> -----Original Message-----
> From: Guruswamy, Senthilvadivu
> Sent: Thursday, June 10, 2010 10:49 AM
> To: linux-omap@vger.kernel.org; t...@atomide.com; tomi.valkei...@nokia.com;
> Hiremath, Vaibhav
> Subject: [RFC] DSS: Movement of base addr, silicon specific data from driver
> to platform_device
>
> Hi,
>
> This RFC is for making DSS drivers not aware of omap versions and
> omap2,3 specific data like base addr, and irqs.
> DSS base address, irqs, and silicon specific data could be placed in
> platform_device.
> This avoids the base address changes in the dss specific drivers like rfbi,
> dsi, sdi.
> Board specific data shall be continued to be maintained in platform_data.
> More details are inlined in the patch with signature [RFC].
> Please provide your comments on this.
>
[Hiremath, Vaibhav] Ideally, this is correct way of sharing the resource. I do
agree that we should take all the platform/device specific resources from
platform_data.
> Files tentatively to be modified are:
> arch/arm/mach-omap2/board-3430sdp.c and all omap board files.
> arch/arm/mach-omap2/devices.c
> arch/arm/plat-omap/include/plat/display.h
> drivers/video/omap2/dss/core.c
> drivers/video/omap2/dss/dispc.c
> drivers/video/omap2/dss/dsi.c and all other dss driver files.
> drivers/video/omap2/dss/dss.c
> drivers/video/omap2/dss/dss.h
>
> Regards,
> Senthil
>
> diff --git a/arch/arm/mach-omap2/board-3430sdp.c b/arch/arm/mach-
> omap2/board-3430sdp.c
> index 540d28f..bfdc5f0
> --- a/arch/arm/mach-omap2/board-3430sdp.c
> +++ b/arch/arm/mach-omap2/board-3430sdp.c
> @@ -536,16 +536,7 @@ static struct omap_dss_board_info sdp3430_dss_data = {
> .default_device = &sdp3430_lcd_device,
> };
>
> -static struct platform_device sdp3430_dss_device = {
> - .name = "omapdss",
> - .id = -1,
> - .dev = {
> - .platform_data = &sdp4430_dss_data,
> - },
> -};
> -
> static struct platform_device *sdp3430_devices[] __initdata = {
> - &sdp3430_dss_device,
> &sdp3430_keypad_device,
> };
> @@ -905,6 +896,7 @@ static void __init omap_3430sdp_init(void)
> platform_add_devices(sdp3430_devices, ARRAY_SIZE(sdp3430_devices));
> omap_serial_init();
> + display_init(&sdp3430_dss_data);
>
> [RFC] Platform device shall be moved to devices.c for definition and
> registration
> of the dss device in the platform bus.
>
> diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
> index 83bd3d6..e481f63
> --- a/arch/arm/mach-omap2/devices.c
> +++ b/arch/arm/mach-omap2/devices.c
> @@ -26,6 +26,7 @@
> #include <plat/mux.h>
> #include <mach/gpio.h>
> #include <plat/mmc.h>
> +#include <plat/display.h>
>
> #include "mux.h"
>
> @@ -790,7 +791,103 @@ static inline void omap_hdq_init(void)
> #else
> static inline void omap_hdq_init(void) {}
> #endif
> +/*-------------------------------------------------------------------------
> --*/
> +#ifdef CONFIG_OMAP2_DSS
> +
> +#define OMAP4_DISPC_BASE 0x58001000
> +#define OMAP2_DISPC_BASE 0x48050400
> +#define OMAP3_DSI_BASE 0x4804FC00
> +#define OMAP4_DSI_BASE 0x58004000
> +#define OMAP4_DSI2_BASE 0x58005000
> +#define OMAP2_DSS_BASE 0x48050000
> +#define OMAP4_DSS_BASE 0x58000000
> +
> +
> [RFC] Move the Base Address macros from the dss driver files to devices.c
> where
> the platform_device is defined. These macros get into resource structure.
> The
> resource strucutre would be a part of platform_device.
>
[Hiremath, Vaibhav] Don't you think this should be part of either omap24xx.h,
omap34xx.h or omap44xx.h.
