[Intel-gfx] [V9 3/4] drm/i915/dsi: Add TE handler for dsi cmd mode.

[kernel test robot]

Hi Vandita,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-tip/drm-tip]
[also build test WARNING on v5.9-rc4 next-20200908]
[cannot apply to drm-intel/for-linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Vandita-Kulkarni/Add-support-for-mipi-dsi-cmd-mode/20200909-165807
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: i386-randconfig-s002-20200909 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-191-g10164920-dirty
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/i915_irq.c:2302:6: warning: no previous prototype for 'gen11_dsi_te_interrupt_handler' [-Wmissing-prototypes]
    2302 | void gen11_dsi_te_interrupt_handler(struct drm_i915_private *dev_priv,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

sparse warnings: (new ones prefixed by >>)

>> drivers/gpu/drm/i915/i915_irq.c:2302:6: sparse: sparse: symbol 'gen11_dsi_te_interrupt_handler' was not declared. Should it be static?

Please review and possibly fold the followup patch.

# https://github.com/0day-ci/linux/commit/3b071e8b378aa99a24cedbc6d3525a17f8e203e5
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Vandita-Kulkarni/Add-support-for-mipi-dsi-cmd-mode/20200909-165807
git checkout 3b071e8b378aa99a24cedbc6d3525a17f8e203e5
vim +/gen11_dsi_te_interrupt_handler +2302 drivers/gpu/drm/i915/i915_irq.c

  2301	
> 2302	void gen11_dsi_te_interrupt_handler(struct drm_i915_private *dev_priv,
  2303					    u32 te_trigger)
  2304	{
  2305		enum pipe pipe = INVALID_PIPE;
  2306		enum transcoder dsi_trans;
  2307		enum port port;
  2308		u32 val, tmp;
  2309	
  2310		/*
  2311		 * Incase of dual link, TE comes from DSI_1
  2312		 * this is to check if dual link is enabled
  2313		 */
  2314		val = I915_READ(TRANS_DDI_FUNC_CTL2(TRANSCODER_DSI_0));
  2315		val &= PORT_SYNC_MODE_ENABLE;
  2316	
  2317		/*
  2318		 * if dual link is enabled, then read DSI_0
  2319		 * transcoder registers
  2320		 */
  2321		port = ((te_trigger & DSI1_TE && val) || (te_trigger & DSI0_TE)) ?
  2322							  PORT_A : PORT_B;
  2323		dsi_trans = (port == PORT_A) ? TRANSCODER_DSI_0 : TRANSCODER_DSI_1;
  2324	
  2325		/* Check if DSI configured in command mode */
  2326		val = I915_READ(DSI_TRANS_FUNC_CONF(dsi_trans));
  2327		val = val & OP_MODE_MASK;
  2328	
  2329		if ((val != CMD_MODE_NO_GATE) && (val != CMD_MODE_TE_GATE)) {
  2330			drm_err(&dev_priv->drm, "DSI trancoder not configured in command mode\n");
  2331			return;
  2332		}
  2333	
  2334		/* Get PIPE for handling VBLANK event */
  2335		val = I915_READ(TRANS_DDI_FUNC_CTL(dsi_trans));
  2336		switch (val & TRANS_DDI_EDP_INPUT_MASK) {
  2337		case TRANS_DDI_EDP_INPUT_A_ON:
  2338			pipe = PIPE_A;
  2339			break;
  2340		case TRANS_DDI_EDP_INPUT_B_ONOFF:
  2341			pipe = PIPE_B;
  2342			break;
  2343		case TRANS_DDI_EDP_INPUT_C_ONOFF:
  2344			pipe = PIPE_C;
  2345			break;
  2346		default:
  2347			drm_err(&dev_priv->drm, "Invalid PIPE\n");
  2348			return;
  2349		}
  2350	
  2351		intel_handle_vblank(dev_priv, pipe);
  2352	
  2353		/* clear TE in dsi IIR */
  2354		port = (te_trigger & DSI1_TE) ? PORT_B : PORT_A;
  2355		tmp = I915_READ(DSI_INTR_IDENT_REG(port));
  2356		I915_WRITE(DSI_INTR_IDENT_REG(port), tmp);
  2357	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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