From patchwork Mon May 26 09:28:08 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: archit taneja X-Patchwork-Id: 4240851 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7ACAA9F32B for ; Mon, 26 May 2014 09:29:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 777C420170 for ; Mon, 26 May 2014 09:29:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 92C1320172 for ; Mon, 26 May 2014 09:29:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751800AbaEZJ3g (ORCPT ); Mon, 26 May 2014 05:29:36 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:60000 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751772AbaEZJ3g (ORCPT ); Mon, 26 May 2014 05:29:36 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id s4Q9TZRI024826 for ; Mon, 26 May 2014 04:29:35 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s4Q9TZ1c014371 for ; Mon, 26 May 2014 04:29:35 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.174.1; Mon, 26 May 2014 04:29:35 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s4Q9TZjq012645; Mon, 26 May 2014 04:29:35 -0500 Received: from localhost (a0393947pc.apr.dhcp.ti.com [172.24.145.166]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id s4Q9TYt12311; Mon, 26 May 2014 04:29:34 -0500 (CDT) From: Archit Taneja To: CC: , Archit Taneja Subject: [RFC v2 1/5] OMAPDSS: DSS: init dss ports cleanly Date: Mon, 26 May 2014 14:58:08 +0530 Message-ID: <1401096492-1405-1-git-send-email-archit@ti.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1399540517-17883-1-git-send-email-archit@ti.com> References: <1399540517-17883-1-git-send-email-archit@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The init/uninit port functions are used to set up the DPI and SDI outputs under the dss platform device. A 'reg' property is used to determine whether the node is DPI or SDI for OMAP34xx DSS revision. For other DSS revisions, only DPI output exists. For multiple DPI output instances(introduced in DRA7xx DSS), we would use the 'reg' property in dts to specify the DPI output instance. The current functions work fine if there is only one DPI output instance in DSS. For multiple DPI instances, it would get complicated to figure out whether 'reg' is used to specify whether the output is SDI, or another DPI instance. We create a list of port types supported for each DSS rev, with the index of the port in the list matching the reg id. This allows us to have a more generic way to init/uninit ports within DSS, and support multiple DPI ports. Also, make the uninit_port functions iterative since we will have multiple DPI ports to uninit in the future. Signed-off-by: Archit Taneja --- drivers/video/fbdev/omap2/dss/dpi.c | 2 +- drivers/video/fbdev/omap2/dss/dss.c | 84 ++++++++++++++++++++++++++++++------- drivers/video/fbdev/omap2/dss/dss.h | 27 +++++++++++- drivers/video/fbdev/omap2/dss/sdi.c | 2 +- 4 files changed, 97 insertions(+), 18 deletions(-) diff --git a/drivers/video/fbdev/omap2/dss/dpi.c b/drivers/video/fbdev/omap2/dss/dpi.c index 9368972..8593567 100644 --- a/drivers/video/fbdev/omap2/dss/dpi.c +++ b/drivers/video/fbdev/omap2/dss/dpi.c @@ -769,7 +769,7 @@ err_datalines: return r; } -void __exit dpi_uninit_port(void) +void __exit dpi_uninit_port(struct device_node *port) { if (!dpi.port_initialized) return; diff --git a/drivers/video/fbdev/omap2/dss/dss.c b/drivers/video/fbdev/omap2/dss/dss.c index 6daeb7e..54a84f4 100644 --- a/drivers/video/fbdev/omap2/dss/dss.c +++ b/drivers/video/fbdev/omap2/dss/dss.c @@ -70,6 +70,8 @@ struct dss_features { u8 fck_div_max; u8 dss_fck_multiplier; const char *parent_clk_name; + enum omap_display_type *ports; + int num_ports; int (*dpi_select_source)(enum omap_channel channel); }; @@ -689,6 +691,22 @@ void dss_debug_dump_clocks(struct seq_file *s) } #endif + +static enum omap_display_type omap2plus_ports[] = { +#ifdef CONFIG_OMAP2_DSS_DPI + OMAP_DISPLAY_TYPE_DPI, +#endif +}; + +static enum omap_display_type omap34xx_ports[] = { +#ifdef CONFIG_OMAP2_DSS_DPI + OMAP_DISPLAY_TYPE_DPI, +#endif +#ifdef CONFIG_OMAP2_DSS_DSI + OMAP_DISPLAY_TYPE_SDI, +#endif +}; + static const struct dss_features omap24xx_dss_feats __initconst = { /* * fck div max is really 16, but the divider range has gaps. The range @@ -698,6 +716,8 @@ static const struct dss_features omap24xx_dss_feats __initconst = { .dss_fck_multiplier = 2, .parent_clk_name = "core_ck", .dpi_select_source = &dss_dpi_select_source_omap2_omap3, + .ports = omap2plus_ports, + .num_ports = ARRAY_SIZE(omap2plus_ports), }; static const struct dss_features omap34xx_dss_feats __initconst = { @@ -705,6 +725,8 @@ static const struct dss_features omap34xx_dss_feats __initconst = { .dss_fck_multiplier = 2, .parent_clk_name = "dpll4_ck", .dpi_select_source = &dss_dpi_select_source_omap2_omap3, + .ports = omap34xx_ports, + .num_ports = ARRAY_SIZE(omap34xx_ports), }; static const struct dss_features omap3630_dss_feats __initconst = { @@ -712,6 +734,8 @@ static const struct dss_features omap3630_dss_feats __initconst = { .dss_fck_multiplier = 1, .parent_clk_name = "dpll4_ck", .dpi_select_source = &dss_dpi_select_source_omap2_omap3, + .ports = omap2plus_ports, + .num_ports = ARRAY_SIZE(omap2plus_ports), }; static const struct dss_features omap44xx_dss_feats __initconst = { @@ -719,6 +743,8 @@ static const struct dss_features omap44xx_dss_feats __initconst = { .dss_fck_multiplier = 1, .parent_clk_name = "dpll_per_x2_ck", .dpi_select_source = &dss_dpi_select_source_omap4, + .ports = omap2plus_ports, + .num_ports = ARRAY_SIZE(omap2plus_ports), }; static const struct dss_features omap54xx_dss_feats __initconst = { @@ -726,6 +752,8 @@ static const struct dss_features omap54xx_dss_feats __initconst = { .dss_fck_multiplier = 1, .parent_clk_name = "dpll_per_x2_ck", .dpi_select_source = &dss_dpi_select_source_omap5, + .ports = omap2plus_ports, + .num_ports = ARRAY_SIZE(omap2plus_ports), }; static const struct dss_features am43xx_dss_feats __initconst = { @@ -733,6 +761,8 @@ static const struct dss_features am43xx_dss_feats __initconst = { .dss_fck_multiplier = 0, .parent_clk_name = NULL, .dpi_select_source = &dss_dpi_select_source_omap2_omap3, + .ports = omap2plus_ports, + .num_ports = ARRAY_SIZE(omap2plus_ports), }; static int __init dss_init_features(struct platform_device *pdev) @@ -798,6 +828,9 @@ static int __init dss_init_ports(struct platform_device *pdev) if (!port) return 0; + if (dss.feat->num_ports == 0) + return 0; + do { u32 reg; @@ -805,30 +838,53 @@ static int __init dss_init_ports(struct platform_device *pdev) if (r) reg = 0; -#ifdef CONFIG_OMAP2_DSS_DPI - if (reg == 0) + if (reg > dss.feat->num_ports - 1) + continue; + + if (dss.feat->ports[reg] == OMAP_DISPLAY_TYPE_DPI) dpi_init_port(pdev, port); -#endif -#ifdef CONFIG_OMAP2_DSS_SDI - if (reg == 1) + if (dss.feat->ports[reg] == OMAP_DISPLAY_TYPE_SDI) sdi_init_port(pdev, port); -#endif } while ((port = omapdss_of_get_next_port(parent, port)) != NULL); return 0; } -static void __exit dss_uninit_ports(void) +static void __exit dss_uninit_ports(struct platform_device *pdev) { -#ifdef CONFIG_OMAP2_DSS_DPI - dpi_uninit_port(); -#endif + struct device_node *parent = pdev->dev.of_node; + struct device_node *port; + int r; -#ifdef CONFIG_OMAP2_DSS_SDI - sdi_uninit_port(); -#endif + if (parent == NULL) + return; + + port = omapdss_of_get_next_port(parent, NULL); + if (!port) + return; + + if (dss.feat->num_ports == 0) + return; + + do { + u32 reg; + + r = of_property_read_u32(port, "reg", ®); + if (r) + reg = 0; + + if (reg > dss.feat->num_ports - 1) + continue; + + if (dss.feat->ports[reg] == OMAP_DISPLAY_TYPE_DPI) + dpi_uninit_port(port); + + if (dss.feat->ports[reg] == OMAP_DISPLAY_TYPE_SDI) + sdi_uninit_port(port); + + } while ((port = omapdss_of_get_next_port(parent, port)) != NULL); } /* DSS HW IP initialisation */ @@ -910,7 +966,7 @@ err_setup_clocks: static int __exit omap_dsshw_remove(struct platform_device *pdev) { - dss_uninit_ports(); + dss_uninit_ports(pdev); pm_runtime_disable(&pdev->dev); diff --git a/drivers/video/fbdev/omap2/dss/dss.h b/drivers/video/fbdev/omap2/dss/dss.h index 8ff22c1..c91f5bd 100644 --- a/drivers/video/fbdev/omap2/dss/dss.h +++ b/drivers/video/fbdev/omap2/dss/dss.h @@ -244,8 +244,19 @@ bool dss_div_calc(unsigned long pck, unsigned long fck_min, int sdi_init_platform_driver(void) __init; void sdi_uninit_platform_driver(void) __exit; +#ifdef CONFIG_OMAP2_DSS_SDI int sdi_init_port(struct platform_device *pdev, struct device_node *port) __init; -void sdi_uninit_port(void) __exit; +void sdi_uninit_port(struct device_node *port) __exit; +#else +static inline int __init sdi_init_port(struct platform_device *pdev, + struct device_node *port) +{ + return 0; +} +static inline void __exit sdi_uninit_port(struct device_node *port) +{ +} +#endif /* DSI */ @@ -358,8 +369,20 @@ static inline bool dsi_pll_calc(struct platform_device *dsidev, int dpi_init_platform_driver(void) __init; void dpi_uninit_platform_driver(void) __exit; +#ifdef CONFIG_OMAP2_DSS_DPI int dpi_init_port(struct platform_device *pdev, struct device_node *port) __init; -void dpi_uninit_port(void) __exit; +void dpi_uninit_port(struct device_node *port) __exit; +#else +static inline int __init dpi_init_port(struct platform_device *pdev, + struct device_node *port) +{ + return 0; +} +static inline void __exit dpi_uninit_port(struct device_node *port) +{ +} +#endif + /* DISPC */ int dispc_init_platform_driver(void) __init; diff --git a/drivers/video/fbdev/omap2/dss/sdi.c b/drivers/video/fbdev/omap2/dss/sdi.c index 911dcc9..72f89db 100644 --- a/drivers/video/fbdev/omap2/dss/sdi.c +++ b/drivers/video/fbdev/omap2/dss/sdi.c @@ -424,7 +424,7 @@ err_datapairs: return r; } -void __exit sdi_uninit_port(void) +void __exit sdi_uninit_port(struct device_node *port) { if (!sdi.port_initialized) return;