Hi Am 22.03.22 um 16:46 schrieb Patrik Jakobsson:
On Tue, Mar 22, 2022 at 3:39 PM Daniel Vetter <daniel@xxxxxxxx> wrote:On Tue, Mar 22, 2022 at 02:17:38PM +0100, Patrik Jakobsson wrote:This makes sure we're using proper locking when iterating the list of connectors. Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>Note that this is only needed if your driver deals with hotpluggable connectors. Since gma500 doesn't, not really a need to convert this over, but it also doesn't hurt.
I'd fix this if only for copy-pasters to not copy incorrect code. :)
Good point. Not sure but I think there is a slight possibility that Cedarview can support DP MST. If someone adds support for DP MST then this code would make sense. I was never able to exercise the DP code because I couldn't find an eDP cable that fits the Intel DN2800MT (my only device with DP). Do you happen to know what the 40-pin connector is called? Perhaps Intel has some standard for eDP connectors?If the kerneldoc doesn't explain this, maybe we should add it? Care for a patch.I didn't see it being mentioned anywhere. I'll send a patch.Either way on the entire series: Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>Thanks for having a look.I'll leave it up to you whether you want to push this one too or not. -Daniel--- drivers/gpu/drm/gma500/cdv_device.c | 10 ++++++-- drivers/gpu/drm/gma500/cdv_intel_display.c | 9 +++++-- drivers/gpu/drm/gma500/framebuffer.c | 6 +++-- drivers/gpu/drm/gma500/gma_display.c | 16 ++++++++----- drivers/gpu/drm/gma500/oaktrail_crtc.c | 17 ++++++++----- drivers/gpu/drm/gma500/oaktrail_lvds.c | 15 ++++++------ drivers/gpu/drm/gma500/psb_device.c | 28 +++++++++++++++------- drivers/gpu/drm/gma500/psb_drv.c | 10 ++++---- drivers/gpu/drm/gma500/psb_intel_display.c | 15 ++++++++---- 9 files changed, 84 insertions(+), 42 deletions(-) diff --git a/drivers/gpu/drm/gma500/cdv_device.c b/drivers/gpu/drm/gma500/cdv_device.c index f854f58bcbb3..dd32b484dd82 100644 --- a/drivers/gpu/drm/gma500/cdv_device.c +++ b/drivers/gpu/drm/gma500/cdv_device.c @@ -262,6 +262,7 @@ static int cdv_save_display_registers(struct drm_device *dev) struct drm_psb_private *dev_priv = to_drm_psb_private(dev); struct pci_dev *pdev = to_pci_dev(dev->dev); struct psb_save_area *regs = &dev_priv->regs; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; dev_dbg(dev->dev, "Saving GPU registers.\n"); @@ -298,8 +299,10 @@ static int cdv_save_display_registers(struct drm_device *dev) regs->cdv.saveIER = REG_READ(PSB_INT_ENABLE_R); regs->cdv.saveIMR = REG_READ(PSB_INT_MASK_R); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF); + drm_connector_list_iter_end(&conn_iter); return 0; } @@ -317,6 +320,7 @@ static int cdv_restore_display_registers(struct drm_device *dev) struct drm_psb_private *dev_priv = to_drm_psb_private(dev); struct pci_dev *pdev = to_pci_dev(dev->dev); struct psb_save_area *regs = &dev_priv->regs; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; u32 temp; @@ -373,8 +377,10 @@ static int cdv_restore_display_registers(struct drm_device *dev) drm_mode_config_reset(dev); - list_for_each_entry(connector, &dev->mode_config.connector_list, head) + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) connector->funcs->dpms(connector, DRM_MODE_DPMS_ON); + drm_connector_list_iter_end(&conn_iter); /* Resume the modeset for every activated CRTC */ drm_helper_resume_force_mode(dev); diff --git a/drivers/gpu/drm/gma500/cdv_intel_display.c b/drivers/gpu/drm/gma500/cdv_intel_display.c index 94ebc48a4349..0c3ddcdc29dc 100644 --- a/drivers/gpu/drm/gma500/cdv_intel_display.c +++ b/drivers/gpu/drm/gma500/cdv_intel_display.c @@ -584,13 +584,14 @@ static int cdv_intel_crtc_mode_set(struct drm_crtc *crtc, bool ok; bool is_lvds = false; bool is_dp = false; - struct drm_mode_config *mode_config = &dev->mode_config; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; const struct gma_limit_t *limit; u32 ddi_select = 0; bool is_edp = false; - list_for_each_entry(connector, &mode_config->connector_list, head) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { struct gma_encoder *gma_encoder = gma_attached_encoder(connector); @@ -613,10 +614,14 @@ static int cdv_intel_crtc_mode_set(struct drm_crtc *crtc, is_edp = true; break; default: + drm_connector_list_iter_end(&conn_iter); DRM_ERROR("invalid output type.\n"); return 0; } + + break; } + drm_connector_list_iter_end(&conn_iter); if (dev_priv->dplla_96mhz) /* low-end sku, 96/100 mhz */ diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c index 2b99c996fdc2..0ac6ea5fd3a1 100644 --- a/drivers/gpu/drm/gma500/framebuffer.c +++ b/drivers/gpu/drm/gma500/framebuffer.c @@ -451,6 +451,7 @@ static const struct drm_mode_config_funcs psb_mode_funcs = { static void psb_setup_outputs(struct drm_device *dev) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; drm_mode_create_scaling_mode_property(dev); @@ -461,8 +462,8 @@ static void psb_setup_outputs(struct drm_device *dev) "backlight", 0, 100); dev_priv->ops->output_init(dev); - list_for_each_entry(connector, &dev->mode_config.connector_list, - head) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { struct gma_encoder *gma_encoder = gma_attached_encoder(connector); struct drm_encoder *encoder = &gma_encoder->base; int crtc_mask = 0, clone_mask = 0; @@ -505,6 +506,7 @@ static void psb_setup_outputs(struct drm_device *dev) encoder->possible_clones = gma_connector_clones(dev, clone_mask); } + drm_connector_list_iter_end(&conn_iter); } void psb_modeset_init(struct drm_device *dev) diff --git a/drivers/gpu/drm/gma500/gma_display.c b/drivers/gpu/drm/gma500/gma_display.c index 1d7964c339f4..e8157464d9eb 100644 --- a/drivers/gpu/drm/gma500/gma_display.c +++ b/drivers/gpu/drm/gma500/gma_display.c @@ -27,17 +27,21 @@ bool gma_pipe_has_type(struct drm_crtc *crtc, int type) { struct drm_device *dev = crtc->dev; - struct drm_mode_config *mode_config = &dev->mode_config; - struct drm_connector *l_entry; + struct drm_connector_list_iter conn_iter; + struct drm_connector *connector; - list_for_each_entry(l_entry, &mode_config->connector_list, head) { - if (l_entry->encoder && l_entry->encoder->crtc == crtc) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + if (connector->encoder && connector->encoder->crtc == crtc) { struct gma_encoder *gma_encoder = - gma_attached_encoder(l_entry); - if (gma_encoder->type == type) + gma_attached_encoder(connector); + if (gma_encoder->type == type) { + drm_connector_list_iter_end(&conn_iter); return true; + } } } + drm_connector_list_iter_end(&conn_iter); return false; } diff --git a/drivers/gpu/drm/gma500/oaktrail_crtc.c b/drivers/gpu/drm/gma500/oaktrail_crtc.c index 36c7c2686c90..873c17cf8fb4 100644 --- a/drivers/gpu/drm/gma500/oaktrail_crtc.c +++ b/drivers/gpu/drm/gma500/oaktrail_crtc.c @@ -372,9 +372,9 @@ static int oaktrail_crtc_mode_set(struct drm_crtc *crtc, bool ok, is_sdvo = false; bool is_lvds = false; bool is_mipi = false; - struct drm_mode_config *mode_config = &dev->mode_config; struct gma_encoder *gma_encoder = NULL; uint64_t scalingType = DRM_MODE_SCALE_FULLSCREEN; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; int i; int need_aux = gma_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ? 1 : 0; @@ -392,7 +392,8 @@ static int oaktrail_crtc_mode_set(struct drm_crtc *crtc, adjusted_mode, sizeof(struct drm_display_mode)); - list_for_each_entry(connector, &mode_config->connector_list, head) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { if (!connector->encoder || connector->encoder->crtc != crtc) continue; @@ -409,8 +410,16 @@ static int oaktrail_crtc_mode_set(struct drm_crtc *crtc, is_mipi = true; break; } + + break; } + if (gma_encoder) + drm_object_property_get_value(&connector->base, + dev->mode_config.scaling_mode_property, &scalingType); + + drm_connector_list_iter_end(&conn_iter); + /* Disable the VGA plane that we never use */ for (i = 0; i <= need_aux; i++) REG_WRITE_WITH_AUX(VGACNTRL, VGA_DISP_DISABLE, i); @@ -424,10 +433,6 @@ static int oaktrail_crtc_mode_set(struct drm_crtc *crtc, (mode->crtc_vdisplay - 1), i); } - if (gma_encoder) - drm_object_property_get_value(&connector->base, - dev->mode_config.scaling_mode_property, &scalingType); - if (scalingType == DRM_MODE_SCALE_NO_SCALE) { /* Moorestown doesn't have register support for centering so * we need to mess with the h/vblank and h/vsync start and diff --git a/drivers/gpu/drm/gma500/oaktrail_lvds.c b/drivers/gpu/drm/gma500/oaktrail_lvds.c index 28b995ef2844..04852dbc7fb3 100644 --- a/drivers/gpu/drm/gma500/oaktrail_lvds.c +++ b/drivers/gpu/drm/gma500/oaktrail_lvds.c @@ -85,7 +85,7 @@ static void oaktrail_lvds_mode_set(struct drm_encoder *encoder, struct drm_device *dev = encoder->dev; struct drm_psb_private *dev_priv = to_drm_psb_private(dev); struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; - struct drm_mode_config *mode_config = &dev->mode_config; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector = NULL; struct drm_crtc *crtc = encoder->crtc; u32 lvds_port; @@ -112,21 +112,22 @@ static void oaktrail_lvds_mode_set(struct drm_encoder *encoder, REG_WRITE(LVDS, lvds_port); /* Find the connector we're trying to set up */ - list_for_each_entry(connector, &mode_config->connector_list, head) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { if (connector->encoder && connector->encoder->crtc == crtc) break; } - if (list_entry_is_head(connector, &mode_config->connector_list, head)) { + if (!connector) { + drm_connector_list_iter_end(&conn_iter); DRM_ERROR("Couldn't find connector when setting mode"); gma_power_end(dev); return; } - drm_object_property_get_value( - &connector->base, - dev->mode_config.scaling_mode_property, - &v); + drm_object_property_get_value( &connector->base, + dev->mode_config.scaling_mode_property, &v); + drm_connector_list_iter_end(&conn_iter); if (v == DRM_MODE_SCALE_NO_SCALE) REG_WRITE(PFIT_CONTROL, 0); diff --git a/drivers/gpu/drm/gma500/psb_device.c b/drivers/gpu/drm/gma500/psb_device.c index 59f325165667..71534f4ca834 100644 --- a/drivers/gpu/drm/gma500/psb_device.c +++ b/drivers/gpu/drm/gma500/psb_device.c @@ -168,8 +168,10 @@ static void psb_init_pm(struct drm_device *dev) static int psb_save_display_registers(struct drm_device *dev) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); + struct gma_connector *gma_connector; struct drm_crtc *crtc; - struct gma_connector *connector; + struct drm_connector_list_iter conn_iter; + struct drm_connector *connector; struct psb_state *regs = &dev_priv->regs.psb; /* Display arbitration control + watermarks */ @@ -189,9 +191,13 @@ static int psb_save_display_registers(struct drm_device *dev) dev_priv->ops->save_crtc(crtc); } - list_for_each_entry(connector, &dev->mode_config.connector_list, base.head) - if (connector->save) - connector->save(&connector->base); + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + gma_connector = to_gma_connector(connector); + if (gma_connector->save) + gma_connector->save(connector); + } + drm_connector_list_iter_end(&conn_iter); drm_modeset_unlock_all(dev); return 0; @@ -206,8 +212,10 @@ static int psb_save_display_registers(struct drm_device *dev) static int psb_restore_display_registers(struct drm_device *dev) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); + struct gma_connector *gma_connector; struct drm_crtc *crtc; - struct gma_connector *connector; + struct drm_connector_list_iter conn_iter; + struct drm_connector *connector; struct psb_state *regs = &dev_priv->regs.psb; /* Display arbitration + watermarks */ @@ -228,9 +236,13 @@ static int psb_restore_display_registers(struct drm_device *dev) if (drm_helper_crtc_in_use(crtc)) dev_priv->ops->restore_crtc(crtc); - list_for_each_entry(connector, &dev->mode_config.connector_list, base.head) - if (connector->restore) - connector->restore(&connector->base); + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + gma_connector = to_gma_connector(connector); + if (gma_connector->restore) + gma_connector->restore(connector); + } + drm_connector_list_iter_end(&conn_iter); drm_modeset_unlock_all(dev); return 0; diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c index b231fddb8817..bb0e3288e35b 100644 --- a/drivers/gpu/drm/gma500/psb_drv.c +++ b/drivers/gpu/drm/gma500/psb_drv.c @@ -236,10 +236,11 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags) struct drm_psb_private *dev_priv = to_drm_psb_private(dev); unsigned long resource_start, resource_len; unsigned long irqflags; - int ret = -ENOMEM; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; struct gma_encoder *gma_encoder; struct psb_gtt *pg; + int ret = -ENOMEM; /* initializing driver private data */ @@ -390,9 +391,9 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags) psb_fbdev_init(dev); drm_kms_helper_poll_init(dev); - /* Only add backlight support if we have LVDS output */ - list_for_each_entry(connector, &dev->mode_config.connector_list, - head) { + /* Only add backlight support if we have LVDS or MIPI output */ + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { gma_encoder = gma_attached_encoder(connector); switch (gma_encoder->type) { @@ -402,6 +403,7 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags) break; } } + drm_connector_list_iter_end(&conn_iter); if (ret) return ret; diff --git a/drivers/gpu/drm/gma500/psb_intel_display.c b/drivers/gpu/drm/gma500/psb_intel_display.c index a99859b5b13a..fb8234f4d128 100644 --- a/drivers/gpu/drm/gma500/psb_intel_display.c +++ b/drivers/gpu/drm/gma500/psb_intel_display.c @@ -106,7 +106,7 @@ static int psb_intel_crtc_mode_set(struct drm_crtc *crtc, u32 dpll = 0, fp = 0, dspcntr, pipeconf; bool ok, is_sdvo = false; bool is_lvds = false, is_tv = false; - struct drm_mode_config *mode_config = &dev->mode_config; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; const struct gma_limit_t *limit; @@ -116,7 +116,8 @@ static int psb_intel_crtc_mode_set(struct drm_crtc *crtc, return 0; } - list_for_each_entry(connector, &mode_config->connector_list, head) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { struct gma_encoder *gma_encoder = gma_attached_encoder(connector); if (!connector->encoder @@ -135,6 +136,7 @@ static int psb_intel_crtc_mode_set(struct drm_crtc *crtc, break; } } + drm_connector_list_iter_end(&conn_iter); refclk = 96000; @@ -534,16 +536,19 @@ struct drm_crtc *psb_intel_get_crtc_from_pipe(struct drm_device *dev, int pipe) int gma_connector_clones(struct drm_device *dev, int type_mask) { - int index_mask = 0; + struct drm_connector_list_iter conn_iter; struct drm_connector *connector; + int index_mask = 0; int entry = 0; - list_for_each_entry(connector, &dev->mode_config.connector_list, - head) { + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { struct gma_encoder *gma_encoder = gma_attached_encoder(connector); if (type_mask & (1 << gma_encoder->type)) index_mask |= (1 << entry); entry++; } + drm_connector_list_iter_end(&conn_iter); + return index_mask; } -- 2.35.1-- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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