[PATCHv3 0/5] OMAP DSS HWMOD fixes

[PATCHv3 0/5] OMAP DSS HWMOD fixes

[Paul Walmsley]

Just ensuring that this series is copied to lakml.  The fifth patch has
been revised slightly from Tomi's original posting.  This series is targeted
for 3.1-rc.


- Paul

Date: Mon, 8 Aug 2011 12:15:09 +0300
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: paul at pwsan.com, linux-omap at vger.kernel.org, b-cousson at ti.com
Cc: archit at ti.com, Tomi Valkeinen <tomi.valkeinen@ti.com>
Subject: [PATCHv2 0/5] OMAP DSS HWMOD fixes

Second try with the DSS HWMODs

This set fixes the DSS clocks in HWMOD data, and implements a new reset
mechanism for dss_core.

The new dss_reset function doesn't actually do a reset, it just enables all DSS
clocks and waits for the reset to complete. This should be better approach than
actually doing a reset, because:

OMAP4 - dss_core HW doesn't contain a SW reset bit so doing a reset is
impossible. But after power-on we need to enable all DSS clocks and wait for
the power-on reset to complete.

OMAP2/3 - dss_core does have a SW reset bit, but resetting dss_core also resets
all the other DSS modules. This means that the other modules could be left
uninitialized, as the hwmod code handles all modules independently, and in this
case initializes only dss_core's registers. Thus dss_core's reset shouldn't be
used, and we should only verify that the power-on reset has completed.

Tested on OMAP4 and OMAP3.

The first two HWMOD patches (for OMAP2/3) are not changed since v1.

 Tomi

---

Tomi Valkeinen (5):
      OMAP2xxx: HWMOD: fix DSS opt clocks
      OMAP3: HWMOD: fix DSS opt clocks
      OMAP4: HWMOD: fix DSS opt clocks
      OMAP2/3: HWMOD: Add SYSS_HAS_RESET_STATUS for dss
      OMAP: HWMOD: Unify DSS resets for all OMAPs


 arch/arm/mach-omap2/Makefile                       |    5 +--
 arch/arm/mach-omap2/display.c                      |   35 ++++++++++++++++++++
 arch/arm/mach-omap2/omap_hwmod_2420_data.c         |   15 +++++++--
 arch/arm/mach-omap2/omap_hwmod_2430_data.c         |   15 +++++++--
 .../mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c |    5 ++-
 arch/arm/mach-omap2/omap_hwmod_3xxx_data.c         |   35 ++++++++++++++++++--
 arch/arm/mach-omap2/omap_hwmod_44xx_data.c         |   18 +++-------
 arch/arm/plat-omap/include/plat/common.h           |    3 ++
 include/video/omapdss.h                            |    7 ----
 9 files changed, 106 insertions(+), 32 deletions(-)

[PATCH 1/5] OMAP2xxx: HWMOD: fix DSS opt clocks

[Paul Walmsley]

From: Tomi Valkeinen <tomi.valkeinen@ti.com>

Set HWMOD_CONTROL_OPT_CLKS_IN_RESET for dss_core to allow DSS reset
properly.

Add missing ick opt-clock for rfbi. Rfbi uses the ick to calculate
timings.

Fix the venc iclk and fclk.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---
 arch/arm/mach-omap2/omap_hwmod_2420_data.c |   15 +++++++++++++--
 arch/arm/mach-omap2/omap_hwmod_2430_data.c |   15 +++++++++++++--
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod_2420_data.c b/arch/arm/mach-omap2/omap_hwmod_2420_data.c
index a015c69..09d9395 100644
--- a/arch/arm/mach-omap2/omap_hwmod_2420_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_2420_data.c
@@ -874,12 +874,17 @@ static struct omap_hwmod_ocp_if *omap2420_dss_slaves[] = {
 };
 
