mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 17:18:59 +00:00
79 lines
2.9 KiB
Diff
79 lines
2.9 KiB
Diff
|
From 2e4ad74553a929623fd09b2baf2ac73bc4adcd80 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Eric Anholt <eric@anholt.net>
|
||
|
|
Date: Fri, 9 Mar 2018 15:32:56 -0800
|
||
|
|
Subject: [PATCH 349/454] drm/vc4: Fix oops dereferencing DPI's connector since
|
||
|
|
panel_bridge.
|
||
|
|
|
||
|
|
In the cleanup, I didn't notice that we needed to dereference the
|
||
|
|
connector for the bus_format. Fix the regression by looking up the
|
||
|
|
first (and only) connector attached to us, and assume that its
|
||
|
|
bus_format is what we want. Some day it would be good to have that
|
||
|
|
part of display_info attached to the bridge, instead.
|
||
|
|
|
||
|
|
v2: Fix stray whitespace change
|
||
|
|
|
||
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
||
|
|
Fixes: 7b1298e05310 ("drm/vc4: Switch DPI to using the panel-bridge helper.")
|
||
|
|
Link: https://patchwork.freedesktop.org/patch/msgid/20180309233256.1667-1-eric@anholt.net
|
||
|
|
Reviewed-by: Sean Paul <seanpaul@chromium.org>
|
||
|
|
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
|
||
|
|
(cherry picked from commit 721fe38db2010e8d475abf2c1d2bafb6dc031741)
|
||
|
|
---
|
||
|
|
drivers/gpu/drm/vc4/vc4_dpi.c | 25 ++++++++++++++++++++++---
|
||
|
|
1 file changed, 22 insertions(+), 3 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
|
||
|
|
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
|
||
|
|
@@ -96,7 +96,6 @@ struct vc4_dpi {
|
||
|
|
struct platform_device *pdev;
|
||
|
|
|
||
|
|
struct drm_encoder *encoder;
|
||
|
|
- struct drm_connector *connector;
|
||
|
|
struct drm_bridge *bridge;
|
||
|
|
bool is_panel_bridge;
|
||
|
|
|
||
|
|
@@ -166,14 +165,31 @@ static void vc4_dpi_encoder_disable(stru
|
||
|
|
|
||
|
|
static void vc4_dpi_encoder_enable(struct drm_encoder *encoder)
|
||
|
|
{
|
||
|
|
+ struct drm_device *dev = encoder->dev;
|
||
|
|
struct drm_display_mode *mode = &encoder->crtc->mode;
|
||
|
|
struct vc4_dpi_encoder *vc4_encoder = to_vc4_dpi_encoder(encoder);
|
||
|
|
struct vc4_dpi *dpi = vc4_encoder->dpi;
|
||
|
|
+ struct drm_connector_list_iter conn_iter;
|
||
|
|
+ struct drm_connector *connector = NULL, *connector_scan;
|
||
|
|
u32 dpi_c = DPI_ENABLE | DPI_OUTPUT_ENABLE_MODE;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
- if (dpi->connector->display_info.num_bus_formats) {
|
||
|
|
- u32 bus_format = dpi->connector->display_info.bus_formats[0];
|
||
|
|
+ /* Look up the connector attached to DPI so we can get the
|
||
|
|
+ * bus_format. Ideally the bridge would tell us the
|
||
|
|
+ * bus_format we want, but it doesn't yet, so assume that it's
|
||
|
|
+ * uniform throughout the bridge chain.
|
||
|
|
+ */
|
||
|
|
+ drm_connector_list_iter_begin(dev, &conn_iter);
|
||
|
|
+ drm_for_each_connector_iter(connector_scan, &conn_iter) {
|
||
|
|
+ if (connector_scan->encoder == encoder) {
|
||
|
|
+ connector = connector_scan;
|
||
|
|
+ break;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+ drm_connector_list_iter_end(&conn_iter);
|
||
|
|
+
|
||
|
|
+ if (connector && connector->display_info.num_bus_formats) {
|
||
|
|
+ u32 bus_format = connector->display_info.bus_formats[0];
|
||
|
|
|
||
|
|
switch (bus_format) {
|
||
|
|
case MEDIA_BUS_FMT_RGB888_1X24:
|
||
|
|
@@ -201,6 +217,9 @@ static void vc4_dpi_encoder_enable(struc
|
||
|
|
DRM_ERROR("Unknown media bus format %d\n", bus_format);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
+ } else {
|
||
|
|
+ /* Default to 24bit if no connector found. */
|
||
|
|
+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB, DPI_FORMAT);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
|