From: Eric Anholt <eric@anholt.net>
Date: Thu, 11 May 2017 11:31:23 -0700
Subject: drm/vc4: Switch DSI to the panel-bridge layer, and support bridges.
Git-commit: 656fa22f9ceabbae74ea4628dd02d297aa07104b
Patch-mainline: v4.13-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
The newer version of the RPi panel driver is going to be a combination
of a bridge and a panel, but we should also support panels without a
bridge, so the panel-bridge layer lets us do that cleanly.
v2: Drop "dev" argument.
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170511183128.25085-2-eric@anholt.net
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/vc4/Kconfig | 2
drivers/gpu/drm/vc4/vc4_dsi.c | 156 +++++-------------------------------------
2 files changed, 22 insertions(+), 136 deletions(-)
--- a/drivers/gpu/drm/vc4/Kconfig
+++ b/drivers/gpu/drm/vc4/Kconfig
@@ -7,7 +7,7 @@ config DRM_VC4
select DRM_KMS_HELPER
select DRM_KMS_CMA_HELPER
select DRM_GEM_CMA_HELPER
- select DRM_PANEL
+ select DRM_PANEL_BRIDGE
select SND_PCM
select SND_PCM_ELD
select SND_SOC_GENERIC_DMAENGINE_PCM
--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -503,8 +503,8 @@ struct vc4_dsi {
struct mipi_dsi_host dsi_host;
struct drm_encoder *encoder;
- struct drm_connector *connector;
- struct drm_panel *panel;
+ struct drm_bridge *bridge;
+ bool is_panel_bridge;
void __iomem *regs;
@@ -605,18 +605,6 @@ to_vc4_dsi_encoder(struct drm_encoder *e
return container_of(encoder, struct vc4_dsi_encoder, base.base);
}
-/* VC4 DSI connector KMS struct */
-struct vc4_dsi_connector {
- struct drm_connector base;
- struct vc4_dsi *dsi;
-};
-
-static inline struct vc4_dsi_connector *
-to_vc4_dsi_connector(struct drm_connector *connector)
-{
- return container_of(connector, struct vc4_dsi_connector, base);
-}
-
#define DSI_REG(reg) { reg, #reg }
static const struct {
u32 reg;
@@ -724,79 +712,6 @@ int vc4_dsi_debugfs_regs(struct seq_file
}
#endif
-static enum drm_connector_status
-vc4_dsi_connector_detect(struct drm_connector *connector, bool force)
-{
- struct vc4_dsi_connector *vc4_connector =
- to_vc4_dsi_connector(connector);
- struct vc4_dsi *dsi = vc4_connector->dsi;
-
- if (dsi->panel)
- return connector_status_connected;
- else
- return connector_status_disconnected;
-}
-
-static void vc4_dsi_connector_destroy(struct drm_connector *connector)
-{
- drm_connector_unregister(connector);
- drm_connector_cleanup(connector);
-}
-
-static int vc4_dsi_connector_get_modes(struct drm_connector *connector)
-{
- struct vc4_dsi_connector *vc4_connector =
- to_vc4_dsi_connector(connector);
- struct vc4_dsi *dsi = vc4_connector->dsi;
-
- if (dsi->panel)
- return drm_panel_get_modes(dsi->panel);
-
- return 0;
-}
-
-static const struct drm_connector_funcs vc4_dsi_connector_funcs = {
- .dpms = drm_atomic_helper_connector_dpms,
- .detect = vc4_dsi_connector_detect,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = vc4_dsi_connector_destroy,
- .reset = drm_atomic_helper_connector_reset,
- .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
- .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static const struct drm_connector_helper_funcs vc4_dsi_connector_helper_funcs = {
- .get_modes = vc4_dsi_connector_get_modes,
-};
-
-static struct drm_connector *vc4_dsi_connector_init(struct drm_device *dev,
- struct vc4_dsi *dsi)
-{
- struct drm_connector *connector;