 static struct omap_hwmod_opt_clk dss_opt_clks[] = {
+	/*
+	 * The DSS HW needs all DSS clocks enabled during reset. The dss_core
+	 * driver does not use these clocks.
+	 */
 	{ .role = "tv_clk", .clk = "dss_54m_fck" },
 	{ .role = "sys_clk", .clk = "dss2_fck" },
 };
 
 static struct omap_hwmod omap2420_dss_core_hwmod = {
 	.name		= "dss_core",
+	.flags		= HWMOD_CONTROL_OPT_CLKS_IN_RESET,
 	.class		= &omap2_dss_hwmod_class,
 	.main_clk	= "dss1_fck", /* instead of dss_fck */
 	.sdma_reqs	= omap2xxx_dss_sdma_chs,
@@ -962,6 +967,10 @@ static struct omap_hwmod_ocp_if *omap2420_dss_rfbi_slaves[] = {
 	&omap2420_l4_core__dss_rfbi,
 };
 
+static struct omap_hwmod_opt_clk dss_rfbi_opt_clks[] = {
+	{ .role = "ick", .clk = "dss_ick" },
+};
+
 static struct omap_hwmod omap2420_dss_rfbi_hwmod = {
 	.name		= "dss_rfbi",
 	.class		= &omap2_rfbi_hwmod_class,
@@ -973,6 +982,8 @@ static struct omap_hwmod omap2420_dss_rfbi_hwmod = {
 			.module_offs = CORE_MOD,
 		},
 	},
+	.opt_clks	= dss_rfbi_opt_clks,
+	.opt_clks_cnt	= ARRAY_SIZE(dss_rfbi_opt_clks),
 	.slaves		= omap2420_dss_rfbi_slaves,
 	.slaves_cnt	= ARRAY_SIZE(omap2420_dss_rfbi_slaves),
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP2420),
@@ -983,7 +994,7 @@ static struct omap_hwmod omap2420_dss_rfbi_hwmod = {
 static struct omap_hwmod_ocp_if omap2420_l4_core__dss_venc = {
 	.master		= &omap2420_l4_core_hwmod,
 	.slave		= &omap2420_dss_venc_hwmod,
-	.clk		= "dss_54m_fck",
+	.clk		= "dss_ick",
 	.addr		= omap2_dss_venc_addrs,
 	.fw = {
 		.omap2 = {
@@ -1003,7 +1014,7 @@ static struct omap_hwmod_ocp_if *omap2420_dss_venc_slaves[] = {
 static struct omap_hwmod omap2420_dss_venc_hwmod = {
 	.name		= "dss_venc",
 	.class		= &omap2_venc_hwmod_class,
-	.main_clk	= "dss1_fck",
+	.main_clk	= "dss_54m_fck",
 	.prcm		= {
 		.omap2 = {
 			.prcm_reg_id = 1,
diff --git a/arch/arm/mach-omap2/omap_hwmod_2430_data.c b/arch/arm/mach-omap2/omap_hwmod_2430_data.c
index 16743c7..67aff19 100644
--- a/arch/arm/mach-omap2/omap_hwmod_2430_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_2430_data.c
@@ -940,12 +940,17 @@ static struct omap_hwmod_ocp_if *omap2430_dss_slaves[] = {
 };
 
 static struct omap_hwmod_opt_clk dss_opt_clks[] = {
+	/*
+	 * The DSS HW needs all DSS clocks enabled during reset. The dss_core
+	 * driver does not use these clocks.
+	 */
 	{ .role = "tv_clk", .clk = "dss_54m_fck" },
 	{ .role = "sys_clk", .clk = "dss2_fck" },
 };
 
 static struct omap_hwmod omap2430_dss_core_hwmod = {
 	.name		= "dss_core",
+	.flags		= HWMOD_CONTROL_OPT_CLKS_IN_RESET,
 	.class		= &omap2_dss_hwmod_class,
 	.main_clk	= "dss1_fck", /* instead of dss_fck */
 	.sdma_reqs	= omap2xxx_dss_sdma_chs,
@@ -1016,6 +1021,10 @@ static struct omap_hwmod_ocp_if *omap2430_dss_rfbi_slaves[] = {
 	&omap2430_l4_core__dss_rfbi,
 };
 
