[Intel-gfx] [PATCH V2] drm/i915: Implement Displayport automated testing

[Todd Previte]

Ignore this message. Will resend to appropriate thread.

-T

On 10/4/13 12:46 PM, Todd Previte wrote:
> This initial patch adds support for automated testing of the source device
> to the i915 driver. Most of this patch is infrastructure for the tests;
> follow up patches will add support for the individual tests with updates
> to ACK the tests that are supported (or NAK if the test
> fails/is unsupported).
>
> Signed-off-by: Todd Previte <tprevite at gmail.com>
> ---
>   drivers/gpu/drm/i915/intel_dp.c | 75 +++++++++++++++++++++++++++++++++++++++--
>   1 file changed, 72 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 9770160..1f97a1c 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -2730,11 +2730,80 @@ intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector)
>   	return true;
>   }
>   
> +/* Automated test function hook - description forthcoming */
> +static bool
> +intel_dp_autotest_link_training(struct intel_dp *intel_dp)
> +{
> +	bool test_result = false;
> +	return test_result;
> +}
> +
> +/* Automated test function hook - description forthcoming */
> +static bool
> +intel_dp_autotest_video_pattern(struct intel_dp *intel_dp)
> +{
> +	bool test_result = false;
> +	return test_result;
> +}
> +
> +/* Automated test function hook - description forthcoming */
> +static bool
> +intel_dp_autotest_edid(struct intel_dp *intel_dp)
> +{
> +	bool test_result = false;
> +	return test_result;
> +}
> +
> +/* Automated test function hook - description forthcoming */
> +static bool
> +intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
> +{
> +	bool test_result = false;
> +	return test_result;
> +}
> +
>   static void
>   intel_dp_handle_test_request(struct intel_dp *intel_dp)
> -{
> -	/* NAK by default */
> -	intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_NAK);
> +{	
> +	uint8_t response = DP_TEST_NAK;
> +	bool result = false;
> +	uint8_t rxdata = 0;
> +
> +	printk(KERN_DEBUG "Displayport: Recvd automated test request\n");
> +	/* Read DP_TEST_REQUEST register to identify the requested test */
> +	intel_dp_aux_native_read_retry(intel_dp, DP_TEST_REQUEST, &rxdata, 1);
> +	/* Determine which test has been requested */
> +	switch (rxdata) {
> +		/* ACK/NAK response based on the success or failure of the specified
> +		   automated test function. Unimplemented tests will NAK as will those
> +		   that are unsupported. */
> +		case DP_TEST_LINK_TRAINING:
> +			printk(KERN_DEBUG "Displayport: Executing LINK_TRAINING request\n");
> +			result = intel_dp_autotest_link_training(intel_dp);
> +			break;
> +		case DP_TEST_LINK_PATTERN:
> +			printk(KERN_DEBUG "Displayport: Executing TEST_PATTERN request\n");
> +			result = intel_dp_autotest_video_pattern(intel_dp);
> +			break;
> +		case DP_TEST_LINK_EDID_READ:
> +			printk(KERN_DEBUG "Displayport: Executing EDID request\n");
> +			result = intel_dp_autotest_edid(intel_dp);
> +			break;
> +		case DP_TEST_LINK_PHY_TEST_PATTERN:
> +			printk(KERN_DEBUG "Displayport: Executing PHY_PATTERN request\n");
> +			result = intel_dp_autotest_phy_pattern(intel_dp);
> +			break;
> +		/* Unsupported test case or something went wrong */
> +		default:
> +			/* Log error here for unhandled test request */
> +			printk(KERN_DEBUG "Displayport: Error - unhandled automated test type\n");
> +			break;
> +	}
> +	/* Check for a valid test execution */
> +	if (result == true)
> +		response = DP_TEST_ACK;
> +	/* Send ACK/NAK based on action taken above */
> +	intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, response);
>   }
>   
>   /*