| Message ID | 791ec173cce4007a7eadf2e68877bb640bf8dd84.1555591281.git-series.maxime.ripard@bootlin.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/vc4: Allow for more boot-time configuration | expand |
Den 18.04.2019 14.41, skrev Maxime Ripard: > From: Maxime Ripard <maxime.ripard@free-electrons.com> > > The drm subsystem also uses the video= kernel parameter, and in the > documentation refers to the fbdev documentation for that parameter. > > However, that documentation also says that instead of giving the mode using > its resolution we can also give a name. However, DRM doesn't handle that > case at the moment. Even though in most case it shouldn't make any > difference, it might be useful for analog modes, where different standards > might have the same resolution, but still have a few different parameters > that are not encoded in the modes (NTSC vs NTSC-J vs PAL-M for example). > > Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> > --- > drivers/gpu/drm/drm_client_modeset.c | 4 ++- > drivers/gpu/drm/drm_connector.c | 3 +- > drivers/gpu/drm/drm_modes.c | 52 ++++++++++++++++++++--------- > include/drm/drm_connector.h | 1 +- > 4 files changed, 44 insertions(+), 16 deletions(-) > > diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c > index 2a428ac00930..f2869c82510c 100644 > --- a/drivers/gpu/drm/drm_client_modeset.c > +++ b/drivers/gpu/drm/drm_client_modeset.c > @@ -149,6 +149,10 @@ drm_connector_pick_cmdline_mode(struct drm_connector *connector) > prefer_non_interlace = !cmdline_mode->interlace; > again: > list_for_each_entry(mode, &connector->modes, head) { > + /* Check (optional) mode name first */ > + if (!strcmp(mode->name, cmdline_mode->name)) > + return mode; > + > /* check width/height */ > if (mode->hdisplay != cmdline_mode->xres || > mode->vdisplay != cmdline_mode->yres) > diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c > index 2355124849db..e33814f5940e 100644 > --- a/drivers/gpu/drm/drm_connector.c > +++ b/drivers/gpu/drm/drm_connector.c > @@ -139,8 +139,9 @@ static void drm_connector_get_cmdline_mode(struct drm_connector *connector) > connector->force = mode->force; > } > > - DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", > + DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n", > connector->name, > + mode->name ? mode->name : "", > mode->xres, mode->yres, > mode->refresh_specified ? mode->refresh : 60, > mode->rb ? " reduced blanking" : "", > diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c > index 3f89198f0891..9613c1a28487 100644 > --- a/drivers/gpu/drm/drm_modes.c > +++ b/drivers/gpu/drm/drm_modes.c > @@ -1557,7 +1557,7 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, > struct drm_cmdline_mode *mode) > { > const char *name; > - bool parse_extras = false; > + bool named_mode = false, parse_extras = false; You don't need to assign a value here, or if you do, you can drop the else further down. Reviewed-by: Noralf Trønnes <noralf@tronnes.org> > unsigned int bpp_off = 0, refresh_off = 0; > unsigned int mode_end = 0; > char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; > @@ -1576,8 +1576,14 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, > > name = mode_option; > > + /* > + * If the first character is not a digit, then it means that > + * we have a named mode. > + */ > if (!isdigit(name[0])) > - return false; > + named_mode = true; > + else > + named_mode = false; > > /* Try to locate the bpp and refresh specifiers, if any */ > bpp_ptr = strchr(name, '-'); > @@ -1588,6 +1594,9 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, > > refresh_ptr = strchr(name, '@'); > if (refresh_ptr) { > + if (named_mode) > + return false; > + > refresh_off = refresh_ptr - name; > mode->refresh_specified = true; > } > @@ -1604,12 +1613,16 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, > parse_extras = true; > } > > - ret = drm_mode_parse_cmdline_res_mode(name, mode_end, > - parse_extras, > - connector, > - mode); > - if (ret) > - return false; > + if (named_mode) { > + strncpy(mode->name, name, mode_end); > + } else { > + ret = drm_mode_parse_cmdline_res_mode(name, mode_end, > + parse_extras, > + connector, > + mode); > + if (ret) > + return false; > + } > mode->specified = true; > > if (bpp_ptr) { > @@ -1637,14 +1650,23 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, > extra_ptr = refresh_end_ptr; > > if (extra_ptr) { > - int remaining = strlen(name) - (extra_ptr - name); > + if (!named_mode) { > + int len = strlen(name) - (extra_ptr - name); > > - /* > - * We