- struct vc4_dsi_connector *dsi_connector;
-
- dsi_connector = devm_kzalloc(dev->dev, sizeof(*dsi_connector),
- GFP_KERNEL);
- if (!dsi_connector)
- return ERR_PTR(-ENOMEM);
-
- connector = &dsi_connector->base;
-
- dsi_connector->dsi = dsi;
-
- drm_connector_init(dev, connector, &vc4_dsi_connector_funcs,
- DRM_MODE_CONNECTOR_DSI);
- drm_connector_helper_add(connector, &vc4_dsi_connector_helper_funcs);
-
- connector->polled = 0;
- connector->interlace_allowed = 0;
- connector->doublescan_allowed = 0;
-
- drm_mode_connector_attach_encoder(connector, dsi->encoder);
-
- return connector;
-}
-
static void vc4_dsi_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
@@ -894,12 +809,8 @@ static void vc4_dsi_encoder_disable(stru
struct vc4_dsi *dsi = vc4_encoder->dsi;
struct device *dev = &dsi->pdev->dev;
- drm_panel_disable(dsi->panel);
-
vc4_dsi_ulps(dsi, true);
- drm_panel_unprepare(dsi->panel);
-
clk_disable_unprepare(dsi->pll_phy_clock);
clk_disable_unprepare(dsi->escape_clock);
clk_disable_unprepare(dsi->pixel_clock);
@@ -984,12 +895,6 @@ static void vc4_dsi_encoder_enable(struc
return;
}
- ret = drm_panel_prepare(dsi->panel);
- if (ret) {
- DRM_ERROR("Panel failed to prepare\n");
- return;
- }
-
if (debug_dump_regs) {
DRM_INFO("DSI regs before:\n");
vc4_dsi_dump_regs(dsi);
@@ -1211,13 +1116,6 @@ static void vc4_dsi_encoder_enable(struc
DRM_INFO("DSI regs after:\n");
vc4_dsi_dump_regs(dsi);
}
-
- ret = drm_panel_enable(dsi->panel);
- if (ret) {
- DRM_ERROR("Panel failed to enable\n");
- drm_panel_unprepare(dsi->panel);
- return;
- }
}
static ssize_t vc4_dsi_host_transfer(struct mipi_dsi_host *host,
@@ -1415,17 +1313,22 @@ static int vc4_dsi_host_attach(struct mi
return 0;
}
- dsi->panel = of_drm_find_panel(device->dev.of_node);
- if (!dsi->panel)
- return 0;
-
- ret = drm_panel_attach(dsi->panel, dsi->connector);
- if (ret != 0)
- return ret;
-
- drm_helper_hpd_irq_event(dsi->connector->dev);
+ 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 0;
+ return drm_bridge_attach(dsi->encoder, dsi->bridge, NULL);
}
static int vc4_dsi_host_detach(struct mipi_dsi_host *host,
@@ -1433,15 +1336,9 @@ static int vc4_dsi_host_detach(struct mi
{
struct vc4_dsi *dsi = host_to_dsi(host);
- if (dsi->panel) {
- int ret = drm_panel_detach(dsi->panel);
-
- if (ret)
- return ret;
-
- dsi->panel = NULL;
-
- drm_helper_hpd_irq_event(dsi->connector->dev);
+ if (dsi->is_panel_bridge) {
+ drm_panel_bridge_remove(dsi->bridge);
+ dsi->bridge = NULL;
}
return 0;
@@ -1708,12 +1605,6 @@ static int vc4_dsi_bind(struct device *d
DRM_MODE_ENCODER_DSI, NULL);
drm_encoder_helper_add(dsi->encoder, &vc4_dsi_encoder_helper_funcs);
- dsi->connector = vc4_dsi_connector_init(drm, dsi);
- if (IS_ERR(dsi->connector)) {
- ret = PTR_ERR(dsi->connector);
- goto err_destroy_encoder;
- }
-
dsi->dsi_host.ops = &vc4_dsi_host_ops;
dsi->dsi_host.dev = dev;
@@ -1724,11 +1615,6 @@ static int vc4_dsi_bind(struct device *d
pm_runtime_enable(dev);
return 0;
-
-err_destroy_encoder:
- vc4_dsi_encoder_destroy(dsi->encoder);
-
- return ret;
}
static void vc4_dsi_unbind(struct device *dev, struct device *master,
@@ -1740,7 +1626,7 @@ static void vc4_dsi_unbind(struct device
pm_runtime_disable(dev);
- vc4_dsi_connector_destroy(dsi->connector);
+ drm_bridge_remove(dsi->bridge);
vc4_dsi_encoder_destroy(dsi->encoder);
mipi_dsi_host_unregister(&dsi->dsi_host);