+static struct omap_hwmod_opt_clk dss_rfbi_opt_clks[] = {
+	{ .role = "ick", .clk = "dss_ick" },
+};
+
 static struct omap_hwmod omap2430_dss_rfbi_hwmod = {
 	.name		= "dss_rfbi",
 	.class		= &omap2_rfbi_hwmod_class,
@@ -1027,6 +1036,8 @@ static struct omap_hwmod omap2430_dss_rfbi_hwmod = {
 			.module_offs = CORE_MOD,
 		},
 	},
+	.opt_clks	= dss_rfbi_opt_clks,
+	.opt_clks_cnt	= ARRAY_SIZE(dss_rfbi_opt_clks),
 	.slaves		= omap2430_dss_rfbi_slaves,
 	.slaves_cnt	= ARRAY_SIZE(omap2430_dss_rfbi_slaves),
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP2430),
@@ -1037,7 +1048,7 @@ static struct omap_hwmod omap2430_dss_rfbi_hwmod = {
 static struct omap_hwmod_ocp_if omap2430_l4_core__dss_venc = {
 	.master		= &omap2430_l4_core_hwmod,
 	.slave		= &omap2430_dss_venc_hwmod,
-	.clk		= "dss_54m_fck",
+	.clk		= "dss_ick",
 	.addr		= omap2_dss_venc_addrs,
 	.flags		= OCPIF_SWSUP_IDLE,
 	.user		= OCP_USER_MPU | OCP_USER_SDMA,
@@ -1051,7 +1062,7 @@ static struct omap_hwmod_ocp_if *omap2430_dss_venc_slaves[] = {
 static struct omap_hwmod omap2430_dss_venc_hwmod = {
 	.name		= "dss_venc",
 	.class		= &omap2_venc_hwmod_class,
-	.main_clk	= "dss1_fck",
+	.main_clk	= "dss_54m_fck",
 	.prcm		= {
 		.omap2 = {
 			.prcm_reg_id = 1,

[PATCH 1/5] OMAP2xxx: HWMOD: fix DSS opt clocks

[Tony Lindgren]

* Paul Walmsley <paul@pwsan.com> [110821 08:11]:
> From: Tomi Valkeinen <tomi.valkeinen@ti.com>
> 
> Set HWMOD_CONTROL_OPT_CLKS_IN_RESET for dss_core to allow DSS reset
> properly.

Can you please add what this fixes so this can be justified as a fix?
 
> Add missing ick opt-clock for rfbi. Rfbi uses the ick to calculate
> timings.

Here too.
 
> Fix the venc iclk and fclk.

And here.

Regards,

Tony

[PATCH 1/5] OMAP2xxx: HWMOD: fix DSS opt clocks

[Tony Lindgren]

* Tony Lindgren <tony@atomide.com> [110823 09:20]:
> * Paul Walmsley <paul@pwsan.com> [110821 08:11]:
> > From: Tomi Valkeinen <tomi.valkeinen@ti.com>
> > 
> > Set HWMOD_CONTROL_OPT_CLKS_IN_RESET for dss_core to allow DSS reset
> > properly.
> 
> Can you please add what this fixes so this can be justified as a fix?
>  
> > Add missing ick opt-clock for rfbi. Rfbi uses the ick to calculate
> > timings.
> 
> Here too.
>  
> > Fix the venc iclk and fclk.
> 
> And here.

Looks like the comments for the whole series should be improved
so it's clear to everybody what issues these fix and what caused
the breakage.

