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| author | Laurent Pinchart | 2016-04-18 02:09:48 +0200 |
|---|---|---|
| committer | Laurent Pinchart | 2016-12-19 10:24:58 +0100 |
| commit | 03af8157aac6db1d0a84747dec64b9f5a241ed62 (patch) | |
| tree | 7a4c4e92f829f9d99a09920d0fdd83ce80753260 | |
| parent | drm: omapdrm: Let the DRM core skip plane commit on inactive CRTCs (diff) | |
| download | kernel-qcow2-linux-03af8157aac6db1d0a84747dec64b9f5a241ed62.tar.gz kernel-qcow2-linux-03af8157aac6db1d0a84747dec64b9f5a241ed62.tar.xz kernel-qcow2-linux-03af8157aac6db1d0a84747dec64b9f5a241ed62.zip | |
drm: omapdrm: Check the CRTC software state at enable/disable time
The omapdrm DSS manager enable/disable operations check the DSS manager
state to avoid double enabling/disabling. Check the CRTC software state
instead to decrease the dependency of the DRM layer to the DSS layer.
The dispc_mgr_is_enabled() function then be turned into a static
function, but needs to be moved up in its compilation unit to avoid a
forward declaration.
Add a WARN_ON to catch double enable or disable that should be prevented
by the DRM core and would be a clear sign of a bug. The warning should
eventually be removed.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/dispc.c | 27 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/omapdss.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_crtc.c | 6 |
3 files changed, 16 insertions, 18 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c index c839f6456db2..5554b72cf56a 100644 --- a/drivers/gpu/drm/omapdrm/dss/dispc.c +++ b/drivers/gpu/drm/omapdrm/dss/dispc.c @@ -620,6 +620,19 @@ u32 dispc_wb_get_framedone_irq(void) return DISPC_IRQ_FRAMEDONEWB; } +void dispc_mgr_enable(enum omap_channel channel, bool enable) +{ + mgr_fld_write(channel, DISPC_MGR_FLD_ENABLE, enable); + /* flush posted write */ + mgr_fld_read(channel, DISPC_MGR_FLD_ENABLE); +} +EXPORT_SYMBOL(dispc_mgr_enable); + +static bool dispc_mgr_is_enabled(enum omap_channel channel) +{ + return !!mgr_fld_read(channel, DISPC_MGR_FLD_ENABLE); +} + bool dispc_mgr_go_busy(enum omap_channel channel) { return mgr_fld_read(channel, DISPC_MGR_FLD_GO) == 1; @@ -2901,20 +2914,6 @@ enum omap_dss_output_id dispc_mgr_get_supported_outputs(enum omap_channel channe } EXPORT_SYMBOL(dispc_mgr_get_supported_outputs); -void dispc_mgr_enable(enum omap_channel channel, bool enable) -{ - mgr_fld_write(channel, DISPC_MGR_FLD_ENABLE, enable); - /* flush posted write */ - mgr_fld_read(channel, DISPC_MGR_FLD_ENABLE); -} -EXPORT_SYMBOL(dispc_mgr_enable); - -bool dispc_mgr_is_enabled(enum omap_channel channel) -{ - return !!mgr_fld_read(channel, DISPC_MGR_FLD_ENABLE); -} -EXPORT_SYMBOL(dispc_mgr_is_enabled); - void dispc_wb_enable(bool enable) { dispc_ovl_enable(OMAP_DSS_WB, enable); diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h index b420dde8c0fb..5b3b961127bd 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h @@ -856,7 +856,6 @@ int dispc_runtime_get(void); void dispc_runtime_put(void); void dispc_mgr_enable(enum omap_channel channel, bool enable); -bool dispc_mgr_is_enabled(enum omap_channel channel); u32 dispc_mgr_get_vsync_irq(enum omap_channel channel); u32 dispc_mgr_get_framedone_irq(enum omap_channel channel); u32 dispc_mgr_get_sync_lost_irq(enum omap_channel channel); diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c index 2832dbffd873..a0511cd5d380 100644 --- a/drivers/gpu/drm/omapdrm/omap_crtc.c +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c @@ -135,15 +135,15 @@ static void omap_crtc_set_enabled(struct drm_crtc *crtc, bool enable) u32 framedone_irq, vsync_irq; int ret; + if (WARN_ON(omap_crtc->enabled == enable)) + return; + if (omap_crtc_output[channel]->output_type == OMAP_DISPLAY_TYPE_HDMI) { dispc_mgr_enable(channel, enable); omap_crtc->enabled = enable; return; } - if (dispc_mgr_is_enabled(channel) == enable) - return; - if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) { /* * Digit output produces some sync lost interrupts during the |