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Commit 6efb0ffe authored by Manu Abraham's avatar Manu Abraham Committed by Mauro Carvalho Chehab
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V4L/DVB (9421): We must wait for the PLL to stabilize 



Thanks to Peter for the in depth explanation

Signed-off-by: default avatarManu Abraham <manu@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 417dd69d

drivers/media/dvb/ttpci/budget-ci.c

+23 −0
Original line number Original line Diff line number Diff line
@@ -1768,6 +1768,29 @@ static void frontend_init(struct budget_ci *budget_ci) 
		break;

		break;





	case 0x1019:		// TT S2-3200 PCI

	case 0x1019:		// TT S2-3200 PCI

		/*

		 * NOTE! on some STB0899 versions, the internal PLL takes a longer time

		 * to settle, aka LOCK. On the older revisions of the chip, we don't see

		 * this, as a result on the newer chips the entire clock tree, will not

		 * be stable after a freshly POWER 'ed up situation.

		 * In this case, we should RESET the STB0899 (Active LOW) and wait for

		 * PLL stabilization.

		 *

		 * On the TT S2 3200 and clones, the STB0899 demodulator's RESETB is

		 * connected to the SAA7146 GPIO, GPIO2, Pin 142

		 */

		/* Reset Demodulator */

		saa7146_setgpio(budget->dev, 2, SAA7146_GPIO_OUTLO);

		/* Wait for everything to die */

		msleep(50);

		/* Pull it up out of Reset state */

		saa7146_setgpio(budget->dev, 2, SAA7146_GPIO_OUTHI);

		/* Wait for PLL to stabilize */

		msleep(250);

		/*

		 * PLL state should be stable now. Ideally, we should check

		 * for PLL LOCK status. But well, never mind!

		 */

		budget_ci->budget.dvb_frontend = dvb_attach(stb0899_attach, &tt3200_config, &budget_ci->budget.i2c_adap);

		budget_ci->budget.dvb_frontend = dvb_attach(stb0899_attach, &tt3200_config, &budget_ci->budget.i2c_adap);

		if (budget_ci->budget.dvb_frontend) {

		if (budget_ci->budget.dvb_frontend) {

			if (dvb_attach(stb6100_attach, budget_ci->budget.dvb_frontend, &tt3200_stb6100_config, &budget_ci->budget.i2c_adap)) {

			if (dvb_attach(stb6100_attach, budget_ci->budget.dvb_frontend, &tt3200_stb6100_config, &budget_ci->budget.i2c_adap)) {