Tony

[PATCH 1/5] OMAP2xxx: HWMOD: fix DSS opt clocks

[Paul Walmsley]

Hi Tomi,

On Tue, 23 Aug 2011, Tony Lindgren wrote:

> * Paul Walmsley <paul@pwsan.com> [110821 08:11]:
> > From: Tomi Valkeinen <tomi.valkeinen@ti.com>
> > 
> > Set HWMOD_CONTROL_OPT_CLKS_IN_RESET for dss_core to allow DSS reset
> > properly.
> 
> Can you please add what this fixes so this can be justified as a fix?
>  
> > Add missing ick opt-clock for rfbi. Rfbi uses the ick to calculate
> > timings.
> 
> Here too.
>  
> > Fix the venc iclk and fclk.
> 
> And here.

Could you please update the patch changelogs per Tony's request?

thanks,

- Paul

[PATCH 2/5] OMAP3: HWMOD: fix DSS opt clocks

[Paul Walmsley]

From: Tomi Valkeinen <tomi.valkeinen@ti.com>

Set HWMOD_CONTROL_OPT_CLKS_IN_RESET for dss_core to allow DSS reset
properly.

Add missing dss_96m_fck, which is used by venc on OMAP3430.

Add missing ick and sys_clk for dsi.

Add missing ick for rfbi.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---
 arch/arm/mach-omap2/omap_hwmod_3xxx_data.c |   35 +++++++++++++++++++++++++---
 1 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
index 25bf43b..4a02cc3 100644
--- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
@@ -1365,13 +1365,19 @@ static struct omap_hwmod_ocp_if *omap3xxx_dss_slaves[] = {
 };
 
 static struct omap_hwmod_opt_clk dss_opt_clks[] = {
-	{ .role = "tv_clk", .clk = "dss_tv_fck" },
-	{ .role = "video_clk", .clk = "dss_96m_fck" },
+	/*
+	 * The DSS HW needs all DSS clocks enabled during reset. The dss_core
+	 * driver does not use these clocks.
+	 */
 	{ .role = "sys_clk", .clk = "dss2_alwon_fck" },
+	{ .role = "tv_clk", .clk = "dss_tv_fck" },
+	/* required only on OMAP3430 */
+	{ .role = "tv_dac_clk", .clk = "dss_96m_fck" },
 };
 
 static struct omap_hwmod omap3430es1_dss_core_hwmod = {
 	.name		= "dss_core",
+	.flags		= HWMOD_CONTROL_OPT_CLKS_IN_RESET,
 	.class		= &omap2_dss_hwmod_class,
 	.main_clk	= "dss1_alwon_fck", /* instead of dss_fck */
 	.sdma_reqs	= omap3xxx_dss_sdma_chs,
@@ -1396,6 +1402,7 @@ static struct omap_hwmod omap3430es1_dss_core_hwmod = {
 
 static struct omap_hwmod omap3xxx_dss_core_hwmod = {
 	.name		= "dss_core",
+	.flags		= HWMOD_CONTROL_OPT_CLKS_IN_RESET,
 	.class		= &omap2_dss_hwmod_class,
 	.main_clk	= "dss1_alwon_fck", /* instead of dss_fck */
 	.sdma_reqs	= omap3xxx_dss_sdma_chs,
@@ -1488,6 +1495,7 @@ static struct omap_hwmod_addr_space omap3xxx_dss_dsi1_addrs[] = {
 static struct omap_hwmod_ocp_if omap3xxx_l4_core__dss_dsi1 = {
 	.master		= &omap3xxx_l4_core_hwmod,
 	.slave		= &omap3xxx_dss_dsi1_hwmod,
+	.clk		= "dss_ick",
 	.addr		= omap3xxx_dss_dsi1_addrs,
 	.fw = {
 		.omap2 = {
@@ -1504,6 +1512,10 @@ static struct omap_hwmod_ocp_if *omap3xxx_dss_dsi1_slaves[] = {
 	&omap3xxx_l4_core__dss_dsi1,
 };
 
