[Intel-gfx] [PATCH v11 14/14] drm/i915/psr: Use new DP VSC SDP compute routine on PSR

[kbuild test robot]

Hi Gwan-gyeong,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on drm-tip/drm-tip drm-exynos/exynos-drm-next next-20200507]
[cannot apply to tegra-drm/drm/tegra/for-next linus/master v5.7-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Gwan-gyeong-Mun/In-order-to-readout-DP-SDPs-refactors-the-handling-of-DP-SDPs/20200508-034404
base:   git://anongit.freedesktop.org/drm-intel for-linux-next

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp at intel.com>

New smatch warnings:
drivers/gpu/drm/i915/display/intel_psr.c:727 intel_psr_compute_config() warn: inconsistent indenting

Old smatch warnings:
drivers/gpu/drm/i915/display/intel_psr.c:1564 intel_psr_short_pulse() error: uninitialized symbol 'error_status'.
drivers/gpu/drm/i915/display/intel_psr.c:1569 intel_psr_short_pulse() error: uninitialized symbol 'error_status'.

vim +727 drivers/gpu/drm/i915/display/intel_psr.c

   711	
   712	void intel_psr_compute_config(struct intel_dp *intel_dp,
   713				      struct intel_crtc_state *crtc_state)
   714	{
   715		struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
   716		struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
   717		const struct drm_display_mode *adjusted_mode =
   718			&crtc_state->hw.adjusted_mode;
   719		int psr_setup_time;
   720	
   721		if (!CAN_PSR(dev_priv))
   722			return;
   723	
   724		if (intel_dp != dev_priv->psr.dp)
   725			return;
   726	
 > 727		 if (!psr_global_enabled(dev_priv))
   728			return;
   729		/*
   730		 * HSW spec explicitly says PSR is tied to port A.
   731		 * BDW+ platforms have a instance of PSR registers per transcoder but
   732		 * for now it only supports one instance of PSR, so lets keep it
   733		 * hardcoded to PORT_A
   734		 */
   735		if (dig_port->base.port != PORT_A) {
   736			drm_dbg_kms(&dev_priv->drm,
   737				    "PSR condition failed: Port not supported\n");
   738			return;
   739		}
   740	
   741		if (dev_priv->psr.sink_not_reliable) {
   742			drm_dbg_kms(&dev_priv->drm,
   743				    "PSR sink implementation is not reliable\n");
   744			return;
   745		}
   746	
   747		if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {
   748			drm_dbg_kms(&dev_priv->drm,
   749				    "PSR condition failed: Interlaced mode enabled\n");
   750			return;
   751		}
   752	
   753		psr_setup_time = drm_dp_psr_setup_time(intel_dp->psr_dpcd);
   754		if (psr_setup_time < 0) {
   755			drm_dbg_kms(&dev_priv->drm,
   756				    "PSR condition failed: Invalid PSR setup time (0x%02x)\n",
   757				    intel_dp->psr_dpcd[1]);
   758			return;
   759		}
   760	
   761		if (intel_usecs_to_scanlines(adjusted_mode, psr_setup_time) >
   762		    adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vdisplay - 1) {
   763			drm_dbg_kms(&dev_priv->drm,
   764				    "PSR condition failed: PSR setup time (%d us) too long\n",
   765				    psr_setup_time);
   766			return;
   767		}
   768	
   769		crtc_state->has_psr = true;
   770		crtc_state->has_psr2 = intel_psr2_config_valid(intel_dp, crtc_state);
   771		crtc_state->infoframes.enable |= intel_hdmi_infoframe_enable(DP_SDP_VSC);
   772	}
   773	

---
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