[PATCH v4 0/2] drm/panel: Add BOE DV215FHM-R01 LVDS panel support

This series adds support for the BOE DV215FHM-R01 21.5" FHD
(1920x1080) dual-channel LVDS panel.

Signed-off-by: Vishnu Saini <redacted>
---
Changes in v4:
- Rebase onto drm-misc-next
- Pick up Acked-by from Liu Ying and Reviewed-by from Neil Armstrong
- Link to v3: https://lore.kernel.org/r/20260814-b4-lvds-panel-doc-v3-0-1ad152a4d3ec@oss.qualcomm.com

Changes in v3:
- Reordered commits, keeping the compatible documentation first [Krzysztof]
- Link to v2: https://lore.kernel.org/r/20260810-b4-lvds-panel-doc-v2-0-f2c2fe309989@oss.qualcomm.com

Changes in v2:
- Move panel support into panel-simple-lvds-dual-ports.yaml [Rob]
- Add  panel timings which were previously added in DT:
  [https://lore.kernel.org/all/20260719-lvds-support-v1-0-1f1aca3213ba@oss.qualcomm.com/]  
- Link to v1: https://lore.kernel.org/r/20260719-b4-lvds-panel-doc-v1-1-6a18c213c2f6@oss.qualcomm.com

---
Vishnu Saini (2):
      dt-bindings: display: simple: Add boe,dv215fhm-r01 compatible
      drm/panel: simple: Add BOE DV215FHM-R01 panel

 .../panel/panel-simple-lvds-dual-ports.yaml        |  2 ++
 drivers/gpu/drm/panel/panel-simple.c               | 28 ++++++++++++++++++++++
 2 files changed, 30 insertions(+)
---
base-commit: 97c594f71fa71dc30a0583a76d8b6ef5c5ea10b1
change-id: 20260719-b4-lvds-panel-doc-cb503c4ba2be

Best regards,
-- 
Vishnu Saini [off-list ref]

Add BOE DV215FHM-R01 21.5" FHD (1920x1080) dual-channel LVDS panel
compatible string to the panel-simple-lvds-dual-ports binding.

Acked-by: Krzysztof Kozlowski <redacted>
Acked-by: Liu Ying <victor.liu@nxp.com>
Signed-off-by: Vishnu Saini <redacted>
---
 .../devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml
index 8a2f6feafd37..68beb476fb48 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-lvds-dual-ports.yaml

@@ -44,6 +44,8 @@ properties:
       - auo,t215hvn01
         # BOE AV123Z7M-N17 12.3" (1920x720) LVDS TFT LCD panel
       - boe,av123z7m-n17
+        # BOE DV215FHM-R01 21.5" FHD (1920x1080) dual-channel LVDS panel
+      - boe,dv215fhm-r01
         # InnoLux 15.6" FHD (1920x1080) TFT LCD panel
       - innolux,g156hce-l01
         # Kaohsiung Opto-Electronics Inc. 10.1" WUXGA (1920 x 1200) LVDS TFT LCD panel

-- 
2.34.1

Add the BOE DV215FHM-R01 21.5" FHD (1920x1080) dual-channel
LVDS panel.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Vishnu Saini <redacted>
---
 drivers/gpu/drm/panel/panel-simple.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index c95964ba25a9..0b516385b267 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c

@@ -1593,6 +1593,31 @@ static const struct panel_desc boe_bp101wx1_100 = {
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
+static const struct display_timing boe_dv215fhm_r01_timing = {
+	.pixelclock = { 148500000, 148500000, 148500000 },
+	.hactive = { 1920, 1920, 1920 },
+	.hfront_porch = { 88, 88, 88 },
+	.hback_porch = { 148, 148, 148 },
+	.hsync_len = { 44, 44, 44 },
+	.vactive = { 1080, 1080, 1080 },
+	.vfront_porch = { 4, 4, 4 },
+	.vback_porch = { 36, 36, 36 },
+	.vsync_len = { 5, 5, 5 },
+	.flags = DISPLAY_FLAGS_DE_HIGH,
+};
+
+static const struct panel_desc boe_dv215fhm_r01 = {
+	.timings = &boe_dv215fhm_r01_timing,
+	.num_timings = 1,
+	.bpc = 8,
+	.size = {
+		.width = 476,
+		.height = 268,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+	.connector_type = DRM_MODE_CONNECTOR_LVDS,
+};
+
 static const struct display_timing boe_ev121wxm_n10_1850_timing = {
 	.pixelclock = { 69922000, 71000000, 72293000 },
 	.hactive = { 1280, 1280, 1280 },

@@ -5759,6 +5784,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "boe,bp101wx1-100",
 		.data = &boe_bp101wx1_100,
+	}, {
+		.compatible = "boe,dv215fhm-r01",
+		.data = &boe_dv215fhm_r01,
 	}, {
 		.compatible = "boe,ev121wxm-n10-1850",
 		.data = &boe_ev121wxm_n10_1850,

-- 
2.34.1

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] The DISPLAY_FLAGS_DE_HIGH flag in boe_dv215fhm_r01_timing is silently ignored because it is not propagated to the panel's bus_flags.
--

commit e8dda804d95e117a2144e77d29d6c181f747ad91
Author: Vishnu Saini [off-list ref]

drm/panel: simple: Add BOE DV215FHM-R01 panel
    
This commit adds support for the BOE DV215FHM-R01 21.5" FHD (1920x1080)
dual-channel LVDS panel in the panel-simple driver.

[Severity: High]
Does this panel descriptor need to set .bus_flags = DRM_BUS_FLAG_DE_HIGH?

The display_timing structure for boe_dv215fhm_r01_timing specifies
DISPLAY_FLAGS_DE_HIGH, but this flag appears to be silently ignored by the
panel-simple framework unless it is also propagated to the panel's bus_flags.

When the boe_dv215fhm_r01 panel is probed and its modes are added via
panel_simple_get_non_edid_modes(), the connector assigns:

    connector->display_info.bus_flags = panel->desc->bus_flags;

Since .bus_flags is missing from the descriptor initialization here, it
defaults to 0. This causes the Data Enable (DE) polarity requirement to be
lost. If the controller defaults to DE low, the display might not function
correctly.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260903-b4-lvds-panel-doc-v4-0-861738a0d5de@oss.qualcomm.com?part=2