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Commit b6a5cd80 authored by Samantha Tran's avatar Samantha Tran
Browse files

drm/msm/dp: add support for different execution modes 



Add support for switching different execution modes like
hardware mode, software mode or both. In hardware mode,
DP works as normal. In software mode, DP driver works on
IO mapped buffers instead of hardware. This mode can be
used to simulate different variants of hardware.

CRs-Fixed: 2113611
Change-Id: I102b2e37220048d819131bcc4b6d5083499915ee
Signed-off-by: default avatarSamantha Tran <samtran@codeaurora.org>
parent d0edcda0

drivers/gpu/drm/msm/dp/dp_aux.c

+29 −16
Original line number Diff line number Diff line
@@ -50,6 +50,33 @@ struct dp_aux_private { 
	u8 *edid;

};



#ifdef CONFIG_DYNAMIC_DEBUG

static void dp_aux_hex_dump(struct drm_dp_aux *drm_aux,

		struct drm_dp_aux_msg *msg)

{

	DEFINE_DYNAMIC_DEBUG_METADATA(ddm, "dp aux tracker");



	if (unlikely(ddm.flags & _DPRINTK_FLAGS_PRINT)) {

		u8 buf[SZ_64];

		struct dp_aux_private *aux = container_of(drm_aux,

			struct dp_aux_private, drm_aux);



		snprintf(buf, SZ_64, "[drm-dp] %5s %5s %5xh(%2zu): ",

			aux->native ? "NATIVE" : "I2C",

			aux->read ? "READ" : "WRITE",

			msg->address, msg->size);



		print_hex_dump(KERN_DEBUG, buf, DUMP_PREFIX_NONE,

			8, 1, msg->buffer, msg->size, false);

	}

}

#else

static void dp_aux_hex_dump(struct drm_dp_aux *drm_aux,

		struct drm_dp_aux_msg *msg)

{

}

#endif



static char *dp_aux_get_error(u32 aux_error)

{

	switch (aux_error) {
@@ -444,7 +471,6 @@ static int dp_aux_transfer_ready(struct dp_aux_private *aux, 
static ssize_t dp_aux_transfer_debug(struct drm_dp_aux *drm_aux,

		struct drm_dp_aux_msg *msg)

{

	u8 buf[SZ_64];

	u32 timeout;

	ssize_t ret;

	struct dp_aux_private *aux = container_of(drm_aux,
@@ -482,13 +508,7 @@ static ssize_t dp_aux_transfer_debug(struct drm_dp_aux *drm_aux, 
	}



	if (aux->aux_error_num == DP_AUX_ERR_NONE) {

		snprintf(buf, SZ_64, "[drm-dp] dbg: %5s %5s %5xh(%2zu): ",

			aux->native ? "NATIVE" : "I2C",

			aux->read ? "READ" : "WRITE",

			msg->address, msg->size);



		print_hex_dump(KERN_DEBUG, buf,

			DUMP_PREFIX_NONE, 8, 1, msg->buffer, msg->size, false);

		dp_aux_hex_dump(drm_aux, msg);



		msg->reply = aux->native ?

			DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK;
@@ -511,7 +531,6 @@ static ssize_t dp_aux_transfer_debug(struct drm_dp_aux *drm_aux, 
static ssize_t dp_aux_transfer(struct drm_dp_aux *drm_aux,

		struct drm_dp_aux_msg *msg)

{

	u8 buf[SZ_64];

	ssize_t ret;

	int const retry_count = 5;

	struct dp_aux_private *aux = container_of(drm_aux,
@@ -544,13 +563,7 @@ static ssize_t dp_aux_transfer(struct drm_dp_aux *drm_aux, 
		if (aux->read)

			dp_aux_cmd_fifo_rx(aux, msg);



		snprintf(buf, SZ_64, "[drm-dp] %5s %5s %5xh(%2zu): ",

			aux->native ? "NATIVE" : "I2C",

			aux->read ? "READ" : "WRITE",

			msg->address, msg->size);



		print_hex_dump(KERN_DEBUG, buf,

			DUMP_PREFIX_NONE, 8, 1, msg->buffer, msg->size, false);

		dp_aux_hex_dump(drm_aux, msg);



		msg->reply = aux->native ?

			DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK;