,  6 Jan 2021 20:27:59 +0100	[thread overview]
Message-ID: <20210106192800.164052-2-giulio.benetti@micronovasrl.com> (raw)
In-Reply-To: <20210106192800.164052-1-giulio.benetti@micronovasrl.com>

During commit "88bc4178568b8e0331143cc0616640ab72f0cba1" DRM_BUS_FLAG_*
macros have been changed to avoid ambiguity but just because of this
ambiguity previous DRM_BUS_FLAG_PIXDATA_(POS/NEG)EDGE were used meaning
_SAMPLE_ not _DRIVE_. This lead to DLCK inversion, so let's swap DCLK
phase to fix it.

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index eaaf5d70e352..52598bb0fb0b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -585,10 +585,10 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	 * and DOTCLOCK drivers.
 	 */
 	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
-		clk_set_phase(tcon->dclk, 240);
+		clk_set_phase(tcon->dclk, 0);
 
 	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
-		clk_set_phase(tcon->dclk, 0);
+		clk_set_phase(tcon->dclk, 240);
 
 	regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
 			   SUN4I_TCON0_IO_POL_HSYNC_POSITIVE |
-- 
2.25.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

  reply	other threads:[~2021-01-06 19:37 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-06 19:27 [PATCH 0/2] drm/sun4i: fix DCLK and improve its handling Giulio Benetti
2021-01-06 19:27 ` Giulio Benetti
2021-01-06 19:27 ` Giulio Benetti
2021-01-06 19:27 ` Giulio Benetti [this message]
2021-01-06 19:27   ` [PATCH 1/2] drm/sun4i: tcon: fix inverted DCLK polarity Giulio Benetti
2021-01-06 19:27   ` Giulio Benetti
2021-01-06 21:00   ` Jernej Škrabec
2021-01-06 21:00     ` Jernej Škrabec
2021-01-06 21:00     ` Jernej Škrabec
2021-01-07  2:30     ` [PATCH v2 0/2] drm/sun4i: fix DCLK and improve its handling Giulio Benetti
2021-01-07  2:30       ` Giulio Benetti
2021-01-07  2:30       ` Giulio Benetti
2021-01-07  2:30       ` [PATCH v2 1/2] drm/sun4i: tcon: fix inverted DCLK polarity Giulio Benetti
2021-01-07  2:30         ` Giulio Benetti
2021-01-07  2:30         ` Giulio Benetti
2021-01-07  2:30       ` [PATCH v2 2/2] drm/sun4i: tcon: improve DCLK polarity handling Giulio Benetti
2021-01-07  2:30         ` Giulio Benetti
2021-01-07  2:30         ` Giulio Benetti
2021-01-08  9:23         ` Maxime Ripard
2021-01-08  9:23           ` Maxime Ripard
2021-01-08  9:23           ` Maxime Ripard
2021-01-08  9:32           ` Marjan Pascolo
2021-01-08 14:46             ` Giulio Benetti
2021-01-08 14:46               ` Giulio Benetti
2021-01-08 14:46               ` Giulio Benetti
2021-01-08 14:34           ` Giulio Benetti
2021-01-08 14:34             ` Giulio Benetti
2021-01-08 14:34             ` Giulio Benetti
2021-01-11 17:20             ` Maxime Ripard
2021-01-11 17:20               ` Maxime Ripard
2021-01-11 17:20               ` Maxime Ripard
2021-01-11 17:37               ` Giulio Benetti
2021-01-11 17:37                 ` Giulio Benetti
2021-01-11 17:37                 ` Giulio Benetti
2021-01-11 17:46               ` [PATCH v3] drm/sun4i: tcon: fix inverted DCLK polarity Giulio Benetti
2021-01-11 17:46                 ` Giulio Benetti
2021-01-11 17:46                 ` Giulio Benetti
2021-01-13  9:42                 ` Maxime Ripard
2021-01-13  9:42                   ` Maxime Ripard
2021-01-13  9:42                   ` Maxime Ripard
2021-01-13 10:47                   ` [PATCH v4] " Giulio Benetti
2021-01-13 10:47                     ` Giulio Benetti
2021-01-13 10:47                     ` Giulio Benetti
2021-01-13 16:05                     ` [PATCH v5] " Giulio Benetti
2021-01-13 16:05                       ` Giulio Benetti
2021-01-13 16:05                       ` Giulio Benetti
2021-01-14  1:32                       ` kernel test robot
2021-01-14  1:32                         ` kernel test robot
2021-01-14  1:32                         ` kernel test robot
2021-01-14  1:32                         ` kernel test robot
2021-01-14  7:58                       ` Marjan Pascolo
2021-01-14  7:58                         ` Marjan Pascolo
2021-01-14  7:58                         ` Marjan Pascolo
2021-01-14  8:12                         ` Giulio Benetti
2021-01-14  8:12                           ` Giulio Benetti
2021-01-14  8:12                           ` Giulio Benetti
2021-01-14  8:17                         ` [PATCH v6] " Giulio Benetti
2021-01-14  8:17                           ` Giulio Benetti
2021-01-14  8:17                           ` Giulio Benetti
2021-01-14 11:40                           ` Marjan Pascolo
2021-01-14 11:40                             ` Marjan Pascolo
2021-01-14 11:40                             ` Marjan Pascolo
2021-01-14 11:42                           ` Maxime Ripard
2021-01-14 11:42                             ` Maxime Ripard
2021-01-14 11:42                             ` Maxime Ripard
2021-02-10 16:22                             ` [PATCH] pinctrl/sunxi: adding input-debounce-ns property Marjan Pascolo
2021-02-10 16:22                               ` Marjan Pascolo
2021-02-10 16:22                               ` Marjan Pascolo
2021-02-17 11:03                               ` Maxime Ripard
2021-02-17 11:03                                 ` Maxime Ripard
2021-02-17 11:03                                 ` Maxime Ripard
2021-02-26 12:53                                 ` Marjan Pascolo
2021-02-26 12:53                                   ` Marjan Pascolo
2021-02-26 12:53                                   ` Marjan Pascolo
2021-03-04 15:51                                   ` Maxime Ripard
2021-03-04 15:51                                     ` Maxime Ripard
2021-03-04 15:51                                     ` Maxime Ripard
2021-01-13 10:48                   ` [PATCH v3] drm/sun4i: tcon: fix inverted DCLK polarity Giulio Benetti
2021-01-13 10:48                     ` Giulio Benetti
2021-01-13 10:48                     ` Giulio Benetti
2021-01-06 19:28 ` [PATCH 2/2] drm/sun4i: tcon: improve DCLK polarity handling Giulio Benetti
2021-01-06 19:28   ` Giulio Benetti
2021-01-06 19:28   ` Giulio Benetti

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