+static struct omap_hwmod_opt_clk dss_dsi1_opt_clks[] = {
+	{ .role = "sys_clk", .clk = "dss2_alwon_fck" },
+};
+
 static struct omap_hwmod omap3xxx_dss_dsi1_hwmod = {
 	.name		= "dss_dsi1",
 	.class		= &omap3xxx_dsi_hwmod_class,
@@ -1516,6 +1528,8 @@ static struct omap_hwmod omap3xxx_dss_dsi1_hwmod = {
 			.module_offs = OMAP3430_DSS_MOD,
 		},
 	},
+	.opt_clks	= dss_dsi1_opt_clks,
+	.opt_clks_cnt	= ARRAY_SIZE(dss_dsi1_opt_clks),
 	.slaves		= omap3xxx_dss_dsi1_slaves,
 	.slaves_cnt	= ARRAY_SIZE(omap3xxx_dss_dsi1_slaves),
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES1 |
@@ -1545,6 +1559,10 @@ static struct omap_hwmod_ocp_if *omap3xxx_dss_rfbi_slaves[] = {
 	&omap3xxx_l4_core__dss_rfbi,
 };
 
+static struct omap_hwmod_opt_clk dss_rfbi_opt_clks[] = {
+	{ .role = "ick", .clk = "dss_ick" },
+};
+
 static struct omap_hwmod omap3xxx_dss_rfbi_hwmod = {
 	.name		= "dss_rfbi",
 	.class		= &omap2_rfbi_hwmod_class,
@@ -1556,6 +1574,8 @@ static struct omap_hwmod omap3xxx_dss_rfbi_hwmod = {
 			.module_offs = OMAP3430_DSS_MOD,
 		},
 	},
+	.opt_clks	= dss_rfbi_opt_clks,
+	.opt_clks_cnt	= ARRAY_SIZE(dss_rfbi_opt_clks),
 	.slaves		= omap3xxx_dss_rfbi_slaves,
 	.slaves_cnt	= ARRAY_SIZE(omap3xxx_dss_rfbi_slaves),
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES1 |
@@ -1568,7 +1588,7 @@ static struct omap_hwmod omap3xxx_dss_rfbi_hwmod = {
 static struct omap_hwmod_ocp_if omap3xxx_l4_core__dss_venc = {
 	.master		= &omap3xxx_l4_core_hwmod,
 	.slave		= &omap3xxx_dss_venc_hwmod,
-	.clk		= "dss_tv_fck",
+	.clk		= "dss_ick",
 	.addr		= omap2_dss_venc_addrs,
 	.fw = {
 		.omap2 = {
@@ -1586,10 +1606,15 @@ static struct omap_hwmod_ocp_if *omap3xxx_dss_venc_slaves[] = {
 	&omap3xxx_l4_core__dss_venc,
 };
 
+static struct omap_hwmod_opt_clk dss_venc_opt_clks[] = {
+	/* required only on OMAP3430 */
+	{ .role = "tv_dac_clk", .clk = "dss_96m_fck" },
+};
+
 static struct omap_hwmod omap3xxx_dss_venc_hwmod = {
 	.name		= "dss_venc",
 	.class		= &omap2_venc_hwmod_class,
-	.main_clk	= "dss1_alwon_fck",
+	.main_clk	= "dss_tv_fck",
 	.prcm		= {
 		.omap2 = {
 			.prcm_reg_id = 1,
@@ -1597,6 +1622,8 @@ static struct omap_hwmod omap3xxx_dss_venc_hwmod = {
 			.module_offs = OMAP3430_DSS_MOD,
 		},
 	},
+	.opt_clks	= dss_venc_opt_clks,
+	.opt_clks_cnt	= ARRAY_SIZE(dss_venc_opt_clks),
 	.slaves		= omap3xxx_dss_venc_slaves,
 	.slaves_cnt	= ARRAY_SIZE(omap3xxx_dss_venc_slaves),
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP3430ES1 |

[PATCH 3/5] OMAP4: HWMOD: fix DSS opt clocks

[Paul Walmsley]

From: Tomi Valkeinen <tomi.valkeinen@ti.com>

Remove the extra dss_dss_clk from dss_core's opt-clocks. dss_dss_clk is
the fck, and thus not an opt-clock.