>
> +
> +static struct platform_device omap_display_dev = {
> + .name = "omapdss",
> + .id = 1,
> + .dev = {
> + .platform_data = NULL, // rename as omapboard_dss_data
> + },
> + .num_resources = 0,
> + .resource = NULL,
> +};
> +
> +
> +static struct resource omap2_dss_resources[] = {
> + {
> + .start = OMAP2_DISPC_BASE,
> + .name = "dispc",
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = OMAP2_DSS_BASE,
> + .name = "dss",
> + .flags = IORESOURCE_MEM,
> + },
> +};
> +static struct resource omap3_dss_resources[] = {
> + {
> + .start = OMAP2_DISPC_BASE,
> + .name = "dispc",
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = OMAP2_DSS_BASE,
> + .name = "dss",
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = OMAP2_DSI_BASE,
> + .name = "dsi",
> + .flags = IORESOURCE_MEM,
> + },
> +};
> +static struct resource omap4_dss_resources[] = {
> + {
> + .start = OMAP4_DISPC_BASE,
> + .name = "dispc",
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = OMAP4_DSS_BASE,
> + .name = "dss",
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = OMAP4_DSI_BASE,
> + .name = "dsi",
> + .flags = IORESOURCE_MEM,
> + },
> + {
> + .start = OMAP4_DSI2_BASE,
> + .name = "dsi2",
> + .flags = IORESOURCE_MEM,
> + },
> +};
> +
>
[Hiremath, Vaibhav] Specify .end to all of these resources so that we do not
need to hardcode the size while mapping.
> +void __init display_init(struct omap_dss_board_info *board_data)
> +{
> + if (cpu_is_omap24xx()) {
> + omap_display_dev.resource = omap2_dss_resources;
> + omap_display_dev.num_resources =
> ARRAY_SIZE(omap2_dss_resources);
> + } else if (cpu_is_omap34xx()) {
> + omap_display_dev.resource = omap3_dss_resources;
> + omap_display_dev.num_resources =
> ARRAY_SIZE(omap3_dss_resources);
> + } else if (cpu_is_omap44xx()) {
> + omap_display_dev.resource = omap4_dss_resources;
> + omap_display_dev.num_resources =
> ARRAY_SIZE(omap4_dss_resources);
> + }
> + omap_display_dev.dev.platform_data = board_data;
> + if (platform_device_register(&omap_display_dev) < 0)
> + printk(KERN_ERR "Unable to register Display device\n");
> +}
> +
> +#else
> +void __init display_init(struct omap_dss_board_info *board_data)
> +{
> +}
> +#endif
> /*-------------------------------------------------------------------------
> --*/
>
> #if defined(CONFIG_VIDEO_OMAP2_VOUT) || \
> diff --git a/arch/arm/plat-omap/include/plat/display.h b/arch/arm/plat-
> omap/include/plat/display.h
> index 5ea4229..80bb135 100644
> --- a/arch/arm/plat-omap/include/plat/display.h
> +++ b/arch/arm/plat-omap/include/plat/display.h
> @@ -24,6 +24,7 @@
> #include <linux/kobject.h>
> #include <linux/device.h>
> #include <asm/atomic.h>
> +#include <linux/platform_device.h>
>
> #define DISPC_IRQ_FRAMEDONE (1 << 0)
> #define DISPC_IRQ_VSYNC (1 << 1)
> @@ -334,6 +335,7 @@ struct omap_dss_board_info {
> struct omap_dss_device **devices;
> struct omap_dss_device *default_device;
> };
> +extern void display_init(struct omap_dss_board_info *board_data);
>
[Hiremath, Vaibhav] Why extern?
I suggest you to submit the actual patches to the list for review.
Thanks,
Vaibhav
> struct omap_video_timings {
> /* Unit: pixels */
> [RFC] Inclusion of platform_device.h in display.h so that all the display
> drivers
> could access it.
>
> diff --git a/drivers/video/omap2/dss/core.c b/drivers/video/omap2/dss/core.c
> index ed9f769..10bb592 100644
> --- a/drivers/video/omap2/dss/core.c
> +++ b/drivers/video/omap2/dss/core.c
>
> @@ -526,14 +526,14 @@ static int omap_dss_probe(struct platform_device
> *pdev)
> skip_init = 1;
> #endif
>
> - r = dss_init(skip_init);
> + r = dss_init(pdev,skip_init);
> if (r) {
> DSSERR("Failed to initialize DSS\n");
> goto fail0;
> }
>
> #ifdef CONFIG_OMAP2_DSS_RFBI
> - r = rfbi_init();
> + r = rfbi_init(pdev);
> if (r) {
> DSSERR("Failed to initialize rfbi\n");
> goto fail0;
> @@ -548,7 +548,7 @@ static int omap_dss_probe(struct platform_device *pdev)
> }
> #endif
>
> - r = dispc_init();
> + r = dispc_init(pdev);
> if (r) {
> DSSERR("Failed to initialize dispc\n");
> goto fail0;
> @@ -562,7 +562,7 @@ static int omap_dss_probe(struct platform_device *pdev)
> #endif
> if (cpu_is_omap34xx()) {
> #ifdef CONFIG_OMAP2_DSS_SDI
> - r = sdi_init(skip_init);
> + r = sdi_init(pdev,skip_init);
> if (r) {
> DSSERR("Failed to initialize SDI\n");
>
> goto fail0;
> [RFC] Each of the driver initialisation take the platform device structure
> in it.
> The corresponding base address, irq info could be extracted based on the
> module name
> from the platform_device structure.