still have characters to process, while > - * we shouldn't have any > - */ > - if (remaining > 0) > - return false; > + ret = drm_mode_parse_cmdline_extra(extra_ptr, len, > + connector, mode); > + if (ret) > + return false; > + } else { > + int remaining = strlen(name) - (extra_ptr - name); > + > + /* > + * We still have characters to process, while > + * we shouldn't have any > + */ > + if (remaining > 0) > + return false; > + } > } > > return true; > diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h > index 02a131202add..06aa3b9cb920 100644 > --- a/include/drm/drm_connector.h > +++ b/include/drm/drm_connector.h > @@ -896,6 +896,7 @@ struct drm_connector_funcs { > > /* mode specified on the command line */ > struct drm_cmdline_mode { > + char name[DRM_DISPLAY_MODE_LEN]; > bool specified; > bool refresh_specified; > bool bpp_specified; >
diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c index 2a428ac00930..f2869c82510c 100644 --- a/drivers/gpu/drm/drm_client_modeset.c +++ b/drivers/gpu/drm/drm_client_modeset.c @@ -149,6 +149,10 @@ drm_connector_pick_cmdline_mode(struct drm_connector *connector) prefer_non_interlace = !cmdline_mode->interlace; again: list_for_each_entry(mode, &connector->modes, head) { + /* Check (optional) mode name first */ + if (!strcmp(mode->name, cmdline_mode->name)) + return mode; + /* check width/height */ if (mode->hdisplay != cmdline_mode->xres || mode->vdisplay != cmdline_mode->yres) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 2355124849db..e33814f5940e 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -139,8 +139,9 @@ static void drm_connector_get_cmdline_mode(struct drm_connector *connector) connector->force = mode->force; } - DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n", + DRM_DEBUG_KMS("cmdline mode for connector %s %s %dx%d@%dHz%s%s%s\n", connector->name, + mode->name ? mode->name : "", mode->xres, mode->yres, mode->refresh_specified ? mode->refresh : 60, mode->rb ? " reduced blanking" : "", diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 3f89198f0891..9613c1a28487 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1557,7 +1557,7 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, struct drm_cmdline_mode *mode) { const char *name; - bool parse_extras = false; + bool named_mode = false, parse_extras = false; unsigned int bpp_off = 0, refresh_off = 0; unsigned int mode_end = 0; char *bpp_ptr = NULL, *refresh_ptr = NULL, *extra_ptr = NULL; @@ -1576,8 +1576,14 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, name = mode_option; + /* + * If the first character is not a digit, then it means that + * we have a named mode. + */ if (!isdigit(name[0])) - return false; + named_mode = true; + else + named_mode = false; /* Try to locate the bpp and refresh specifiers, if any */ bpp_ptr = strchr(name, '-'); @@ -1588,6 +1594,9 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, refresh_ptr = strchr(name, '@'); if (refresh_ptr) { + if (named_mode) + return false; + refresh_off = refresh_ptr - name; mode->refresh_specified = true; } @@ -1604,12 +1613,16 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, parse_extras = true; } - ret = drm_mode_parse_cmdline_res_mode(name, mode_end, - parse_extras, - connector, - mode); - if (ret) - return false; + if (named_mode) { + strncpy(mode->name, name, mode_end); + } else { + ret = drm_mode_parse_cmdline_res_mode(name, mode_end, + parse_extras, + connector, + mode); + if (ret) + return false; + } mode->specified = true; if (bpp_ptr) { @@ -1637,14 +1650,23 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option, extra_ptr = refresh_end_ptr; if (extra_ptr) { - int remaining = strlen(name) - (extra_ptr - name); + if (!named_mode) { + int len = strlen(name) - (extra_ptr - name); - /* - * We still have characters to process, while - * we shouldn't have any - */ - if (remaining > 0) - return false; + ret = drm_mode_parse_cmdline_extra(extra_ptr, len, + connector, mode); + if (ret) + return false; + } else { + int remaining = strlen(name) - (extra_ptr - name); + + /* + * We still have characters to process, while + * we shouldn't have any + */ + if (remaining > 0) + return false; + } } return true; diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 02a131202add..06aa3b9cb920 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -896,6 +896,7 @@ struct drm_connector_funcs { /* mode specified on the command line */ struct drm_cmdline_mode { + char name[DRM_DISPLAY_MODE_LEN]; bool specified; bool refresh_specified; bool bpp_specified;