Add HWMOD_CONTROL_OPT_CLKS_IN_RESET for dss_core so that dss_core's
reset can finish.

Remove the opt clocks for dispc, as they are not needed.

Change the main_clk for hdmi and venc to dss_48mhz_clk and dss_tv_clk,
respectively.

Cc: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---
 arch/arm/mach-omap2/omap_hwmod_44xx_data.c |   16 ++++------------
 1 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index 6201422..8b74058 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -1257,12 +1257,12 @@ static struct omap_hwmod_ocp_if *omap44xx_dss_slaves[] = {
 static struct omap_hwmod_opt_clk dss_opt_clks[] = {
 	{ .role = "sys_clk", .clk = "dss_sys_clk" },
 	{ .role = "tv_clk", .clk = "dss_tv_clk" },
-	{ .role = "dss_clk", .clk = "dss_dss_clk" },
-	{ .role = "video_clk", .clk = "dss_48mhz_clk" },
+	{ .role = "hdmi_clk", .clk = "dss_48mhz_clk" },
 };
 
 static struct omap_hwmod omap44xx_dss_hwmod = {
 	.name		= "dss_core",
+	.flags		= HWMOD_CONTROL_OPT_CLKS_IN_RESET,
 	.class		= &omap44xx_dss_hwmod_class,
 	.clkdm_name	= "l3_dss_clkdm",
 	.main_clk	= "dss_dss_clk",
@@ -1358,12 +1358,6 @@ static struct omap_hwmod_ocp_if *omap44xx_dss_dispc_slaves[] = {
 	&omap44xx_l4_per__dss_dispc,
 };
 
-static struct omap_hwmod_opt_clk dss_dispc_opt_clks[] = {
-	{ .role = "sys_clk", .clk = "dss_sys_clk" },
-	{ .role = "tv_clk", .clk = "dss_tv_clk" },
-	{ .role = "hdmi_clk", .clk = "dss_48mhz_clk" },
-};
-
 static struct omap_hwmod omap44xx_dss_dispc_hwmod = {
 	.name		= "dss_dispc",
 	.class		= &omap44xx_dispc_hwmod_class,
@@ -1377,8 +1371,6 @@ static struct omap_hwmod omap44xx_dss_dispc_hwmod = {
 			.context_offs = OMAP4_RM_DSS_DSS_CONTEXT_OFFSET,
 		},
 	},
-	.opt_clks	= dss_dispc_opt_clks,
-	.opt_clks_cnt	= ARRAY_SIZE(dss_dispc_opt_clks),
 	.slaves		= omap44xx_dss_dispc_slaves,
 	.slaves_cnt	= ARRAY_SIZE(omap44xx_dss_dispc_slaves),
 	.omap_chip	= OMAP_CHIP_INIT(CHIP_IS_OMAP4430),
@@ -1645,7 +1637,7 @@ static struct omap_hwmod omap44xx_dss_hdmi_hwmod = {
 	.clkdm_name	= "l3_dss_clkdm",
 	.mpu_irqs	= omap44xx_dss_hdmi_irqs,
 	.sdma_reqs	= omap44xx_dss_hdmi_sdma_reqs,
-	.main_clk	= "dss_dss_clk",
+	.main_clk	= "dss_48mhz_clk",
 	.prcm = {
 		.omap4 = {
 			.clkctrl_offs = OMAP4_CM_DSS_DSS_CLKCTRL_OFFSET,
@@ -1808,7 +1800,7 @@ static struct omap_hwmod omap44xx_dss_venc_hwmod = {
 	.name		= "dss_venc",
 	.class		= &omap44xx_venc_hwmod_class,
 	.clkdm_name	= "l3_dss_clkdm",
-	.main_clk	= "dss_dss_clk",
+	.main_clk	= "dss_tv_clk",
 	.prcm = {
 		.omap4 = {
 			.clkctrl_offs = OMAP4_CM_DSS_DSS_CLKCTRL_OFFSET,

