From: Eric Anholt <eric@anholt.net>
To: dri-devel@lists.freedesktop.org,
Archit Taneja <architt@codeaurora.org>,
Andrzej Hajda <a.hajda@samsung.com>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Thierry Reding <thierry.reding@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 5/8] drm/vc4: Delay DSI host registration until the panel has probed.
Date: Tue, 27 Jun 2017 12:58:36 -0700 [thread overview]
Message-ID: <20170627195839.3338-6-eric@anholt.net> (raw)
In-Reply-To: <20170627195839.3338-1-eric@anholt.net>
The vc4 driver was unusual in that it was delaying the panel lookup
until the attach step, while most DSI hosts will -EPROBE_DEFER until
they get a panel.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/vc4_dsi.c | 40 ++++++++++++++++------------------------
1 file changed, 16 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
index fca4d7fd677e..31627522dd8c 100644
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -33,6 +33,7 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
@@ -504,7 +505,6 @@ struct vc4_dsi {
struct mipi_dsi_host dsi_host;
struct drm_encoder *encoder;
struct drm_bridge *bridge;
- bool is_panel_bridge;
void __iomem *regs;
@@ -1290,7 +1290,6 @@ static int vc4_dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *device)
{
struct vc4_dsi *dsi = host_to_dsi(host);
- int ret = 0;
dsi->lanes = device->lanes;
dsi->channel = device->channel;
@@ -1325,34 +1324,12 @@ static int vc4_dsi_host_attach(struct mipi_dsi_host *host,
return 0;
}
- dsi->bridge = of_drm_find_bridge(device->dev.of_node);
- if (!dsi->bridge) {
- struct drm_panel *panel =
- of_drm_find_panel(device->dev.of_node);
-
- dsi->bridge = drm_panel_bridge_add(panel,
- DRM_MODE_CONNECTOR_DSI);
- if (IS_ERR(dsi->bridge)) {
- ret = PTR_ERR(dsi->bridge);
- dsi->bridge = NULL;
- return ret;
- }
- dsi->is_panel_bridge = true;
- }
-
return drm_bridge_attach(dsi->encoder, dsi->bridge, NULL);
}
static int vc4_dsi_host_detach(struct mipi_dsi_host *host,
struct mipi_dsi_device *device)
{
- struct vc4_dsi *dsi = host_to_dsi(host);
-
- if (dsi->is_panel_bridge) {
- drm_panel_bridge_remove(dsi->bridge);
- dsi->bridge = NULL;
- }
-
return 0;
}
@@ -1496,6 +1473,7 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_dsi *dsi;
struct vc4_dsi_encoder *vc4_dsi_encoder;
+ struct drm_panel *panel;
const struct of_device_id *match;
dma_cap_mask_t dma_mask;
int ret;
@@ -1599,6 +1577,20 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
return ret;
}
+ ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
+ &panel, &dsi->bridge);
+ if (ret) {
+ dev_info(dev, "find panel: %d\n", ret);
+ return ret;
+ }
+
+ if (panel) {
+ dsi->bridge = devm_drm_panel_bridge_add(dev, panel,
+ DRM_MODE_CONNECTOR_DSI);
+ if (IS_ERR(dsi->bridge))
+ return PTR_ERR(dsi->bridge);
+ }
+
/* The esc clock rate is supposed to always be 100Mhz. */
ret = clk_set_rate(dsi->escape_clock, 100 * 1000000);
if (ret) {
--
2.11.0
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next prev parent reply other threads:[~2017-06-27 19:58 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-27 19:58 [PATCH 0/8] RPi touchscreen panel driver v4 Eric Anholt
2017-06-27 19:58 ` [PATCH 1/8] drm/vc4: Fix DSI T_INIT timing Eric Anholt
2017-06-29 9:02 ` Andrzej Hajda
2017-06-27 19:58 ` [PATCH 2/8] drm/vc4: Fix misleading name of the continuous flag Eric Anholt
2017-06-29 9:03 ` Andrzej Hajda
2017-06-27 19:58 ` [PATCH 3/8] drm/vc4: Use drm_mode_vrefresh() in DSI fixup, in case vrefresh is 0 Eric Anholt
2017-06-29 9:24 ` Andrzej Hajda
2017-06-27 19:58 ` [PATCH 4/8] drm/bridge: Add a devm_ allocator for panel bridge Eric Anholt
2017-06-29 9:30 ` Andrzej Hajda
2017-06-27 19:58 ` Eric Anholt [this message]
2017-06-29 9:42 ` [PATCH 5/8] drm/vc4: Delay DSI host registration until the panel has probed Andrzej Hajda
2017-06-27 19:58 ` [PATCH 6/8] drm: Allow DSI devices to be registered before the host registers Eric Anholt
2017-06-29 5:03 ` Archit Taneja
2017-06-29 10:39 ` Andrzej Hajda
2017-06-29 15:22 ` Eric Anholt
2017-06-30 8:48 ` Andrzej Hajda
2017-07-03 10:56 ` Archit Taneja
2017-07-14 23:01 ` Eric Anholt
2017-07-17 13:39 ` Archit Taneja
2017-07-14 22:58 ` Eric Anholt
2017-07-17 4:26 ` Archit Taneja
2017-07-18 20:13 ` Eric Anholt
2017-07-19 3:29 ` Archit Taneja
2017-08-04 9:29 ` Boris Brezillon
2017-06-27 19:58 ` [PATCH 7/8] dt-bindings: Document the Raspberry Pi Touchscreen nodes Eric Anholt
2017-06-27 19:58 ` [PATCH 8/8] drm/panel: Add support for the Raspberry Pi 7" Touchscreen Eric Anholt
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