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path: root/drivers/gpu/drm/drm_fb_helper.c
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Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
-rw-r--r--drivers/gpu/drm/drm_fb_helper.c224
1 files changed, 223 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 2c467131488..2537d2e8184 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -40,6 +40,196 @@ MODULE_LICENSE("GPL and additional rights");
static LIST_HEAD(kernel_fb_helper_list);
+int drm_fb_helper_add_connector(struct drm_connector *connector)
+{
+ connector->fb_helper_private = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
+ if (!connector->fb_helper_private)
+ return -ENOMEM;
+
+ return 0;
+
+}
+EXPORT_SYMBOL(drm_fb_helper_add_connector);
+
+static int my_atoi(const char *name)
+{
+ int val = 0;
+
+ for (;; name++) {
+ switch (*name) {
+ case '0' ... '9':
+ val = 10*val+(*name-'0');
+ break;
+ default:
+ return val;
+ }
+ }
+}
+
+/**
+ * drm_fb_helper_connector_parse_command_line - parse command line for connector
+ * @connector - connector to parse line for
+ * @mode_option - per connector mode option
+ *
+ * This parses the connector specific then generic command lines for
+ * modes and options to configure the connector.
+ *
+ * This uses the same parameters as the fb modedb.c, except for extra
+ * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
+ *
+ * enable/enable Digital/disable bit at the end
+ */
+static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *connector,
+ const char *mode_option)
+{
+ const char *name;
+ unsigned int namelen;
+ int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
+ unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
+ int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
+ int i;
+ enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
+ struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
+ struct drm_fb_helper_cmdline_mode *cmdline_mode = &fb_help_conn->cmdline_mode;
+
+ if (!mode_option)
+ mode_option = fb_mode_option;
+
+ if (!mode_option) {
+ cmdline_mode->specified = false;
+ return false;
+ }
+
+ name = mode_option;
+ namelen = strlen(name);
+ for (i = namelen-1; i >= 0; i--) {
+ switch (name[i]) {
+ case '@':
+ namelen = i;
+ if (!refresh_specified && !bpp_specified &&
+ !yres_specified) {
+ refresh = my_atoi(&name[i+1]);
+ refresh_specified = 1;
+ if (cvt || rb)
+ cvt = 0;
+ } else
+ goto done;
+ break;
+ case '-':
+ namelen = i;
+ if (!bpp_specified && !yres_specified) {
+ bpp = my_atoi(&name[i+1]);
+ bpp_specified = 1;
+ if (cvt || rb)
+ cvt = 0;
+ } else
+ goto done;
+ break;
+ case 'x':
+ if (!yres_specified) {
+ yres = my_atoi(&name[i+1]);
+ yres_specified = 1;
+ } else
+ goto done;
+ case '0' ... '9':
+ break;
+ case 'M':
+ if (!yres_specified)
+ cvt = 1;
+ break;
+ case 'R':
+ if (!cvt)
+ rb = 1;
+ break;
+ case 'm':
+ if (!cvt)
+ margins = 1;
+ break;
+ case 'i':
+ if (!cvt)
+ interlace = 1;
+ break;
+ case 'e':
+ force = DRM_FORCE_ON;
+ break;
+ case 'D':
+ if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) ||
+ (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
+ force = DRM_FORCE_ON;
+ else
+ force = DRM_FORCE_ON_DIGITAL;
+ break;
+ case 'd':
+ force = DRM_FORCE_OFF;
+ break;
+ default:
+ goto done;
+ }
+ }
+ if (i < 0 && yres_specified) {
+ xres = my_atoi(name);
+ res_specified = 1;
+ }
+done:
+
+ DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
+ drm_get_connector_name(connector), xres, yres,
+ (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
+ "", (margins) ? " with margins" : "", (interlace) ?
+ " interlaced" : "");
+
+ if (force) {
+ const char *s;
+ switch (force) {
+ case DRM_FORCE_OFF: s = "OFF"; break;
+ case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
+ default:
+ case DRM_FORCE_ON: s = "ON"; break;
+ }
+
+ DRM_INFO("forcing %s connector %s\n",
+ drm_get_connector_name(connector), s);
+ connector->force = force;
+ }
+
+ if (res_specified) {
+ cmdline_mode->specified = true;
+ cmdline_mode->xres = xres;
+ cmdline_mode->yres = yres;
+ }
+
+ if (refresh_specified) {
+ cmdline_mode->refresh_specified = true;
+ cmdline_mode->refresh = refresh;
+ }
+
+ if (bpp_specified) {
+ cmdline_mode->bpp_specified = true;
+ cmdline_mode->bpp = bpp;
+ }
+ cmdline_mode->rb = rb ? true : false;
+ cmdline_mode->cvt = cvt ? true : false;
+ cmdline_mode->interlace = interlace ? true : false;
+
+ return true;
+}
+
+int drm_fb_helper_parse_command_line(struct drm_device *dev)
+{
+ struct drm_connector *connector;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ char *option = NULL;
+
+ /* do something on return - turn off connector maybe */
+ if (fb_get_options(drm_get_connector_name(connector), &option))
+ continue;
+
+ drm_fb_helper_connector_parse_command_line(connector, option);
+ }
+ return 0;
+}
+
bool drm_fb_helper_force_kernel_mode(void)
{
int i = 0;
@@ -484,6 +674,8 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev,
uint32_t fb_height,
uint32_t surface_width,
uint32_t surface_height,
+ uint32_t surface_depth,
+ uint32_t surface_bpp,
struct drm_framebuffer **fb_ptr))
{
struct drm_crtc *crtc;
@@ -497,8 +689,37 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev,
struct drm_framebuffer *fb;
struct drm_mode_set *modeset = NULL;
struct drm_fb_helper *fb_helper;
+ uint32_t surface_depth = 24, surface_bpp = 32;
/* first up get a count of crtcs now in use and new min/maxes width/heights */
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
+ struct drm_fb_helper_cmdline_mode *cmdline_mode = &fb_help_conn->cmdline_mode;
+
+ if (cmdline_mode->bpp_specified) {
+ switch (cmdline_mode->bpp) {
+ case 8:
+ surface_depth = surface_bpp = 8;
+ break;
+ case 15:
+ surface_depth = 15;
+ surface_bpp = 16;
+ break;
+ case 16:
+ surface_depth = surface_bpp = 16;
+ break;
+ case 24:
+ surface_depth = surface_bpp = 24;
+ break;
+ case 32:
+ surface_depth = 24;
+ surface_bpp = 32;
+ break;
+ }
+ break;
+ }
+ }
+
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (drm_helper_crtc_in_use(crtc)) {
if (crtc->desired_mode) {
@@ -527,7 +748,8 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev,
/* do we have an fb already? */
if (list_empty(&dev->mode_config.fb_kernel_list)) {
ret = (*fb_create)(dev, fb_width, fb_height, surface_width,
- surface_height, &fb);
+ surface_height, surface_depth, surface_bpp,
+ &fb);
if (ret)
return -EINVAL;
new_fb = 1;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-12 18:46:50 +0000