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disp: msm: dsi: add parsing logic for panel gpio pins/address

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Add parsing code for getting the TLMM base address and size
of each GPIO pin register space along with the GPIO pins
used for the specific panel. This list is used to lend
these IO ranges to trusted vm during the trusted UI usecase.

Change-Id: I10429cfa14265d52e898815c6cf94be27daa5677
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>
This commit is contained in:
Veera Sundaram Sankaran
2020-06-22 15:09:51 -07:00
committed by Gerrit - the friendly Code Review server
parent f7fece8238
commit 30757e8c8a
3 changed files with 94 additions and 0 deletions
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81
msm/dsi/dsi_panel.c
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@@ -2044,6 +2044,87 @@ error:
return rc;
}
int dsi_panel_get_io_resources(struct dsi_panel *panel,
struct msm_io_res *io_res)
{
struct list_head temp_head;
struct msm_io_mem_entry *io_mem, *pos, *tmp;
struct list_head *mem_list = &io_res->mem;
int i, rc = 0, address_count, pin_count;
u32 *pins = NULL, *address = NULL;
u32 base, size;
struct dsi_parser_utils *utils = &panel->utils;
INIT_LIST_HEAD(&temp_head);
address_count = utils->count_u32_elems(utils->data,
"qcom,dsi-panel-gpio-address");
if (address_count != 2) {
DSI_DEBUG("panel gpio address not defined\n");
return 0;
}
address = kzalloc(sizeof(u32) * address_count, GFP_KERNEL);
if (!address)
return -ENOMEM;
rc = utils->read_u32_array(utils->data, "qcom,dsi-panel-gpio-address",
address, address_count);
if (rc) {
DSI_ERR("panel gpio address not defined correctly\n");
goto end;
}
base = address[0];
size = address[1];
pin_count = utils->count_u32_elems(utils->data,
"qcom,dsi-panel-gpio-pins");
if (pin_count < 0) {
DSI_ERR("panel gpio pins not defined\n");
rc = pin_count;
goto end;
}
pins = kzalloc(sizeof(u32) * pin_count, GFP_KERNEL);
if (!pins) {
rc = -ENOMEM;
goto end;
}
rc = utils->read_u32_array(utils->data, "qcom,dsi-panel-gpio-pins",
pins, pin_count);
if (rc) {
DSI_ERR("panel gpio pins not defined correctly\n");
goto end;
}
for (i = 0; i < pin_count; i++) {
io_mem = kzalloc(sizeof(*io_mem), GFP_KERNEL);
if (!io_mem) {
rc = -ENOMEM;
goto parse_fail;
}
io_mem->base = base + (pins[i] * size);
io_mem->size = size;
list_add(&io_mem->list, &temp_head);
}
list_splice(&temp_head, mem_list);
goto end;
parse_fail:
list_for_each_entry_safe(pos, tmp, &temp_head, list) {
list_del(&pos->list);
kzfree(pos);
}
end:
kzfree(pins);
kzfree(address);
return rc;
}
static int dsi_panel_parse_gpios(struct dsi_panel *panel)
{
int rc = 0;