[PATCH 4/5] OMAP2/3: HWMOD: Add SYSS_HAS_RESET_STATUS for dss

[Paul Walmsley]

From: Tomi Valkeinen <tomi.valkeinen@ti.com>

OMAP2/3 dss_core has a reset status flag in sysstatus register. Add
SYSS_HAS_RESET_STATUS flag to HWMOD data so it can be used.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---
 .../mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c b/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c
index c451729..d78c132 100644
--- a/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c
@@ -43,7 +43,8 @@ static struct omap_hwmod_class_sysconfig omap2_dss_sysc = {
 	.rev_offs	= 0x0000,
 	.sysc_offs	= 0x0010,
 	.syss_offs	= 0x0014,
-	.sysc_flags	= (SYSC_HAS_SOFTRESET | SYSC_HAS_AUTOIDLE),
+	.sysc_flags	= (SYSC_HAS_SOFTRESET | SYSC_HAS_AUTOIDLE |
+			   SYSS_HAS_RESET_STATUS),
 	.sysc_fields	= &omap_hwmod_sysc_type1,
 };
 

[PATCH 5/5] OMAP: HWMOD: Unify DSS resets for all OMAPs

[Paul Walmsley]

From: Tomi Valkeinen <tomi.valkeinen@ti.com>

This patch adds a custom DSS reset function used on all OMAP's.

The function doesn't actually do a reset, it only waits for the reset to
complete. The reason for this is that on OMAP4 there is no possibility
to do a SW reset, and on OMAP2/3 doing a SW reset for dss_core resets
all the other DSS modules also, thus breaking the HWMOD model where
every DSS module is independent.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
[paul at pwsan.com: modified to build arch/arm/mach-omap2/display.o
 unconditionally to avoid an error when !CONFIG_OMAP2_DSS]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
---
 arch/arm/mach-omap2/Makefile                       |    5 +--
 arch/arm/mach-omap2/display.c                      |   35 ++++++++++++++++++++
 .../mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c |    2 +
 arch/arm/mach-omap2/omap_hwmod_44xx_data.c         |    2 +
 arch/arm/plat-omap/include/plat/common.h           |    3 ++
 include/video/omapdss.h                            |    7 ----
 6 files changed, 43 insertions(+), 11 deletions(-)

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index f343365..bf85539 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -4,7 +4,7 @@
 
 # Common support
 obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer.o pm.o \
-	 common.o gpio.o dma.o wd_timer.o
+	 common.o gpio.o dma.o wd_timer.o display.o
 
 omap-2-3-common				= irq.o sdrc.o
 hwmod-common				= omap_hwmod.o \
@@ -276,7 +276,4 @@ smsc911x-$(CONFIG_SMSC911X)		:= gpmc-smsc911x.o
 obj-y					+= $(smsc911x-m) $(smsc911x-y)
 obj-$(CONFIG_ARCH_OMAP4)		+= hwspinlock.o
 
