From bdb736abfad5d61d1004dcc11dae2f7b651e5bb4 Mon Sep 17 00:00:00 2001 From: Archit Taneja Date: Wed, 28 Nov 2012 17:01:39 +0530 Subject: [PATCH] OMAPDSS: Use only "omapdss_dss" platform device to get context lost count When enabling a hwmod, omap_hwmod refers to the register mentioned in the hwmod struct's member 'prcm.omap4.context_offs' to see whether context was lost or not. It increments the context lost count for the hwmod and then clears the register. All the DSS hwmods have the same register(RM_DSS_DSS_CONTEXT) as context_offs. When DSS is enabled, the first hwmod to be enabled is the "dss_core" hwmod since it's corresponding platform device is the parent platform device("omapdss_dss"). The dss_core hwmod updates it's context lost count correctly and clears the register. When the hwmods corresponding to the children platform devices are enabled, they see that the register is clear, and don't increment their context lost count. Therefore, all the children platform devices never report a loss in context. The DISPC driver currently gets the context lost count for DSS power domain from it's corresponding platform device instance("omapdss_dispc"). The DISPC platform device is one of the child devices, and it's corresponding hwmod("dss_dispc") doesn't report the context lost count correctly. Modify dss_get_ctx_loss_count() such that it always takes the "omapdss_dss" platform device as it's input, move the function to dss.c so that it has access to that platform device. Signed-off-by: Archit Taneja Signed-off-by: Tomi Valkeinen --- drivers/video/omap2/dss/core.c | 15 --------------- drivers/video/omap2/dss/dispc.c | 4 ++-- drivers/video/omap2/dss/dss.c | 15 +++++++++++++++ drivers/video/omap2/dss/dss.h | 3 ++- 4 files changed, 19 insertions(+), 18 deletions(-) diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c index 8c308317a19f..5c5e59190586 100644 --- a/drivers/video/omap2/dss/core.c +++ b/drivers/video/omap2/dss/core.c @@ -101,21 +101,6 @@ struct regulator *dss_get_vdds_sdi(void) return reg; } -int dss_get_ctx_loss_count(struct device *dev) -{ - struct omap_dss_board_info *board_data = core.pdev->dev.platform_data; - int cnt; - - if (!board_data->get_context_loss_count) - return -ENOENT; - - cnt = board_data->get_context_loss_count(dev); - - WARN_ONCE(cnt < 0, "get_context_loss_count failed: %d\n", cnt); - - return cnt; -} - int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask) { struct omap_dss_board_info *board_data = core.pdev->dev.platform_data; diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c index ce594a1d860c..f7df52306788 100644 --- a/drivers/video/omap2/dss/dispc.c +++ b/drivers/video/omap2/dss/dispc.c @@ -382,7 +382,7 @@ static void dispc_save_context(void) if (dss_has_feature(FEAT_CORE_CLK_DIV)) SR(DIVISOR); - dispc.ctx_loss_cnt = dss_get_ctx_loss_count(&dispc.pdev->dev); + dispc.ctx_loss_cnt = dss_get_ctx_loss_count(); dispc.ctx_valid = true; DSSDBG("context saved, ctx_loss_count %d\n", dispc.ctx_loss_cnt); @@ -397,7 +397,7 @@ static void dispc_restore_context(void) if (!dispc.ctx_valid) return; - ctx = dss_get_ctx_loss_count(&dispc.pdev->dev); + ctx = dss_get_ctx_loss_count(); if (ctx >= 0 && ctx == dispc.ctx_loss_cnt) return; diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c index 6ca69d55cf57..833f1627dc76 100644 --- a/drivers/video/omap2/dss/dss.c +++ b/drivers/video/omap2/dss/dss.c @@ -154,6 +154,21 @@ static void dss_restore_context(void) #undef SR #undef RR +int dss_get_ctx_loss_count(void) +{ + struct omap_dss_board_info *board_data = dss.pdev->dev.platform_data; + int cnt; + + if (!board_data->get_context_loss_count) + return -ENOENT; + + cnt = board_data->get_context_loss_count(&dss.pdev->dev); + + WARN_ONCE(cnt < 0, "get_context_loss_count failed: %d\n", cnt); + + return cnt; +} + void dss_sdi_init(int datapairs) { u32 l; diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h index 9ee3c881d1c0..4d6f325cee84 100644 --- a/drivers/video/omap2/dss/dss.h +++ b/drivers/video/omap2/dss/dss.h @@ -164,7 +164,6 @@ struct platform_device *dss_get_core_pdev(void); struct bus_type *dss_get_bus(void); struct regulator *dss_get_vdds_dsi(void); struct regulator *dss_get_vdds_sdi(void); -int dss_get_ctx_loss_count(struct device *dev); int dss_dsi_enable_pads(int dsi_id, unsigned lane_mask); void dss_dsi_disable_pads(int dsi_id, unsigned lane_mask); int dss_set_min_bus_tput(struct device *dev, unsigned long tput); @@ -284,6 +283,8 @@ void dss_dump_clocks(struct seq_file *s); void dss_debug_dump_clocks(struct seq_file *s); #endif +int dss_get_ctx_loss_count(void); + void dss_sdi_init(int datapairs); int dss_sdi_enable(void); void dss_sdi_disable(void); -- 2.20.1