UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915/dp: abstract rate array length limiting 

This will be useful later on. Also move the functions around to not need
forward declarations in subsequent patches. No functional changes.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/40f37f08cad33234cd86337d39e823ac6e55805f.1517482774.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2018-02-01 13:03:41 +02:00
parent 006bb4ccac
commit 10ebb73696
1 changed files with 22 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/gpu/drm/i915/intel_dp.c
View File

@ -155,6 +155,28 @@ static void intel_dp_set_sink_rates(struct intel_dp *intel_dp)
intel_dp->num_sink_rates = i;
}
/* Get length of rates array potentially limited by max_rate. */
static int intel_dp_rate_limit_len(const int *rates, int len, int max_rate)
{
int i;
/* Limit results by potentially reduced max rate */
for (i = 0; i < len; i++) {
if (rates[len - i - 1] <= max_rate)
return len - i;
}
return 0;
}
/* Get length of common rates array potentially limited by max_rate. */
static int intel_dp_common_len_rate_limit(const struct intel_dp *intel_dp,
int max_rate)
{
return intel_dp_rate_limit_len(intel_dp->common_rates,
intel_dp->num_common_rates, max_rate);
}
/* Theoretical max between source and sink */
static int intel_dp_max_common_rate(struct intel_dp *intel_dp)
{
@ -326,22 +348,6 @@ static void intel_dp_set_common_rates(struct intel_dp *intel_dp)
}
}
/* get length of common rates potentially limited by max_rate */
static int intel_dp_common_len_rate_limit(struct intel_dp *intel_dp,
int max_rate)
{
const int *common_rates = intel_dp->common_rates;
int i, common_len = intel_dp->num_common_rates;
/* Limit results by potentially reduced max rate */
for (i = 0; i < common_len; i++) {
if (common_rates[common_len - i - 1] <= max_rate)
return common_len - i;
}
return 0;
}
static bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate,
uint8_t lane_count)
{