This prepares the modeset code so it can be moved out as-is in the next
patch.
v3: Remove stray newline
Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
Reviewed-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
---
drivers/gpu/drm/drm_fb_helper.c | 62 +++++++++++++++++++++++----------
include/drm/drm_fb_helper.h | 4 ---
2 files changed, 44 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 3a57210c9ec9..68391f0d88b7 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -43,6 +43,10 @@
#include "drm_internal.h"
+struct drm_client_offset {
+ int x, y;
+};
+
static bool drm_fbdev_emulation = true;
module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600);
MODULE_PARM_DESC(fbdev_emulation,
@@ -1794,7 +1798,7 @@ static bool drm_client_target_cloned(struct drm_device *dev,
struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
- struct drm_fb_offset *offsets,
+ struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
int count, i, j;
@@ -1873,7 +1877,7 @@ static bool drm_client_target_cloned(struct drm_device *dev,
static int drm_client_get_tile_offsets(struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
- struct drm_fb_offset *offsets,
+ struct drm_client_offset *offsets,
int idx,
int h_idx, int v_idx)
{
@@ -1906,7 +1910,7 @@ static int drm_client_get_tile_offsets(struct drm_connector **connectors,
static bool drm_client_target_preferred(struct drm_connector **connectors,
unsigned int connector_count,
struct drm_display_mode **modes,
- struct drm_fb_offset *offsets,
+ struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
const u64 mask = BIT_ULL(connector_count) - 1;
@@ -2070,7 +2074,7 @@ static bool drm_client_firmware_config(struct drm_client_dev *client,
unsigned int connector_count,
struct drm_crtc **crtcs,
struct drm_display_mode **modes,
- struct drm_fb_offset *offsets,
+ struct drm_client_offset *offsets,
bool *enabled, int width, int height)
{
unsigned int count = min_t(unsigned int, connector_count, BITS_PER_LONG);
@@ -2239,30 +2243,47 @@ static bool drm_client_firmware_config(struct drm_client_dev *client,
return ret;
}
-static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
- u32 width, u32 height)
+/**
+ * drm_client_modeset_probe() - Probe for displays
+ * @client: DRM client
+ * @width: Maximum display mode width (optional)
+ * @height: Maximum display mode height (optional)
+ *
+ * This function sets up display pipelines for enabled connectors and stores the
+ * config in the client's modeset array.
+ *
+ * Returns:
+ * Zero on success or negative error code on failure.
+ */
+int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height)
{
struct drm_connector *connector, **connectors = NULL;
- struct drm_client_dev *client = &fb_helper->client;
struct drm_connector_list_iter conn_iter;
- struct drm_device *dev = fb_helper->dev;
+ struct drm_device *dev = client->dev;
unsigned int total_modes_count = 0;
+ struct drm_client_offset *offsets;
unsigned int connector_count = 0;
struct drm_display_mode **modes;
- struct drm_fb_offset *offsets;
struct drm_crtc **crtcs;
+ int i, ret = 0;
bool *enabled;
- int i;
DRM_DEBUG_KMS("\n");
+ if (!width)
+ width = dev->mode_config.max_width;
+ if (!height)
+ height = dev->mode_config.max_height;
+
drm_connector_list_iter_begin(dev, &conn_iter);
drm_client_for_each_connector_iter(connector, &conn_iter) {
struct drm_connector **tmp;
tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL);
- if (!tmp)
+ if (!tmp) {
+ ret = -ENOMEM;
goto free_connectors;
+ }
connectors = tmp;
drm_connector_get(connector);
@@ -2271,7 +2292,7 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
drm_connector_list_iter_end(&conn_iter);
if (!connector_count)
- return;
+ return 0;
crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL);
modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL);
@@ -2279,12 +2300,13 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL);
if (!crtcs || !modes || !enabled || !offsets) {
DRM_ERROR("Memory allocation failed\n");
+ ret = -ENOMEM;
goto out;
}
mutex_lock(&client->modeset_mutex);
- mutex_lock(&fb_helper->dev->mode_config.mutex);
+ mutex_lock(&dev->mode_config.mutex);
for (i = 0; i < connector_count; i++)
total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height);
if (!total_modes_count)
@@ -2309,14 +2331,14 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
drm_client_pick_crtcs(client, connectors, connector_count,
crtcs, modes, 0, width, height);
}
- mutex_unlock(&fb_helper->dev->mode_config.mutex);
+ mutex_unlock(&dev->mode_config.mutex);
drm_client_modeset_release(client);
for (i = 0; i < connector_count; i++) {
struct drm_display_mode *mode = modes[i];
struct drm_crtc *crtc = crtcs[i];
- struct drm_fb_offset *offset = &offsets[i];
+ struct drm_client_offset *offset = &offsets[i];
if (mode && crtc) {
struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc);
@@ -2326,8 +2348,10 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
mode->name, crtc->base.id, offset->x, offset->y);
if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
- (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1)))
+ (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) {
+ ret = -EINVAL;
break;
+ }
modeset->mode = drm_mode_duplicate(dev, mode);
drm_connector_get(connector);
@@ -2347,6 +2371,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
for (i = 0; i < connector_count; i++)
drm_connector_put(connectors[i]);
kfree(connectors);
+
+ return ret;
}
/*
@@ -2428,7 +2454,7 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper,
width = dev->mode_config.max_width;
height = dev->mode_config.max_height;
- drm_setup_crtcs(fb_helper, width, height);
+ drm_client_modeset_probe(&fb_helper->client, width, height);
ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
if (ret < 0) {
if (ret == -EAGAIN) {
@@ -2576,7 +2602,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
DRM_DEBUG_KMS("\n");
- drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height);
+ drm_client_modeset_probe(&fb_helper->client, fb_helper->fb->width, fb_helper->fb->height);
drm_setup_crtcs_fb(fb_helper);
mutex_unlock(&fb_helper->lock);
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index e14d52ef9638..c8a8ae2a678a 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -43,10 +43,6 @@ enum mode_set_atomic {
ENTER_ATOMIC_MODE_SET,
};
-struct drm_fb_offset {
- int x, y;
-};
-
/**
* struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
* @fb_width: fbdev width
--
2.20.1
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