Attachment 30277 Details for Bug 24282 – try to read the first 256bytes from SDVO SPD ROM

[patch] try to read the first 256bytes from SDVO SPD ROM

sdvo_spd.patch (text/plain), 1.78 KB, created by ykzhao on 2009-10-11 20:56:47 UTC

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Creator: ykzhao

Created: 2009-10-11 20:56:47 UTC

Size: 1.78 KB

patch

obsolete

>Try to read the first 256 bytes from the SDVO SPD ROM.
>---
> drivers/gpu/drm/i915/intel_sdvo.c |   42 ++++++++++++++++++++++++++++++++++++--
> 1 file changed, 40 insertions(+), 2 deletions(-)
>
>Index: linux-2.6.32-rc3/drivers/gpu/drm/i915/intel_sdvo.c
>===================================================================
>--- linux-2.6.32-rc3.orig/drivers/gpu/drm/i915/intel_sdvo.c	2009-10-09 17:43:14.000000000 +0800
>+++ linux-2.6.32-rc3/drivers/gpu/drm/i915/intel_sdvo.c	2009-10-12 11:51:38.000000000 +0800
>@@ -47,7 +47,7 @@
> 	"SECAM_K"  , "SECAM_K1", "SECAM_L" ,
> 	"SECAM_60"
> };
>-
>+u8 spd_buffer[256];
> #define TV_FORMAT_NUM  (sizeof(tv_format_names) / sizeof(*tv_format_names))
> 
> struct intel_sdvo_priv {
>@@ -2666,6 +2666,19 @@
> 	return;
> }
> 
>+static void sdvo_print_spd()
>+{
>+	int i;
>+	printk(KERN_DEBUG "SPD ROM");
>+	for (i = 0; i < 256; i++) {
>+		if (i % 16 ==0)
>+			printk("\n\t%x, ", spd_buffer[i]);
>+		else
>+			printk("%x ", spd_buffer[i]);
>+	}
>+	printk(KERN_DEBUG "\nEnd SPD ROM\n");
>+	return;
>+}
> bool intel_sdvo_init(struct drm_device *dev, int output_device)
> {
> 	struct drm_connector *connector;
>@@ -2708,7 +2721,32 @@
> 			goto err_i2c;
> 		}
> 	}
>-
>+	if (output_device == SDVOB)
>+	{
>+		u8 out_buf;
>+		struct i2c_msg temp_msgs[] = {
>+			{
>+			.addr = DDC_ADDR,
>+			.flags = 0,
>+			.len = 1,
>+			.buf = &out_buf,
>+			},
>+			{
>+			.addr = DDC_ADDR,
>+			.flags = I2C_M_RD,
>+			.len = 256,
>+			.buf = spd_buffer,
>+			},
>+		};
>+		out_buf = 0;
>+		/* switch to SPD DDC */
>+		intel_sdvo_set_control_bus_switch(intel_output, 1);
>+		if (i2c_transfer(intel_output->i2c_bus, temp_msgs, 2) == 2) {
>+			sdvo_print_spd();
>+		} else {
>+			printk(KERN_DEBUG "Can't read the SDVO SPD ROM\n");
>+		}
>+	}
> 	/* setup the DDC bus. */
> 	if (output_device == SDVOB) {
> 		intel_output->ddc_bus = intel_i2c_create(dev, GPIOE, "SDVOB DDC BUS");

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Attachments on bug 24282: 30001 | 30002 | 30192 | 30229 | 30250 | 30251 | 30277 | 30305 | 30356 | 30357 | 30370 | 30416 | 30417 | 30476 | 30590 | 30610

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