linux-kernel - [PATCH] drm/panel: ltk050h3146w: Set burst mode for ltk050h3148w

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 13 Dec 2023 15:50:45 +0100
From:   Farouk Bouabid <farouk.bouabid@...obroma-systems.com>
To:     quentin.schulz@...obroma-systems.com, neil.armstrong@...aro.org,
        quic_jesszhan@...cinc.com, sam@...nborg.org,
        maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch
Cc:     heiko@...ech.de, victor.liu@....com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Farouk Bouabid <farouk.bouabid@...obroma-systems.com>
Subject: [PATCH] drm/panel: ltk050h3146w: Set burst mode for ltk050h3148w

The ltk050h3148w variant expects the horizontal component lane byte clock
cycle(lbcc) to be calculated using lane_mbps (burst mode) instead of the
pixel clock.
Using the pixel clock rate by default for this calculation was introduced
in commit ac87d23694f4 ("drm/bridge: synopsys: dw-mipi-dsi: Use pixel clock
rate to calculate lbcc") and starting from commit 93e82bb4de01
("drm/bridge: synopsys: dw-mipi-dsi: Fix hcomponent lbcc for burst mode")
only panels that support burst mode can keep using the lane_mbps. So add
MIPI_DSI_MODE_VIDEO_BURST as part of the mode_flags for the dsi host.

Fixes: 93e82bb4de01 ("drm/bridge: synopsys: dw-mipi-dsi: Fix hcomponent lbcc for burst mode")
Signed-off-by: Farouk Bouabid <farouk.bouabid@...obroma-systems.com>
---
 drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
index 6e3670508e3a..30919c872ac8 100644
--- a/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
+++ b/drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c
@@ -326,7 +326,7 @@ static const struct drm_display_mode ltk050h3148w_mode = {
 static const struct ltk050h3146w_desc ltk050h3148w_data = {
 	.mode = &ltk050h3148w_mode,
 	.init = ltk050h3148w_init_sequence,
-	.mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
+	.mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_VIDEO_BURST,
 };
 
 static int ltk050h3146w_init_sequence(struct ltk050h3146w *ctx)
-- 
2.34.1