-disp-$(CONFIG_OMAP2_DSS)		:= display.o
-obj-y					+= $(disp-m) $(disp-y)
-
 obj-y					+= common-board-devices.o twl-common.o
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index a5b7a23..cdb675a 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -26,6 +26,7 @@
 #include <plat/omap_hwmod.h>
 #include <plat/omap_device.h>
 #include <plat/omap-pm.h>
+#include <plat/common.h>
 
 static struct platform_device omap_display_device = {
 	.name          = "omapdss",
@@ -126,3 +127,37 @@ int __init omap_display_init(struct omap_dss_board_info *board_data)
 
 	return r;
 }
+
+#define MAX_MODULE_SOFTRESET_WAIT	10000
+int omap_dss_reset(struct omap_hwmod *oh)
+{
+	struct omap_hwmod_opt_clk *oc;
+	int c = 0;
+	int i, r;
+
+	if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) {
+		pr_err("dss_core: hwmod data doesn't contain reset data\n");
+		return -EINVAL;
+	}
+
+	for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
+		if (oc->_clk)
+			clk_enable(oc->_clk);
+
+	omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs)
+				& SYSS_RESETDONE_MASK),
+			MAX_MODULE_SOFTRESET_WAIT, c);
+
+	if (c == MAX_MODULE_SOFTRESET_WAIT)
+		pr_warning("dss_core: waiting for reset to finish failed\n");
+	else
+		pr_debug("dss_core: softreset done\n");
+
+	for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
+		if (oc->_clk)
+			clk_disable(oc->_clk);
+
+	r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0;
+
+	return r;
+}
diff --git a/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c b/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c
index d78c132..c11273d 100644
--- a/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_2xxx_3xxx_ipblock_data.c
@@ -11,6 +11,7 @@
 #include <plat/omap_hwmod.h>
 #include <plat/serial.h>
 #include <plat/dma.h>
+#include <plat/common.h>
 
 #include <mach/irqs.h>
 
@@ -51,6 +52,7 @@ static struct omap_hwmod_class_sysconfig omap2_dss_sysc = {
 struct omap_hwmod_class omap2_dss_hwmod_class = {
 	.name	= "dss",
 	.sysc	= &omap2_dss_sysc,
+	.reset	= omap_dss_reset,
 };
 
 /*
diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index 8b74058..7a7489e 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -29,6 +29,7 @@
 #include <plat/mcbsp.h>
 #include <plat/mmc.h>
 #include <plat/i2c.h>
+#include <plat/common.h>
 
 #include "omap_hwmod_common_data.h"
 
@@ -1204,6 +1205,7 @@ static struct omap_hwmod_class_sysconfig omap44xx_dss_sysc = {
 static struct omap_hwmod_class omap44xx_dss_hwmod_class = {
 	.name	= "dss",
 	.sysc	= &omap44xx_dss_sysc,
+	.reset	= omap_dss_reset,
 };
 
 /* dss */
diff --git a/arch/arm/plat-omap/include/plat/common.h b/arch/arm/plat-omap/include/plat/common.h
index 4564cc6..a822685 100644
--- a/arch/arm/plat-omap/include/plat/common.h
+++ b/arch/arm/plat-omap/include/plat/common.h
@@ -30,6 +30,7 @@
 #include <linux/delay.h>
 
 #include <plat/i2c.h>
+#include <plat/omap_hwmod.h>
 
 struct sys_timer;
 
@@ -45,6 +46,8 @@ extern unsigned long long notrace omap_32k_sched_clock(void);
 
 extern void omap_reserve(void);
 
+extern int omap_dss_reset(struct omap_hwmod *);
+
 /*
  * IO bases for various OMAP processors
  * Except the tap base, rest all the io bases
diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 3b55ef2..105b05d 100644
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -245,15 +245,8 @@ struct omap_dss_board_info {
 	void (*dsi_mux_pads)(bool enable);
 };
 
-#if defined(CONFIG_OMAP2_DSS_MODULE) || defined(CONFIG_OMAP2_DSS)
 /* Init with the board info */
 extern int omap_display_init(struct omap_dss_board_info *board_data);
-#else
-static inline int omap_display_init(struct omap_dss_board_info *board_data)
-{
-	return 0;
-}
-#endif
 
 struct omap_display_platform_data {
 	struct omap_dss_board_info *board_data;