>
> diff --git a/drivers/video/omap2/dss/dispc.c
> b/drivers/video/omap2/dss/dispc.c
> index fc35ffb..35fab95 100644
> --- a/drivers/video/omap2/dss/dispc.c
> +++ b/drivers/video/omap2/dss/dispc.c
> @@ -40,12 +40,6 @@
> #include "dss.h"
>
>
> -#define DISPC_BASE 0x48050400
>
> #define DISPC_SZ_REGS SZ_1K
>
> struct dispc_reg { u16 idx; };
> @@ -4038,9 +4032,12 @@ static void _omap_dispc_initial_config(void)
> dispc_read_plane_fifo_sizes();
> }
>
> -int dispc_init(void)
> +int dispc_init(struct platform_device *pdev)
> {
> u32 rev;
> + struct resource *dispc_res;
> +
> + dispc_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> "dispc");
>
> spin_lock_init(&dispc.irq_lock);
>
> @@ -4051,7 +4048,7 @@ int dispc_init(void)
>
> INIT_WORK(&dispc.error_work, dispc_error_worker);
>
> - dispc_base = dispc.base = ioremap(DISPC_BASE, DISPC_SZ_REGS);
> + dispc_base = dispc.base = ioremap(dispc_res->start, DISPC_SZ_REGS);
> if (!dispc.base) {
> DSSERR("can't ioremap DISPC\n");
> return -ENOMEM;
> diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
> index 178f0fd..95a49c7 100644
> --- a/drivers/video/omap2/dss/dsi.c
> +++ b/drivers/video/omap2/dss/dsi.c
> @@ -42,19 +42,13 @@
> /*#define VERBOSE_IRQ*/
> #define DSI_CATCH_MISSING_TE
>
> -#define DSI_BASE 0x58004000
>
> #define DSI_SZ_REGS SZ_1K
>
> struct dsi_reg { u16 idx; };
>
> #define DSI_REG(idx) ((const struct dsi_reg) { idx })
>
> -#define DSI_SZ_REGS SZ_1K
> +
> /* DSI Protocol Engine */
>
> #define DSI_REVISION DSI_REG(0x0000)
> @@ -3701,6 +3695,9 @@ int dsi_init(struct platform_device *pdev)
> u32 rev;
> int r;
> enum omap_dsi_index ix = DSI1;
> + struct resource *dsi_res;
> +
> + dsi_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dsi");
>
> spin_lock_init(&dsi.errors_lock);
> dsi.errors = 0;
> @@ -3730,7 +3727,7 @@ int dsi_init(struct platform_device *pdev)
> dsi.te_timer.function = dsi_te_timeout;
> dsi.te_timer.data = 0;
> #endif
> - dsi.base = ioremap(DSI_BASE, DSI_SZ_REGS);
> + dsi.base = ioremap(dsi_res->start, DSI_SZ_REGS);
> if (!dsi.base) {
> DSSERR("can't ioremap DSI\n");
> r = -ENOMEM;
> diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
> index db8bc71..958e96b 100644
> --- a/drivers/video/omap2/dss/dss.c
> +++ b/drivers/video/omap2/dss/dss.c
> @@ -33,12 +33,6 @@
> #include <plat/display.h>
> #include "dss.h"
>
> -#define DSS_BASE 0x48050000
> #define DSS_SZ_REGS SZ_512
>
> struct dss_reg {
>
> -int dss_init(bool skip_init)
> +int dss_init(struct platform_device *pdev, bool skip_init)
> {
> int r;
> u32 rev;
> + struct resource *dss_res;
> +
> + dss_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dss");
>
> - dss.base = ioremap(DSS_BASE, DSS_SZ_REGS);
> + dss.base = ioremap(dss_res->start, DSS_SZ_REGS);
> if (!dss.base) {
> DSSERR("can't ioremap DSS\n");
> r = -ENOMEM;
> [RFC] Example of how the base address could be applied on dispc, dsi, sdi.
>
> diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
> index 02cd5ae..636c08a 100644
> --- a/drivers/video/omap2/dss/dss.h
> +++ b/drivers/video/omap2/dss/dss.h
>
> /* DSS */
> -int dss_init(bool skip_init);
> +int dss_init(struct platform_device *pdev, bool skip_init);
> void dss_exit(void);
>
> /* SDI */
> -int sdi_init(bool skip_init);
> +int sdi_init(struct platform_device *pdev, bool skip_init);
> void sdi_exit(void);
> int sdi_init_display(struct omap_dss_device *display);
>
> /* DISPC */
> -int dispc_init(void);
> +int dispc_init(struct platform_device *pdev);
> void dispc_exit(void);
> void dispc_dump_clocks(struct seq_file *s);
> void dispc_dump_irqs(struct seq_file *s);
>
> /* RFBI */
> -int rfbi_init(void);
> +int rfbi_init(struct platform_device *pdev);
> void rfbi_exit(void);
> void rfbi_dump_regs(struct seq_file *s);
>
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